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•	our, or our portfolio companies’, future business, operations, operating results or prospects;

•	the return or impact of current and future investments;

•	the impact of any protracted decline in the liquidity of credit markets on our business;

•	the impact of fluctuations in interest rates on our business;

•	currency fluctuations could adversely affect the results of our investments in foreign companies, particularly to the extent that we receive payments denominated in foreign currency rather than U.S. dollars;

•	our future operating results;

•	the impact of changes in laws, policies or regulations (including the interpretation thereof) affecting our operations or the operations of our portfolio companies;

•	the valuation of our investments in portfolio companies, particularly those having no liquid trading market;

•	our ability to recover unrealized losses;

•	market conditions and our ability to access alternative debt markets and additional debt and equity capital;

•	our contractual arrangements and relationships with third parties;

•	the general economy and its impact on the industries in which we invest;

•	the financial condition of and ability of our current and prospective portfolio companies to achieve their objectives;

•	competition with other entities and our affiliates for investment opportunities;

•	the speculative and illiquid nature of our investments;

•	the use of borrowed money to finance a portion of our investments;

•	our expected financings and investments;

•	the adequacy of our cash resources and working capital;

•	the loss of key personnel;

•	the costs associated with being a publicly traded entity;

•	the timing, form and amount of any dividend distributions;

•	the timing of cash flows, if any, from the operations of our portfolio companies;

•	the ability to consummate acquisitions;

•	the ability of our investment adviser to locate suitable investments for us and to monitor and administer our investments;

•	the ability of The Carlyle Group Employee Co., L.L.C. and CELF Advisors LLP to attract and retain highly talented professionals that can provide services to our investment adviser and administrator;

•	our ability to maintain our status as a business development company; and

•	our intent to satisfy the requirements of a regulated investment company under Subchapter M of the Internal Revenue Code of 1986, as amended.

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•	the terms “we,” “us,” “our,” “Company” and “TCG BDC” refer to TCG BDC, Inc., a Maryland corporation and its consolidated subsidiaries;

•	the term “SPV” refers to TCG BDC SPV LLC, our wholly owned and consolidated subsidiary;

•	the term “2015-1 Issuer” refers to Carlyle GMS Finance MM CLO 2015-1 LLC, our wholly owned and consolidated subsidiary;

•	the term “Carlyle” refers to The Carlyle Group L.P. (NASDAQ: CG) and its affiliates and its consolidated subsidiaries (other than portfolio companies of its affiliated funds);

•	the term “CDL” refers to the Carlyle Direct Lending platform, which is Carlyle’s direct lending business unit that operates within the broader Carlyle Global Credit segment;

•	the terms “CGCA” and “Administrator” refer to Carlyle Global Credit Administration L.L.C. (formerly known as Carlyle GMS Finance Administration L.L.C.), our administrator, a wholly owned and consolidated subsidiary of Carlyle;

•	the terms “CGCIM” and “Investment Adviser” refer to Carlyle Global Credit Investment Management L.L.C. (formerly known as Carlyle GMS Investment Management L.L.C.), our investment adviser, a wholly owned and consolidated subsidiary of Carlyle;

•	the term “Credit Fund” refers to Middle Market Credit Fund, LLC, an unconsolidated limited liability company, in which we own a 50% economic interest and co-manage with Credit Partners USA LLC, and its wholly owned and consolidated subsidiaries; and

•	references to “this Form 10-K” are to our Annual Report on Form 10-K for the year ended December 31, 2017.

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•	Loans and Structured Credit. The structured credit funds invest primarily in performing senior secured bank loans through structured vehicles and other investment vehicles. As of December 31, 2017, Carlyle’s loans and structured credit team advised 46 structured credit funds and two carry funds in the United States, Europe, and Asia totaling, in the aggregate, approximately $21.6 billion in AUM.

•

Direct Lending. Carlyle’s direct lending business includes Carlyle’s BDCs, which invest primarily in middle market first lien loans (which include unitranche, “first out” and “last out” loans) and second lien loans of middle market companies, typically defined as companies with annual EBITDA ranging from $10 million to $100 million that often lack access to the broadly syndicated loan and bond markets. As of December 31, 2017, Carlyle’s direct lending investment team advised four funds consisting of two BDCs (including us), a CLO, and a corporate mezzanine fund that is past its investment period, totaling, in the aggregate, approximately $2.9 billion in AUM.

•

Opportunistic Credit. Carlyle’s opportunistic credit team invests primarily in highly-structured and privately-negotiated capital solutions supporting corporate borrowers through secured loans, senior subordinated debt, mezzanine debt, convertible notes, and other debt like instruments, as well as preferred and common equity in such borrowers. The team will also look to invest in special situations (i.e., event-driven opportunities that exhibit hybrid credit and equity features) as well as market dislocations (i.e., primary and secondary market investments in liquid debt instruments that arise as a result of temporary market volatility). As of December 31, 2017, Carlyle’s opportunistic credit team advised one fund totaling, in the aggregate, approximately $0.8 billion in AUM.

•	Energy Credit. Carlyle’s energy credit team invests primarily in privately-negotiated mezzanine debt investments in North American energy and power projects and companies. As of December 31, 2017, Carlyle’s energy credit team advised two funds with approximately $4.7 billion in AUM.

•	Distressed Credit. The distressed credit funds generally invest in liquid and illiquid securities and obligations, including secured debt, senior and subordinated unsecured debt, convertible debt obligations, preferred stock

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•	Investments—Inclusive of the use of leverage and recycled proceeds from sales and paydowns, we have deployed approximately $2.6 billion in 144 funded first lien debt investments, $448 million in 41 funded second lien debt investments, $127 million in 27 structured finance obligations, $14 million in 13 equity investments and $307 million in one investment fund through December 31, 2017.

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Facilities and the 2015-1 Notes—On May 24, 2013, our wholly owned subsidiary, the SPV, entered into a senior secured revolving credit facility (as amended, the “SPV Credit Facility”) with a maximum principal amount of $400 million. In addition, on March 21, 2014, we entered into a senior secured revolving credit facility (as amended, the “Credit Facility” and, together with the SPV Credit Facility, the “Facilities”) with a maximum principal amount of $413 million. Further, on June 26, 2015, we completed a $400 million term debt securitization (the “2015-1 Debt Securitization”). The notes offered in the 2015-1 Debt Securitization (the “2015-1 Notes”) were issued by the 2015-1 Issuer, our wholly owned and consolidated subsidiary.

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•	EBITDA of $10—$100 million;

•	Minimum of 35% original sponsor cash equity in each transaction (typically higher);

•	Sustainable leading positions in their respective markets;

•	Scalable revenues and operating cash flow;

•	Experienced management teams with successful track records;

•	Stable, predictable cash flows with low technology and market risks;

•	Diversified product offering and customer base;

•	Low capital expenditures requirements;

•	A North American base of operations;

•	Strong customer relationships;

•	Products, services or distribution channels having distinctive competitive advantages; and

•	Defensible niche strategy or other barriers to entry.

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•	maximization of investment opportunities as approximately 70% of middle market loan volume is sponsor backed as of December 31, 2017, according to the S&P Global Market Intelligence LCD Middle Market Fact Sheet;

•	validation of enterprise value;

•	support, as needed, in strategy, operations and governance of portfolio companies; and

•	the potential for additional capital commitment by sponsor if company requires financial support.

•	Overview of the opportunity and investment team recommendation

•	Structure, terms and pricing of the proposed facilities

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•	Sources and uses

•	Sponsor background, history

•	Risks and mitigants

•	Detailed analysis of historical financial statements, including analysis of EBITDA adjustments, where appropriate

•	Projections, including management/sponsor case and base case, with assumptions clearly described, including revenue and EBITDA bridge, where appropriate

•	Downside case analysis

•	Fixed/variable cost analysis

•	Business/product description

•	Customers & suppliers

•	Industry trends and analysis

•	Competition

•	Management

•	Legal, environmental, regulatory issues (if applicable)

•	Capital markets/syndication strategy (if applicable)

•	Items as to which approval is conditional and which require further due diligence and/or subsequent resolution

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•	qualify as a RIC; and

•	satisfy the Annual Distribution Requirement,

•	continue to qualify as a BDC under the Investment Company Act at all times during each taxable year;

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derive in each taxable year at least 90% of our gross income from dividends, interest, payments with respect to loans of certain securities, gains from the sale of stock or other securities or foreign currencies, net income from certain “qualified publicly traded partnerships,” or other income derived with respect to our business of investing in such stock or securities or foreign currencies (the “90% Gross Income Test”); and

•	diversify our holdings so that at the end of each quarter of the taxable year:

•	at least 50% of the value of our assets consists of cash, cash equivalents, U.S. government securities, securities of other RICs, and other securities if such other securities of any one issuer do not represent more than 5% of the value of our assets or more than 10% of the outstanding voting securities of the issuer; and

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no more than 25% of the value of our assets is invested in the securities, other than U.S. government securities or securities of other RICs, of one issuer, or two or more issuers that are controlled, as determined under applicable Code rules, by us and that are engaged in the same or similar or related trades or businesses, or of certain “qualified publicly traded partnerships” (the “Diversification Tests”).

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(1)

Securities purchased in transactions not involving any public offering from the issuer of such securities, which issuer (subject to certain limited exceptions) is an eligible portfolio company, or from any person who is, or has been during the preceding 13 months, an affiliated person of an eligible portfolio company, or from any other person, subject to such rules as may be prescribed by the SEC. An eligible portfolio company is defined in the Investment Company Act as any issuer which:

a.	is organized under the laws of, and has its principal place of business in, the United States;

b.	is not an investment company (other than a small business investment company wholly owned by the BDC) or a company that would be an investment company but for certain exclusions under the Investment Company Act; and

c.	satisfies any of the following:

i.	does not have any class of securities that is traded on a national securities exchange;

ii.	has a class of securities listed on a national securities exchange, but has an aggregate market value of outstanding voting and non-voting common equity of less than $250 million;

iii.	is controlled by a BDC or a group of companies including a BDC and the BDC has an affiliated person who is a director of the eligible portfolio company; or

iv.	is a small and solvent company having total assets of not more than $4.0 million and capital and surplus of not less than $2.0 million.

(2)	Securities of any eligible portfolio company which we control.

(3)

Securities purchased in a private transaction from a U.S. issuer that is not an investment company or from an affiliated person of the issuer, or in transactions incident thereto, if the issuer is in bankruptcy and subject to reorganization or if the issuer, immediately prior to the purchase of its securities, was unable to meet its obligations as they came due without material assistance other than conventional lending or financing arrangements.

(4)	Securities of an eligible portfolio company purchased from any person in a private transaction if there is no ready market for such securities and we already own 60% of the outstanding equity of the eligible portfolio company.

(5)	Securities received in exchange for or distributed on or with respect to securities described in (1) through (4) above, or pursuant to the exercise of warrants or rights relating to such securities.

(6)	Cash, cash equivalents, U.S. government securities or high-quality debt securities maturing in one year or less from the time of investment.

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•	pursuant to Rule 13a-14 of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”), our Chief Executive Officer and Chief Financial Officer must certify the accuracy of the financial statements contained in our periodic reports;

•	pursuant to Item 307 of Regulation S-K, our periodic reports must disclose our conclusions about the effectiveness of our disclosure controls and procedures;

•	pursuant to Rule 13a-15 of the Exchange Act, our management must prepare a report regarding its assessment of our internal control over financial reporting and must obtain an audit of the effectiveness of internal control over financial reporting performed by our independent registered public accounting firm; and

•	pursuant to Item 308 of Regulation S-K and Rule 13a-15 of the Exchange Act, our periodic reports must disclose whether there were significant changes in our internal controls over financial reporting or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to material weaknesses.

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(1)	Assumes, as of December 31, 2017, (i) $2,021.4 million in total assets, (ii) $835.9 million in outstanding indebtedness, (iii) $1,127 million in net assets and (iv) weighted average interest rate, excluding fees (such as fees on undrawn amounts and amortization of financing costs), of 3.52%.

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•	these companies may have limited financial resources and may be unable to meet their obligations under their debt securities that we hold, which may be accompanied by a deterioration in the value of any collateral and a reduction in the likelihood of us realizing on any guarantees or security we may have obtained in connection with our investment;

•	they typically have shorter operating histories, narrower product lines and smaller market shares than larger businesses, which tend to render them more vulnerable to competitors’ actions and market conditions, as well as general economic downturns;

•	they are more likely to depend on the management talents and efforts of a small group of persons; therefore, the death, disability, resignation or termination of one or more of these persons could have a material adverse impact on a portfolio company and, in turn, on us;

•

there is generally little public information about these companies. These companies and their financial information are usually not subject to the Exchange Act and other regulations that govern public companies, and we may be unable to uncover all material information about these companies, which may prevent us from making a fully informed investment decision and cause us to lose money on our investments;

•

they generally have less predictable operating results, may from time to time be parties to litigation, may be engaged in rapidly changing businesses with products subject to a substantial risk of obsolescence, and may require substantial additional capital to support their operations, finance expansion or maintain their competitive position. In addition, our executive officers, directors and our Investment Adviser may, in the ordinary course of business, be named as defendants in litigation arising from our investments in the portfolio companies;

•	changes in laws and regulations, as well as their interpretations, may adversely affect their business, financial structure or prospects; and

•	they may have difficulty accessing the capital markets to meet future capital needs, which may limit their ability to grow or to repay their outstanding indebtedness upon maturity.

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•	increase or maintain in whole or in part our equity ownership percentage;

•	exercise warrants, options or convertible securities that were acquired in the original or subsequent financing; or

•	attempt to preserve or enhance the value of our investment.

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•	significant volatility in the market price and trading volume of securities of BDCs or other companies in our sector, which are not necessarily related to the operating performance of these companies;

•	price and volume fluctuations in the overall stock market from time to time;

•	the inclusion or exclusion of our securities from certain indices;

•	changes in regulatory policies or tax guidelines, particularly with respect to RICs or BDCs;

•	any loss of RIC or BDC status;

•	changes in earnings or perceived changes or variations in operating results;

•	changes or perceived changes in the value of our portfolio of investments;

•	changes in accounting guidelines governing valuation of our investments;

•	any shortfall in revenue or net income or any increase in losses from levels expected by investors or securities analysts;

•	the inability of our Investment Adviser to employ additional experienced investment professionals or the departure of any of our Investment Adviser’s key personnel;

•	short-selling pressure with respect to shares of our common stock or BDCs generally;

•	future sales of our securities convertible into or exchangeable or exercisable for our common stock or the conversion of such securities;

•	uncertainty surrounding the strength of the U.S. economic recovery and the policies of the new presidential administration;

•	concerns regarding European sovereign debt;

•	fluctuations in base interest rates, such as LIBOR, EURIBOR, the Federal Funds Rate or the Prime Rate;

•	operating performance of companies comparable to us;

•	general economic trends and other external factors; and

•	loss of a major funding source.

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•	the time remaining to the maturity of such debt securities;

•	the outstanding principal amount of debt securities with terms identical to such debt securities;

•	the ratings assigned by national statistical ratings agencies;

•	the general economic environment;

•	the supply of such debt securities trading in the secondary market, if any;

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•	the redemption or repayment features, if any, of such debt securities;

•	the level, direction and volatility of market interest rates generally; and

•	market rates of interest higher or lower than rates borne by such debt securities.

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(1)	NAV per share is determined as of the last day in the relevant quarter and therefore may not reflect the NAV per share on the date of the high and low closing sales prices. The NAVs shown are based on outstanding shares at the end of the relevant quarter.

(2)	Calculated as the respective high or low closing sales price less NAV, divided by NAV (in each case, as of the applicable quarter).

(3)	Represents the dividend or distribution declared in the relevant quarter. The cash dividend for the fourth quarter of the year ended December 31, 2017 included a special dividend of $0.12 per share.

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(1)	Represents a special dividend.

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(1)

Shares purchased by certain individuals affiliated with Carlyle pursuant to the 10b5-1 Plan, which was entered into on June 13, 2017. Under the 10b5-1 Plan, the participants would buy up to $15,000 in the aggregate of our common stock in the open market during the period beginning July 17, 2017 and ending on the earlier of the date on which the capital committed to the 10b5-1 Plan had been exhausted or June 19, 2018, subject to certain conditions. As of February 22, 2018, the capital committed to the 10b5-1 Plan had been exhausted, and the 10b5-1 Plan was terminated in accordance with its terms.

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(1)

Cumulative per share dividends declared by the Company’s Board of Directors for the years ended December 31, 2017, 2016, 2015 and 2014. Cumulative per share dividends declared by the Company’s Board of Directors for the years ended December 31, 2017, 2016, and 2015 included a special dividend of $0.12, $0.07 and $0.18 per share, respectively. The Company’s Board of Directors did not declare a dividend during the year ended December 31, 2013.

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(1)	Average is calculated per portfolio company based on the total amount funded during the period divided by the number of portfolio companies invested/structured finance obligations made during the period.

(2)

Total return is based on the change in NAV per share during the year plus the declared dividends, assuming reinvestment of dividends in accordance with the dividend reinvestment plan, divided by the beginning NAV for the year. Total return for the years/periods ended December 31, 2017, 2016, 2015, 2014 and 2013 was inclusive of $(0.11), $0.01, $0.11 and $0.09 and $0.32, respectively, per share increase in NAV related to the offering price of the Company’s common stock. Excluding the effects of the higher offering price of the Company’s common stock, total return would have been 8.46%, 10.20%, 4.83%, 3.09% and (4.50%), respectively (refer to Note 9 in Part II, Item 8 of this Form 10-K for additional information). Total return based on change in NAV for the year ended December 31, 2013 was calculated for the period from commencement of operations through December 31, 2013.

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•	the costs associated with the private offering of our common stock prior to our initial public offering;

•	the costs of any other offerings of our common stock and other securities, if any;

•	calculating individual asset values and our net asset value (including the cost and expenses of any independent valuation firms);

•	expenses, including travel expenses, incurred by our Investment Adviser, or members of our Investment Adviser team managing our investments, or payable to third parties, performing due diligence on prospective portfolio companies and, if necessary, expenses of enforcing our rights;

•	the base management fee and any incentive fee payable under our Investment Advisory Agreement;

•	certain costs and expenses relating to distributions paid on our shares;

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•	administration fees payable under our Administration Agreement and Sub-Administration Agreements, including related expenses;

•	debt service and other costs of borrowings or other financing arrangements;

•	the allocated costs incurred by our Investment Adviser in providing managerial assistance to those portfolio companies that request it;

•	amounts payable to third parties relating to, or associated with, making or holding investments;

•	the costs associated with subscriptions to data service, research-related subscriptions and expenses and quotation equipment and services used in making or holding investments;

•	transfer agent and custodial fees;

•	costs of hedging;

•	commissions and other compensation payable to brokers or dealers;

•	federal and state registration fees;

•	any U.S. federal, state and local taxes, including any excise taxes;

•	independent director fees and expenses;

•

costs of preparing financial statements and maintaining books and records, costs of preparing tax returns, costs of Sarbanes-Oxley Act compliance and attestation and costs of filing reports or other documents with the SEC (or other regulatory bodies), and other reporting and compliance costs, including registration and listing fees, and the compensation of professionals responsible for the preparation or review of the foregoing;

•	the costs of any reports, proxy statements or other notices to our stockholders (including printing and mailing costs), the costs of any stockholders’ meetings and the compensation of investor relations personnel responsible for the preparation of the foregoing and related matters;

•	the costs of specialty and custom software for monitoring risk, compliance and overall portfolio, including any development costs incurred prior to the filing of our election to be regulated as a BDC;

•	our fidelity bond;

•	directors and officers/errors and omissions liability insurance, and any other insurance premiums;

•	indemnification payments;

•	direct fees and expenses associated with independent audits, agency, consulting and legal costs; and

•	all other expenses incurred by us or our Administrator in connection with administering our business, including our allocable share of certain officers and their staff compensation.

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(1)

Weighted average yields include the effect of accretion of discounts and amortization of premiums and are based on interest rates as of December 31, 2017 and 2016. Weighted average yield on debt and income producing securities at fair value is computed as (a) the annual stated interest rate or yield earned plus the net annual amortization of OID and market discount earned on accruing debt included in such securities, divided by (b) total first lien and second lien debt at fair value included in such securities. Weighted average yield on debt and income producing securities at amortized cost is computed as (a) the annual stated interest rate or yield earned plus the net annual amortization of OID and market discount earned on accruing debt included in such securities, divided by (b) total first lien and second lien debt at amortized cost included in such securities. Actual yields earned over the life of each investment could differ materially from the yields presented above.

(1)

Loans are generally placed on non-accrual status when principal or interest payments are past due 30 days or more or when there is reasonable doubt that principal or interest will be collected in full. Accrued and unpaid interest is generally reversed when a loan is placed on non-accrual status. Interest payments received on non-accrual loans may be recognized as income or applied to principal depending upon management’s judgment regarding collectability. Non-accrual loans are restored to accrual status when past due principal and interest has been paid current and, in management’s judgment, likely to remain current. Management may not place a loan on non-accrual status if the loan has sufficient collateral value and is in the process of collection. See Note 2 to the consolidated financial statements included in Part II, Item 8 of this Form 10-K for more information on the accounting policies.

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(1)	At par/principal amount.

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(2)

Weighted average yields include the effect of accretion of discounts and amortization of premiums and are based on interest rates as of December 31, 2017 and 2016. Weighted average yield on debt and income producing securities at fair value is computed as (a) the annual stated interest rate or yield earned plus the net annual amortization of OID and market discount earned on accruing debt included in such securities, divided by (b) total first lien and second lien debt at fair value included in such securities. Weighted average yield on debt and income producing securities at amortized cost is computed as (a) the annual stated interest rate or yield earned plus the net annual amortization of OID and market discount earned on accruing debt included in such securities, divided by (b) total first lien and second lien debt at amortized cost included in such securities. Actual yields earned over the life of each investment could differ materially from the yields presented above.

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(1)	Unless otherwise indicated, issuers of investments held by Credit Fund are domiciled in the United States. As of December 31, 2017, the geographical composition of investments as a percentage of fair value was 1.07% in Canada, 2.52% in the United Kingdom and 96.41% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate (“P”)), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2017. As of December 31, 2017, all of Credit Fund’s LIBOR loans were indexed to the 90-day LIBOR rate at 1.69%, except for those loans as indicated in Notes 11 and 12 below.

(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by Credit Fund Sub. Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub. Accordingly, such assets are not available to creditors of Credit Fund.

(5)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, with the fair value of all investments determined using significant unobservable inputs which is substantially similar to the valuation policy of the Company provided in “—Critical Accounting Policies—Fair Value Measurements.”

(7)	Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into the Credit Fund Facility. The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund. Accordingly, such assets are not available to creditors of Credit Fund Sub.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, Credit Fund is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.97%) and Surgical Information Systems, LLC (1.01%). Pursuant to the agreement among lenders in respect of these loan, these investments represent a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

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(10)	As of December 31, 2017, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2017, this LIBOR loan was indexed to the 30-day LIBOR rate at 1.56%.

(12)	As of December 31, 2017, this LIBOR loan was indexed to the 180-day LIBOR rate at 1.84%.

(13)	Denotes that all or a portion of the assets are owned by the 2017-1 Issuer and secure the notes issued in connection with a $399,900 term debt securitization completed by Credit Fund on December 19, 2017 (the “2017-1 Debt Securitization”). Accordingly, such assets are not available to creditors of Credit Fund or Credit Fund Sub.

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(1)	Unless otherwise indicated, issuers of investments held by Credit Fund are domiciled in the United States. As of December 31, 2016, the geographical composition of investments as a percentage of fair value was 2.43% in Canada and 97.57% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR (“L”) or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate (“P”)), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2016. As of December 31, 2016, all of Credit Fund’s LIBOR loans were indexed to the 90-day LIBOR rate at 1.00%, except for those loans as indicated in Note 11 below, and the U.S. Prime Rate loan was indexed at 3.75%.

(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by Credit Fund Sub. Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub. Accordingly, such assets are not available to creditors of Credit Fund.

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(5)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, which is substantially similar to the valuation policy of the Company provided in “—Critical Accounting Policies—Fair Value Measurements.”

(7)	Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into the Credit Fund Facility. The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund. Accordingly, such assets are not available to creditors of Credit Fund Sub.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, Credit Fund is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.84%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(10)	As of December 31, 2016, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2016, this LIBOR loan was indexed to the 30-day LIBOR rate at 0.77%.

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(1)	The unused portion is the amount upon which commitment fees are based.

(2)	Available for borrowing based on the computation of collateral to support the borrowings and subject to compliance with applicable covenants and financial ratios.

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(1)	Represents a special dividend.

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•	the nature and realizable value of any collateral;

•	call features, put features and other relevant terms of debt;

•	the portfolio company’s leverage and ability to make payments;

•	the portfolio company’s public or private credit rating;

•	the portfolio company’s actual and expected earnings and discounted cash flow;

•	prevailing interest rates and spreads for similar securities and expected volatility in future interest rates;

•	the markets in which the portfolio company does business and recent economic and/or market events; and

•	comparisons to comparable transactions and publicly traded securities.

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Level 1—inputs to the valuation methodology are quoted prices available in active markets for identical investments as of the reporting date. The types of financial instruments included in Level 1 generally include unrestricted securities, including equities and derivatives, listed in active markets. The Company does not adjust the quoted price for these investments, even in situations where the Company holds a large position and a sale could reasonably impact the quoted price.

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Level 2—inputs to the valuation methodology are either directly or indirectly observable as of the reporting date and are those other than quoted prices in active markets. The type of financial instruments in this category generally includes less liquid and restricted securities listed in active markets, securities traded in other than active markets, government and agency securities, and certain over-the-counter derivatives where the fair value is based on observable inputs.

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Level 3—inputs to the valuation methodology are unobservable and significant to overall fair value measurement. The inputs into the determination of fair value require significant management judgment or estimation. Financial instruments that are included in this category generally include investments in privately-held entities, collateralized loan obligations, and certain over-the-counter derivatives where the fair value is based on unobservable inputs.

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•	no incentive fee based on pre-incentive fee net investment income in any calendar quarter in which its pre-incentive fee net investment income does not exceed the hurdle rate of 1.50%;

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100% of pre-incentive fee net investment income with respect to that portion of such pre-incentive fee net investment income, if any, that exceeds the hurdle rate but is less than 1.82% in any calendar quarter (7.28% annualized). The Company refers to this portion of the pre-incentive fee net investment income (which exceeds the hurdle rate but is less than 1.82%) as the “catch-up.” The “catch-up” is meant to provide the Investment Adviser with approximately 17.5% of the Company’s pre-incentive fee net investment income as if a hurdle rate did not apply if this net investment income exceeds 1.82% in any calendar quarter; and

•	17.5% of the amount of pre-incentive fee net investment income, if any, that exceeds 1.82% in any calendar quarter (7.28% annualized) will be payable to the Investment Adviser. This reflects that once the hurdle rate is reached and the catch-up is achieved, 17.5% of all pre-incentive fee investment income thereafter is allocated to the Investment Adviser.

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(1)

Unless otherwise indicated, issuers of debt and equity investments held by TCG BDC, Inc. (together with its consolidated subsidiaries, “we,” “us,” “our,” “TCG BDC” or the “Company”) are domiciled in the United States and issuers of structured finance obligations are domiciled in the Cayman Islands. Under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “Investment Company Act”), the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. As of December 31, 2017, the Company does not “control” any of these portfolio companies. Under the Investment Company Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of December 31, 2017, the Company is not an “affiliated person” of any of these portfolio companies.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR (“L”) or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate), which generally resets quarterly. For each such loan, the Company has provided the interest rate in effect as of December 31, 2017. As of December 31, 2017, all of our LIBOR loans were indexed to the 90-day LIBOR rate at 1.69%, except for those loans as indicated in Notes 16 and 17 below.

(3)	Loan includes interest rate floor feature.

(4)

Denotes that all or a portion of the assets are owned by the Company’s wholly owned subsidiary, TCG BDC SPV LLC (the “SPV”). The SPV has entered into a senior secured revolving credit facility (as amended, the “SPV Credit Facility”). The lenders of the SPV Credit Facility have a first lien security interest in substantially all of the assets of the SPV (see Note 6, Borrowings). Accordingly, such assets are not available to creditors of the Company or Carlyle GMS Finance MM CLO 2015-1 LLC (the “2015-1 Issuer”).

(5)

Denotes that all or a portion of the assets are owned by the Company. The Company has entered into a senior secured revolving credit facility (as amended, the “Credit Facility” and, together with the SPV Credit Facility, the “Facilities”). The lenders of the Credit Facility have a first lien security interest in substantially all of the portfolio investments held by the Company (see Note 6, Borrowings). Accordingly, such assets are not available to creditors of the SPV or the 2015-1 Issuer.

(6)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(7)

Fair value is determined in good faith by or under the direction of the Board of Directors of the Company (see Note 2, Significant Accounting Policies, and Note 3, Fair Value Measurements), pursuant to the Company’s valuation policy. The fair value of all first lien and second lien debt investments, equity investments and the investment fund mezzanine loan was determined using significant unobservable inputs.

(8)	The Company has determined the indicated investments are non-qualifying assets under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Company’s total assets.

(9)	Represents a corporate mezzanine loan, which is subordinated to senior secured term loans of the portfolio company/investment fund.

(10)	Loan was on non-accrual status as of December 31, 2017.

(11)	Under the Investment Company Act, the Company is deemed to be an “affiliated person” of and “control” this investment fund because the Company owns more than 25% of the investment fund’s outstanding voting securities and/or has the power to exercise control over management or policies of such investment fund. See Note 5, Middle Market Credit Fund, LLC, for more details.

(12)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, the Company is entitled to receive additional interest as a result of an agreement among lenders as follows: Dimensional Dental Management, LLC (4.58%), EIP Merger Sub, LLC (Evolve IP) (3.97%), Legacy.com Inc. (4.11%), Payment Alliance International, Inc. (2.70%), Prime Risk Partners, Inc. (3.32%), Product Quest Manufacturing, LLC (3.54%), Reliant Pro Rehab (nil), Surgical Information Systems, LLC (1.01%) and The Hilb Group, LLC (3.38%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(13)	Denotes that all or a portion of the assets are owned by the 2015-1 Issuer and secure the notes issued in connection with a $400,000 term debt securitization completed by the Company on June 26, 2015 (the “2015-1 Debt Securitization”, see Note 7, 2015-1 Notes). Accordingly, such assets are not available to the creditors of the SPV or the Company.

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(14)	As of December 31, 2017, the Company had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(16)	As of December 31, 2017, this LIBOR loan was indexed to the 30-day LIBOR rate at 1.56%.

(17)	As of December 31, 2017, this LIBOR loan was indexed to the 180-day LIBOR rate at 1.84%.

(18)	Under the Investment Company Act, the Company is deemed an “affiliated person” of this portfolio company because the Company owns 5% or more of the portfolio company’s outstanding voting securities.

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(1)

Unless otherwise indicated, issuers of debt and equity investments held by the Company are domiciled in the United States and issuers of structured finance obligations are domiciled in the Cayman Islands. Under the Investment Company Act the Company would be deemed to “control” a portfolio company if the Company owned more than 25% of its outstanding voting securities and/or held the power to exercise control over the management or policies of the portfolio company. As of December 31, 2016, the Company does not “control” any of these portfolio companies. Under the Investment Company Act, the Company would be deemed an “affiliated person” of a portfolio company if the Company owns 5% or more of the portfolio company’s outstanding voting securities. As of December 31, 2016, the Company is not an “affiliated person” of any of these portfolio companies.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate), which generally resets quarterly. For each such loan, the Company has provided the interest rate in effect as of December 31, 2016. As of December 31, 2016, all of our LIBOR loans were indexed to the 90-day LIBOR rate at 1.00%, except for those loans as indicated in Note 16 below.

(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by the SPV. The SPV has entered into the SPV Credit Facility. The lenders of the SPV Credit Facility have a first lien security interest in substantially all of the assets of the SPV. Accordingly, such assets are not available to creditors of the Company or the 2015-1 Issuer.

(5)	Denotes that all or a portion of the assets are owned by the Company. The Company has entered into the Credit Facility. The lenders of the Credit Facility have a first lien security interest in substantially all of the portfolio investments held by the Company. Accordingly, such assets are not available to creditors of the SPV or the 2015-1 Issuer.

(6)

Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method. Equity tranche CLO fund investments, which are referred to as “structured finance obligations”, are recorded at amortized cost using the effective interest method.

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(7)	Fair value is determined in good faith by or under the direction of the Board of Directors of the Company (see Note 2, Significant Accounting Policies, and Note 3, Fair Value Measurements), pursuant to the Company’s valuation policy.

(8)	The Company has determined the indicated investments are non-qualifying assets under Section 55(a) of the Investment Company Act. Under the Investment Company Act, the Company may not acquire any non-qualifying assets unless, at the time such acquisition is made, qualifying assets represent at least 70% of the Company’s total assets.

(9)	Represents a corporate mezzanine loan, which is subordinated to senior secured term loans of the portfolio company/investment fund.

(10)	Loan was on non-accrual status as of December 31, 2016.

(11)

As of December 31, 2016, the Company has a greater than 25% but less than 50% equity or subordinated notes ownership interest in certain structured finance obligations. These investments have governing documents that preclude the Company from controlling management of the entity and therefore the Company has determined that the issuer of the investment is not a controlled affiliate or a non-controlled affiliate because the investments are not “voting securities”.

(12)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, the Company is entitled to receive additional interest as a result of an agreement among lenders as follows: Dimensional Dental Management, LLC (4.54%), EIP Merger Sub, LLC (Evolve IP) (3.84%), International Medical Group, Inc. (4.64%), Product Quest Manufacturing, LLC (3.54%), PSI Services LLC (4.40%), Reliant Pro Rehab, LLC (nil) and The Hilb Group, LLC (3.96%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(13)	Denotes that all or a portion of the assets are owned by the 2015-1 Issuer and secure the notes issued in connection with the 2015-1 Debt Securitization. Accordingly, such assets are not available to the creditors of the SPV or the Company.

(14)	Under the Investment Company Act, the Company is deemed to be an “affiliated person” of and “control” this investment fund because the Company owns more than 25% of the investment fund’s outstanding voting securities and/or has the power to exercise control over management or policies of such investment fund. See Note 5, Middle Market Credit Fund, LLC, for more details.

(15)	As of December 31, 2016, the Company had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(16)	As of December 31, 2016, this LIBOR loan was indexed to the 30-day LIBOR rate at 0.77%.

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•	the nature and realizable value of any collateral;

•	call features, put features and other relevant terms of debt;

•	the portfolio company’s leverage and ability to make payments;

•	the portfolio company’s public or private credit rating;

•	the portfolio company’s actual and expected earnings and discounted cash flow;

•	prevailing interest rates and spreads for similar securities and expected volatility in future interest rates;

•	the markets in which the portfolio company does business and recent economic and/or market events; and

•	comparisons to comparable transactions and publicly traded securities.

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Level 1—inputs to the valuation methodology are quoted prices available in active markets for identical investments as of the reporting date. The types of financial instruments in Level 1 generally include unrestricted securities, including equities and derivatives, listed in active markets. The Company does not adjust the quoted price for these investments, even in situations where the Company holds a large position and a sale could reasonably impact the quoted price.

•

Level 2—inputs to the valuation methodology are either directly or indirectly observable as of the reporting date and are those other than quoted prices in active markets. The type of financial instruments in this category generally includes less liquid and restricted securities listed in active markets, securities traded in other than active markets, government and agency securities, and certain over-the-counter derivatives where the fair value is based on observable inputs.

•

Level 3—inputs to the valuation methodology are unobservable and significant to overall fair value measurement. The inputs into the determination of fair value require significant management judgment or estimation. Financial instruments that are in this category generally include investments in privately-held entities, CLOs, and certain over-the-counter derivatives where the fair value is based on unobservable inputs.

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(1)	Amount represents the Company’s subordinated loan and member’s interest investments in Credit Fund. The fair value of these investments has been estimated using the net asset value of the Company’s ownership interests in Credit Fund.

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•	no incentive fee based on pre-incentive fee net investment income in any calendar quarter in which its pre-incentive fee net investment income does not exceed the hurdle rate of 1.50%;

•

100% of pre-incentive fee net investment income with respect to that portion of such pre-incentive fee net investment income, if any, that exceeds the hurdle rate but is less than 1.82% in any calendar quarter (7.28% annualized). The Company refers to this portion of the pre-incentive fee net investment income (which exceeds the hurdle rate but is less than 1.82%) as the “catch-up.” The “catch-up” is meant to provide the Investment Adviser with approximately 17.5% of the Company’s pre-incentive fee net investment income as if a hurdle rate did not apply if this net investment income exceeds 1.82% in any calendar quarter; and

•	17.5% of the amount of pre-incentive fee net investment income, if any, that exceeds 1.82% in any calendar quarter (7.28% annualized) will be payable to the Investment Adviser. This reflects that once the hurdle rate is reached and the catch-up is achieved, 17.5% of all pre-incentive fee investment income thereafter is allocated to the Investment Adviser.

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(1)	At par/principal amount.

(2)	Weighted average yields include the effect of accretion of discounts and amortization of premiums and are based on interest rates as of December 31, 2017 and 2016. Weighted average yield on debt and income producing securities at

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(1)	Unless otherwise indicated, issuers of investments held by Credit Fund are domiciled in the United States. As of December 31, 2017, the geographical composition of investments as a percentage of fair value was 1.07% in Canada, 2.52% in the United Kingdom, and 96.41% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate (“P”)), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2017. As of December 31, 2017, all of Credit Fund’s LIBOR loans were indexed to the 90-day LIBOR rate at 1.69%, except for those loans as indicated in Notes 11 and 12 below.

(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by Credit Fund Sub. Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub. Accordingly, such assets are not available to creditors of Credit Fund or the 2017-1 Issuer.

(5)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, with the fair value of all investments determined using significant unobservable inputs, which is substantially similar to the valuation policy of the Company provided in Note 3, Fair Value Measurements.

(7)	Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into the Credit Fund Facility. The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund. Accordingly, such assets are not available to creditors of Credit Fund Sub or the 2017-1 Issuer.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, the Company is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.97%) and Surgical Information Systems, LLC (1.01%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

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(10)	As of December 31, 2017, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2017, this LIBOR loan was indexed to the 30-day LIBOR rate at 1.56%.

(12)	As of December 31, 2017, this LIBOR loan was indexed to the 180-day LIBOR rate at 1.84%.

(13)	Denotes that all or a portion of the assets are owned by the 2017-1 Issuer and secure the notes issued in connection with a $399,900 term debt securitization completed by Credit Fund on December 19, 2017 (the “2017-1 Debt Securitization”). Accordingly, such assets are not available to creditors of Credit Fund or Credit Fund Sub.

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(1)	Unless otherwise indicated, issuers of investments held by Credit Fund are domiciled in the United States. As of December 31, 2016, the geographical composition of investments as a percentage of fair value was 2.43% in Canada and 97.57% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2016. As of December 31, 2016, all of Credit Fund’s LIBOR loans were indexed to the 90-day LIBOR rate at 1.00%, except for those loans as indicated in Note 11 below, and the U.S. Prime Rate loan was indexed at 3.75%.

(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by Credit Fund Sub. Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub. Accordingly, such assets are not available to creditors of Credit Fund.

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(5)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, which is substantially similar to the valuation policy of the Company provided in “—Critical Accounting Policies—Fair Value Measurements.”

(7)	Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into the Credit Fund Facility. The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund. Accordingly, such assets are not available to creditors of Credit Fund Sub.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, Credit Fund is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.84%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(10)	As of December 31, 2016, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2016, this LIBOR loan was indexed to the 30-day LIBOR rate at 0.77%.

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(1)	The unused portion is the amount upon which commitment fees are based.

(2)	Available for borrowing based on the computation of collateral to support the borrowings and subject to compliance with applicable covenants and financial ratios.

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(1)	Represents a special dividend.

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(1)

For the years ended December 31, 2017, 2016, 2015, 2014 and 2013, net investment income (loss) per share was calculated as net investment income (loss) for the year divided by the weighted-average number of shares outstanding for the year. For the year ended December 31, 2013, net investment income (loss) per share was calculated as net investment income (loss) for the period divided by the weighted average number of shares outstanding for the period June 5, 2013 (date of issuance of shares related to the first capital drawdown) through December 31, 2013.

(2)	For the years ended December 31, 2017, 2016, 2015, 2014 and 2013, dividends declared per share was calculated as the sum of dividends declared during the year divided by the number of shares outstanding at each respective quarter-end date (refer to Notes 9 and 12).

(3)	Increase (decrease) is due to the offering price of subscriptions and the issuance of common stock in the IPO, net of underwriting and offering costs during the period (refer to Note 9).

(4)

Total return is based on the change in net asset value per share during the year plus the declared dividends, assuming reinvestment of dividends in accordance with the dividend reinvestment plan, divided by the beginning net asset value for the year. Total return for the year ended December 31, 2013 was calculated for the period from commencement of operations through December 31, 2013. Total return for the years ended December 31, 2017, 2016, 2015, 2014 and 2013 was inclusive of $(0.11), $0.01, $0.11, $0.09, and $0.32 respectively, per share increase (decrease) in net asset value for the years related to the offering price of subscriptions and the offering price of common stock in the IPO, net of underwriting and offering costs during the year. Excluding the effects of these common stock issuances, total return would have been 8.46%, 10.20%, 4.83%, 3.09% and (4.50%), respectively (refer to Note 9).

(5)	Total return based on market value (not annualized) is calculated as the change in market value per share during the period plus the declared dividends, assuming reinvestment of dividends in accordance with the dividend reinvestment

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(6)	The Company commenced operations on May 2, 2013; therefore, ratios to average net assets and portfolio turnover for the year ended December 31, 2013 may have been different had there been a full year of operations.

(7)	The net investment income ratio is net of the waiver of base management fees.

(1)	Consists of the unamortized portion of organization costs as of December 31, 2017 and 2016, respectively.

(2)	The difference between the book-basis and tax-basis unrealized appreciation (depreciation) on investments is attributable primarily to the tax treatment of passive foreign investment companies, which include the structured finance obligations.

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*	Filed herewith.

(1)	Incorporated by reference to Exhibit 3.1 to the Company’s Form 10-12G/A filed by the Company on April 11, 2013 (File No. 000-54899)

(2)	Incorporated by reference to Exhibit 3.2 to the Company’s Form 10-K filed by the Company on March 22, 2017 (File No. 000-54899)

(3)	Incorporated by reference to Exhibit 3.2 to the Company’s Form 10-12G/A filed by the Company on April 11, 2013 (File No. 000-54899)

(4)	Incorporated by reference to Exhibit 3.4 to the Company’s Form 10-K filed by the Company on March 22, 2017 (File No. 000-54899)

(5)	Incorporated by reference to Exhibit 4.1 to the Company’s Form 10-12G/A filed by the Company on April 11, 2013 (File No. 000-54899)

(6)	Incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q filed by the Company on August 12, 2015 (File No. 814-00995)

(7)	Incorporated by reference to Exhibit (e)(1) to the Company’s Form N-2 filed by the Company on June 5, 2017 (File No. 333-218114)

(7)	Incorporated by reference to Exhibit (e)(2) to the Company’s Form N-2 filed by the Company on June 5, 2017 (File No. 333-218114)

(8)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 8-K filed by the Company on September 20, 2017 (File No. 814-00995)

(9)	Incorporated by reference to Exhibit (j) to the Company’s Registration Statement on Form N-2 filed by the Company on May 19, 2017 (File No. 333-218114)

(10)	Incorporated by reference to Exhibit 10.2 to the Company’s Form 10-12G/A filed by the Company on April 11, 2013 (File No. 000-54899)

(11)	Incorporated by reference to Exhibit 10.3 to the Company’s Form 10-12G/A filed by the Company on April 11, 2013 (File No. 000-54899)

(12)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on July 31, 2013 (File No. 814-00995)

(13)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on May 9, 2014 (File No. 814-00995)

(14)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on August 13, 2014 (File No. 814-00995)

(15)	Incorporated by reference to Exhibit 10.7 to the Company’s Form 10-K filed by the Company on March 27, 2015 (File No. 814-00995)

(16)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on August 8, 2016 (File No. 814-00995)

(17)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on August 12, 2015 (File No. 814-00995)

(18)	Incorporated by reference to Exhibit 10.3 to the Company’s Form 10-Q filed by the Company on August 12, 2015 (File No. 814-00995)

(19)	Incorporated by reference to Exhibit 10.4 to the Company’s Form 10-Q filed by the Company on August 12, 2015 (File No. 814-00995)

(20)	Incorporated by reference to Exhibit 10.2 to the Company’s Form 10-Q filed by the Company on August 8, 2016 (File No. 814-00995)

(21)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on May 10, 2017 (File No. 814-00995)

(22)	Incorporated by reference to Exhibit (k)(13) to the Company’s Form N-2 filed by the Company on June 5, 2017 (File No. 333-218114)

(23)	Incorporated by reference to Exhibit 10.1 to the Company’s Form 10-Q filed by the Company on November 10, 2016 (File No. 814-00995)

(24)	Incorporated by reference to Exhibit 2.1 to the Company’s Form 8-K filed by the Company on May 9, 2017 (File No. 814-00995)

(25)	Incorporated by reference to Exhibit (r)(1) to the Company’s Form N-2 filed by the Company on June 8, 2017 (File No. 333-218114)

(26)	Incorporated by reference to Exhibit (r)(2) to the Company’s Form N-2 filed by the Company on June 8, 2017 (File No. 333-218114)

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(27)	Incorporated by reference to Exhibit 21.1 to the Company's Form 10-12G filed by the Company on February 11, 2013 (File No. 000-54899)

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1.	I have reviewed this annual report on Form 10-K of TCG BDC, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

1.	I have reviewed this annual report on Form 10-K of TCG BDC, Inc.;

2.	Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.	Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4.	The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a.	Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b.	Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c.	Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d.	Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5.	The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a.	All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b.	Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

•	the Form 10-K of the Company for the year ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Form 10-K”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

•	the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

*	The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

•	the Form 10-K of the Company for the year ended December 31, 2017 as filed with the Securities and Exchange Commission on the date hereof (the “Form 10-K”), fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

•	the information contained in the Form 10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

*	The foregoing certification is being furnished solely pursuant to 18 U.S.C. Section 1350 and is not being filed as part of the Report or as a separate disclosure document.

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(1)	Unless otherwise indicated, issuers of investments held by Middle Market Credit Fund, LLC (together with its consolidated subsidiaries, “Credit Fund”) are domiciled in the United States. As of December 31, 2017, the geographical composition of investments as a percentage of fair value was 1.07% in Canada, 2.52% in the United Kingdom, and 96.41% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate (“P”)), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2017. As of December 31, 2017, all of Credit Fund’s LIBOR loans were indexed to the 90-day LIBOR rate at 1.69%, except for those loans as indicated in Notes 11 and 12 below.

(3)	Loan includes interest rate floor feature.

(4)

Denotes that all or a portion of the assets are owned by Middle Market Credit Fund SPV, LLC (the “Credit Fund Sub”). Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub (see Note 5, Borrowings). Accordingly, such assets are not available to creditors of Credit Fund or the MMCF CLO 2017-1 LLC (the “2017-1 Issuer”).

(5)	Amortized cost represents original cost, including origination fees and upfront fees received that are deemed to be an adjustment to yield, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, which is substantially similar to the valuation policy of the Company provided in Note 3, Fair Value Measurements.

(7)

Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into a revolving credit facility (the “Credit Fund Facility”). The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund (see Note 5, Borrowings). Accordingly, such assets are not available to creditors of Credit Fund Sub or the 2017-1 Issuer.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

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(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, the Company is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.97%) and Surgical Information Systems, LLC (1.01%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(10)	As of December 31, 2017, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2017, this LIBOR loan was indexed to the 30-day LIBOR rate at 1.56%.

(12)	As of December 31, 2017, this LIBOR loan was indexed to the 180-day LIBOR rate at 1.84%.

(13)	Denotes that all or a portion of the assets are owned by the 2017-1 Issuer and secure the notes issued in connection with a $399,900 term debt securitization completed by Credit Fund on December 19, 2017 (see Note 6, 2017-1 Notes). Accordingly, such assets are not available to creditors of Credit Fund or Credit Fund Sub.

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(1)	Unless otherwise indicated, issuers of investments held by Credit Fund are domiciled in the United States. As of December 31, 2016, the geographical composition of investments as a percentage of fair value was 2.43% in Canada and 97.57% in the United States.

(2)

Variable rate loans to the portfolio companies bear interest at a rate that may be determined by reference to either LIBOR or an alternate base rate (commonly based on the Federal Funds Rate or the U.S. Prime Rate (“P”)), which generally resets quarterly. For each such loan, Credit Fund has provided the interest rate in effect as of December 31, 2016. As of December 31, 2016, all of Credit Fund’s LIBOR loans were indexed to the 90-day

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(3)	Loan includes interest rate floor feature.

(4)	Denotes that all or a portion of the assets are owned by Credit Fund Sub. Credit Fund Sub has entered into a revolving credit facility (the “Credit Fund Sub Facility”). The lenders of the Credit Fund Sub Facility have a first lien security interest in substantially all of the assets of Credit Fund Sub. Accordingly, such assets are not available to creditors of Credit Fund.

(5)	Amortized cost represents original cost, including origination fees, adjusted for the accretion/amortization of discounts/premiums, as applicable, on debt investments using the effective interest method.

(6)	Fair value is determined in good faith by or under the direction of the board of managers of Credit Fund, pursuant to Credit Fund’s valuation policy, which is substantially similar to the valuation policy of the Company provided in Note 3, Fair Value Measurements.

(7)	Denotes that all or a portion of the assets are owned by Credit Fund. Credit Fund has entered into the Credit Fund Facility. The lenders of the Credit Fund Facility have a first lien security interest in substantially all of the assets of Credit Fund. Accordingly, such assets are not available to creditors of Credit Fund Sub.

(8)

Credit Fund receives less than the stated interest rate of this loan as a result of an agreement among lenders. The interest rate reduction is 1.25%% on EIP Merger Sub, LLC (Evolve IP). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/first out loan, which has first priority ahead of the first lien/last out loan with respect to principal, interest and other payments.

(9)

In addition to the interest earned based on the stated interest rate of this loan, which is the amount reflected in this schedule, the Company is entitled to receive additional interest as a result of an agreement among lenders as follows: EIP Merger Sub, LLC (Evolve IP) (3.84%). Pursuant to the agreement among lenders in respect of this loan, this investment represents a first lien/last out loan, which has a secondary priority behind the first lien/first out loan with respect to principal, interest and other payments.

(10)	As of December 31, 2016, Credit Fund had the following unfunded commitments to fund delayed draw and revolving senior secured loans:

(11)	As of December 31, 2016, this LIBOR loan was indexed to the 30-day LIBOR rate at 0.77%.

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•

Level I—inputs to the valuation methodology are quoted prices available in active markets for identical investments as of the reporting date. The types of financial instruments in Level I generally include unrestricted securities, including equities and derivatives, listed in active markets. Credit Fund does not adjust the quoted price for these investments, even in situations where Credit Fund holds a large position and a sale could reasonably impact the quoted price.

•

Level II—inputs to the valuation methodology are either directly or indirectly observable as of the reporting date and are those other than quoted prices in active markets. The type of financial instruments in this category generally includes less liquid and restricted securities listed in active markets, securities traded in other than active markets, government and agency securities, and certain over-the-counter derivatives where the fair value is based on observable inputs.

•

Level III—inputs to the valuation methodology are unobservable and significant to overall fair value measurement. The inputs into the determination of fair value require significant management judgment or estimation. Financial instruments that are in this category generally include investments in privately-held entities and certain over-the-counter derivatives where the fair value is based on unobservable inputs.

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(1)	The unused portion is the amount upon which commitment fees are based.

(2)	Available for borrowing based on the computation of collateral to support the borrowings.

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(1)

The internal rate of return since inception (“IRR”) was computed based on the dates of members’ equity contributions to Credit Fund, distributions from Credit Fund to Members in respect of their equity, and the fair value of the members’ equity as of December 31, 2017 and 2016. The IRR of the Members is net of all fees and expenses. Because IRR does not include contributions from, distribution to or the carrying value of the Members’ subordinated loans, the IRRs for the year ended December 31, 2017 and the period from the commencement of operations to December 31, 2016 are not a meaningful measure of Credit Fund’s performance for its Members. Inclusive of contributions from, distribution to and the carrying value of the Members’ equity and subordinated loans, the IRR of the Members’ equity and subordinated loans was 14.4% for the period from the commencement of operations to December 31, 2017.

(2)

The expense ratios are calculated as the total operating expenses allocated to the Members divided by the fair value of the Members’ weighted average capital balance for the period presented as defined by the disclosure requirements for investment companies. Pursuant to the LLC Agreement, there are no management or incentive fees. Expenses were not annualized in calculating the expense ratio. Because the expense ratios do not include the carrying value of the Members’ weighted average subordinated loans, the expense ratios for the period from the year ended December 31, 2017 and the commencement of operations to December 31, 2016 are not a meaningful measure of Credit Fund’s expenses for its Members. Inclusive of the carrying value of the Members’ equity and subordinated loans, the total expense ratio of the Members’ equity and subordinated loans for the year ended December 31, 2017 and the period from the commencement of operations to December 31, 2016 were 25.1% and 18.3%, respectively.

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(3)

The net investment income ratio is the excess of the Members’ investment income over total expenses divided by the fair value of the Members’ weighted average capital balance for the period presented. Net investment income was not annualized in calculating the net investment income ratio. Because the net investment income ratio does not include the carrying value of the Members’ weighted average subordinated loans, the net investment income ratios for the year ended December 31, 2017 and the period from the commencement of operations to December 31, 2016 are not a meaningful measure of Credit Fund’s net investment income for its Members. Inclusive of the carrying value of the Members’ equity and subordinated loans, the net investment income ratio of the Members’ equity and subordinated loans for the year ended December 31, 2017 and the period from the commencement of operations to December 31, 2016 were 12.9% and 9.1%, respectively.