ORGANIZATION	3 Months Ended
Mar. 31, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	1. ORGANIZATION Carlyle Secured Lending, Inc. (together with its consolidated subsidiaries, “CGBD” or the “Company”) is a Maryland corporation formed on February 8, 2012, and structured as an externally managed, non-diversified closed-end investment company. The Company has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “Investment Company Act”). In addition, the Company has elected to be treated, and intends to continue to comply with the requirements to qualify annually, as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (together with the rules and regulations promulgated thereunder, the “Code”). The Company’s investment objective is to generate current income and, to a lesser extent, capital appreciation primarily through assembling a portfolio of secured debt investments in U.S. middle market companies. The Company's core investment strategy focuses on lending to U.S. middle market companies, which the Company defines as companies with approximately $25.0 million or greater of earnings before interest, taxes, depreciation and amortization (“EBITDA”), supported by financial sponsors. This core strategy is opportunistically supplemented with differentiated and complementary lending and investing strategies, which take advantage of the broad capabilities of Carlyle’s Global Credit platform while offering risk-diversifying portfolio benefits. The Company seeks to achieve its objective primarily through direct origination of secured debt instruments, including first lien senior secured loans (which may include stand-alone first lien loans, first lien/last out loans and “unitranche” loans) and second lien senior secured loans (collectively, “Middle Market Senior Loans”), with a minority of its assets invested in higher yielding investments (which may include unsecured debt, subordinated debt and investments in equities and structured products). The Middle Market Senior Loans are generally made to private U.S. middle market companies that are, in many cases, controlled by private equity firms. The Company invests primarily in loans to middle market companies whose debt has been rated below investment grade, or would likely be rated below investment grade if it was rated. These securities, which are often referred to as “junk,” have predominately speculative characteristics with respect to the issuer’s capacity to pay interest and repay principal. On May 2, 2013, the Company completed its initial closing of capital commitments (the “Initial Closing”) and subsequently commenced substantial investment operations. Effective March 15, 2017, the Company changed its name from “Carlyle GMS Finance, Inc.” to “TCG BDC, Inc.” On June 19, 2017, the Company closed its initial public offering, issuing 9,454,200 shares of its common stock (including shares issued pursuant to the exercise of the underwriters’ over-allotment option on July 5, 2017) at a public offering price of $18.50 per share. Net of underwriting costs, the Company received cash proceeds of $169,488. Shares of common stock of the Company began trading on the Nasdaq Global Select Market under the symbol “CGBD” on June 14, 2017. Effective April 12, 2022, the Company changed its name from “TCG BDC, Inc.” to “Carlyle Secured Lending, Inc.” The Company is externally managed by its investment adviser, Carlyle Global Credit Investment Management L.L.C. (the “Investment Adviser”), a wholly owned subsidiary of The Carlyle Group Inc. and an investment adviser registered under the Investment Advisers Act of 1940, as amended. Carlyle Global Credit Administration L.L.C. (the “Administrator”) provides the administrative services necessary for the Company to operate. Both the Investment Adviser and the Administrator are wholly owned subsidiaries of Carlyle Investment Management L.L.C. (“CIM”), a wholly owned subsidiary of The Carlyle Group Inc. “Carlyle” refers to The Carlyle Group Inc. and its affiliates and its consolidated subsidiaries (other than portfolio companies of its affiliated funds), a global investment firm publicly traded on the Nasdaq Global Select Market (“Nasdaq”) under the symbol “CG”. Refer to the sec.gov website for further information on Carlyle. TCG BDC SPV LLC (“SPV”) is a Delaware limited liability company that was formed on January 3, 2013. Prior to the termination of its senior secured credit facility on December 11, 2020, SPV invested in first and second lien senior secured loans. SPV is a wholly owned subsidiary of the Company and is consolidated in these unaudited consolidated financial statements commencing from the date of its formation. On June 26, 2015, the Company completed a $400,000 term debt securitization (the “2015-1 Debt Securitization”). The notes offered in the 2015-1 Debt Securitization (the “2015-1 Notes”) were issued by Carlyle Direct Lending CLO 2015-1R LLC (the “2015-1 Issuer”), a wholly owned and consolidated subsidiary of the Company. On August 30, 2018, the 2015-1 Issuer refinanced the 2015-1 Debt Securitization (the “2015-1 Debt Securitization Refinancing”) by redeeming in full the 2015-1 Notes and issuing $449,000 in new notes (the “2015-1R Notes”). The 2015-1R Notes were secured by a diversified portfolio of the 2015-1 Issuer consisting primarily of first and second lien senior secured loans. On July 2, 2024, the 2015-1 Issuer completed a refinancing of the 2015-1R Notes (the “2015-1R Refinancing”) by redeeming in full the 2015-1R Notes and issuing $410,000 in new notes and loans (the “2015-1N Debt” and together with the 2015-1R Notes, the “Securitizations"), which was inclusive of $30,000 in Class C-R Notes retained by the Company as of both July 2, 2024 and March 31, 2026. The Class C-R Notes are eliminated in consolidation. Refer to Note 9, Borrowings, to these unaudited consolidated financial statements for details. The 2015-1 Issuer is consolidated in these unaudited consolidated financial statements commencing from the date of its formation. On February 29, 2016, the Company and Credit Partners USA LLC (“Credit Partners”) entered into an amended and restated limited liability company agreement, as amended from time to time, to co-manage Middle Market Credit Fund, LLC (“Credit Fund”). Credit Fund primarily invests in first lien loans of middle market companies. Credit Fund is managed by a six-member board of managers, on which the Company and Credit Partners each have equal representation. The Company and Credit Partners each have 50% economic ownership of Credit Fund and have commitments to fund, from time to time, capital of up to $250,000 each as of March 31, 2026, increased from $175,000 each on February 11, 2026. Refer to Note 5, Middle Market Credit Fund, LLC, to these unaudited consolidated financial statements for details. On November 3, 2020, the Company and Cliffwater Corporate Lending Fund (“CCLF”), an investment vehicle managed by Cliffwater LLC, entered into a limited liability company agreement to co-manage Middle Market Credit Fund II, LLC (together with its wholly owned subsidiary Middle Market Credit Fund II SPV, LLC, “Credit Fund II”). Prior to the completion of the Credit Fund II Purchase (as defined below), Credit Fund II was managed by a four-member board of managers, on which the Company and CCLF each had equal representation, and the Company and CCLF held approximately 84.13% and 15.87% economic ownership of Credit Fund II, respectively. On February 10, 2025, the Company and CCLF entered into an amendment to the Credit Fund II limited liability company agreement (as so amended, the “Amended Credit Fund II LLCA”). Pursuant to the terms of the Amended Credit Fund II LLCA, Credit Fund II distributed $2,667 to CCLF, and the Company contributed $140,000 in cash to Credit Fund II. Such distributions and contributions were accounted for as a reduction in CCLF's membership interest based on the net asset value of Credit Fund II as of December 31, 2024. On February 11, 2025, the Company entered into a membership interest purchase agreement to purchase CCLF's remaining membership interest for cash at the net asset value thereof as of December 31, 2024 (the “Credit Fund II Purchase”), after which Credit Fund II became a wholly owned subsidiary of the Company and in connection therewith the CCLF board members resigned. See Note 6, Middle Market Credit Fund II, LLC, to these unaudited consolidated financial statements for details. Credit Fund II invests in senior secured loans of middle market companies. On May 5, 2020, the Company issued and sold 2,000,000 shares of cumulative convertible preferred stock, par value $0.01 per share (the “Preferred Stock”), to an affiliate of Carlyle in a private placement at a price of $25 per share. On March 27, 2025, in connection with the CSL III Merger (as defined below), the Company entered into a preferred stock exchange agreement (the “ Preferred Stock Exchange Agreement”) with CIM, the holder of record of shares of the Preferred Stock. Pursuant to the Preferred Stock Exchange Agreement, CIM surrendered all 2,000,000 outstanding shares of Preferred Stock in exchange for a number of shares of the Company’s common stock equal to the aggregate liquidation preference of the Preferred Stock divided by the net asset value per share of the Company as of March 25, 2025 (the “Preferred Stock Exchange”). Immediately prior to the Preferred Stock Exchange, the Company paid all accrued and unpaid dividends on the Preferred Stock. Following the Preferred Stock Exchange, the Preferred Stock was cancelled and is no longer outstanding. See Note 11, Net Assets, to these unaudited consolidated financial statements for additional information regarding the Preferred Stock and the Preferred Stock Exchange. On March 27, 2025, the Company completed its acquisition of Carlyle Secured Lending III (“CSL III”), a Maryland corporation, pursuant to the Agreement and Plan of Merger (as amended the “Merger Agreement”), dated as of August 2, 2024, by and among the Company, CSL III, Blue Fox Merger Sub Inc., a Maryland corporation and wholly owned subsidiary of the Company (“Merger Sub”), and, solely for the limited purposes set forth therein, CSL III Advisor, LLC, a Delaware limited liability company and investment adviser to CSL III (“CSL III Advisor”), and the Investment Adviser (together with CSL III Advisor, the “Advisors”), pursuant to which, Merger Sub first merged with and into CSL III, with CSL III continuing as the surviving company and as a wholly owned subsidiary of the Company (the “Merger”) and immediately thereafter, CSL III merged with and into the Company, with the Company continuing as the surviving company (together with the Merger, the “CSL III Merger”). Commencing on the completion of the CSL III Merger, all activity is consolidated in these unaudited consolidated financial statements. Refer to Note 16, Merger with CSL III, to these unaudited consolidated financial statements for additional information regarding the CSL III Merger. Carlyle Secured Lending III SPV, L.L.C. (the “CSL III SPV”) is a Delaware limited liability company formed on August 31, 2022, that became a wholly owned and consolidated subsidiary of the Company as a result of the CSL III Merger. CSL III SPV invests in first and second lien senior secured loans and is consolidated in these unaudited consolidated financial statements commencing on the completion of the CSL III Merger. On December 23, 2025, the Company and Carlyle Credit Solutions, Inc. (“CARS”), an affiliated BDC of the Company, together with certain affiliates of Sixth Street Partners, LLC, Sixth Street Lending Partners and Sixth Street Specialty Lending, Inc. (together, “Sixth Street”) (collectively with the Company and CARS, the “SCP Members”), entered into an amended and restated limited liability company agreement, as amended from time to time, to co-manage Structured Credit Partners JV, LLC (“Structured Credit Partners”). The SCP Members each hold 25% voting interests through non-economic Class A membership interests. Each Carlyle SCP Member’s initial capital commitment to Structured Credit Partners is up to $150,000, if and when requested, and the total initial capital commitments of all SCP Members to Structured Credit Partners are up to $600,000, if and when requested. Each SCP Member has equal representation on the board of managers of Structured Credit Partners. Refer to Note 7, Structured Credit Partners JV, LLC, to these unaudited consolidated financial statements for additional information regarding Structured Credit Partners. As a BDC, the Company is required to comply with certain regulatory requirements. As part of these requirements, the Company must not acquire any assets other than “qualifying assets” specified in the Investment Company Act unless, at the time the acquisition is made, at least 70% of its total assets are qualifying assets (with certain limited exceptions). To qualify as a RIC, the Company must, among other things, meet certain source-of-income and asset diversification requirements and timely distribute to its stockholders generally at least 90% of its investment company taxable income, as defined by the Code, for each year. Pursuant to this election, the Company generally does not have to pay corporate level taxes on any income that it distributes to stockholders, provided that the Company satisfies those requirements.

Carlyle Secured Lending, Inc. (together with its consolidated subsidiaries, “CGBD” or the “Company”) is a Maryland corporation formed on February 8, 2012, and structured as an externally managed, non-diversified closed-end investment company. The Company has elected to be regulated as a business development company (“BDC”) under the Investment Company Act of 1940, as amended (together with the rules and regulations promulgated thereunder, the “Investment Company Act”). In addition, the Company has elected to be treated, and intends to continue to comply with the requirements to qualify annually, as a regulated investment company (“RIC”) under Subchapter M of the Internal Revenue Code of 1986, as amended (together with the rules and regulations promulgated thereunder, the “Code”).

The Company’s investment objective is to generate current income and, to a lesser extent, capital appreciation primarily through assembling a portfolio of secured debt investments in U.S. middle market companies. The Company's core investment strategy focuses on lending to U.S. middle market companies, which the Company defines as companies with approximately $25.0 million or greater of earnings before interest, taxes, depreciation and amortization (“EBITDA”), supported by financial sponsors. This core strategy is opportunistically supplemented with differentiated and complementary lending and investing strategies, which take advantage of the broad capabilities of Carlyle’s Global Credit platform while offering risk-diversifying portfolio benefits. The Company seeks to achieve its objective primarily through direct origination of secured debt instruments, including first lien senior secured loans (which may include stand-alone first lien loans, first lien/last out loans and “unitranche” loans) and second lien senior secured loans (collectively, “Middle Market Senior Loans”), with a minority of its assets invested in higher yielding investments (which may include unsecured debt, subordinated debt and investments in equities and structured products). The Middle Market Senior Loans are generally made to private U.S. middle market companies that are, in many cases, controlled by private equity firms.

The Company invests primarily in loans to middle market companies whose debt has been rated below investment grade, or would likely be rated below investment grade if it was rated. These securities, which are often referred to as “junk,” have predominately speculative characteristics with respect to the issuer’s capacity to pay interest and repay principal.

On May 2, 2013, the Company completed its initial closing of capital commitments (the “Initial Closing”) and subsequently commenced substantial investment operations. Effective March 15, 2017, the Company changed its name from “Carlyle GMS Finance, Inc.” to “TCG BDC, Inc.” On June 19, 2017, the Company closed its initial public offering, issuing 9,454,200 shares of its common stock (including shares issued pursuant to the exercise of the underwriters’ over-allotment option on July 5, 2017) at a public offering price of $18.50 per share. Net of underwriting costs, the Company received cash proceeds of $169,488. Shares of common stock of the Company began trading on the Nasdaq Global Select Market under the symbol “CGBD” on June 14, 2017. Effective April 12, 2022, the Company changed its name from “TCG BDC, Inc.” to “Carlyle Secured Lending, Inc.”

The Company is externally managed by its investment adviser, Carlyle Global Credit Investment Management L.L.C. (the “Investment Adviser”), a wholly owned subsidiary of The Carlyle Group Inc. and an investment adviser registered under the Investment Advisers Act of 1940, as amended. Carlyle Global Credit Administration L.L.C. (the “Administrator”) provides the administrative services necessary for the Company to operate. Both the Investment Adviser and the Administrator are wholly owned subsidiaries of Carlyle Investment Management L.L.C. (“CIM”), a wholly owned subsidiary of The Carlyle Group Inc. “Carlyle” refers to The Carlyle Group Inc. and its affiliates and its consolidated subsidiaries (other than portfolio companies of its affiliated funds), a global investment firm publicly traded on the Nasdaq Global Select Market (“Nasdaq”) under the symbol “CG”. Refer to the sec.gov website for further information on Carlyle.

TCG BDC SPV LLC (“SPV”) is a Delaware limited liability company that was formed on January 3, 2013. Prior to the termination of its senior secured credit facility on December 11, 2020, SPV invested in first and second lien senior secured loans. SPV is a wholly owned subsidiary of the Company and is consolidated in these unaudited consolidated financial statements commencing from the date of its formation.

On June 26, 2015, the Company completed a $400,000 term debt securitization (the “2015-1 Debt Securitization”). The notes offered in the 2015-1 Debt Securitization (the “2015-1 Notes”) were issued by Carlyle Direct Lending CLO 2015-1R LLC (the “2015-1 Issuer”), a wholly owned and consolidated subsidiary of the Company. On August 30, 2018, the 2015-1 Issuer refinanced the 2015-1 Debt Securitization (the “2015-1 Debt Securitization Refinancing”) by redeeming in full the

2015-1 Notes and issuing $449,000 in new notes (the “2015-1R Notes”). The 2015-1R Notes were secured by a diversified portfolio of the 2015-1 Issuer consisting primarily of first and second lien senior secured loans. On July 2, 2024, the 2015-1 Issuer completed a refinancing of the 2015-1R Notes (the “2015-1R Refinancing”) by redeeming in full the 2015-1R Notes and issuing $410,000 in new notes and loans (the “2015-1N Debt” and together with the 2015-1R Notes, the “Securitizations"), which was inclusive of $30,000 in Class C-R Notes retained by the Company as of both July 2, 2024 and March 31, 2026. The Class C-R Notes are eliminated in consolidation. Refer to Note 9, Borrowings, to these unaudited consolidated financial statements for details. The 2015-1 Issuer is consolidated in these unaudited consolidated financial statements commencing from the date of its formation.

On February 29, 2016, the Company and Credit Partners USA LLC (“Credit Partners”) entered into an amended and restated limited liability company agreement, as amended from time to time, to co-manage Middle Market Credit Fund, LLC (“Credit Fund”). Credit Fund primarily invests in first lien loans of middle market companies. Credit Fund is managed by a six-member board of managers, on which the Company and Credit Partners each have equal representation. The Company and Credit Partners each have 50% economic ownership of Credit Fund and have commitments to fund, from time to time, capital of up to $250,000 each as of March 31, 2026, increased from $175,000 each on February 11, 2026. Refer to Note 5, Middle Market Credit Fund, LLC, to these unaudited consolidated financial statements for details.

On November 3, 2020, the Company and Cliffwater Corporate Lending Fund (“CCLF”), an investment vehicle managed by Cliffwater LLC, entered into a limited liability company agreement to co-manage Middle Market Credit Fund II, LLC (together with its wholly owned subsidiary Middle Market Credit Fund II SPV, LLC, “Credit Fund II”). Prior to the completion of the Credit Fund II Purchase (as defined below), Credit Fund II was managed by a four-member board of managers, on which the Company and CCLF each had equal representation, and the Company and CCLF held approximately 84.13% and 15.87% economic ownership of Credit Fund II, respectively.

On February 10, 2025, the Company and CCLF entered into an amendment to the Credit Fund II limited liability company agreement (as so amended, the “Amended Credit Fund II LLCA”). Pursuant to the terms of the Amended Credit Fund II LLCA, Credit Fund II distributed $2,667 to CCLF, and the Company contributed $140,000 in cash to Credit Fund II. Such distributions and contributions were accounted for as a reduction in CCLF's membership interest based on the net asset value of Credit Fund II as of December 31, 2024. On February 11, 2025, the Company entered into a membership interest purchase agreement to purchase CCLF's remaining membership interest for cash at the net asset value thereof as of December 31, 2024 (the “Credit Fund II Purchase”), after which Credit Fund II became a wholly owned subsidiary of the Company and in connection therewith the CCLF board members resigned. See Note 6, Middle Market Credit Fund II, LLC, to these unaudited consolidated financial statements for details. Credit Fund II invests in senior secured loans of middle market companies.

On May 5, 2020, the Company issued and sold 2,000,000 shares of cumulative convertible preferred stock, par value $0.01 per share (the “Preferred Stock”), to an affiliate of Carlyle in a private placement at a price of $25 per share. On March 27, 2025, in connection with the CSL III Merger (as defined below), the Company entered into a preferred stock exchange agreement (the “ Preferred Stock Exchange Agreement”) with CIM, the holder of record of shares of the Preferred Stock. Pursuant to the Preferred Stock Exchange Agreement, CIM surrendered all 2,000,000 outstanding shares of Preferred Stock in exchange for a number of shares of the Company’s common stock equal to the aggregate liquidation preference of the Preferred Stock divided by the net asset value per share of the Company as of March 25, 2025 (the “Preferred Stock Exchange”). Immediately prior to the Preferred Stock Exchange, the Company paid all accrued and unpaid dividends on the Preferred Stock. Following the Preferred Stock Exchange, the Preferred Stock was cancelled and is no longer outstanding. See Note 11, Net Assets, to these unaudited consolidated financial statements for additional information regarding the Preferred Stock and the Preferred Stock Exchange.

On March 27, 2025, the Company completed its acquisition of Carlyle Secured Lending III (“CSL III”), a Maryland corporation, pursuant to the Agreement and Plan of Merger (as amended the “Merger Agreement”), dated as of August 2, 2024, by and among the Company, CSL III, Blue Fox Merger Sub Inc., a Maryland corporation and wholly owned subsidiary of the Company (“Merger Sub”), and, solely for the limited purposes set forth therein, CSL III Advisor, LLC, a Delaware limited liability company and investment adviser to CSL III (“CSL III Advisor”), and the Investment Adviser (together with CSL III Advisor, the “Advisors”), pursuant to which, Merger Sub first merged with and into CSL III, with CSL III continuing as the surviving company and as a wholly owned subsidiary of the Company (the “Merger”) and immediately thereafter, CSL III merged with and into the Company, with the Company continuing as the surviving company (together with the Merger, the “CSL III Merger”). Commencing on the completion of the CSL III Merger, all activity is consolidated in these unaudited consolidated financial statements. Refer to Note 16, Merger with CSL III, to these unaudited consolidated financial statements for additional information regarding the CSL III Merger.

Carlyle Secured Lending III SPV, L.L.C. (the “CSL III SPV”) is a Delaware limited liability company formed on August 31, 2022, that became a wholly owned and consolidated subsidiary of the Company as a result of the CSL III Merger. CSL III SPV invests in first and second lien senior secured loans and is consolidated in these unaudited consolidated financial statements commencing on the completion of the CSL III Merger.

On December 23, 2025, the Company and Carlyle Credit Solutions, Inc. (“CARS”), an affiliated BDC of the Company, together with certain affiliates of Sixth Street Partners, LLC, Sixth Street Lending Partners and Sixth Street Specialty Lending, Inc. (together, “Sixth Street”) (collectively with the Company and CARS, the “SCP Members”), entered into an amended and restated limited liability company agreement, as amended from time to time, to co-manage Structured Credit Partners JV, LLC (“Structured Credit Partners”). The SCP Members each hold 25% voting interests through non-economic Class A membership interests. Each Carlyle SCP Member’s initial capital commitment to Structured Credit Partners is up to $150,000, if and when requested, and the total initial capital commitments of all SCP Members to Structured Credit Partners are up to $600,000, if and when requested. Each SCP Member has equal representation on the board of managers of Structured Credit Partners. Refer to Note 7, Structured Credit Partners JV, LLC, to these unaudited consolidated financial statements for additional information regarding Structured Credit Partners.

As a BDC, the Company is required to comply with certain regulatory requirements. As part of these requirements, the Company must not acquire any assets other than “qualifying assets” specified in the Investment Company Act unless, at the time the acquisition is made, at least 70% of its total assets are qualifying assets (with certain limited exceptions).

To qualify as a RIC, the Company must, among other things, meet certain source-of-income and asset diversification requirements and timely distribute to its stockholders generally at least 90% of its investment company taxable income, as defined by the Code, for each year. Pursuant to this election, the Company generally does not have to pay corporate level taxes on any income that it distributes to stockholders, provided that the Company satisfies those requirements.