Class I common shares of beneficial interest, par value $0.001 per share

TPG Twin Brook Capital Income Fund

245 Park Avenue, New York, NY, 10167

This Amendment amends and restates the second paragraph of Item 2(a) of the Original Schedule 13D in its entirety as set forth below: "TPG GP A exercises direct or indirect control over entities that collectively hold 100% of the shares of Class B common stock (which represents a majority of the combined voting power of the common stock) of TPG Inc., a Delaware corporation, which is the sole member of TPG GPCo, LLC, a Delaware limited liability company, which is the sole member of TPG Holdings II-A, LLC, a Delaware limited liability company, which is the general partner of TPG Operating Group II, L.P., a Delaware limited partnership, which is the sole member of AG GP, which is the general partner of Angelo Gordon, which directly holds 161,736.426 Common Shares and is the (i) sole member of AGTB BDC Holdings GP LLC, a Delaware limited liability company, which is the general partner of AGTB BDC Holdings, L.P., a Cayman limited partnership ("BDC Holdings"), which directly holds 21,187,317.535 Common Shares; and (ii) investment advisor to BDC Holdings."

This Amendment amends and restates Item 2(b) of the Original Schedule 13D in its entirety as set forth below: "The business address of each Reporting Person is c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. The following list includes the name, residence or business address and present principal occupation or employment of each director, executive officer and controlling person of TPG GP A (the "TPG GP A Officers"). All addresses are c/o TPG Inc., 301 Commerce Street, Suite 3300, Fort Worth, Texas 76102. James G. Coulter (Executive Chairman) Jon Winkelried (Chief Executive Officer) Jack Weingart (Chief Financial Officer) Todd Sisitsky (President) Anilu Vazquez-Ubarri (Chief Operating Officer) Jennifer L. Chu (General Counsel) Joann Harris (Chief Compliance Officer) Martin Davidson (Chief Accounting Officer) Steven A. Willmann (Treasurer) Jean-Baptiste Garcia (Vice President) Matthew White (Vice President) The following list includes the name, residence or business address and present principal occupation or employment of each director, executive officer and controlling person of Angelo Gordon / AG GP (the "AG GP Officers"). All addresses are 245 Park Avenue, 26th Floor, New York, New York 10167. Adam Schwartz (Managing Partner) Frank Stadelmaier (Chief Operating Officer) Brian Sigman (Chief Financial Officer) Christopher Moore (General Counsel) Martin Davidson (Chief Accounting Officer) Joann Harris (Chief Compliance Officer) Steven Willmann (Treasurer) Jean-Baptiste Garcia (Vice President) Matthew White (Vice President)"

This Amendment amends and restates the second paragraph of Item 5(a)-(b) of the Original Schedule 13D in its entirety as set forth below: "The following sentence is based on a total of 108,739,708.687 Common Shares outstanding as of the date of this report, as disclosed by the Issuer to the Reporting Persons. Pursuant to Rule 13d-3 under the Act, the Reporting Persons may be deemed to beneficially own 21,349,053.961 Common Shares, which constitutes approximately 19.6% of the outstanding Common Shares."

See response to Item 5(a) above.

This Amendment amends Item 5(c) of the Original Schedule 13D to include the following: "Effective on June 1, 2026, BDC Holdings purchased 3,966,554.017 Common Shares at $25.2108 per Common Share (the "June 2026 Purchase Price"). The June 2026 Purchase Price was equal to the net asset value per Common Share as of May 31, 2026, as determined by the Issuer on June 29, 2026. In addition, BDC Holdings acquired an aggregate of 18,463.365 Common Shares in the past 60 days as a result of the DRIP. Except as otherwise reported herein, none of the Reporting Persons nor, to the best knowledge of the Reporting Persons, without independent verification, any person named in Item 2 hereof, has effected any transaction in the Common Shares during the past 60 days."