ORGANIZATION	12 Months Ended
Dec. 31, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
ORGANIZATION	(1) ORGANIZATION North Haven Private Income Fund LLC (the “Company”) is a non-diversified, externally managed specialty finance company focused on lending to middle-market companies. The Company has elected to be regulated as a business development company (“BDC”) under the 1940 Act. In addition, for US federal income tax purposes, the Company has elected to be treated, and intends 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 (the “Code”). The Company is not a subsidiary of, or consolidated with, Morgan Stanley. The Company was formed as a Delaware limited liability company on March 4, 2021 and commenced investment operations on February 1, 2022. The Company is externally managed by MS Capital Partners Adviser Inc., an indirect wholly owned subsidiary of Morgan Stanley (the “Adviser” or “Investment Adviser”). The Company’s investment objective is to achieve attractive risk-adjusted returns via current income and, to a lesser extent, capital appreciation by investing primarily in directly originated senior secured term loans issued by U.S. middle-market companies in which private equity sponsors have a controlling equity stake in the portfolio company. The Company is conducting a continuous private offering of its units in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”). The Company has offered and currently intends to offer one class of units, Class S Units (the “Units”) in its continuous private offering. On July 15, 2024, the Company acquired SL Investment Corp. (“SLIC”) pursuant to that certain Agreement and Plan of Merger (the “Merger Agreement”), dated as of May 28, 2024, by and among SLIC, the Company, Cobalt Merger Sub, Inc. (“Merger Sub”), a wholly-owned subsidiary of the Company, and the Adviser. Pursuant to the Merger Agreement, SLIC was merged with and into the Company in a two-step transaction with the Company as the surviving company (the “SLIC Acquisition”). See Note 12 “SLIC Acquisition.”

ORGANIZATION

12 Months Ended

Dec. 31, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

(1) ORGANIZATION

North Haven Private Income Fund LLC (the “Company”) is a non-diversified, externally managed specialty finance company focused on lending to middle-market companies. The Company has elected to be regulated as a business development company (“BDC”) under the 1940 Act. In addition, for US federal income tax purposes, the Company has elected to be treated, and intends 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 (the “Code”). The Company is not a subsidiary of, or consolidated with, Morgan Stanley.

The Company was formed as a Delaware limited liability company on March 4, 2021 and commenced investment operations on February 1, 2022. The Company is externally managed by MS Capital Partners Adviser Inc., an indirect wholly owned subsidiary of Morgan Stanley (the “Adviser” or “Investment Adviser”).

The Company’s investment objective is to achieve attractive risk-adjusted returns via current income and, to a lesser extent, capital appreciation by investing primarily in directly originated senior secured term loans issued by U.S. middle-market companies in which private equity sponsors have a controlling equity stake in the portfolio company.

The Company is conducting a continuous private offering of its units in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”). The Company has offered and currently intends to offer one class of units, Class S Units (the “Units”) in its continuous private offering.

On July 15, 2024, the Company acquired SL Investment Corp. (“SLIC”) pursuant to that certain Agreement and Plan of Merger (the “Merger Agreement”), dated as of May 28, 2024, by and among SLIC, the Company, Cobalt Merger Sub, Inc. (“Merger Sub”), a wholly-owned subsidiary of the Company, and the Adviser. Pursuant to the Merger Agreement, SLIC was merged with and into the Company in a two-step transaction with the Company as the surviving company (the “SLIC Acquisition”). See Note 12 “SLIC Acquisition.”