UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of report (Date of earliest event reported): December 0129, 2025

Stonepeak-Plus Infrastructure Fund LP

(Exact Name of Registrant as Specified in Its Charter)

Delaware

000-56711

33-1582934

(State or Other Jurisdiction of Incorporation or Organization)

Commission file number

(IRS Employer Identification No.)

55 Hudson Yards550 W 34th Street, 48th FloorNew York, NY

10001

55 Hudson Yards550 W 34th StreetNew York, NY

10001

(Address of principal executive offices)

(Zip Code)

(212) 907-5100

(Registrant’s telephone number, including area code)

N/A

(Former Name, Former Address and Former Fiscal Year if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


☐						Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐						Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐						Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐						Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading Symbol(s)

Name of each exchange on which registered

None.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). Yes ☒ No ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 3.02. Unregistered Sales of Equity Securities.

On ~~November~~December 31, 2025, Stonepeak-Plus Infrastructure Fund LP (the “Fund”) sold unregistered limited partnership units (the “Units”) to third party investors for aggregate consideration of approximately $3029,~~510~~723,000.(1) The following table provides details on the Units sold by the Fund to third party investors (rounding to the nearest whole number):

Number of Units Sold(2)

Aggregate Consideration

Class A-1a

~~869~~922,~~091~~106

$2527,~~915~~575,000

Class I-1

~~152~~71,~~395~~005

$42,~~595~~148,000

(1) The Fund invests generally alongside another vehicle that is managed by Stonepeak-Plus Infrastructure Fund Advisors LLC, its investment advisor (the “Investment Advisor”), is organized outside of the United States, and has substantially similar investment objectives and strategies with the Fund (the Fund and such other vehicle, together, “SP+ INFRA”).

(2) The number of Units sold by the Fund was finalized on December 129, 2025, following the calculation of the Fund’s transactional net asset value (“Transactional NAV”) per Unit for each class of the Fund as of ~~October~~November 3130, 2025. The purchase price for each of Class A-1a and Class I-1 Units of the Fund as of ~~November~~December 31, 2025 is the Transactional NAV per Unit for the respective class as of ~~October~~November 3130, 2025. See Item 8.01 below for more information on the Fund’s Transactional NAV.

Additionally, on December 23, 2025, the Fund issued to Stonepeak Investment Holdings II LP, an affiliate of the Investment Advisor, Class X Units at the Transactional NAV per Class X Unit as of November 30, 2025 in exchange for the contribution to the Fund of approximately $199,985,928 of ownership interests in (i) Princeton Digital Group, a pan Asia data center platform headquartered in Singapore and (ii) Forgital Group, a manufacturer of advanced forged and machine-finished components for aerospace and industrial end markets (the “Warehoused Investments”). The Transactional NAV per Class X Unit as of November 30, 2025 was finalized at $30.63 on December 29, 2025, and the Fund issued 6,529,118 Class X Units in exchange for the Warehoused Investments.

The offer and sale of the Units were made as part of the Fund’s continuous private offering and were exempt from the registration provisions of the Securities Act of 1933, as amended, pursuant to Section 4(a)(2) and Regulation D thereunder. Class A-1a and Class I-1 Units were sold to third-party investors, including through Stonepeak-Plus Infrastructure Fund (TE) LP, a Delaware limited partnership, for certain investors with particular tax characteristics, such as tax-exempt investors and non-U.S. investors.

OnIn ~~November~~December 3, 2025, SP+ INFRA (inclusive of the Fund) sold interests for aggregate consideration of approximately $41238,~~396~~462,~~234~~504 (which consists of $38,476,576 of cash and $199,985,928 of the Warehoused Investments). Since inception on May 2, 2025, through the date of filing of this Current Report on Form 8-K, SP+ INFRA (inclusive of the Fund) has sold interests for aggregate ~~cash~~ consideration of approximately $~~727~~965,~~487~~949,~~303~~807 (which consists of $765,963,879 of cash and $199,985,928 of the Warehoused Investments) as part of its continuous private offering. The amounts disclosed herein do not take into account any Unit redemptions or repurchases by the Fund or Units issued pursuant to any dividend reinvestment plan.

Item 8.01. Other Events.

Transactional Net Asset Value

The Transactional NAV per Unit for each class of the Fund as of ~~October~~November 3130, 2025, is as follows:

						Transactional NAV
						as of October 31, 2025
						as of November 30, 2025
Class A-1a						$29.8290
Class A-1b						$29.8493
Class A-1c						$29.8595
Class F-1						$29.8595
Class I-1						$30.1525
Class X						$30.5163

The Fund calculates Transactional NAV for purposes of establishing the price at which transactions in the Fund’s Units are made. A description of the Fund’s valuation process was included under “Item 9. Market Price of and Dividends on the Registrant’s Common Equity and Related Unitholder Matters” of the Fund’s Registration Statement on Form 10 filed on January 31, 2025. Transactional NAV is based on the month-end values of the Fund’s investments, the addition of the value of any other assets (such as cash on hand), and the deduction of the Fund’s liabilities, including certain fees and expenses, in accordance with the Fund’s valuation policy.

December 2025 Distributions

On December 1, 2025, the Fund declared distributions for each class of its Units in the amount per Unit set forth below:

						Net Distribution
Class A-1a						$0.2628
Class A-1b						$0.2785
Class A-1c						$0.3000
Class F-1						$0.3000
Class I-1						$0.3000
Class X						$0.3000

The distributions for each class of Units are payable to unitholders of record at the close of business on October 31, 2025, and will be paid on or about December 9, 2025. These distributions will be paid in cash or reinvested in Units for unitholders participating in the Fund’s distribution reinvestment plan.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Stonepeak-Plus Infrastructure Fund LP

Date: December 05, 2025

By:

/s/ Cyrus Gentry

Date: January 05, 2026

By:

/s/ Cyrus Gentry

Cyrus Gentry

Chief Executive Officer

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