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~~January 292, ~~2025~~2026

Blackstone Infrastructure Strategies L.P.

(Exact name of Registrant as specified in its charter)

Delaware	000-56672	~~No.~~ 99-4067586
(State or other jurisdictionof incorporation)	(Commission File Number)	(I.R.S. EmployerIdentification No.)
(State or Other Jurisdictionof Incorporation)	(Commission File Number)	(IRS. EmployerIdentification No.)
345 Park Avenue New York, New York 10154
(Address of principal executive offices and zip code)

~~Registrant’s~~345 ~~telephone~~Park ~~number~~Avenue New York, ~~including~~New ~~area~~York ~~code:~~10154 (Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: (212) 583-5000

Not Applicable

(Former name or former address, 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: None


Title of each class		Trading Symbol(s)		Name of each exchange on which registered

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).

Emerging growth company ☒

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 35.02. ~~Unregistered~~Departure ~~Sales~~of Directors or Certain Officers; Election of ~~Equity~~Directors; ~~Securities~~Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.

On ~~December~~January 12, ~~2025~~2026, Blackstone Infrastructure Strategies Associates L.P., (the ~~“Fund”)~~general ~~sold~~partner ~~unregistered~~of ~~limited~~Blackstone ~~partnership~~Infrastructure ~~units~~Strategies L.P. (the “~~Units~~Fund”), ~~for~~appointed ~~aggregate~~Matthew ~~consideration~~JK Runkle as President of ~~approximately~~the ~~$193~~Fund, effective immediately.2 ~~million(1)~~Mr. Runkle ~~The~~will ~~following~~continue ~~table~~to ~~details~~serve as the ~~Units~~Fund’s ~~sold~~Head byof Acquisitions. Concurrent with this appointment and effective immediately, Kurt Summers departed his role as the Fund:’s President. Mr. Summers’ departure was not related to the Company’s financial or operating results or to any disagreements or concerns regarding the Company’s financial or reporting practices.

	Number of Units Sold(2)		Consideration
Class I		4,916,652	$	134,445,154
Class S		2,070,609	$	56,171,678
Class D		94,781	$	2,585,000

Matthew JK Runkle, 47, has served as the Head of Acquisitions of the Fund since March 2025. He is also a Senior Managing Director and Head of Power and Midstream within Blackstone’s Infrastructure group. Since joining Blackstone in 2017, Mr. Runkle has been involved in the execution of Blackstone investments, including Invenergy Renewables, a partnership with NextEra, Cheniere Energy Partners, and Tallgrass Energy. Before joining Blackstone, Mr. Runkle spent 15 years at ArcLight Capital Partners, a private equity firm focused on energy infrastructure investments. While at ArcLight, Mr. Runkle sourced, executed, and actively managed investments in assets and companies across the power and midstream sectors. Prior to that, Mr. Runkle began his career at The NorthBridge Group as an Analyst, where he focused on corporate strategy for vertically integrated utilities. Mr. Runkle serves as a director of Tallgrass Energy and Cheniere Energy Partners, L.P. Mr. Runkle previously served as a director of Cheniere Energy, Inc. from 2023 to 2024. Mr. Runkle received a B.S. in Geology and Geophysics from Yale University.

~~(1)~~Mr. Runkle ~~The~~is ~~Fund~~a ~~invests~~Senior ~~alongside~~Managing ~~other~~Director ~~Blackstone-managed~~in ~~vehicles~~the ~~with~~Infrastructure ~~substantially~~group ~~similar~~of ~~investment~~Blackstone ~~objectives~~ and ~~strategies~~was ~~that,~~requested ~~together~~by ~~with~~Blackstone to serve as the Fund,’s ~~collectively~~President. ~~form~~There ~~BXINFRA~~are no family relationships between Mr. Runkle Onand ~~December~~any 1,director ~~2025,~~or ~~BXINFRA~~executive ~~(inclusive~~officer of the Fund) ~~issued~~and ~~interests~~there ~~for~~are ~~aggregate~~no ~~consideration~~transactions between Mr. Runkle and the Fund that would be required to be reported under Item 404(a) of ~~approximately~~Regulation ~~$211~~S-K.2 ~~million.~~

(2) The number of Units sold by the Fund was finalized on December 29, 2025, following the calculation of the Fund’s transactional net asset value (“Transactional NAV”) as of November 30, 2025. See Item 7.01 below for more information on the Fund’s Transactional NAV.

The offer and sale of the Units were made as part of the Fund’s continuous private offering to investors that are both (a) accredited investors (as defined in Regulation D under the Securities Act of 1933, as amended (the “Securities Act”)) and (b) qualified purchasers (as defined in the Investment Company Act of 1940, as amended, and the rules thereunder) and were exempt from the registration provisions of the Securities Act, pursuant to Section 4(a)(2) and Regulation D thereunder. Units were sold to third-party investors, including through Blackstone Infrastructure Strategies (TE) L.P., a Delaware limited partnership for certain investors with particular tax characteristics, such as tax-exempt investors and non-U.S. investors.

Item 7.01 Regulation FD Disclosure

Transactional Net Asset Value

The Transactional NAV per Unit for each class of the Fund as of November 30, 2025 is as follows:

	Transactional NAV as ofNovember 30, 2025
Class I	$	27.34
Class S	$	27.13
Class D	$	27.27

As of November 30, 2025, BXINFRA’s aggregate Transactional NAV was approximately $3.6 billion.

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 “Part II, Item 5. Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities—Calculation of Net Asset Value” of the Fund’s Annual Report on Form 10-K filed on March 7, 2025. Transactional NAV is based on the month-end values of the Fund’s investments and other assets and the deduction of any liabilities, including certain fees and expenses, in all cases as determined in accordance with the Fund’s valuation policy that has been approved by the Fund’s board of directors. Organization and offering expenses advanced on the Fund’s behalf by the Fund’s investment manager are recognized as a reduction to Transactional NAV ratably over 60 months beginning on January 1, 2026, and unitholder servicing fees, as applicable, are recognized as a reduction to

Transactional NAV on a monthly basis as such fees are accrued. Certain contingent tax liabilities may not be recognized as a reduction to Transactional NAV if the Fund’s general partner reasonably expects such liabilities will not be recognized upon divestment of the underlying investment. Transactional NAV per Unit may differ from the Fund’s net asset value as determined in accordance with accounting principles generally accepted in the United States of America.

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 hereunto duly authorized.

	BLACKSTONE INFRASTRUCTURE STRATEGIES L.P.
Date: December 29, 2025	By:	/s/ Christopher Striano
Date: January 2, 2026
	Name:	Christopher Striano
	By:	/s/ Kate O’Neil
	Title:	Chief Financial Officer
	Name:	Kate O’Neil
	Title:	Chief Legal Officer

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