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): October 6, 2025

Solaris Energy Infrastructure, Inc.

(Exact name of registrant as specified in its charter)


Delaware	001-38090	81-5223109
(State or other jurisdiction of incorporation)	(Commission File Number)	(I.R.S. Employer Identification No.)

9651 Katy Freeway, Suite 300

Houston, Texas 77024

(address of principal executive offices) (zip code)

(281) 501-3070

(Registrant’s telephone number, including area code)

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

☐	Written communication 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-commencements communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))


Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Class A Common Stock, $0.01 par value	SEI	New York Stock Exchange
		NYSE Texas, Inc.

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 1.01.

Entry into a Material Definitive Agreement.

Revolving Credit Facility Amendment

On October 6, 2025, we entered into the third amendment (the “Revolver Amendment”) to our loan, security, and guaranty agreement (the “Revolving Credit Facility”) with Bank of America, N.A. as agent and the lenders party thereto. The Revolver Amendment permits, among other things, the issuance of certain convertible debt and related derivative securities.

Item 2.03.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The information provided under Item 1.01 of this Current Report on Form 8-K under the subheader “Revolving Credit Facility Amendment” is incorporated into this Item 2.03 by reference.

Item 8.01.

Other Events.

Also, on October 6, 2025, the Company provided certain updated disclosures, as set forth below.

***

Solaris Power Solutions Turbine Expansion Opportunity

We have identified an opportunity to purchase approximately 80 MW of immediately available turbine capacity new from a manufacturer that, when combined with our currently available on-order capacity scheduled for delivery in the second half of 2026, will increase available turbine capacity to approximately 500 MW.

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.


	SOLARIS ENERGY INFRASTRUCTURE, INC.
Date: October 6, 2025

	By:	/s/ Kyle S. Ramachandran
	Name:	Kyle S. Ramachandran
	Title:	President and Chief Financial Officer

Solaris Energy Infrastructure, Inc. 8-K