SCHEDULE 13D

CUSIP No.

83418M103

Name of reporting person

KTR Management Company, LLC

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

TEXAS

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 4,114,783.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,114,783.00

Aggregate amount beneficially owned by each reporting person

4,114,783.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

6.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

(1) Represents 4,114,783 shares of Class B common stock, par value $0.00 per share ("Class B common stock"), of Solaris Energy Infrastructure, Inc., a Delaware corporation (the "Issuer"), and an equal number of units ("Solaris LLC Units") of Solaris Energy Infrastructure, LLC, a Delaware limited liability company ("Solaris LLC") and operating subsidiary of the Issuer, held by KTR Management Company, LLC, a Texas limited liability company ("KTR"). Shares of the Issuer's Class B common stock (together with a corresponding number of Solaris LLC Units) are exchangeable for shares of the Issuer's Class A common stock, par value $0.01 per share ("Class A common stock," and together with the Class B common stock, "Common Stock"), on a one-for-one basis. (2) The percentage calculation is based on an aggregate of 67,582,883 shares of Common Stock, which is comprised of (a) 44,603,740 shares of the Class A common stock and (b) 22,979,143 shares of the Class B common stock as of July 30, 2025, as reported in the Issuer's most recent Quarterly Report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (the "SEC") on August 1, 2025.

SCHEDULE 13D

CUSIP No.

83418M103

Name of reporting person

John Tuma

Check the appropriate box if a member of a Group (See Instructions)

(a)

(b)

SEC use only

Source of funds (See Instructions)

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

Checkbox not checked

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 4,114,783.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 4,114,783.00

Aggregate amount beneficially owned by each reporting person

4,114,783.00

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in Row (11)

6.1 %

Type of Reporting Person (See Instructions)

Comment for Type of Reporting Person:

(1) Represents 4,114,783 shares of Class B common stock, par value $0.00 per share ("Class B common stock") of Solaris Energy Infrastructure, Inc., a Delaware corporation (the "Issuer"), and an equal number of units ("Solaris LLC Units") of Solaris Energy Infrastructure, LLC, a Delaware limited liability company and operating subsidiary of the Issuer ("Solaris LLC"), held by KTR Management Company, LLC, a Texas limited liability company ("KTR"). Shares of Class B common stock (together with a corresponding number of Solaris LLC Units) are exchangeable for shares of the Issuer's Class A Common Stock, par value $0.01 per share ("Class A common stock," and together with shares of Class B common stock, the "Common Stock"), on a one-for-one basis. (2) The percentage calculation is based on an aggregate of 67,582,883 shares of Common Stock, which is comprised of (a) 44,603,740 shares of the Class A common stock and (b) 22,979,143 shares of the Class B common stock as of July 30, 2025, as reported in the Issuer's most recent Quarterly Report on Form 10-Q, filed with the U.S. Securities and Exchange Commission (the "SEC") on August 1, 2025.

SCHEDULE 13D

Item 1.

Security and Issuer

(a)

Title of Class of Securities:

Class A Common Stock, par value $0.01 per share

(b)

Name of Issuer:

Solaris Energy Infrastructure, Inc.

(c)

Address of Issuer's Principal Executive Offices:

9651 Katy Freeway, Suite 300, Houston, TEXAS , 77024.

Item 3.

Source and Amount of Funds or Other Consideration

On August 6, 2025, KTR (i) converted 4,000,000 shares of the Issuer's Class B common stock and an equal number of Solaris LLC Units into 4,000,000 shares of the Issuer's Class A common stock in accordance with the terms of the Second Amended and Restated Limited Liability Company Agreement of Solaris LLC, dated as of May 11, 2017, as amended from time to time, pursuant to which Solaris LLC Units (together with a corresponding number of shares of the Issuer's Class B common stock) are exchangeable from time to time for shares of the Issuer's Class A common stock, and (ii) sold 4,000,000 shares of the Issuer's Class A common stock at a price per share of $29.50.

Item 5.

Interest in Securities of the Issuer

(a)

(a) - (b) The aggregate number and percentage of shares of Common Stock beneficially owned by each of the Reporting Persons and, for such Reporting Persons, the number of shares as to which there is sole power to vote or to direct the vote, shared power to vote or to direct the vote, sole power to dispose or to direct the disposition, or shared power to dispose or to direct the disposition are set forth on rows 7 through 11 and row 13 of the cover pages of this Schedule 13D/A and are incorporated herein by reference.

(c)

Except as set forth in this Schedule 13D/A, the Reporting Persons have not effected any transactions in the Common Stock during the past 60 days.

(d)

No person other than the Reporting Persons is known to have the right to receive, or the power to direct the receipt of dividends from, or proceeds from the sale of, the Issuer's securities beneficially owned by the Reporting Persons.

(e)

Not applicable.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

KTR Management Company, LLC

Signature:	/s/ John Tuma
Name/Title:	John Tuma/President
Date:	08/08/2025

John Tuma

Signature:	/s/ John Tuma
Name/Title:	John Tuma
Date:	08/08/2025