BlackRock (NYSE: SEI) reports 8.0M Solaris Energy shares, 13.1% ownership stake

Rhea-AI Filing Summary

BlackRock, Inc., a Delaware company, reports beneficial ownership of 8,024,851 shares of Solaris Energy Infrastructure, Inc. Class A Stock, representing 13.1% of the class. BlackRock has sole voting power over 7,935,602 shares and sole dispositive power over 8,024,851 shares, with no shared voting or dispositive power.

The filing notes that these holdings reflect securities beneficially owned, or deemed beneficially owned, by certain BlackRock business units. It also states that iShares Core S&P Small-Cap ETF has an interest in Solaris common stock exceeding five percent of total outstanding common stock. This disclosure is made in Amendment No. 11 to a Schedule 13G.

Key Figures

Beneficial ownership: 8,024,851 shares Percent of class: 13.1% Sole voting power: 7,935,602 shares +4 more

7 metrics

Beneficial ownership 8,024,851 shares Shares of Solaris Energy Infrastructure, Inc. Class A Stock beneficially owned by BlackRock, Inc.

Percent of class 13.1% Portion of Solaris Energy Infrastructure, Inc. Class A Stock reported as owned by BlackRock, Inc.

Sole voting power 7,935,602 shares Shares for which BlackRock, Inc. has sole power to vote or direct the vote

Sole dispositive power 8,024,851 shares Shares for which BlackRock, Inc. has sole power to dispose or direct disposition

Shared voting power 0 Shares for which BlackRock, Inc. has shared power to vote or direct vote

Shared dispositive power 0 Shares for which BlackRock, Inc. has shared power to dispose or direct disposition

iShares Core S&P Small-Cap ETF interest More than five percent Interest in Solaris common stock held on behalf of iShares Core S&P Small-Cap ETF

Key Terms

beneficially owned, sole voting power, sole dispositive power, Schedule 13G, +2 more

6 terms

beneficially owned financial

"this reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 7,935,602.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 8,024,851.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13G regulatory

"In accordance with SEC Release No. 34-39538 (January 12, 1998), this reflects the securities"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

parent holding company financial

"Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company"

Power of Attorney regulatory

"Exhibit 24: Power of Attorney"

A power of attorney is a legal document that allows one person to make decisions and act on behalf of another person, often in financial or legal matters. It’s like giving someone a trusted helper or agent the authority to handle important tasks if you are unable to do so yourself. This matters to investors because it can impact how their assets are managed or transferred if they become unable to oversee their affairs.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/06/2026 - 01:25 PM Accepted by SEC EDGAR 08/06/2026 - 01:24 PM Learn about SEC filing dates

FAQ

What ownership stake in Solaris Energy Infrastructure, Inc. (SEI) does BlackRock report?

BlackRock reports beneficial ownership of 8,024,851 shares of Solaris Energy Infrastructure, Inc. Class A Stock, representing 13.1% of the outstanding class, as disclosed in Amendment No. 11 to its Schedule 13G filing.

How many Solaris (SEI) shares can BlackRock vote and dispose of?

BlackRock has sole voting power over 7,935,602 shares and sole dispositive power over 8,024,851 shares of Solaris Class A Stock, with no shared voting or shared dispositive power reported.

Which BlackRock entity holds more than 5% of Solaris (SEI) stock?

The filing states that iShares Core S&P Small-Cap ETF has an interest in Solaris common stock that is more than five percent of the total outstanding common stock, within BlackRock’s reported holdings.

What type of securities does BlackRock hold in Solaris Energy Infrastructure (SEI)?

BlackRock reports holdings in Class A Stock of Solaris Energy Infrastructure, Inc., identified by CUSIP 83418M103, and discloses its voting and dispositive powers over these equity securities.

What is the nature of BlackRock’s beneficial ownership disclosure for SEI?

The ownership reflects securities beneficially owned or deemed beneficially owned by certain BlackRock business units, while excluding other units whose holdings are disaggregated under SEC Release No. 34-39538.

When is BlackRock’s reported Solaris (SEI) ownership information effective?

The cover information lists a date of 07/31/2026, and the Schedule 13G/A Amendment No. 11 is signed on 08/06/2026 by a BlackRock Managing Director, indicating the timing of the reported ownership.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 11)

Solaris Energy Infrastructure, Inc.

(Name of Issuer)

Class A Stock

(Title of Class of Securities)

83418M103

(CUSIP Number)

07/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 83418M103

1

Names of Reporting Persons

BlackRock, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 7,935,602.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 8,024,851.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,024,851.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

13.1 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Solaris Energy Infrastructure, Inc.
(b)	Address of issuer's principal executive offices: 9651 KATY FREEWAY, SUITE 300 HOUSTON TX 77024
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Class A Stock
(e)	CUSIP No.: 83418M103
Item 4.	Ownership
(a)	Amount beneficially owned: 8024851
(b)	Percent of class: 13.1 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 7935602
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 8024851
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The interest of 1 such person, iShares Core S&P Small-Cap ETF, in the common stock of Solaris Energy Infrastructure, Inc. is more than five percent of the total outstanding common stock.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	08/06/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7