William A. Zartler - 01 Mar 2026 Form 4 Insider Report for Solaris Energy Infrastructure, Inc. (SEI)

Reporting relationship: Chairman and Co-CEO, Director, 10%+ Owner
Issuer ticker: SEI
Reported as of: 01 Mar 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Mar 2026, 17:43:05 UTC
Prior SEC filing: 15 Oct 2025
Source filing: View source filing
Reporting owner signature: /s/ Christopher M. Powell, Attorney-in-Fact

Key filing fact

William A. Zartler filed Form 4 for Solaris Energy Infrastructure, Inc. (SEI) on 03 Mar 2026.

Key facts

This page summarizes William A. Zartler's Form 4 filing for Solaris Energy Infrastructure, Inc. (SEI).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 17:43.

Change

Previous filing in this sequence was filed on 15 Oct 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001520378 Primary reporting owner

Zartler William A

Relationship: Chairman and Co-CEO, Director, 10%+ Owner
Address: 9651 KATY FREEWAY, SUITE 300, HOUSTON
Signature: /s/ Christopher M. Powell, Attorney-in-Fact
Signature date: 03 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SEI transaction

Class A Common Stock

Award

Transaction value: $0
Shares: +150,000
Change %: +14%
Price: $0.000000
Shares after: 1,199,227
Date: 01 Mar 2026
Ownership: Direct
Footnotes: F1

SEI transaction

Class A Common Stock

Award

Transaction value: $0
Shares: +115,656
Change %: +9.6%
Price: $0.000000
Shares after: 1,314,883
Date: 01 Mar 2026
Ownership: Direct
Footnotes: F2, F3

SEI holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 726,819
Date: 01 Mar 2026
Ownership: Direct
Footnotes: F4

SEI holding

Class B Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,513,496
Date: 01 Mar 2026
Ownership: See Footnote
Footnotes: F4, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SEI holding Derivative

Solaris Energy Infrastructure, LLC Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 726,819
Date: 01 Mar 2026
Ownership: Direct
Underlying class: Class A Common Stock
Underlying amount: 726,819
Exercise price
Footnotes: F6

SEI holding Derivative

Solaris Energy Infrastructure, LLC Units

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 3,513,496
Date: 01 Mar 2026
Ownership: See Footnote
Underlying class: Class A Common Stock
Underlying amount: 3,513,496
Exercise price
Footnotes: F5, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

Restricted Stock Award granted pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan on the date indicated. The award vests in three equal installments on the first three anniversaries of the grant date.

Footnote F2

Reflects the vesting and settlement of shares that relate to multiple Performance-Based Restricted Stock Unit (PSU) awards granted pursuant to the Solaris Energy Infrastructure, Inc. Long Term Incentive Plan. The PSUs which were originally granted on March 1, 2023, March 1, 2024 and March 1, 2025 vested and were settled based on the Issuer's level of achievement with respect to the applicable performance goals

Footnote F3

Includes 387,755 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.

Footnote F4

Each share of Class B common stock has no economic rights but entitles the holder to one vote on all matters to be voted on by the stockholders generally.

Footnote F5

Represents shares held by Solaris Energy Capital. The Reporting Person is the sole member of Solaris Energy Capital and has the authority to vote or dispose of the shares held by Solaris Energy Capital in his sole discretion. The Reporting Person disclaims beneficial ownership of the shares held by Solaris Energy Capital in excess of his pecuniary interest therein.

Footnote F6

Subject to the Solaris LLC Agreement, the Solaris LLC Units (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer.