Durrett Cynthia M. 4

4 · Solaris Energy Infrastructure, Inc. · Filed Mar 3, 2026

AI-generated summary of this filing

Updated Mar 3, 2026

Solaris (SEI) CAO Cynthia Durrett Receives Award, Shares Withheld

What Happened

Cynthia M. Durrett, Chief Administrative Officer and a Director of Solaris Energy Infrastructure, received restricted stock awards and settled vested performance-based awards on March 1, 2026. The filing shows two grant/award acquisitions: 21,444 shares and 28,871 shares (both at $0.00 as awards).
To satisfy tax withholding on the vesting/settlement, 26,940 shares were withheld/disposed at $49.63 per share, equal to approximately $1,337,032. The awards include both time‑based restricted stock and performance‑based restricted stock units that vested and were settled based on achievement of performance goals.

Key Details

Transaction date: March 1, 2026; Form 4 filed March 3, 2026 (timely — within the 2-business-day reporting window).
Awards: 21,444 and 28,871 shares granted (awards shown at $0.00 per share because they are compensation grants).
Tax withholding: 26,940 shares withheld/disposed at $49.63/share for ~$1,337,032 to satisfy tax obligations upon vesting.
Footnotes: Awards granted under Solaris’ Long Term Incentive Plan; PSUs from prior grants (3/1/2023, 3/1/2024, 3/1/2025) vested and were settled based on performance. 63,581 Class A shares remain subject to future vesting per the filing.
Shares owned after the transaction: not specified in the provided excerpt of the filing.

Context

This action reflects vesting and settlement of compensation awards, not an open‑market investment sale or purchase. The withholding of shares to cover taxes is a common administrative step (cashless/tax‑satisfaction) and does not necessarily indicate a decision to sell for investment reasons.
PSUs settled here were performance‑based — their final share amount depended on Solaris’ achievement of specified goals.

Form 4

Period: 2026-03-01

DirectorChief Administrative Officer

Transactions

Award
Class A Common Stock
[F1]
2026-03-01+21,444→ 152,596 total
Award
Class A Common Stock
[F2]
2026-03-01+28,871→ 181,467 total
Tax Payment
Class A Common Stock
[F3][F4]
2026-03-01$49.63/sh−26,940$1,337,032→ 154,527 total

Holdings

Class B Common Stock
[F5]
165,038
Solaris Energy Infrastructure, LLC Units
[F6]
→ Class A Common Stock (165,038 underlying)
165,038

Footnotes (6)

[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.
[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.
[F3]Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards and Performance-Based Restricted Stock Awards.
[F4]Includes 63,581 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting.
[F5]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.
[F6]Subject to the terms of 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.

Signature

/s/ Christopher M. Powell, Attorney-in-Fact|2026-03-03

1 file