Wirtz Christopher P. 4

What Happened
Christopher P. Wirtz, Chief Accounting Officer of Solaris Energy Infrastructure, received equity awards and had shares withheld to satisfy tax obligations. On March 1, 2026 he was granted 3,296 and 1,814 shares (total 5,110) under the company’s Long Term Incentive Plan (grants reported at $0.00). On the same date 2,206 shares were surrendered/withheld at $49.63 per share to cover tax withholding, representing $109,484.

Key Details

• Transaction date(s): March 1, 2026 (reported on Form 4 filed March 3, 2026).
• Grants: 3,296 shares (F1) and 1,814 shares (F2) granted at $0.00 (award/settlement).
• Withholding/Disposition: 2,206 shares disposed at $49.63 to satisfy tax liability (reported value $109,484) (F3).
• Remaining/subject-to-vesting: Form notes 17,791 Class A shares remain subject to vesting from prior restricted stock awards (F4).
• Important footnotes: F1 = restricted stock awards vesting in three annual installments; F2 = PSUs from 2024/2025 vested and settled based on performance; F3 = shares withheld for tax obligations.
• Filing timeliness: Report filed March 3, 2026 covering transactions on March 1, 2026 (no late filing indicated in the filing).

Context
These transactions reflect equity compensation vesting and routine tax withholding, not an open-market buy or sell for investment purposes. The PSUs were settled based on performance metrics and certain restricted awards will continue to vest over time; withheld shares were used to satisfy tax obligations (a common cashless settlement method). Such awards increase insider ownership when vested, while withholding simply satisfies tax liabilities and should not be interpreted as a directional trade signal.