William A. Zartler
William A. Zartler: Chairman and Co-CEO · Director · 10% owner at Solaris Energy Infrastructure. What William A. Zartler holds in an AI or semiconductor company tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Solaris Energy Infrastructure (SEI)
William A. Zartler holds 5.6M Solaris Energy Infrastructure shares (7.3% of the company), worth about $417.6M at the last price, according to the Form 4 of Mar 1, 2026.
- Shares held: 3.5M (4.6%), $264.1M — Held through companies or funds: 3.5M Class B.
- Shares held: 2.0M (2.7%), $153.5M — Held in their own name: 1.3M Class A, 726,819 Class B.
- Exchangeable units: 12.0M (15.7%), $901.6M — 12.0M shares to be obtained one for one by exchanging units of the subsidiary that runs the business.
Declarations
- Solaris Energy Infrastructure (SEI) — Form 4 of Mar 1, 2026 (Chairman and Co-CEO): grant or award of 150,000; grant or award of 115,656; 5.6M shares after 0001628280-26-014091
- Solaris Energy Infrastructure (SEI) — Form 4 of Sep 9, 2025 (CHAIRMAN AND CEO): open-market purchase of 10,000 at $24.83; 5.3M shares after 0001415889-25-023973
- Solaris Energy Infrastructure (SEI) — Form 4 of May 21, 2025 (CHAIRMAN AND CEO): open-market purchase of 10,000 at $21.78; 5.3M shares after 0001415889-25-014050
- Solaris Energy Infrastructure (SEI) — Form 4 of Mar 7, 2025 (CHAIRMAN AND CEO): open-market purchase of 10,000 at $23.23; 5.3M shares after 0001415889-25-007362
- Solaris Energy Infrastructure (SEI) — Form 4/A of Mar 6, 2025 (CHAIRMAN AND CEO): open-market purchase of 10,000 at $24.07; 5.3M shares after 0001415889-25-007591
- Solaris Energy Infrastructure (SEI) — Form 4 of Mar 6, 2025 (CHAIRMAN AND CEO): grant or award of 10,000 at $24.07; 5.3M shares after 0001415889-25-007343
- Solaris Energy Infrastructure (SEI) — Form 4 of Mar 1, 2025 (CHAIRMAN AND CEO): grant or award of 225,378; shares withheld for tax of 81,114 at $34.15; 5.2M shares after 0001415889-25-006638
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.