Solaris Energy Infrastructure SEI Institutional Ownership

Ownership Summary

Solaris Energy Infrastructure, Inc. (NYSE:SEI) appears in 354 institutional 13F filings for the quarter ending March 2026.

• These investors held 124.4% of outstanding shares in March 2026, down from 164.9% in December 2025.
• They increased total shares held in Solaris Energy Infrastructure by 7.7% from the prior quarter, while the number of investors in SEI increased 76.12% year over year.
• Activity in SEI broke down as 215 buyers, 109 sellers, and 30 unchanged among 354 total holders.
• In total, institutional investors held 64.88Mn shares in Solaris Energy Infrastructure as of March 2026, up by 4.64Mn shares quarter on quarter, and up 22.38Mn shares year over year.
• As of March 31, 2026, the biggest holder of Solaris Energy Infrastructure is BlackRock, Inc. at 4.12Mn shares, representing 7.9% of shares outstanding.
• The most significant purchases of SEI for the quarter ending March 2026 came from VANGUARD CAPITAL MANAGEMENT LLC (2.04Mn), Situational Awareness Partners LP (1.11Mn), TWO SIGMA INVESTMENTS, LP (861.62K), JENNISON ASSOCIATES LLC (805.32K), VAN ECK ASSOCIATES CORP (712.74K).
• The largest sales of SEI for the quarter ending March 2026 came from Goldman Sachs Group Inc (2.63Mn), Encompass Capital Advisors LLC (809.54K), Situational Awareness LP (760.95K), Ceredex Value Advisors LLC (680.55K), CITADEL ADVISORS LLC (671.02K).
• Solaris Energy Infrastructure's 10 largest shareholders as of March 2026 include BlackRock, Inc. (4.12Mn), MILLENNIUM MANAGEMENT LLC (2.29Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.04Mn), VAN ECK ASSOCIATES CORP (1.95Mn), TWO SIGMA INVESTMENTS, LP (1.94Mn), FMR LLC (1.86Mn), Encompass Capital Advisors LLC (1.75Mn), SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC (1.73Mn), Morgan Stanley (1.71Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (1.63Mn) per Business Quant data.