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Solaris Energy Infrastructure, Inc.

SEI
Exchange
NYSE
Industry
Oil & Gas Field Machinery & Equipment
SEC CIK
0001697500

In the last 90 days, Solaris Energy Infrastructure, Inc. insiders filed 1 open-market purchase and 0 sales; 433 institutions reported holding it in 13F filings for Q2 2026, worth $5.71B in total; no superinvestor holds it.

Holders of 5% or more of SEI

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Solaris Energy Infrastructure, Inc., largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of SEI
HolderLatest formStakeChangeFirst filedLatest filingFiling
Yorktown Energy Partners X, L.P.13G/A16.05%7.08M shares–Feb 14, 20251 filingFeb 14, 2025SEC
Zartler William A13G/A10.00%5.29M shares−2.10 ppfrom 12.10%Feb 14, 20252 filingsFeb 13, 2026SEC
Solaris Energy Capital, LLC13G/A8.50%3.51M shares–Feb 14, 20251 filingFeb 14, 2025SEC
BlackRock, Inc.13G/A5.60%2.07M shares+5.60 ppfrom 0.00%Jan 8, 20254 filingsFeb 7, 2025SEC
Encompass Capital Advisors LLC13G/A5.24%2.56M shares−1.31 ppfrom 6.55%Feb 14, 20254 filingsFeb 17, 2026SEC
Voya Financial, Inc.13G5.20%2.55M sharesNewFeb 12, 20261 filingFeb 12, 2026SEC
FMR LLC13G5.20%2.32M sharesNewNov 5, 20251 filingNov 5, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

38 Schedule 13D and 13G filings on Solaris Energy Infrastructure, Inc., newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on SEI
Filed (ET)FilerFormStakeChangeEvent dateFiling
Mar 27, 20261:17 PM ETVanguard Group Inc13G/A0.00%0 shares−6.04 ppfrom 6.04%Below 5%Mar 13, 2026SEC
Feb 17, 20264:14 PM ETEncompass Capital Advisors LLCand 2 others13G/A5.24%2.56M shares−1.31 ppfrom 6.55%Dec 31, 2025SEC
Feb 13, 20264:01 PM ETZartler William A13G/A10.00%5.29M shares−2.10 ppfrom 12.10%Dec 31, 2025SEC
Feb 12, 202610:39 AM ETVoya Financial, Inc.13G5.20%2.55M sharesNewDec 31, 2025SEC
Feb 4, 20264:21 PM ETJane Street Group, LLCand 3 others13G/A3.70%1.79M shares−1.40 ppfrom 5.10%Below 5%Dec 31, 2025SEC
Dec 8, 20254:31 PM ETJane Street Group, LLCand 3 others13G5.10%2.49M sharesNewDec 1, 2025SEC
Nov 14, 20254:12 PM ETEncompass Capital Advisors LLCand 2 others13G/A6.55%2.92M shares−3.00 ppfrom 9.55%Sep 30, 2025SEC
Nov 14, 20251:47 PM ETSummit Partners Public Asset Management, LLCand 12 others13G/A4.03%1.80M shares−1.19 ppfrom 5.22%Below 5%Sep 30, 2025SEC
Nov 14, 20257:24 AM ETDriehaus Capital Management LLC13G/A2.16%961.5K shares−3.17 ppfrom 5.33%Below 5%Sep 30, 2025SEC
Nov 6, 20256:49 PM ETKTR Management Company, LLCand 1 other13D/A3.94%2.00M shares−2.16 ppfrom 6.10%Below 5%Nov 4, 2025SEC
Nov 5, 202511:44 AM ETFMR LLCand 1 other13G5.20%2.32M sharesNewSep 30, 2025SEC
Oct 17, 202512:45 PM ETBlackRock Portfolio Management LLC13G/A4.90%2.18M shares−3.60 ppfrom 8.50%Below 5%Sep 30, 2025SEC
Aug 8, 20254:27 PM ETKTR Management Company, LLCand 1 other13D/A6.10%4.11M shares–Aug 6, 2025SEC
Jul 30, 20258:33 PM ETJ Turbines, Inc.and 1 other13D/A3.10%2.11M shares−10.30 ppfrom 13.40%Below 5%Jul 28, 2025SEC
Jul 29, 20252:32 PM ETVanguard Group Inc13G6.04%2.44M shares+1.81 ppfrom 4.23%Jun 30, 2025SEC
Jul 21, 20254:31 PM ETMillennium Management LLCand 2 others13G/A1.60%647.4K shares−3.40 ppfrom 5.00%Below 5%Jun 30, 2025SEC
Jul 15, 20255:12 PM ETBlackRock Portfolio Management LLC13G/A8.50%3.43M shares−2.40 ppfrom 10.90%Jun 30, 2025SEC
May 15, 20254:07 PM ETEncompass Capital Advisors LLCand 2 others13G/A9.55%3.63M shares+3.35 ppfrom 6.20%Mar 31, 2025SEC
May 15, 20254:03 PM ETSummit Partners Public Asset Management, LLCand 12 others13G/A5.22%1.99M shares−1.26 ppfrom 6.48%Mar 31, 2025SEC
May 15, 20254:00 PM ETMillennium Management LLCand 2 others13G5.00%2.03M shares+0.03 ppfrom 4.97%May 9, 2025SEC
May 15, 20257:33 AM ETDriehaus Capital Management LLC13G5.33%2.03M sharesNewMar 31, 2025SEC
May 14, 202510:47 AM ETT. Rowe Price Investment Management, Inc.13G/A1.00%379.4K shares−5.70 ppfrom 6.70%Below 5%Mar 31, 2025SEC
May 8, 20254:00 PM ETMillennium Management LLCand 2 others13G4.97%2.01M sharesNewBelow 5%May 1, 2025SEC
May 7, 20259:11 PM ETJ Turbines, Inc.and 1 other13D/A13.40%6.26M shares–May 5, 2025SEC
Apr 30, 202511:11 AM ETVanguard Group Inc13G/A4.23%1.61M shares–Below 5%Mar 31, 2025SEC
Apr 3, 20254:00 PM ETBlackRock Portfolio Management LLC13G10.90%4.15M sharesNewMar 31, 2025SEC
Feb 14, 20255:33 PM ETSolaris Energy Capital, LLC13G/A8.50%3.51M shares–Dec 31, 2024SEC
Feb 14, 20255:31 PM ETZartler William A13G/A12.10%5.11M shares–Dec 31, 2024SEC
Feb 14, 20254:03 PM ETEncompass Capital Advisors LLCand 1 other13G/A6.20%2.29M shares–Dec 31, 2024SEC
Feb 14, 20253:39 PM ETYorktown Energy Partners X, L.P.and 2 others13G/A16.05%7.08M shares–Dec 31, 2024SEC
Feb 14, 202512:58 PM ETSummit Partners Public Asset Management, LLCand 12 others13G/A6.48%2.40M shares+0.61 ppfrom 5.87%Dec 31, 2024SEC
Feb 14, 20259:45 AM ETT. Rowe Price Investment Management, Inc.13G6.70%2.49M sharesNewDec 31, 2024SEC
Feb 7, 20251:53 PM ETBlackRock, Inc.13G/A5.60%2.07M shares+5.60 ppfrom 0.00%Jan 31, 2025SEC
Feb 7, 20251:05 PM ETBlackRock, Inc.13G/A0.00%6 shares0.00 ppfrom 0.00%Below 5%Jan 31, 2025SEC
Feb 7, 202512:52 PM ETBlackRock, Inc.13G/A0.00%6 shares−15.40 ppfrom 15.40%Below 5%Jan 31, 2025SEC
Jan 23, 20253:55 PM ETDimensional Fund Advisors LP13G/A2.30%866.5K shares–Below 5%Dec 31, 2024SEC
Jan 8, 20257:10 PM ETBlackRock, Inc.13G15.40%5.68M sharesNewDec 31, 2024SEC
Dec 13, 20243:55 PM ETSummit Partners Public Asset Management, LLCand 12 others13G5.87%2.17M sharesNewDec 6, 2024SEC

Form 144: proposed insider sales

Notices from officers, directors and other affiliates planning to sell Solaris Energy Infrastructure, Inc. shares.

No Form 144 notices for Solaris Energy Infrastructure, Inc. are on file.