Latest Period
Q1 2026
Security Snapshot
Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI) Institutional Ownership
CUSIP: 83418M103
13F Institutional Holders and Ownership History from Q2 2017 to Q1 2026
Institutions Reporting
348
Shares (Excl. Options)
61,439,039
Price
$56.51
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- Type / Class
- Equity / Class A Common Stock, $0.01 par value
- Symbol
- SEI on NYSE
- Shares outstanding
- 58,139,535
- Price per share
- $74.44
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 61,439,039
- Total reported value
- $3,471,254,392
- % of total 13F portfolios
- 0.01%
- Share change
- -1,853,668
- Value change
- -$55,946,278
- Number of holders
- 348
- Price from insider filings
- $74.44
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value is tracked under CUSIP 83418M103.
- 348 institutions reported positions in Q1 2026.
- 17 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 333 to 348 between Q4 2025 and Q1 2026.
- Reported value moved from $3,100,151,537 to $3,471,254,392.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 348 institutions filings for Q1 2026.
Investment Quick Answers
What is CUSIP 83418M103?
CUSIP 83418M103 identifies SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q1 2026 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 83418M103:
Significant Owners of Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Yorktown Energy Partners X, L.P. | 16% | $146,752,521 | 7,079,234 | Yorktown Energy Partners X, L.P. | 31 Dec 2024 | |||
| Zartler William A | 10% | -18% | $279,182,027 | +$9,725,454 | 5,289,542 | +3.6% | William A. Zartler | 31 Dec 2025 |
| Solaris Energy Capital, LLC | 8.5% | $72,834,772 | 3,513,496 | Solaris Energy Capital, LLC | 31 Dec 2024 | |||
| Voya Financial, Inc. | 5.2% | $134,371,494 | 2,545,879 | Voya Financial, Inc. | 31 Dec 2025 | |||
| VANGUARD GROUP INC | 6% | +45% | $69,051,618 | +$23,469,922 | 2,440,849 | +51% | The Vanguard Group | 30 Jun 2025 |
| BlackRock Portfolio Management LLC | 4.9% | -40% | $86,965,247 | -$50,313,357 | 2,175,763 | -37% | BlackRock Portfolio Management LLC | 30 Sep 2025 |
| J Turbines, Inc. | 3.1% | -79% | $65,981,230 | -$129,480,000 | 2,114,783 | -66% | J Turbines, Inc. | 28 Jul 2025 |
| BlackRock, Inc. | 5.6% | -65% | $42,820,012 | -$74,998,321 | 2,065,606 | -64% | BlackRock, Inc. | 31 Jan 2025 |
| FMR LLC | 3.8% | -28% | $127,867,092 | -$16,870,568 | 2,049,481 | -12% | FMR LLC | 31 Mar 2026 |
| KTR Management Company, LLC | 3.9% | -36% | $79,940,000 | -$84,527,877 | 2,000,000 | -51% | KTR Management Company, LLC | 04 Nov 2025 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 4% | -24% | $71,798,511 | -$7,575,674 | 1,796,310 | -9.5% | Summit Partners Public Asset Management, LLC | 30 Sep 2025 |
| JANE STREET GROUP, LLC | 3.7% | -28% | $82,214,378 | -$32,416,006 | 1,788,416 | -28% | JANE STREET GROUP, LLC | 31 Dec 2025 |
| Encompass Capital Advisors LLC | 3% | -45% | $109,182,500 | -$50,507,388 | 1,750,000 | -32% | Encompass Capital Advisors LLC | 31 Mar 2026 |
| DRIEHAUS CAPITAL MANAGEMENT LLC | 2.2% | -63% | $38,433,034 | -$42,522,884 | 961,547 | -53% | DRIEHAUS CAPITAL MANAGEMENT LLC | 30 Sep 2025 |
| DIMENSIONAL FUND ADVISORS LP | 2.3% | $17,962,338 | 866,490 | Dimensional Fund Advisors LP | 31 Dec 2024 | |||
| MILLENNIUM MANAGEMENT LLC | 1.6% | -68% | $18,313,899 | -$39,209,685 | 647,363 | -68% | Millennium Management LLC | 30 Jun 2025 |
| T. Rowe Price Investment Management, Inc. | 1% | -81% | $7,864,941 | -$43,714,263 | 379,399 | -85% | T. Rowe Price Investment Management, Inc. | 31 Mar 2025 |
As of 31 Mar 2026, 348 institutional investors reported holding 61,439,039 shares of Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI). This represents 106% of the company’s total 58,139,535 outstanding shares.
Top 25 Institutional Shareholders
The largest institutional shareholders of Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI) together control 65% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7.1% | 4,122,436 | -4.4% | 0% | $232,958,879 |
| MILLENNIUM MANAGEMENT LLC | 3.9% | 2,285,544 | +24% | 0.1% | $129,156,091 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.5% | 2,040,451 | 0% | 0% | $115,305,886 |
| VAN ECK ASSOCIATES CORP | 3.4% | 1,954,455 | +57% | 0.08% | $110,446,000 |
| TWO SIGMA INVESTMENTS, LP | 3.3% | 1,941,546 | +80% | 0.09% | $109,716,764 |
| FMR LLC | 3.2% | 1,862,561 | -19% | 0.01% | $105,253,347 |
| Encompass Capital Advisors LLC | 3% | 1,750,000 | -32% | 4% | $98,892,500 |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | 3% | 1,729,055 | -17% | 4.5% | $97,708,898 |
| MORGAN STANLEY | 2.9% | 1,707,455 | -18% | 0.01% | $96,488,360 |
| Driehaus Capital Management LLC | 2.8% | 1,628,174 | +33% | 0.68% | $92,008,113 |
| JANE STREET GROUP, LLC | 2.7% | 1,568,463 | -4.4% | 0.1% | $88,633,844 |
| MARSHALL WACE, LLP | 2.5% | 1,470,242 | +75% | 0.09% | $83,083,375 |
| STATE STREET CORP | 2.3% | 1,355,346 | +15% | 0% | $76,590,602 |
| Advent International, L.P. | 2.1% | 1,241,362 | -1.8% | 1.7% | $70,149,367 |
| JENNISON ASSOCIATES LLC | 2% | 1,179,736 | +215% | 0.05% | $66,666,882 |
| PRINCIPAL FINANCIAL GROUP INC | 2% | 1,144,652 | -22% | 0.03% | $64,684,284 |
| GOLDMAN SACHS GROUP INC | 2% | 1,133,863 | -40% | 0.01% | $64,074,608 |
| Valiant Capital Management, L.P. | 1.9% | 1,119,503 | +52% | 5% | $63,263,115 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.9% | 1,101,151 | +7.6% | 0% | $62,237,608 |
| GW&K Investment Management, LLC | 1.8% | 1,061,673 | -1.9% | 0.53% | $59,995,000 |
| WELLINGTON MANAGEMENT GROUP LLP | 1.6% | 929,162 | -26% | 0.01% | $52,506,944 |
| DIMENSIONAL FUND ADVISORS LP | 1.5% | 871,462 | +20% | 0.01% | $49,239,114 |
| Qube Research & Technologies Ltd | 1.4% | 793,314 | -31% | 0.06% | $44,830,174 |
| VOYA INVESTMENT MANAGEMENT LLC | 1.4% | 790,645 | +66% | 0.05% | $44,679,349 |
| AMERIPRISE FINANCIAL INC | 1.2% | 725,023 | +584% | 0.01% | $40,971,051 |
Institutional Holders of Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 61,439,039 | $3,471,254,392 | -$55,946,278 | $56.51 | 348 |
| 2025 Q4 | 67,441,586 | $3,100,151,537 | +$546,064,031 | $45.97 | 333 |
| 2025 Q3 | 55,288,645 | $2,209,741,534 | +$322,770,067 | $39.97 | 270 |
| 2025 Q2 | 47,822,065 | $1,352,942,005 | +$209,556,312 | $28.29 | 210 |
| 2025 Q1 | 40,959,060 | $891,389,031 | +$125,489,923 | $21.76 | 199 |
| 2024 Q4 | 35,026,280 | $1,008,015,576 | +$330,954,907 | $28.78 | 176 |
| 2024 Q3 | 23,891,385 | $304,882,226 | +$21,556,997 | $12.76 | 131 |
| 2024 Q2 | 23,566,847 | $202,202,624 | -$10,503,128 | $8.58 | 125 |
| 2024 Q1 | 24,776,940 | $214,813,351 | +$8,135,791 | $8.67 | 131 |
| 2023 Q4 | 24,084,675 | $191,738,828 | +$18,784,861 | $7.96 | 138 |
| 2023 Q3 | 21,580,847 | $230,088,306 | -$4,322,692 | $10.66 | 117 |
| 2023 Q2 | 21,865,662 | $182,138,714 | -$9,893,331 | $8.33 | 99 |
| 2023 Q1 | 23,009,966 | $196,422,104 | -$9,801,327 | $8.54 | 116 |
| 2022 Q4 | 24,123,730 | $239,546,440 | +$1,380,820 | $9.93 | 124 |
| 2022 Q3 | 24,016,823 | $224,792,939 | -$6,310,753 | $9.36 | 124 |
| 2022 Q2 | 24,511,101 | $267,404,973 | +$26,468,188 | $10.88 | 128 |
| 2022 Q1 | 25,512,174 | $287,543,035 | +$27,999,891 | $11.29 | 119 |
| 2021 Q4 | 24,028,641 | $157,347,942 | -$9,728,057 | $6.55 | 106 |
| 2021 Q3 | 22,086,837 | $184,043,705 | -$8,432,086 | $8.34 | 103 |
| 2021 Q2 | 23,235,974 | $226,483,516 | -$1,340,673 | $9.74 | 110 |
| 2021 Q1 | 23,036,908 | $282,690,714 | -$11,838,374 | $12.27 | 112 |
| 2020 Q4 | 24,269,365 | $198,356,824 | +$7,469,199 | $8.14 | 105 |
| 2020 Q3 | 23,045,511 | $146,354,939 | -$12,723,493 | $6.34 | 103 |
| 2020 Q2 | 24,838,556 | $184,077,094 | -$13,349,950 | $7.42 | 117 |
| 2020 Q1 | 26,961,050 | $141,451,139 | -$42,008,927 | $5.25 | 116 |
| 2019 Q4 | 32,030,580 | $448,434,684 | +$6,768,699 | $14.00 | 134 |
| 2019 Q3 | 31,750,229 | $426,194,375 | -$5,644,124 | $13.42 | 122 |
| 2019 Q2 | 31,847,359 | $477,016,506 | +$24,771,910 | $14.98 | 138 |
| 2019 Q1 | 30,115,077 | $495,370,281 | +$14,865,030 | $16.44 | 117 |
| 2018 Q4 | 29,290,558 | $354,114,534 | -$176,798,425 | $12.09 | 103 |
| 2018 Q3 | 36,963,944 | $698,231,737 | +$17,092,508 | $18.89 | 107 |
| 2018 Q2 | 36,491,754 | $521,298,878 | +$19,334,857 | $14.29 | 117 |
| 2018 Q1 | 34,777,544 | $575,921,448 | +$83,458,284 | $16.56 | 116 |
| 2017 Q4 | 29,647,208 | $634,773,241 | +$108,694,736 | $21.41 | 99 |
| 2017 Q3 | 24,753,743 | $431,482,203 | -$2,541,839 | $17.43 | 67 |
| 2017 Q2 | 25,247,901 | $291,103,222 | +$291,103,222 | $11.53 | 52 |