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 Q2 2026
Institutions Reporting
360
Shares (Excl. Options)
65,249,226
Price
$56.51
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- Security type / class
- Equity / Class A Common Stock, $0.01 par value
- Symbol
- SEI on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 65,249,226
- Total 13F value
- $3,686,480,321
- Portfolio coverage rank
- 0.01%
- Share change
- -3,641,143
- Value change
- -$146,777,029
- Number of holders
- 360
- Shares outstanding
- 58,139,535
- SEC-reported price per share
- $80.46
- Insider filing price
- $80.46
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value is tracked under CUSIP 83418M103.
- 360 institutions reported positions in Q1 2026.
- 17 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 360 to 36 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $3,686,480,321 to $65,085,317.
Research use
- 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.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 360 institutions filings for Q1 2026.
Security key
83418M103
Latest holder period
Q1 2026
13F holders
360
13D/G owners
17
CIK / CUSIP context first
Open Q1 2026 holders
SEI full holder history
Solaris Energy Infrastructure, Inc. SEC filings
Solaris Energy Infrastructure, Inc. company facts
Solaris Energy Infrastructure, Inc. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 83418M103:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
17
Security
SEI
| 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, 360 institutional investors reported holding 65,249,226 shares of Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI). This represents 112% of the company’s total 58,139,535 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
66%
| 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 |
| Situational Awareness Partners LP | 1.9% | 1,105,551 | 0% | 1.6% | $62,474,687 |
| Situational Awareness LP | 1.9% | 1,105,551 | -41% | 1.6% | $62,474,687 |
| 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 |
| Value Aligned Research Advisors, LLC | 1.5% | 896,985 | -8.1% | 0.6% | $50,688,622 |
| DIMENSIONAL FUND ADVISORS LP | 1.5% | 871,462 | +20% | 0.01% | $49,239,114 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
37
Latest
Q1 2026
Rows shown
1-25 of 37
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 817,163 | $65,085,317 | +$13,316,486 | $80.46 | 36 |
| 2026 Q1 | 65,249,226 | $3,686,480,321 | -$146,777,029 | $56.51 | 360 |
| 2025 Q4 | 67,441,978 | $3,100,169,557 | +$542,511,929 | $45.97 | 335 |
| 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 |