Solaris Energy Infrastructure, Inc. (SEI) Ownership
SEI ownership summary
as of October 18, 2026- Institutions
- 106.0% of shares outstanding
- Insiders
- 8.63% of shares outstanding
- Shares outstanding
- 65.8M
- Float
- 62.8M shares available to trade
- Short interest
- 25.90% 16.3M shares short
- Days to cover
- 5.83 short interest up 8.8% vs prior month
- Institutions 105.98%
- Insiders 8.63%
SEI top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 7.91% | 5.2M | $326.5M | +1.1M (+26.2%) | June 30, 2026 |
| 2 | Encompass Capital Advisors LLC | 3.83% | 2.5M | $158.1M | +769,604 (+44.0%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 3.72% | 2.4M | $153.6M | +407,179 (+20.0%) | June 30, 2026 |
| 4 | Morgan Stanley - Brokerage Accounts | 3.07% | 2.0M | $127.0M | +316,828 (+18.6%) | June 30, 2026 |
| 5 | Two Sigma Investments LLC | 3.01% | 2.0M | $124.2M | +38,315 (+2.0%) | June 30, 2026 |
| 6 | Summit Partners Public Asset Management, LLC | 2.57% | 1.7M | $106.2M | −36,217 (−2.1%) | June 30, 2026 |
| 7 | Jennison Associates LLC | 2.57% | 1.7M | $106.1M | +511,457 (+43.4%) | June 30, 2026 |
| 8 | Valiant Capital Management LP | 2.44% | 1.6M | $100.7M | +484,843 (+43.3%) | June 30, 2026 |
| 9 | Driehaus Capital Management LLC | 2.41% | 1.6M | $99.4M | −43,189 (−2.7%) | June 30, 2026 |
| 10 | FMR Inc | 2.40% | 1.6M | $99.2M | −281,159 (−15.1%) | June 30, 2026 |
| 11 | State Street Corp | 2.26% | 1.5M | $93.3M | +132,118 (+9.7%) | June 30, 2026 |
| 12 | Van Eck Associates Corporation | 2.25% | 1.5M | $92.8M | −475,786 (−24.3%) | June 30, 2026 |
| 13 | Geode Capital Management, LLC | 2.05% | 1.4M | $84.9M | +251,299 (+22.8%) | June 30, 2026 |
| 14 | The Goldman Sachs Group Inc | 1.94% | 1.3M | $80.2M | +144,755 (+12.8%) | June 30, 2026 |
| 15 | Ameriprise Financial Inc | 1.74% | 1.1M | $71.8M | +419,904 (+57.9%) | June 30, 2026 |
| 16 | ClearBridge Advisors, LLC | 1.73% | 1.1M | $71.4M | +1.0M (+920.2%) | June 30, 2026 |
| 17 | Situational Awareness LP | 1.72% | 1.1M | $70.9M | +24,070 (+2.2%) | June 30, 2026 |
| 18 | Situational Awareness Partners LP | 1.68% | 1.1M | $69.4M | +1.1M (0.0%) | March 31, 2026 |
| 19 | Korea Investment Corp. | 1.66% | 1.1M | $68.8M | +425,486 (+63.5%) | June 30, 2026 |
| 20 | Advent International LP | 1.66% | 1.1M | $68.7M | −146,935 (−11.8%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 7.1M shares and 5 cut 983K.
SEI top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.96% | 3.9M | $246.0M | +861 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 2.68% | 1.8M | $110.8M | −2,191 (−0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.21% | 1.5M | $91.2M | −16,768 (−1.1%) | September 30, 2026 |
| 4 | VanEck Oil Services ETF | 2.06% | 1.4M | $84.9M | — | September 30, 2026 |
| 5 | PGIM Jennison Small Company A | 0.99% | 649K | $40.7M | — | August 31, 2026 |
| 6 | iShares S&P Small-Cap 600 Growth ETF | 0.93% | 610K | $38.3M | — | September 30, 2026 |
| 7 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 599K | $37.6M | — | September 30, 2026 |
| 8 | Fidelity Small Cap Index | 0.89% | 584K | $36.7M | +5,050 (+0.9%) | July 31, 2026 |
| 9 | iShares Russell 2000 Growth ETF | 0.80% | 527K | $33.0M | −667 (−0.1%) | September 30, 2026 |
| 10 | Principal SmallCap R5 | 0.79% | 522K | $32.8M | +21,191 (+4.2%) | August 31, 2026 |
| 11 | Westwood Salient MLP & Engy Infras Inst | 0.79% | 518K | $32.5M | — | August 31, 2026 |
| 12 | Columbia Acorn Inst | 0.75% | 494K | $31.0M | +94,320 (+23.6%) | August 31, 2026 |
| 13 | Vanguard Explorer Inv | 0.73% | 482K | $30.2M | +371,450 (+336.5%) | June 30, 2026 |
| 14 | Oberweis Small-Cap Opportunities | 0.72% | 471K | $29.6M | — | June 30, 2026 |
| 15 | State Street® SPDR® S&P 600™ Sm Cp GrETF | 0.58% | 379K | $23.8M | — | September 30, 2026 |
| 16 | ClearBridge Small Cap Growth A | 0.54% | 358K | $22.5M | — | August 31, 2026 |
| 17 | Schwab US Small-Cap ETF™ | 0.53% | 346K | $21.7M | +234 (+0.1%) | September 30, 2026 |
| 18 | Vanguard Russell 2000 ETF | 0.47% | 307K | $19.3M | +7,251 (+2.4%) | August 31, 2026 |
| 19 | Vanguard Tax-Managed Small Cap Adm | 0.44% | 289K | $18.2M | — | August 31, 2026 |
| 20 | Vanguard Energy ETF | 0.44% | 288K | $18.1M | −17 (−0.0%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
SEI insider transactions
latest 14| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-01-09 | Gilbert Ray Cisneros, Jr. | Sell | $53.24 | — | — |
| 2025-12-17 | Aj Teague | Buy | $43.13 | 2,310 | $99,630 |
| 2025-12-17 | Amanda M Brock | Buy | $40.89 | 3,669 | $150,025 |
| 2025-12-17 | Cynthia M Durrett | Sell | $44.62 | 47,011 | $2.1M |
| 2025-12-17 | Laurie H Argo | Sell | $44.25 | 2,300 | $101,775 |
| 2025-11-04 | Ktr Management Company, Llc | Sell | $50.15 | 2,114,783 | $106.1M |
| 2025-09-09 | Kyle S Ramachandran | Buy | $25.00 | 2,000 | $50,000 |
| 2025-09-09 | William A Zartler | Buy | $24.83 | 10,000 | $248,300 |
| 2025-08-26 | Christopher M Powell | Sell | $30.00 | 12,750 | $382,500 |
| 2025-08-25 | Edgar R Jr. Giesinger | Sell | $28.86 | 10,000 | $288,600 |
| 2025-05-23 | Aj Teague | Buy | $26.77 | 1,000 | $26,770 |
| 2025-05-21 | William A Zartler | Buy | $21.78 | 10,000 | $217,800 |
| 2025-05-06 | Gilbert Ray Cisneros, Jr. | Buy | $22.29 | — | — |
| 2025-05-01 | Aj Teague | Buy | $22.58 | 1,000 | $22,580 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
SEI shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns SEI
Institutional investors own 106.0% of Solaris Energy Infrastructure's shares and insiders 8.63%. The largest holder is BlackRock Inc with 7.91% of the shares (5.2M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 25.90% of the float, or 5.83 days of average trading volume. The share count rose 390.1% since 2015.
Related: SEI analyst forecast, SEI key metrics, SEI dividend history. See the SEI stock overview for the latest quote and news.
SEI ownership FAQ
Who owns the most Solaris Energy Infrastructure stock?
The largest shareholders of Solaris Energy Infrastructure are BlackRock Inc (7.91%), Encompass Capital Advisors LLC (3.83%), Vanguard Capital Management, LLC (3.72%), Morgan Stanley - Brokerage Accounts (3.07%), Two Sigma Investments LLC (3.01%).
What percentage of Solaris Energy Infrastructure is owned by institutions?
Institutions hold 106.0% of Solaris Energy Infrastructure's shares outstanding; insiders hold 8.63%.
Which funds own Solaris Energy Infrastructure?
The largest fund holders of Solaris Energy Infrastructure are iShares Core S&P Small-Cap ETF (5.96%), Vanguard MStar Total Stk Mkt Idx Invest (2.68%), iShares Russell 2000 ETF (2.21%), VanEck Oil Services ETF (2.06%), PGIM Jennison Small Company A (0.99%).
What is Solaris Energy Infrastructure's short interest?
16.3M shares of Solaris Energy Infrastructure were sold short, 25.90% of the float; at the average daily volume it would take 5.83 days to cover.
Are insiders buying or selling Solaris Energy Infrastructure?
Of the latest 14 reported insider transactions in Solaris Energy Infrastructure (since May 1, 2025), 8 were purchases and 6 were sales.
How many shares of Solaris Energy Infrastructure are outstanding?
Solaris Energy Infrastructure has 65.8M shares outstanding, of which 62.8M are in the public float.