Stocks › SEI
Solaris Energy Infrastructure, Inc.
SEI·NYSE·
United States·USD
United States·USD$79.70
+4.95 (+6.62%)
Close · Oct 6, 2026 · Close Prices from Tiingo.com
SEI
Solaris Energy Infrastructure, Inc. · NYSE
Nasdaq 100S&P 500
Filings
Default90D1Y5YALL
SEIS&P 500 (rebased)
Congress BuyCongress SellInsider BuyInsider SellForm 1448-K ResultsLobbying
Loading price history…
Daily closes, adjusted for splits and dividends · Close Prices from Tiingo.comHover a marker, every one is a filing · move across the line for the crosshair
Congressional Trades
Recent trades of SEI by members of U.S. Congress · 3 on record · 1 in the last 12 months
| Politician | Stock | Type | Filed | Traded | |
|---|---|---|---|---|---|
 Gilbert Ray Cisneros, Jr.House · D · CA |
SEISolaris Energy Infrastructure, Inc. · Stock |
Sale $15,001 - $50,000 |
Feb 13, 2026 | Jan 9, 2026 | Filing ↗ |
| Gilbert Ray Cisneros, Jr.House · D · CA |
SEISolaris Energy Infrastructure, Inc. · Stock |
Purchase $1,001 - $15,000 |
Sep 12, 2025 | Sep 2, 2025 | Filing ↗ |
| Gilbert Ray Cisneros, Jr.House · D · CA |
SEISolaris Energy Infrastructure, Inc. · Stock |
Purchase $1,001 - $15,000 |
Jun 6, 2025 | May 6, 2025 | Filing ↗ |
Whale Activity
Position changes in SEI reported for 2026-06-30 by 2 tracked institutional filers
- Increased0
- New0
- Held0
- Decreased0
- Closed0
- No prior filing2
| Filer | Shares | Value | Change |
|---|---|---|---|
| KENNEDY CAPITAL MANAGEMENT LLC | 404.1K | $32.5M | — |
| Informed Momentum Co LLC | 111.2K | $8.9M | — |
KeyVex tracks a curated set of large 13F filers plus the largest positions in recent filings, so this is a sample of institutional activity, not the whole market.
Insider Trading
Net shares bought (+) or sold (−) on the open market by SEI insiders, by quarter · Form 4
Recent Insider Transactions
137 transactions on record · newest first
| Insider | Type | Shares | Price | Value | Date | |
|---|---|---|---|---|---|---|
| TEAGUE AJDirector · Director | Purchase | +3,900 | $64.25 | $251K | Sep 8, 2026 | Form 4 ↗ |
| TEAGUE AJDirector · Director | Purchase | +3,900 | $64.21 | $250K | Sep 8, 2026 | Form 4 ↗ |
| Wirtz Christopher P.Chief Accounting Officer | Tax withholding | −1,303 | $69.54 | $91K | Jun 1, 2026 | Form 4 ↗ |
| Wirtz Christopher P.Chief Accounting Officer | Sale | −700 | $77.22 | $54K | May 13, 2026 | Form 4 ↗ |
| Argo Laurie HDirector | Sale | −5,200 | $72.88 | $379K | May 12, 2026 | Form 4 ↗ |
| Powell Christopher MChief Legal Officer | Sale | −2,181 | $75.33 | $164K | May 11, 2026 | Form 4 ↗ |
| Powell Christopher MChief Legal Officer | Sale | −25.5K | $74.84 | $1.9M | May 11, 2026 | Form 4 ↗ |
| Powell Christopher MChief Legal Officer | Sale | −9,179 | $73.90 | $678K | May 11, 2026 | Form 4 ↗ |
| TEAGUE AJDirector | Purchase | +2,750 | $72.98 | $201K | May 8, 2026 | Form 4 ↗ |
| TEAGUE AJDirector | Purchase | +3,425 | $72.98 | $250K | May 8, 2026 | Form 4 ↗ |
| Walker Ray N JRDirector | Sale | −56.8K | $72.11 | $4.1M | May 8, 2026 | Form 4 ↗ |
| Keenan W Howard JRDirector | Sale | −2.0M | $74.50 | $149.0M | May 6, 2026 | Form 4 ↗ |
| Keenan W Howard JRDirector | Conversion | +2.0M | $0.00 | $0 | May 6, 2026 | Form 4 ↗ |
| Keenan W Howard JRDirector | Other | −2.0M | $0.00 | $0 | May 6, 2026 | Form 4 ↗ |
| KTR Management Company, LLC10% owner | Sale | −2.0M | $70.75 | $141.5M | Apr 30, 2026 | Form 4 ↗ |
| KTR Management Company, LLC10% owner | Conversion | +2.0M | $0.00 | $0 | Apr 30, 2026 | Form 4 ↗ |
| KTR Management Company, LLC10% owner | Other | −2.0M | $0.00 | $0 | Apr 30, 2026 | Form 4 ↗ |
| Wirtz Christopher P.Chief Accounting Officer | Tax withholding | −2,206 | $49.63 | $109K | Mar 1, 2026 | Form 4 ↗ |
| Wirtz Christopher P.Chief Accounting Officer | Grant / award | +1,814 | $0.00 | $0 | Mar 1, 2026 | Form 4 ↗ |
| Wirtz Christopher P.Chief Accounting Officer | Grant / award | +3,296 | $0.00 | $0 | Mar 1, 2026 | Form 4 ↗ |
Fund Holders
Mutual funds and ETFs holding SEI · SEC Form N-PORT
| Fund | Shares | Value | % of fund | As of |
|---|---|---|---|---|
| VANGUARD TOTAL STOCK MARKET INDEX FUND VANGUARD INDEX FUNDS | 1.8M | $141.8M | 0.01% | Jun 30, 2026 |
| iShares Russell 2000 ETF iShares Trust | 1.4M | $110.3M | 0.13% | Jun 30, 2026 |
| VanEck Oil Services ETF VanEck ETF Trust | 1.3M | $103.5M | 5.20% | Jun 30, 2026 |
| VANGUARD EXTENDED MARKET INDEX FUND VANGUARD INDEX FUNDS | 629.7K | $50.7M | 0.05% | Jun 30, 2026 |
| PGIM Jennison Small Company Fund Prudential Jennison Small Co Fund, Inc. | 570.1K | $45.9M | 1.32% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF iShares Trust | 493.2K | $39.7M | 0.26% | Jun 30, 2026 |
| Oberweis Small-Cap Opportunities Fund OBERWEIS FUNDS | 471.4K | $37.9M | 1.34% | Jun 30, 2026 |
| T. Rowe Price New Horizons Fund, Inc. | 463.3K | $37.3M | 0.25% | Jun 30, 2026 |
| BlackRock Strategic Income Opportunities Portfolio BlackRock Funds V | 403.8K | $32.5M | 0.07% | Jun 30, 2026 |
| Fidelity Small Cap Index Fund Fidelity Salem Street Trust | 584.2K | $30.0M | 0.09% | Jul 31, 2026 |
Mutual funds and ETFs whose N-PORT filings list SEI's shares (CUSIP 83418M103), each fund at its latest report since Mar 7, 2026, largest positions first. Bonds, options and short positions are left out.
Activist & Passive Stakes
Schedule 13D / 13G beneficial-ownership filings
- YORKTOWN X ASSOCIATES LLCSCHEDULE 13G/A · passive (13G) · 5.1M shares7.2%
Aug 14, 2026 · ↗ - YORKTOWN X COMPANY LPSCHEDULE 13G/A · passive (13G) · 5.1M shares7.2%
Aug 14, 2026 · ↗ - YORKTOWN ENERGY PARTNERS X, L.P.SCHEDULE 13G/A · passive (13G) · 5.1M shares7.2%
Aug 14, 2026 · ↗ - BlackRock, Inc.SCHEDULE 13G/A · passive (13G) · 8.0M shares13.1%
Aug 6, 2026 · ↗ - BlackRock, Inc.SCHEDULE 13G/A · passive (13G) · 4.1M shares7.0%
Jul 30, 2026 · ↗ - Encompass Capital Partners LLCSCHEDULE 13G/A · passive (13G) · 1.4M shares2.4%
May 15, 2026 · ↗ - Todd J. KantorSCHEDULE 13G/A · passive (13G) · 1.8M shares3.0%
May 15, 2026 · ↗ - Encompass Capital Advisors LLCSCHEDULE 13G/A · passive (13G) · 1.8M shares3.0%
May 15, 2026 · ↗ - Abigail P. JohnsonSCHEDULE 13G/A · passive (13G) · 2.0M shares3.8%
May 6, 2026 · ↗ - FMR LLCSCHEDULE 13G/A · passive (13G) · 2.0M shares3.8%
May 6, 2026 · ↗
Corporate Lobbying
Estimated quarterly lobbying spending reported under the LDA, filings naming Solaris Energy Infrastructure, Inc. as client
No lobbying filings found naming Solaris Energy Infrastructure, Inc. as the client.
Government Contracts
Federal awards to Solaris Energy Infrastructure, Inc. · USAspending
No federal contract awards found for Solaris Energy Infrastructure, Inc..
U.S. Patents
Recent USPTO applications naming Solaris Energy Infrastructure, Inc.
No USPTO patent applications found for Solaris Energy Infrastructure, Inc..
Annual Financials
From SEI's 10-K filings · XBRL
No annual XBRL figures on record for SEI. KeyVex's fundamentals cover about 130 large companies so far.
Stock Splits
Every split and reverse split in the price history
No stock splits in SEI's price history.
Material Events (8-K)
Corporate events filed with the SEC
- 8-K · Items 1.01, 2.03, 9.01Material agreement · Direct financial obligationOct 1, 2026
EDGAR ↗ - 8-K · Items 1.01, 8.01, 9.01Material agreement · Other eventsSep 23, 2026
EDGAR ↗ - 8-K · Items 7.01, 8.01, 9.01Reg FD disclosure · Other eventsSep 22, 2026
EDGAR ↗ - 8-K · Items 1.01, 2.01, 3.02, 7.01, 9.01Material agreement · Acquisition or disposition · Unregistered sale of equitySep 8, 2026
EDGAR ↗ - 8-K · Items 2.02, 9.01Results of operationsAug 5, 2026
EDGAR ↗ - 8-K · Items 3.02, 7.01, 9.01Unregistered sale of equity · Reg FD disclosureJul 6, 2026
EDGAR ↗ - 8-K · Items 5.07Shareholder voteMay 19, 2026
EDGAR ↗ - 8-K · Items 1.01, 1.02, 2.03, 9.01Material agreement · Termination of agreement · Direct financial obligationMay 12, 2026
EDGAR ↗ - 8-K · Items 1.01, 8.01, 9.01Material agreement · Other eventsMay 6, 2026
EDGAR ↗ - 8-K · Items 7.01, 8.01, 9.01Reg FD disclosure · Other eventsMay 5, 2026
EDGAR ↗
About Solaris Energy Infrastructure, Inc.
From SEC EDGAR company records
Industry (SIC 3533)Oil & Gas Field Machinery & Equipment
SectorIndustrials
HeadquartersHOUSTON, TX
IncorporatedDE
SEC CIK0001697500 ↗
Former namesSolaris Oilfield Infrastructure, Inc.