Solaris Energy Infrastructure, Inc. (SEI)
NYSE: SEI · Oil & Gas Field Machinery & Equipment · Houston, TX · filing with the SEC since 2017
Who owns Solaris Energy Infrastructure, Inc.
As filed with the SECHolders of 5% or more
5
Blackrock, Inc. holds 13.1% of Class A Stock, as its SCHEDULE 13G/A filed Aug 6, 2026 says.
Directors and officers
14
report now, of 18 people on the record since 2017. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 5 named at left.
Holders of 5% or moreshare of the class, as filed
Blackrock, Inc.
SCHEDULE 13G/A · filed Aug 6, 2026 · Class A Stock · 7% in Jul 30, 2026
William A. Zartler
SCHEDULE 13G/A · filed Feb 13, 2026 · Class A Common Stock, par value $0.01 per share · 12.1% in Feb 14, 2025
Solaris Energy Capital, LLC
SCHEDULE 13G/A · filed Feb 14, 2025 · Class A Common Stock, par value $0.01 per share
Yorktown Energy Partners X, L.P.
SCHEDULE 13G/A · filed Aug 14, 2026 · Class A common stock, par value $0.01 per share · 16.1% in Feb 14, 2025
Voya Financial, Inc.
SCHEDULE 13G · filed Feb 12, 2026 · Class A Common Stock, $0.01 par value
BlackRock Portfolio Management LLC
SCHEDULE 13G/A · filed Oct 17, 2025 · Class A Stock · reported falling below 5%, from 8.5% in Jul 15, 2025
Summit Partners Public Asset Management, LLC
SCHEDULE 13G/A · filed Nov 14, 2025 · Class A Common Stock, $0.01 par value · reported falling below 5%, from 5.22% in May 15, 2025
KTR Management Company, LLC
SCHEDULE 13D/A · filed Nov 6, 2025 · Class A Common Stock, par value $0.01 per share · reported falling below 5%, from 6.1% in Aug 8, 2025
Fmr LLC
SCHEDULE 13G/A · filed May 6, 2026 · CLASS A COMMON STOCK · reported falling below 5%, from 5.2% in Nov 5, 2025
Jane Street Group, LLC
SCHEDULE 13G/A · filed Feb 4, 2026 · Class A Common Stock, $0.01 par value · reported falling below 5%, from 5.1% in Dec 8, 2025
J Turbines, Inc.
SCHEDULE 13D/A · filed Jul 30, 2025 · Class A Common Stock, par value $0.01 per share · reported falling below 5%, from 13.4% in May 7, 2025
Encompass Capital Advisors LLC
SCHEDULE 13G/A · filed May 15, 2026 · Class A Common Stock, $0.01 par value · reported falling below 5%, from 5.24% in Feb 17, 2026
Dimensional Fund Advisors LP
SCHEDULE 13G/A · filed Jan 23, 2025 · Common Stock · reported falling below 5%
Driehaus Capital Management LLC
SCHEDULE 13G/A · filed Nov 14, 2025 · Common Stock · reported falling below 5%, from 5.33% in May 15, 2025
Millennium Management LLC
SCHEDULE 13G/A · filed Jul 21, 2025 · Class A Common Stock, par value $0.01 per share · reported falling below 5%, from 5% in May 15, 2025
T. Rowe Price Investment Management, Inc.
SCHEDULE 13G/A · filed May 14, 2025 · COMMON STOCK · reported falling below 5%, from 6.7% in Feb 14, 2025
The Vanguard Group
SCHEDULE 13G/A · filed Mar 27, 2026 · Common Stock · reported falling below 5%, from 6.04% in Jul 29, 2025
What SEI reports owning in othersstakes of 5% or more, and other ties
Other ties the annual report names
Hvmvlv, LLC (“Hvmvlv”)
A company bought · acquisition · Jul 2025 · owns, named in the 10-K filed Feb 27, 2026
Mobile Energy Rentals LLC ("MER Acquisition")
A company bought · acquisition · Aug 2024 · owns, named in the 10-K filed Feb 27, 2026
11 subsidiaries in 1 country, from the list filed with the 10-K filed Feb 27, 2026.
Insider tradesForm 4
10sales
10purchases
0sales on a scheduled plan
7people selling
$159Msold, in dollars
$1.3Mbought, in dollars
Open-market trades on Form 4 from Nov 12, 2025 to Nov 12, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 12, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window10 of 35 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Keenan W Howard Jr | director | 1 | $149M | 0 | 0 | $0 |
| Ktr Management Company, LLC | 10% owner | 1 | $142M | 0 | 0 | $0 |
| Walker Ray N Jr | director | 1 | $4.1M | 0 | 0 | $0 |
| Powell Christopher M | Chief Legal Officer | 3 | $2.8M | 0 | 0 | $0 |
| Durrett Cynthia M. | Chief Administrative Officer | 1 | $2.1M | 0 | 0 | $0 |
| Burke James R | director | 1 | $600,000 | 0 | 0 | $0 |
| Argo Laurie H | director | 2 | $500,000 | 0 | 0 | $0 |
| Wirtz Christopher P. | Chief Accounting Officer | 1 | $100,000 | 0 | 0 | $0 |
| Teague Aj | director | 0 | $0 | 0 | 9 | $1.2M |
| Brock Amanda M | Co-Chief Executive Officer | 0 | $0 | 0 | 1 | $200,000 |