Company · Ownership research

Solaris Energy Infrastructure, Inc. SEI

CIK 0001697500 · CUSIP 83418M103

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 83418M103 (SEI), not CUSIP 83418M953 (SEI), CUSIP 83418M903 (SEI), and does not merge CUSIPs.

This page lists the top 20 of 363 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$232.96M 4,122,436 shares	0.00%	-189.53K(-4.40%)Reduced	SEC filing ↗ May 13, 2026	▾
02	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$129.16M 2,285,544 shares	0.10%	+440.49K(+23.90%)Added	SEC filing ↗ May 15, 2026	▾
03	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$115.31M 2,040,451 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
04	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$110.45M 1,954,455 shares	0.08%	+712.74K(+57.40%)Added	SEC filing ↗ May 15, 2026	▾
05	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$109.72M 1,941,546 shares	0.09%	+861.62K(+79.80%)Added	SEC filing ↗ May 15, 2026	▾
06	FMR LLC CIK 315066 · View history	$105.25M 1,862,561 shares	0.01%	-427.00K(-18.60%)Reduced	SEC filing ↗ May 15, 2026	▾
07	Encompass Capital Advisors LLC CIK 1541901 · View history	$98.89M 1,750,000 shares	4.03%	-809.54K(-31.60%)Reduced	SEC filing ↗ May 15, 2026	▾
08	SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC CIK 1638555 · View history	$97.71M 1,729,055 shares	4.52%	-347.27K(-16.70%)Reduced	SEC filing ↗ May 15, 2026	▾
09	MORGAN STANLEY CIK 895421 · View history	$96.49M 1,707,455 shares	0.01%	-383.91K(-18.40%)Reduced	SEC filing ↗ May 15, 2026	▾
10	Driehaus Capital Management LLC CIK 938206 · View history	$92.01M 1,628,174 shares	0.68%	+400.45K(+32.60%)Added	SEC filing ↗ May 15, 2026	▾
11	JANE STREET GROUP, LLC CIK 1595888 · View history	$88.63M 1,568,463 shares	0.10%	-72.55K(-4.40%)Reduced	SEC filing ↗ May 12, 2026	▾
12	MARSHALL WACE, LLP CIK 1318757 · View history	$83.08M 1,470,242 shares	0.09%	+632.13K(+75.40%)Added	SEC filing ↗ May 15, 2026	▾
13	STATE STREET CORP CIK 93751 · View history	$76.59M 1,355,346 shares	0.00%	+181.15K(+15.40%)Added	SEC filing ↗ May 15, 2026	▾
14	Advent International, L.P. CIK 1034196 · View history	$70.15M 1,241,362 shares	1.65%	-22.45K(-1.80%)Reduced	SEC filing ↗ May 15, 2026	▾
15	JENNISON ASSOCIATES LLC CIK 53417 · View history	$66.67M 1,179,736 shares	0.05%	+805.32K(+215.10%)Added	SEC filing ↗ May 6, 2026	▾
16	PRINCIPAL FINANCIAL GROUP INC CIK 1126328 · View history	$64.68M 1,144,652 shares	0.03%	-321.69K(-21.90%)Reduced	SEC filing ↗ May 4, 2026	▾
17	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$64.07M 1,133,863 shares	0.01%	-748.98K(-39.80%)Reduced	SEC filing ↗ May 15, 2026	▾
18	Valiant Capital Management, L.P. CIK 1452689 · View history	$63.26M 1,119,503 shares	4.98%	+385.00K(+52.40%)Added	SEC filing ↗ May 15, 2026	▾
19	Situational Awareness Partners LP CIK 2038540 · View history	$62.47M 1,105,551 shares	1.62%	—	SEC filing ↗ May 18, 2026	▾
20	Situational Awareness LP CIK 2045724 · View history	$62.47M 1,105,551 shares	1.62%	-760.95K(-40.80%)Reduced	SEC filing ↗ May 18, 2026	▾

Showing 20 / 363 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

363

Cancelled or null records excluded

Disclosed shares

65,249,036

Not deduplicated across managers

Disclosed value

$3.69B

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Solaris Energy Infrastructure, Inc. · Q1 2026

Explore all 363 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.