Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (SEI)

Q: What does CUSIP 83418M103 represent in this 13F holders report?

CUSIP 83418M103 is the security identifier for SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value used to aggregate holder disclosures.

Q: How many institutions held SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value in Q3 2025?

270 institutional investors reported SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value for Q3 2025. Use the holders table for investor-level position and value details.

CUSIP: 83418M103

Q3 2025 13F Holders as of 30 Sep 2025

Security type / class: Equity / Class A Common Stock, $0.01 par value
Total 13F shares: 55,288,645
Total 13F value: $2,209,741,534
Share change: +7,369,255
Put/Call ratio: 338%
SEC-reported price per share: $39.97
Number of holders: 270
Value change: +$322,770,067
Number of buys: 167
Number of sells: 104
Shares outstanding: 58,139,535

Security key

83418M103

Report period

Q3 2025

Institutions

270

Top holders

SEI full security history Ownership snapshot Full 13F holder table Newer quarter: Q4 2025 Previous quarter: Q2 2025 Solaris Energy Infrastructure, Inc. SEC filings Solaris Energy Infrastructure, Inc. company facts

Broader feeds

Latest 13F filings Latest 13D/G filings Investors directory

Reporting periods

Holder history for CUSIP 83418M103

Newer quarter: Q4 2025 Previous quarter: Q2 2025

Recent filing periods:

Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024

Ownership snapshot

Top reported holders of SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

Yorktown Energy Partners ...

Disclosed value leader

BlackRock, Inc.

Comparable rows

15/15

Latest evidence

30 Sep 2025

3/4/5 13D/G 13F Lead comparable stake: 16% 13D/G row: Yorktown Energy Partners X, L.P. Showing 1-6 of 15 holder rows.

Quick read

Yorktown Energy Partners X, L.P. leads the comparable SEC ownership view at 16%.

15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens Yorktown Energy Partners X, L.P.'s linked filing trail.

Comparable ownership Top 5

Yorktown Energy Partners X, L.P. 16%

Solaris Energy Capital, LLC 8.5%

VANGUARD GROUP INC 6%

BlackRock, Inc. 5.6%

BlackRock Portfolio Management LLC 4.9%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-6 of 15 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
Yorktown Energy Partners X, L.P.	3/4/5 13D/G 10%+ Owner 3/4/5 13D/G	16% from 13D/G	$169,954,710 14,158,468 shares mixed-class rows	—	16 Dec 2024
Solaris Energy Capital, LLC	13D/G 13D/G	8.5%	$72,834,772 3,513,496 shares	$0	31 Dec 2024
VANGUARD GROUP INC	13D/G 13F The Vanguard Group · Company 13D/G 13F	6%	$69,051,618 2,440,849 shares	+$23,469,922	30 Jun 2025
BlackRock, Inc.	13F 13D/G Company 13F 13D/G	5.6% from 13D/G	$173,555,000 6,134,853 shares	—	30 Jun 2025
BlackRock Portfolio Management LLC	13D/G 13D/G	4.9%	$86,965,247 2,175,763 shares	-$50,313,357	30 Sep 2025
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC	13D/G 13F Company 13D/G 13F	4%	$71,798,511 1,796,310 shares	-$7,575,674	30 Sep 2025

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

13F holder rows

Institutional holders as of Q3 2025

Investor-level positions for this CUSIP, loaded as an interactive table.

Institutions

270

55,288,645

Rows available

270

Investor	Option	Weight %	Change %	SEC-reported value	* Price	Shares	Share Change	Activity	Report Period

^* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.

Compare Q3 2025 vs Q2 2025 Across Filers

Q2 2025 holders

210

Q3 2025 holders

270

Holder diff

Investor	Q2 2025 Shares	Q3 2025 Shares	Share Diff	Share Chg %	Q2 2025 value	Q3 2025 value	Value change	Value Chg %

Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend