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 Q1 2026?

360 institutional investors reported SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value for Q1 2026. Use the holders table for investor-level position and value details.

CUSIP: 83418M103

Q1 2026 13F Holders as of 31 Mar 2026

Security type / class: Equity / Class A Common Stock, $0.01 par value
Total 13F shares: 65,248,516
Total 13F value: $3,686,535,549
Share change: -3,636,130
Put/Call ratio: 85%
SEC-reported price per share: $56.51
Number of holders: 360
Value change: -$146,554,492
Number of buys: 205
Number of sells: 171
Shares outstanding: 69,522,651

Security key

83418M103

Report period

Q1 2026

Institutions

360

Top holders

SEI full security history Ownership snapshot Full 13F holder table Solaris Energy Infrastructure, Inc. SEC filings Solaris Energy Infrastructure, Inc. company facts

Broader feeds

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

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

William A. Zartler

Disclosed value leader

William A. Zartler

Comparable rows

14/15

Latest evidence

31 Mar 2026

3/4/5 13D/G 13F Lead comparable stake: 10% 1 rows are not safely comparable across share classes. 13D/G row: William A. Zartler Showing 1-6 of 15 holder rows.

Quick read

William A. Zartler leads the comparable SEC ownership view at 10%.

14 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 William A. Zartler's linked filing trail.

Comparable ownership Top 5

William A. Zartler 10%

Solaris Energy Capital, LLC 8.5%

VANGUARD GROUP INC 6%

BlackRock Portfolio Management LLC 4.9%

SUMMIT PARTNERS PUBLIC ASSET MANA... 4%

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
William A. Zartler	3/4/5 13D/G Chairman and Co-CEO, Director, 10%+ Owner 3/4/5 13D/G	10% Reported 13D/G · 31 Dec 2025	$403,603,629 14,035,828 shares mixed-class rows	—	01 Mar 2026
Solaris Energy Capital, LLC	13D/G 13D/G	8.5% Reported 13D/G · 31 Dec 2024	$72,834,772 3,513,496 shares	$0	31 Dec 2024
VANGUARD GROUP INC	13F 13D/G Company · The Vanguard Group 13F 13D/G	6% Reported 13D/G · 30 Jun 2025	$133,939,663 2,913,632 shares	—	31 Dec 2025
BlackRock Portfolio Management LLC	13D/G 13D/G	4.9% Reported 13D/G · 30 Sep 2025	$86,965,247 2,175,763 shares	-$50,313,357	30 Sep 2025
SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC	13F 13D/G Company 13F 13D/G	4% Reported 13D/G · 30 Sep 2025	$95,448,614 2,076,324 shares	—	31 Dec 2025
KTR Management Company, LLC	13D/G 13D/G	3.9% Reported 13D/G · 04 Nov 2025	$79,940,000 2,000,000 shares	-$84,527,877	04 Nov 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 Q1 2026

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

Institutions

360

65,248,516

Rows available

360

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 Q1 2026 vs Q1 2026 Across Filers

Q1 2026 holders

360

Q1 2026 holders

360

Holder diff

Investor	Q1 2026 Shares	Q1 2026 Shares	Share Diff	Share Chg %	Q1 2026 value	Q1 2026 value	Value change	Value Chg %