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 Q4 2017?

99 institutional investors reported SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value for Q4 2017. Use the holders table for investor-level position and value details.

CUSIP: 83418M103

Q4 2017 13F Holders as of 31 Dec 2017

Security type / class: Equity / Class A Common Stock, $0.01 par value
Total 13F shares: 29,647,208
Total 13F value: $634,773,241
Share change: +4,871,142
SEC-reported price per share: $21.41
Number of holders: 99
Value change: +$108,694,736
Number of buys: 77
Number of sells: 19
Shares outstanding: 58,139,535

Security key

83418M103

Report period

Q4 2017

Institutions

Top holders

SEI full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2018 Previous quarter: Q3 2017 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: Q1 2018 Previous quarter: Q3 2017

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

Yorktown Energy Partners ...

Comparable rows

15/15

Latest evidence

30 Sep 2017

13F Lead comparable stake: 26% Showing 1-6 of 15 holder rows.

Quick read

Yorktown Energy Partners X, L.P. leads the comparable SEC ownership view at 26%.

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. 26%

GILDER GAGNON HOWE & CO LLC 2.6%

ADAGE CAPITAL PARTNERS GP, L.L.C. 2.2%

SCHRODER INVESTMENT MANAGEMENT GROUP 1.3%

JENNISON ASSOCIATES LLC 1.2%

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.	13F Company 13F	26%	$261,848,000 15,022,823 shares	—	30 Sep 2017
GILDER GAGNON HOWE & CO LLC	13F Company 13F	2.6%	$26,304,000 1,509,110 shares	—	30 Sep 2017
ADAGE CAPITAL PARTNERS GP, L.L.C.	13F Company 13F	2.2%	$22,223,000 1,275,000 shares	—	30 Sep 2017
SCHRODER INVESTMENT MANAGEMENT GROUP	13F Company 13F	1.3%	$13,204,000 754,515 shares	—	30 Sep 2017
JENNISON ASSOCIATES LLC	13F Company 13F	1.2%	$12,299,000 705,620 shares	—	30 Sep 2017
BlackRock Finance, Inc.	13F Company 13F	1.1%	$11,229,000 644,256 shares	—	30 Sep 2017

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 Q4 2017

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

Institutions

29,647,208

Rows available

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 Q4 2017 vs Q3 2017 Across Filers

Q3 2017 holders

Q4 2017 holders

Holder diff

Investor	Q3 2017 Shares	Q4 2017 Shares	Share Diff	Share Chg %	Q3 2017 value	Q4 2017 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend