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 2018?

103 institutional investors reported SEI - Solaris Energy Infrastructure, Inc. - Class A Common Stock, $0.01 par value for Q4 2018. Use the holders table for investor-level position and value details.

CUSIP: 83418M103

Q4 2018 13F Holders as of 31 Dec 2018

Security type / class: Equity / Class A Common Stock, $0.01 par value
Total 13F shares: 29,290,558
Total 13F value: $354,114,534
Share change: -7,677,661
Put/Call ratio: 272%
SEC-reported price per share: $12.09
Number of holders: 103
Value change: -$176,798,425
Number of buys: 59
Number of sells: 48
Shares outstanding: 58,139,535

Security key

83418M103

Report period

Q4 2018

Institutions

103

Top holders

SEI full security history Ownership snapshot Full 13F holder table Newer quarter: Q1 2019 Previous quarter: Q3 2018 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 2019 Previous quarter: Q3 2018

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 2018

13F Lead comparable stake: 19% Showing 1-6 of 15 holder rows.

Quick read

Yorktown Energy Partners X, L.P. leads the comparable SEC ownership view at 19%.

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. 19%

FRED ALGER MANAGEMENT, LLC 4.3%

TimesSquare Capital Management, LLC 3.6%

BlackRock Finance, Inc. 2.9%

JANUS HENDERSON GROUP PLC 2.6%

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	19%	$206,925,000 10,954,234 shares	—	30 Sep 2018
FRED ALGER MANAGEMENT, LLC	13F Company 13F	4.3%	$46,685,000 2,471,391 shares	—	30 Sep 2018
TimesSquare Capital Management, LLC	13F Company 13F	3.6%	$39,148,000 2,072,420 shares	—	30 Sep 2018
BlackRock Finance, Inc.	13F Company 13F	2.9%	$32,128,000 1,700,801 shares	—	30 Sep 2018
JANUS HENDERSON GROUP PLC	13F Company 13F	2.6%	$28,517,000 1,509,649 shares	—	30 Sep 2018
SCHRODER INVESTMENT MANAGEMENT GROUP	13F Company 13F	2.4%	$26,764,000 1,416,848 shares	—	30 Sep 2018

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 2018

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

Institutions

103

29,290,558

Rows available

103

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 2018 vs Q3 2018 Across Filers

Q3 2018 holders

107

Q4 2018 holders

103

Holder diff

-4

Investor	Q3 2018 Shares	Q4 2018 Shares	Share Diff	Share Chg %	Q3 2018 value	Q4 2018 value	Value change	Value Chg %

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

Quarterly Holders Trend

Quarterly Value Trend

Quarterly Shares Trend