System1, Inc. (SST) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

7,740,094Shares Outstanding

58,680Shares held by institutions

$187,189Value of institutional holdings

10.54%Institutional ownership %

-74.10%Shares Changed QoQ

23No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for System1, Inc. (NYSE:SST) includes 23 filers as of the latest reporting cycle ending December 2025.

These investors collectively held 10.5% of the company's total shares outstanding in December 2025, down from 41.2% in September 2025.
Institutional share ownership changed by -74.10% QoQ, while the number of institutional owners saw a decrease of 62.30% YoY.
The latest 13F cycle for System1 reveals that of 23 total investors, 5 funds grew their exposure, whereas 13 reduced theirs and 5 made no changes.
This class of investors decreased its holdings in System1 to 815.64K shares for the 13F-cycle ending December 2025, down by 2.33Mn shares quarter on quarter, and down 34.47Mn shares year over year.
With 356.80K shares, Cannae Holdings, Inc. commands the largest institutional position in System1 as of December 31, 2025, equating to 4.61% of the company.
Among the most significant buyers of System1 during December 2025 were XTX Topco Ltd (12.38K), CITADEL ADVISORS LLC (2.70K), RENAISSANCE TECHNOLOGIES LLC (1.50K), Tower Research Capital LLC (TRC) (348), BlackRock, Inc. (37).
Leading sellers of System1 stock in December 2025 included Cannae Holdings, Inc. (2.34Mn), MILLENNIUM MANAGEMENT LLC (3.11K), ROYAL BANK OF CANADA (1.29K), FMR LLC (815), MORGAN STANLEY (656).
The top 10 institutional holders of System1 for the quarter ending December 2025 included Cannae Holdings, Inc. (356.80K), BANK OF AMERICA CORP /DE/ (161.55K), Cerity Partners LLC (116.84K), VANGUARD GROUP INC (46.93K), MILLENNIUM MANAGEMENT LLC (35.45K), BlackRock, Inc. (24.25K), RENAISSANCE TECHNOLOGIES LLC (18.62K), GEODE CAPITAL MANAGEMENT, LLC (14.36K), CITADEL ADVISORS LLC (12.76K), XTX Topco Ltd (12.38K).

23 Institutional Holders

58,680 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
Cannae Holdings, Inc.	31 Dec, 2025	356,797	-2,344,482	-86.79%	$1,398,644.00
BANK OF AMERICA CORP /DE/	31 Dec, 2025	161,546	-24	-0.01%	$633,260.00
Cerity Partners LLC	31 Dec, 2025	116,844	-23	-0.02%	$458,028.00
VANGUARD GROUP INC	31 Dec, 2025	46,933	0	0.00%	$183,977.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	35,449	-3,112	-8.07%	$138,960.00
BlackRock, Inc.	31 Dec, 2025	24,247	37	0.15%	$95,049.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	18,620	1,500	8.76%	$72,990.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	14,363	-18	-0.13%	$56,327.00
CITADEL ADVISORS LLC	31 Dec, 2025	12,759	2,703	26.88%	$50,015.00
XTX Topco Ltd	31 Dec, 2025	12,376	12,376	0.00%	$48,514.00
STATE STREET CORP	31 Dec, 2025	11,502	0	0.00%	$45,088.00
FMR LLC	31 Dec, 2025	1,105	-815	-42.45%	$4,332.00
Tower Research Capital LLC (TRC)	31 Dec, 2025	988	348	54.37%	$3,873.00
GROUP ONE TRADING LLC	31 Dec, 2025	663	-58	-8.04%	$2,599.00
MORGAN STANLEY	31 Dec, 2025	439	-656	-59.91%	$1,721.00
UBS Group AG	31 Dec, 2025	417	-19	-4.36%	$1,635.00
Farther Finance Advisors, LLC	31 Dec, 2025	150	0	0.00%	$588.00
CWM, LLC	31 Dec, 2025	115	-13	-10.16%	$0.00
ROYAL BANK OF CANADA	31 Dec, 2025	108	-1,286	-92.25%	$0.00
BNP PARIBAS FINANCIAL MARKETS	31 Dec, 2025	86	-36	-29.51%	$337.00

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