SYSTEM1 INC

Ticker: SST CUSIP: 87200P208 Class: Common Stock

Tower Research Capital LLC (TRC)'s Holding History (CIK: 0001533421)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 988 Value ($000) $4 Avg Close $5.17 Range $3.08 - $9.30

Q3 2025

Shares 640 Value ($000) $5 Avg Close $6.91 Range $4.95 - $9.27

Q2 2025

Shares 2,580 Value ($000) $14 Avg Close $4.44 Range $2.90 - $15.00

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	988	$4	$5.17	$3.08 - $9.30
Q3 2025	640	$5	$6.91	$4.95 - $9.27
Q2 2025	2,580	$14	$4.44	$2.90 - $15.00