COGENT BIOSCIENCES INC

Ticker: COGT CUSIP: 19240Q201 Class: Common Stock

Siren, L.L.C.'s Holding History (CIK: 0002005245)

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

Q4 2025

Shares 1,629,279 Value ($000) $57,872 Avg Close $28.11 Range $13.78 - $43.73

Q3 2025

Shares 1,724,279 Value ($000) $24,761 Avg Close $11.85 Range $7.07 - $14.54

Q2 2025

Shares 854,379 Value ($000) $6,134 Avg Close $5.54 Range $3.72 - $7.83

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,629,279	$57,872	$28.11	$13.78 - $43.73
Q3 2025	1,724,279	$24,761	$11.85	$7.07 - $14.54
Q2 2025	854,379	$6,134	$5.54	$3.72 - $7.83