GENERATION BIO CO

CUSIP: 37148K100 Class: Common Stock

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

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

Q2 2025
Shares 2,968,925 Value ($000) $950 Avg Close — Range —
Q1 2025
Shares 2,968,925 Value ($000) $1,202 Avg Close — Range —
Q4 2024
Shares 2,982,733 Value ($000) $3,162 Avg Close — Range —
Q3 2024
Shares 2,982,733 Value ($000) $7,367 Avg Close — Range —