GRITSTONE BIO INC

CUSIP: 39868T105 Class: Common Stock

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

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

Q4 2021
Shares 6,012,232 Value ($000) $77,317 Avg Close — Range —
Q3 2021
Shares 5,560,748 Value ($000) $60,056 Avg Close — Range —
Q2 2021
Shares 3,421,287 Value ($000) $31,236 Avg Close — Range —
Q1 2021
Shares 3,421,287 Value ($000) $32,263 Avg Close — Range —
Q4 2020
Shares 3,421,287 Value ($000) $13,480 Avg Close — Range —