GRITSTONE BIO INC

CUSIP: 39868T105 Class: Common Stock

Walleye Trading LLC's Holding History (CIK: 0001388391)

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

Q1 2021
Shares 26,607 Value ($000) $251 Avg Close — Range —
Q4 2020
Shares 41,366 Value ($000) $163 Avg Close — Range —
Q3 2020
Shares 84,556 Value ($000) $224 Avg Close — Range —