ATRECA INC

CUSIP: 04965G109 Class: COMMON

GROUP ONE TRADING, L.P.'s Holding History (CIK: 0000932540)

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

Q2 2023
Shares 5,000 Value ($000) $5 Avg Close — Range —
Q1 2023
Shares 5,000 Value ($000) $6 Avg Close — Range —
Q1 2022
Shares 35,345 Value ($000) $112 Avg Close — Range —
Q4 2021
Shares 27,663 Value ($000) $84 Avg Close — Range —
Q3 2021
Shares 34,211 Value ($000) $213 Avg Close — Range —
Q2 2021
Shares 40,130 Value ($000) $342 Avg Close — Range —
Q1 2021
Shares 3,557 Value ($000) $55 Avg Close — Range —