PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

COMMONWEALTH EQUITY SERVICES, LLC's Holding History (CIK: 0000312272)

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

Q3 2020
Shares 19,847 Value ($000) $21 Avg Close — Range —
Q2 2020
Shares 19,647 Value ($000) $26 Avg Close — Range —