PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

FLAGSHIP HARBOR ADVISORS, LLC's Holding History (CIK: 0001691766)

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

Q3 2020
Shares 5,000 Value ($000) $5 Avg Close — Range —
Q2 2020
Shares 5,000 Value ($000) $6 Avg Close — Range —