PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

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

Q1 2019
Shares 45,609 Value ($000) $57 Avg Close — Range —
Q4 2018
Shares 60,498 Value ($000) $196 Avg Close — Range —