PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

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

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

Q4 2018
Shares 17,000 Value ($000) $55 Avg Close — Range —
Q2 2017
Shares 37,642 Value ($000) $176 Avg Close — Range —
Q1 2017
Shares 4,400 Value ($000) $34 Avg Close — Range —