PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

Trexquant Investment LP's Holding History (CIK: 0001633445)

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

Q1 2018
Shares 31,296 Value ($000) $149 Avg Close — Range —
Q1 2017
Shares 19,790 Value ($000) $155 Avg Close — Range —
Q4 2016
Shares 19,600 Value ($000) $240 Avg Close — Range —