PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

Cormorant Asset Management, LP's Holding History (CIK: 0001583977)

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

Q4 2017
Shares 3,300,000 Value ($000) $19,239 Avg Close — Range —
Q3 2017
Shares 3,804,027 Value ($000) $7,988 Avg Close — Range —
Q2 2017
Shares 3,804,027 Value ($000) $17,803 Avg Close — Range —
Q1 2017
Shares 3,804,027 Value ($000) $29,747 Avg Close — Range —
Q4 2016
Shares 3,804,027 Value ($000) $46,637 Avg Close — Range —
Q3 2016
Shares 2,350,000 Value ($000) $36,636 Avg Close — Range —
Q2 2016
Shares 1,354,339 Value ($000) $16,428 Avg Close — Range —
Q1 2016
Shares 1,726,599 Value ($000) $16,644 Avg Close — Range —