PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

SABBY MANAGEMENT, LLC's Holding History (CIK: 0001535610)

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

Q1 2019
Shares 30,900 Value ($000) $39 Avg Close — Range —
Q3 2018
Shares 199,900 Value ($000) $482 Avg Close — Range —
Q4 2017
Shares 60,000 Value ($000) $350 Avg Close — Range —
Q3 2017
Shares 150,151 Value ($000) $315 Avg Close — Range —
Q2 2017
Shares 125,151 Value ($000) $586 Avg Close — Range —
Q1 2017
Shares 59,700 Value ($000) $467 Avg Close — Range —