PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

SG Americas Securities, LLC's Holding History (CIK: 0001313360)

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

Q2 2019
Shares 15,671 Value ($000) $15 Avg Close — Range —
Q1 2019
Shares 10,791 Value ($000) $14 Avg Close — Range —
Q3 2016
Shares 6,723 Value ($000) $105 Avg Close — Range —