PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

MUFG Americas Holdings Corp's Holding History (CIK: 0001011659)

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

Q4 2017
Shares 615 Value ($000) $4 Avg Close — Range —
Q3 2017
Shares 990 Value ($000) $2 Avg Close — Range —
Q2 2017
Shares 526 Value ($000) $2 Avg Close — Range —