PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

DIMENSIONAL FUND ADVISORS LP's Holding History (CIK: 0000354204)

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

Q3 2020
Shares 18,000 Value ($000) $20 Avg Close — Range —
Q2 2020
Shares 18,000 Value ($000) $25 Avg Close — Range —
Q1 2020
Shares 73,968 Value ($000) $84 Avg Close — Range —
Q4 2019
Shares 18,000 Value ($000) $41 Avg Close — Range —
Q2 2019
Shares 26,363 Value ($000) $26 Avg Close — Range —
Q1 2019
Shares 26,363 Value ($000) $33 Avg Close — Range —
Q4 2018
Shares 26,363 Value ($000) $85 Avg Close — Range —
Q3 2018
Shares 37,027 Value ($000) $89 Avg Close — Range —
Q2 2018
Shares 37,027 Value ($000) $103 Avg Close — Range —
Q1 2018
Shares 37,027 Value ($000) $176 Avg Close — Range —
Q4 2017
Shares 48,531 Value ($000) $283 Avg Close — Range —
Q3 2017
Shares 48,531 Value ($000) $102 Avg Close — Range —
Q2 2017
Shares 63,153 Value ($000) $296 Avg Close — Range —