PROTEOSTASIS THERAPEUTICS IN

CUSIP: 74373B109 Class: COM

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

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

Q1 2019
Shares 53,669 Value ($000) $68 Avg Close — Range —
Q4 2018
Shares 53,669 Value ($000) $174 Avg Close — Range —
Q3 2018
Shares 38,515 Value ($000) $93 Avg Close — Range —
Q2 2018
Shares 38,515 Value ($000) $107 Avg Close — Range —
Q1 2017
Shares 16,083 Value ($000) $126 Avg Close — Range —
Q4 2016
Shares 16,483 Value ($000) $202 Avg Close — Range —
Q3 2016
Shares 16,883 Value ($000) $263 Avg Close — Range —
Q2 2016
Shares 13,283 Value ($000) $161 Avg Close — Range —