AILERON THERAPEUTICS INC

CUSIP: 00887A105 Class: Stock

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

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

Q1 2018
Shares 8,124 Value ($000) $66 Avg Close — Range —
Q4 2017
Shares 8,200 Value ($000) $86 Avg Close — Range —
Q3 2017
Shares 8,200 Value ($000) $110 Avg Close — Range —