ACCELERON PHARMA INC

CUSIP: 00434H108 Class: COMMON STOCK

EcoR1 Capital, LLC's Holding History (CIK: 0001587114)

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

Q2 2016
Shares 371,381 Value ($000) $12,620 Avg Close — Range —
Q1 2016
Shares 270,289 Value ($000) $7,133 Avg Close — Range —