MAST THERAPEUTICS INC

CUSIP: 576314108 Class: COM

FMR LLC's Holding History (CIK: 0000315066)

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

Q3 2013
Shares 1,047,304 Value ($000) $460 Avg Close — Range —
Q2 2013
Shares 1,048,304 Value ($000) $450 Avg Close — Range —