MAST THERAPEUTICS INC

CUSIP: 576314108 Class: COM

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

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

Q4 2015
Shares 116,224 Value ($000) $49 Avg Close — Range —
Q3 2015
Shares 218,303 Value ($000) $127 Avg Close — Range —
Q2 2015
Shares 218,303 Value ($000) $107 Avg Close — Range —
Q1 2015
Shares 220,903 Value ($000) $107 Avg Close — Range —
Q4 2014
Shares 220,903 Value ($000) $124 Avg Close — Range —
Q3 2014
Shares 233,685 Value ($000) $130 Avg Close — Range —
Q2 2014
Shares 265,156 Value ($000) $167 Avg Close — Range —
Q1 2014
Shares 267,698 Value ($000) $182 Avg Close — Range —
Q4 2013
Shares 267,698 Value ($000) $124 Avg Close — Range —
Q3 2013
Shares 294,032 Value ($000) $129 Avg Close — Range —
Q2 2013
Shares 296,432 Value ($000) $127 Avg Close — Range —