MINE SAFETY APPLIANCES CO

CUSIP: 602720104 Class: COMMON STOCK

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

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

Q4 2013
Shares 536,586 Value ($000) $27,478 Avg Close — Range —
Q3 2013
Shares 520,904 Value ($000) $26,883 Avg Close — Range —
Q2 2013
Shares 508,079 Value ($000) $23,651 Avg Close — Range —