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CUSIP: 629491101 Class: COM

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

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

Q3 2013
Shares 1,085,884 Value ($000) $45,581 Avg Close — Range —
Q2 2013
Shares 1,182,142 Value ($000) $48,946 Avg Close — Range —