NATIONAL TECHNICAL SYS INC

CUSIP: 638104109 Class: COM

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

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

Q3 2013
Shares 654,415 Value ($000) $14,953 Avg Close — Range —
Q2 2013
Shares 658,590 Value ($000) $9,214 Avg Close — Range —