STRATEGIC DIAGNOSTICS INC

CUSIP: 862700101 Class: COM

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

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

Q3 2013
Shares 497,819 Value ($000) $523 Avg Close — Range —
Q2 2013
Shares 525,666 Value ($000) $473 Avg Close — Range —