SIMPSON MFG INC

Ticker: SSD CUSIP: 829073105 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q1 2014

Shares 37,378 Value ($000) $1,321 Avg Close $29.59 Range $26.64 - $31.76

Q4 2013

Shares 36,049 Value ($000) $1,324 Avg Close $29.91 Range $26.22 - $32.23

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	37,378	$1,321	$29.59	$26.64 - $31.76
Q4 2013	36,049	$1,324	$29.91	$26.22 - $32.23