COMERICA INC

Ticker: CMA CUSIP: 200340107 Class: EQTY

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

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

Q1 2014

Shares 45,500 Value ($000) $2,357 Avg Close $31.52 Range $28.78 - $35.16

Q4 2013

Shares 45,500 Value ($000) $2,163 Avg Close $28.67 Range $25.20 - $31.88

Q3 2013

Shares 45,500 Value ($000) $1,789 Avg Close $27.00 Range $25.15 - $28.25

Q2 2013

Shares 45,500 Value ($000) $1,812 Avg Close $24.17 Range $21.70 - $26.16

Period	Shares	Value ($000)	Average Close	Price Range
Q1 2014	45,500	$2,357	$31.52	$28.78 - $35.16
Q4 2013	45,500	$2,163	$28.67	$25.20 - $31.88
Q3 2013	45,500	$1,789	$27.00	$25.15 - $28.25
Q2 2013	45,500	$1,812	$24.17	$21.70 - $26.16