MINERALS TECHNOLOGIES INC

Ticker: MTX CUSIP: 603158106 Class: Common Stock

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

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

Q4 2015

Shares 5,143 Value ($000) $236 Avg Close $53.82 Range $43.09 - $60.63

Q3 2015

Shares 5,925 Value ($000) $285 Avg Close $55.32 Range $44.66 - $66.23

Q2 2015

Shares 4,571 Value ($000) $311 Avg Close $66.48 Range $62.78 - $71.08

Q1 2015

Shares 4,694 Value ($000) $343 Avg Close $64.85 Range $55.99 - $71.65

Q4 2014

Shares 4,694 Value ($000) $326 Avg Close $66.50 Range $54.66 - $74.50

Q3 2014

Shares 4,694 Value ($000) $290 Avg Close $59.56 Range $53.83 - $64.32

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	5,143	$236	$53.82	$43.09 - $60.63
Q3 2015	5,925	$285	$55.32	$44.66 - $66.23
Q2 2015	4,571	$311	$66.48	$62.78 - $71.08
Q1 2015	4,694	$343	$64.85	$55.99 - $71.65
Q4 2014	4,694	$326	$66.50	$54.66 - $74.50
Q3 2014	4,694	$290	$59.56	$53.83 - $64.32