GENTEX CORP

Ticker: GNTX CUSIP: 371901109 Class: COM

Portolan Capital Management, LLC's Holding History (CIK: 0001350290)

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

Q4 2015

Shares 192,656 Value ($000) $3,084 Avg Close $16.16 Range $15.29 - $16.91

Q3 2015

Shares 189,345 Value ($000) $2,935 Avg Close $15.89 Range $13.84 - $16.80

Q2 2015

Shares 118,685 Value ($000) $1,949 Avg Close $17.48 Range $16.34 - $18.55

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2015	192,656	$3,084	$16.16	$15.29 - $16.91
Q3 2015	189,345	$2,935	$15.89	$13.84 - $16.80
Q2 2015	118,685	$1,949	$17.48	$16.34 - $18.55