TREX CO INC

Ticker: TREX CUSIP: 89531P105 Class: Common Stock

Granahan Investment Management, LLC's Holding History (CIK: 0001026710)

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

Q4 2017

Shares 2,727 Value ($000) $296 Avg Close $25.45 Range $20.91 - $29.66

Q3 2017

Shares 2,727 Value ($000) $246 Avg Close $19.06 Range $16.75 - $22.52

Q4 2015

Shares 15,100 Value ($000) $574 Avg Close $10.02 Range $8.43 - $11.04

Q3 2015

Shares 39,400 Value ($000) $1,313 Avg Close $10.27 Range $7.93 - $12.54

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2017	2,727	$296	$25.45	$20.91 - $29.66
Q3 2017	2,727	$246	$19.06	$16.75 - $22.52
Q4 2015	15,100	$574	$10.02	$8.43 - $11.04
Q3 2015	39,400	$1,313	$10.27	$7.93 - $12.54