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WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Position in TREX — Trex Co Inc

CIK 1644956 CHICAGO, IL

Position in TREX

as of Jun 30, 2026 · filed Aug 12, 2026
Position Value
$25,596,811
+$2,026,589 QoQ
Shares Held
511,527
-21.0% QoQ
Ownership
0.502%
of shares outstanding
% of Portfolio
0.08%
of 13F equity value
Holder Rank
#46
of 468 holders
Holding Since
Mar 2020
20 quarters on record
Voting authority Sole 62% Shared 0% None 38%

Common Shares in TREX Over Time

Shares Held

Position Value (USD)

Position in Building Products & Equipment

Industrials · as of Jun 30, 2026

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC holds $41,512,998 across 2 Building Products & Equipment names. TREX ranks #1 (61.7% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 TREX
Trex Co Inc
This page
511,527 $25,596,811

All Filings in TREX

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20 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $25,596,811 511,527
2026-03-31 $23,570,222 647,178
2024-06-30 $143,621,879 1,937,694
2024-03-31 $195,227,408 1,957,167
2023-12-31 $166,685,660 2,013,355
2023-09-30 $130,581,520 2,118,798
2023-06-30 $170,796,715 2,605,197
2023-03-31 $127,076,542 2,610,983
2022-12-31 $121,241,628 2,864,201
2022-09-30 $131,847,506 3,000,626
2022-06-30 $164,036,736 3,014,273
2022-03-31 $203,365,365 3,112,894
2021-12-31 $416,405,649 3,083,801
2021-09-30 $321,432,993 3,153,468
2021-06-30 $320,340,040 3,134,136
2021-03-31 $290,890,685 3,177,744
2020-12-31 $265,344,595 3,169,429
2020-09-30 $274,852,853 3,838,727
2020-06-30 $263,505,561 2,025,875
2020-03-31 $247,780,217 3,091,842