13F Insight
DOSSIER · 13F Holders · Q1 2026Basic Materials · Lumber & Wood Products (No Furniture)BellwetherCompounder
TREX

TREX CO INC

447 institutions still hold TREX CO INC as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 89531P105·Lumber & Wood Products (No Furniture)·447 13F holders·last filed Mar 31, 2026
Market cap
—
▲ 4.5%
vs prior quarter
13F value held
$2.4B
49.0% inst. owned
of float
Holders
447
+119 QoQ
filers reporting
Activity
+52 / −90
+1,009 added · −942 reduced
this quarter
Concentration
15.49%
BlackRock, Inc. #1
top holder share
AI Holders Summary · Q1 2026

447 institutions reported TREX in Q1 2026. BlackRock, Inc. leads at 15.5% of the visible book. +119 net new institutions vs prior quarter — accumulation reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

#HolderValueShares% port.Quarter
01
BlackRock, Inc.
CIK 0002012383
$377M10.4M0.01%Q1 202602
WELLINGTON MANAGEMENT GROUP LLP
CIK 0000902219
$304M8.4M0.06%Q1 202603
ALLIANCEBERNSTEIN L.P.
CIK 0001109448
$226M6.4M0.07%Q1 202604
VANGUARD CAPITAL MANAGEMENT LLC
CIK 0002100119· Index
$173M4.7M0.00%Q1 202605
Vanguard Portfolio Management
CIK 0002100121· Index
$163M4.5M0.01%Q1 202606
AQR CAPITAL MANAGEMENT LLC
CIK 0001167557
$153M4.2M0.07%Q1 202607
WASATCH ADVISORS LP
CIK 0000814133
$129M3.5M0.86%Q1 202608
STATE STREET CORP
CIK 0000093751
$118M3.3M0.00%Q1 202609
MORGAN STANLEY
CIK 0000895421
$78M2.1M0.00%Q1 202610
Clearbridge Investments, LLC
CIK 0001348883
$77M2.1M0.07%Q1 202611
BANK OF AMERICA CORP /DE/
CIK 0000070858
$74M2.0M0.01%Q1 202612
GEODE CAPITAL MANAGEMENT, LLC
CIK 0001214717· Index
$72M2.0M0.00%Q1 202613
CITADEL ADVISORS LLC
CIK 0001423053
$71M2.0M0.01%Q4 202514
Impax Asset Management Group plc
CIK 0001749768
$64M1.8M0.45%Q1 202615
WESTWOOD HOLDINGS GROUP INC
CIK 0001165002
$64M1.7M0.46%Q1 202616
D. E. Shaw & Co., Inc.
CIK 0001009207
$62M1.8M0.03%Q4 202517
DIMENSIONAL FUND ADVISORS LP
CIK 0000354204· Quasi-passive
$62M1.7M0.01%Q1 202618
AMERICAN CENTURY COMPANIES INC
CIK 0000748054
$61M1.7M0.03%Q1 202619
FEDERATED HERMES, INC.
CIK 0001056288
$54M1.5M0.09%Q1 202620
FULLER & THALER ASSET MANAGEMENT, INC.
CIK 0001082327
$54M1.5M0.18%Q1 2026
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