[SCHEDULE 13G/A] Trex Company, Inc. SEC Filing

Rhea-AI Filing Summary

Wasatch Advisors LP reports beneficial ownership of 5,185,652 shares of Trex Co Inc common stock (CUSIP 89531P105), equal to 4.8% of the outstanding class. The filer discloses sole voting power over 3,541,341 shares and sole dispositive power over 5,185,652 shares, with no shared voting or dispositive powers reported.

Wasatch is identified as an investment adviser (IA) and certifies the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer.

Positive

• Transparent disclosure of beneficial ownership: 5,185,652 shares (4.8%) reported for Trex common stock.
• Clear voting/dispositive breakdown: sole voting power on 3,541,341 shares and sole dispositive power on 5,185,652 shares; no shared powers reported.

Negative

• None.

Insights

Financial Analyst

TL;DR: Wasatch holds a non-controlling 4.8% stake in TREX with sole dispositive power; filing indicates passive intent.

The Schedule 13G/A discloses a meaningful minority stake but below the 5% threshold that typically triggers broader activist scrutiny. Reporting sole dispositive power over all 5,185,652 shares means Wasatch controls sales of the position, while retained sole voting power on 3,541,341 shares shows partial voting concentration. The certification that shares are held in the ordinary course and not to influence control is consistent with a passive, portfolio-positioning disclosure rather than an intention to effect corporate control.

Corporate Governance Expert

TL;DR: Filing shows passive ownership and limited governance influence given sub-5% stake and no shared control.

From a governance perspective, the absence of shared voting or dispositive powers and the explicit certification against holding the securities to influence control limit immediate governance implications. The sole voting power reported on a subset of the position could matter for specific shareholder votes where turnout and vote margins are tight, but the overall 4.8% stake is below common thresholds for material control influence. This is a routine disclosure from an investment adviser complying with reporting rules.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

TREX CO INC

(Name of Issuer)

Common Stock

(Title of Class of Securities)

89531P105

(CUSIP Number)

06/30/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 89531P105

1

Names of Reporting Persons

WASATCH ADVISORS LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,541,341.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 5,185,652.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,185,652.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.8 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: TREX CO INC
(b)	Address of issuer's principal executive offices: 2500 TREX WAY, 2500 TREX WAY, WINCHESTER, VIRGINIA, 22601.
Item 2.
(a)	Name of person filing: Wasatch Advisors LP
(b)	Address or principal business office or, if none, residence: 505 Wakara Way, 3rd Floor, Salt Lake City, 84108, United States
(c)	Citizenship: DELAWARE
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 89531P105
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 5,185,652
(b)	Percent of class: 4.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 3,541,341
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 5,185,652
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

WASATCH ADVISORS LP

Signature:	Mike Yeates
Name/Title:	CEO
Date:	08/14/2025

FAQ

How many TREX shares does Wasatch Advisors LP own?

Wasatch Advisors LP owns 5,185,652 shares of Trex common stock, representing 4.8% of the class.

What voting and dispositive powers does Wasatch report for TREX?

Sole voting power for 3,541,341 shares and sole dispositive power for 5,185,652 shares; no shared voting or dispositive powers are reported.

Does the filing indicate Wasatch intends to influence control of Trex (TREX)?

No. The filing certifies the securities were acquired and are held in the ordinary course of business and were not acquired to change or influence control of the issuer.

What type of filer is Wasatch Advisors LP in this Schedule 13G/A for TREX?

Wasatch Advisors LP is reported as an Investment Adviser (IA) organized in Delaware.

Is Wasatch filing as part of a group or reporting shared ownership for TREX?

No. The filing indicates it is not a group and reports no shared voting or dispositive powers.