[Form 4/A] Trex Company, Inc. Amended Insider Trading Activity

Rhea-AI Filing Summary

On 08/06/2025 Trex Company (TREX) officer Amy M. Fernandez—SVP, Chief Legal Officer & Secretary—filed an amended Form 4 detailing two transactions in company common stock.

• Gift (Code G): 78 shares were donated to a 501(c)(3) charitable organization; reported value $0.
• Open-market sale (Code S): 1,538 shares sold at a weighted-average $64.1817 (range $64.17–$64.19), for gross proceeds of roughly $98.8 k.

Post-transaction, Fernandez holds 22,953 shares directly. No derivative positions were reported. The disposal equals about 6-7% of her prior stake and is immaterial relative to Trex’s total shares outstanding. No operational or financial guidance accompanied the filing, indicating routine insider portfolio management with limited market impact.

Insights

Securities Analyst

TL;DR: Routine insider sale & charity gift; minimal relevance to TREX fundamentals.

The amended Form 4 shows a small disposition—1,538 shares—by a senior officer, plus a modest charitable gift. Remaining ownership of 22,953 shares signals continued alignment. Transaction size is negligible versus Trex’s float and offers no insight into near-term performance or outlook. I view the event as non-impactful for valuation or sentiment.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person^*

Fernandez Amy M.

(Last) (First) (Middle)

C/O TREX COMPANY, INC.

2500 TREX WAY

(Street)

WINCHESTER VA 22601

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TREX CO INC [ TREX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, CLO and Secretary

3. Date of Earliest Transaction (Month/Day/Year)
08/06/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)
08/06/2025

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	08/06/2025		G(1)		78	D	$0	24,491	D
Common Stock	08/06/2025		S		1,538	D	$64.1817(2)	22,953	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction involved a gift by the reporting person to a charitable organization as described in Section 501(c)(3) of the Internal Revenue Code.

2. The price reported in column 4 is a weighted average price These shares were sold in multiple transactions at prices ranging from $64.17 to $64.19, inclusive.

	/s/ Amy M. Fernandez	08/07/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many TREX shares did Amy M. Fernandez sell on 08/06/2025?

She sold 1,538 common shares according to the Form 4/A.

At what average price were the shares sold?

The weighted-average sale price was $64.1817, with trades between $64.17 and $64.19.

How many TREX shares does the insider own after the transactions?

Following the gift and sale, Amy M. Fernandez directly owns 22,953 shares of TREX common stock.

What other transaction was reported besides the stock sale?

A charitable gift of 78 shares to a 501(c)(3) organization was disclosed (Transaction Code G).

Does the Form 4 filing include any company financial updates or guidance?

No. The filing only reports insider share movements; it contains no operational or financial guidance for Trex Company.