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

Rhea-AI Filing Summary

Trex Company, Inc. (TREX) Form 4: On 07/30/2025 director Melkeya McDuffie reported the acquisition of 1,812 common shares through a transaction coded “A”, identified as a restricted stock unit (RSU) award. The filing lists a reference price of $66.23 per share. Following the grant, the director’s direct beneficial ownership doubled to 3,604 shares.

The RSU award will vest in full on the first anniversary of the grant. No derivative securities, sales or additional insider transactions were disclosed. The transaction modestly increases insider equity alignment but does not materially alter the company’s share structure.

Positive

• Director’s stake doubles to 3,604 shares, modestly enhancing insider–shareholder alignment.
• No sales or hedging activity disclosed, removing potential negative sentiment.

Negative

• Transaction is an RSU grant rather than an open-market purchase, so it conveys weaker conviction.
• Small size (~$120k) is immaterial relative to company value, limiting market significance.

Insights

Financial Analyst

TL;DR: Director accepted 1,812 RSUs; ownership now 3,604 shares—symbolic alignment boost, limited market impact.

The filing shows a routine annual equity grant rather than an open-market purchase, suggesting compensation, not opportunistic buying. At roughly $120 k market value, the transaction is immaterial versus TREX’s multibillion-dollar capitalization, so price impact should be negligible. Still, the doubling of McDuffie’s holdings improves governance optics by tying a director’s wealth to shareholder returns. No red flags such as sales, derivative hedges or 10b5-1 plans were disclosed, keeping the signal neutral-to-modestly positive.

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

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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).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

McDuffie Melkeya

(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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
07/30/2025

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

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	07/30/2025		A(1)		1,812	A	$66.23	3,604	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 restricted stock unit award will vest on the first anniversary of the grant.

	/s/ Amy M. Fernandez by power of attorney	07/31/2025
	** 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 (TREX) shares did Director McDuffie acquire?

The Form 4 shows an acquisition of 1,812 common shares.

What was the reported price per share in the RSU grant?

The reference price listed in the filing is $66.23 per share.

What is Director McDuffie’s total TREX shareholding after the transaction?

After the grant, the director owns 3,604 shares directly.

When will the restricted stock units vest?

The RSUs will vest on the first anniversary of the 07/30/2025 grant.

Were any shares sold or derivative securities exercised?

No. The filing reports only the RSU acquisition; no sales or derivative transactions were disclosed.