Trex Company (NYSE: TREX) director receives 1,629-share restricted stock award

Rhea-AI Filing Summary

ROSE B ANDREW reported acquisition or exercise transactions in this Form 4 filing.

TREX CO INC director Andrew B. Rose reported a grant of 1,629 shares of common stock as a restricted stock unit award on 2026-07-29. The award will vest on the first anniversary of the grant, bringing his direct holdings to 17,038 shares.

Insider Trade Summary

Net Buyer: 1,629 shares

Net Buy 1 txn

Insider ROSE B ANDREW

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	1,629	$42.39	$69K

Holdings After Transaction: Common Stock — 17,038 shares (Direct)

Footnotes (1)

1. F1. This restricted stock unit award will vest on the first anniversary of the grant.

Key Figures

Shares granted: 1,629 shares Grant reference price: $42.39 per share Shares owned after grant: 17,038 shares

3 metrics

Shares granted 1,629 shares Grant of common stock as a restricted stock unit award on 2026-07-29

Grant reference price $42.39 per share Reported per-share value associated with the 1,629-share award

Shares owned after grant 17,038 shares Director’s direct holdings following the reported award

Key Terms

restricted stock unit award

1 terms

restricted stock unit award financial

"This restricted stock unit award will vest on the first anniversary"

A restricted stock unit award is a promise by a company to give an employee a specified number of company shares at a future date if certain conditions are met, such as staying with the company or hitting performance goals. For investors, these awards matter because they can increase the total number of shares outstanding when converted, diluting existing holders, and they align employees’ incentives with shareholders’ interests much like giving a rising bonus that becomes real only after conditions are satisfied.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 07/30/2026 - 07:55 PM Accepted by SEC EDGAR 07/30/2026 - 07:55 PM Learn about SEC filing dates

FAQ

What insider transaction did TREX (TREX) director Andrew B. Rose report?

Director Andrew B. Rose reported receiving a grant of 1,629 shares of Trex common stock as a restricted stock unit award on 2026-07-29, increasing his direct holdings to 17,038 shares after the award.

How many TREX (TREX) shares were included in Andrew B. Rose’s award?

The award to Andrew B. Rose covered 1,629 shares of Trex common stock. These shares are structured as a restricted stock unit award that will vest on the first anniversary of the grant, rather than an open-market purchase or sale.

What is the vesting schedule of Andrew B. Rose’s TREX (TREX) restricted stock unit award?

The filing states the restricted stock unit award will vest on the first anniversary of the grant. This means the 1,629-share award is subject to a one-year vesting period from the 2026-07-29 grant date before fully vesting.

What are Andrew B. Rose’s direct TREX (TREX) holdings after this transaction?

Following the reported award, Andrew B. Rose directly holds 17,038 shares of Trex common stock. This total includes the newly granted 1,629-share restricted stock unit award, as reflected in the post-transaction holdings figure in the filing.

Was Andrew B. Rose’s TREX (TREX) share award made under a Rule 10b5-1 plan?

The filing’s Rule 10b5-1 checkbox is not marked as affirming a trading plan, indicating this grant is not reported as executed under a Rule 10b5-1 pre-arranged trading plan, but rather as a standard grant or award transaction.

What price per share is associated with Andrew B. Rose’s TREX (TREX) stock award?

The award is associated with a reported value of $42.39 per share for the 1,629-share grant. While this is shown as a per-share price in the filing, the transaction is categorized as a grant or award, not a market purchase.

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
Estimated average burden
hours per response:			0.5

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^*

ROSE B ANDREW

(Last) (First) (Middle)

C/O TREX COMPANY, INC.

2500 TREX WAY

(Street)

WINCHESTER VIRGINIA 22601

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
07/29/2026

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

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

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

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	07/29/2026		A(1)		1,629	A	$42.39	17,038	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	07/30/2026
	** 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.
* Form 4: SEC 1474 (03-26)