Director Andrew B. Rose receives 700-share stock award at Trex (NYSE: TREX)

Rhea-AI Filing Summary

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

Director Andrew B. Rose received an award of 700 shares of Trex Co Inc common stock on April 1, 2026. The shares were granted as a restricted stock unit award priced at $36.57 per share for reporting purposes.

The award will vest on the first anniversary of the grant, meaning the director earns full ownership over time rather than immediately. After this award, Rose directly holds 14,883 shares of Trex common stock, reinforcing that this filing reflects a compensation-related equity grant rather than an open-market trade.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider ROSE B ANDREW

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	700	$36.57	$26K

Holdings After Transaction: Common Stock — 14,883 shares (Direct)

Footnotes (1)

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Key Figures

Shares granted: 700 shares Grant valuation price: $36.57 per share Shares held after award: 14,883 shares

3 metrics

Shares granted 700 shares Restricted stock unit award on April 1, 2026

Grant valuation price $36.57 per share Reported price for the 700-share award

Shares held after award 14,883 shares Total Trex common stock directly owned post-transaction

Key Terms

restricted stock unit, Form 4, grant, award, or other acquisition

3 terms

restricted stock unit financial

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

A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.

Form 4 regulatory

"The filing classifies this as a grant or award acquisition in Form 4"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

grant, award, or other acquisition regulatory

"transaction code description is Grant, award, or other acquisition"

Form 4 Insider Transactions: What Each Field Means →

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)
04/01/2026

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	04/01/2026		A(1)		700	A	$36.57	14,883	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	04/03/2026
	** 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)

FAQ

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

Andrew B. Rose reported receiving an equity award of 700 shares of Trex common stock. The filing classifies this as a grant or award acquisition, reflecting stock-based compensation rather than an open-market purchase or sale of existing shares.

At what price was Andrew B. Rose’s Trex (TREX) stock award valued?

The 700-share award to Andrew B. Rose was valued at $36.57 per share. This price is used for reporting purposes and helps quantify the size of the restricted stock unit grant disclosed in the Form 4 filing.

When will Andrew B. Rose’s TREX restricted stock units vest?

The restricted stock unit award to Andrew B. Rose will vest on the first anniversary of the grant. This means he gains full ownership of the awarded shares after one year, aligning the compensation with continued service over that period.

How many TREX shares does Andrew B. Rose hold after this transaction?

Following the 700-share award, Andrew B. Rose directly holds 14,883 shares of Trex common stock. This total reflects his direct position reported after the grant and helps show the scale of this award relative to his overall holdings.

Was Andrew B. Rose’s TREX transaction a market buy or sell?

The transaction was not a market buy or sell; it was a grant or award acquisition. Trex granted 700 restricted stock units to Andrew B. Rose as compensation, so no open-market purchase or sale by him is reported in this Form 4.