Trex director granted 131-share stock award

Keffer David Christian reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Keffer David Christian reported acquisition or exercise transactions in this Form 4 filing.

Trex Company director David Christian Keffer reported a grant of 131 shares of Common Stock as a restricted stock unit award. The award was granted at a reference price of $48.69 per share and will vest on the first anniversary of the grant date. Following this compensation-related award, Keffer directly holds 3,555 Trex shares.

Insider Trade Summary

Grant/Award: 131 shares

Grant/Award 1 txn

Insider Keffer David Christian

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	131	$48.69	$6K

Holdings After Transaction: Common Stock — 3,555 shares (Direct)

Footnotes (1)

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

Key Figures

Shares granted: 131 shares Grant price: $48.69 per share Shares owned after grant: 3,555 shares +1 more

4 metrics

Shares granted 131 shares Restricted stock unit award to director on July 1, 2026

Grant price $48.69 per share Reference price for the 131-share award

Shares owned after grant 3,555 shares Total direct Trex holdings following the reported transaction

Vesting schedule 1-year vesting Restricted stock unit award vests on first anniversary of grant

Key Terms

restricted stock unit award, Common Stock, Grant, award, or other acquisition

3 terms

restricted stock unit award financial

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

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.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition""

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Trex (TREX) director David Christian Keffer report?

Director David Christian Keffer reported receiving a grant of 131 shares of Trex Common Stock as a restricted stock unit award. The transaction is classified as a grant or award acquisition rather than an open-market purchase or sale.

At what price was David Christian Keffer’s Trex (TREX) stock award recorded?

The 131-share award to David Christian Keffer was recorded at $48.69 per Trex share. This figure reflects the grant price used for the restricted stock unit award reported in the insider filing.

When will David Christian Keffer’s Trex (TREX) restricted stock unit award vest?

The restricted stock unit award to David Christian Keffer will vest on the first anniversary of the grant. This means the 131-share award becomes fully vested one year after the July 1, 2026 grant date, according to the filing footnote.

How many Trex (TREX) shares does David Christian Keffer hold after this award?

After receiving the 131-share award, David Christian Keffer directly holds 3,555 Trex Common Stock shares. This total ownership figure comes from the post-transaction balance disclosed in the Form 4 insider report.

Is David Christian Keffer’s Trex (TREX) transaction an open-market buy or a compensation grant?

The transaction is a compensation-related grant, not an open-market buy. It is coded as “A” for grant, award, or other acquisition, and described as a restricted stock unit award that vests after one year.

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

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Accepted by SEC EDGAR 07/06/2026 - 04:20 PM EDT Learn about SEC filing dates

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^*

Keffer David Christian

(Last) (First) (Middle)

2500 TREX WAY

C/O TREX COMPANY, INC.

(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)
07/01/2026

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	07/01/2026		A(1)		131	A	$48.69	3,555	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	07/06/2026
	** 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)