What was the reported value per share for Patricia B. Robinson’s Trex (TREX) award?

The grant was reported at a value of $42.39 per share for the 2,831 restricted stock units. This per-share amount is used to describe the grant’s value and does not necessarily indicate an open-market purchase price.

Trex Company (NYSE: TREX) awards director 2,831 restricted stock units

Q: When do Patricia B. Robinson’s new Trex (TREX) restricted stock units vest?

The filing states that the restricted stock unit award will vest on the first anniversary of the grant. This means the 2,831 units are scheduled to become fully vested and settle into shares of common stock one year after July 29, 2026.

Q: Is Patricia B. Robinson’s Trex (TREX) transaction a market purchase or a grant?

The transaction is described as a grant or award acquisition of 2,831 restricted stock units, not a market purchase. It is compensation-related equity that will vest on the first anniversary of the grant date.

Filing Impact

(Moderate)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

ROBINSON PATRICIA B reported acquisition or exercise transactions in this Form 4 filing.

Trex Co Inc director Patricia B. Robinson received a grant of 2,831 restricted stock units representing common stock on July 29, 2026, at a reported value of $42.39 per share. The award will vest on the first anniversary of the grant, after which she will directly hold 73,162 shares.

Insider Trade Summary

Net Buyer: 2,831 shares

Net Buy 1 txn

Insider ROBINSON PATRICIA B

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock ^F1	2,831	$42.39	$120K

Holdings After Transaction: Common Stock — 73,162 shares (Direct)

Footnotes (1)

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

Key Figures

Restricted stock units granted: 2,831 shares Reported grant value per share: $42.39 per share Shares held after award: 73,162 shares +1 more

4 metrics

Restricted stock units granted 2,831 shares Grant of restricted stock units representing common stock to director Patricia B. Robinson

Reported grant value per share $42.39 per share Value used for the 2,831-unit restricted stock award on July 29, 2026

Shares held after award 73,162 shares Director’s direct holdings of Trex common stock following the reported grant

Vesting period First anniversary of the grant Restricted stock unit award vests one year after the grant date

Key Terms

restricted stock unit award, vest, Common Stock

3 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.

vest financial

"will vest on the first anniversary of the grant"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

Common Stock financial

"security_title: Common Stock in the reported transaction"

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.

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 - 07:52 PM Accepted by SEC EDGAR 07/30/2026 - 07:51 PM

FAQ

What equity award did Trex (TREX) director Patricia B. Robinson receive?

Patricia B. Robinson received a grant of 2,831 restricted stock units representing Trex common stock on July 29, 2026, at a reported value of $42.39 per share, subject to a one-year vesting period from the grant date.

When do Patricia B. Robinson’s new Trex (TREX) restricted stock units vest?

The filing states that the restricted stock unit award will vest on the first anniversary of the grant. This means the 2,831 units are scheduled to become fully vested and settle into shares of common stock one year after July 29, 2026.

How many Trex (TREX) shares does Patricia B. Robinson hold after this award?

After the reported grant, Patricia B. Robinson’s direct holdings total 73,162 shares of Trex common stock. This figure reflects her position following the 2,831-unit restricted stock award reported in the transaction.

Is Patricia B. Robinson’s Trex (TREX) transaction a market purchase or a grant?

The transaction is described as a grant or award acquisition of 2,831 restricted stock units, not a market purchase. It is compensation-related equity that will vest on the first anniversary of the grant date.

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^*

ROBINSON PATRICIA B

(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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	07/29/2026		A⁽¹⁾		2,831	A	$42.39	73,162	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

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)

Source: View Original Filing on SEC EDGAR