Trex (TREX) CFO receives time- and performance-based stock unit grants

Rhea-AI Filing Summary

Gandhi Prithvi reported acquisition or exercise transactions in this Form 4 filing.

Trex Company’s Senior Vice President and Chief Financial Officer, Prithvi Gandhi, reported equity awards in the form of restricted stock units tied to Trex common stock. The awards cover 13,848, 13,848 and 18,094 shares at a reference price of $41.45 per share.

One award vests in three equal annual installments on March 1, 2027, 2028 and 2029. A second, performance-based award uses the same schedule, with actual vesting each year ranging from 0% to 200% of the 13,848-share target based on Company financial goals.

A third restricted stock unit award linked to 18,094 shares will vest under the terms of a Retention Agreement dated February 24, 2026 between Trex Company, Inc. and Prithvi S. Gandhi, as further described in Trex’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025. Following the latest transaction line, Gandhi directly holds 76,454 shares.

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

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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^*

Gandhi Prithvi

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Chief Financial Officer

3. Date of Earliest Transaction (Month/Day/Year)
02/24/2026

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	02/24/2026		A(1)		13,848	A	$41.45	44,512	D
Common Stock	02/24/2026		A(2)		13,848	A	$41.45	58,360	D
Common Stock	02/24/2026		A(3)		18,094	A	$41.45	76,454	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 vests over a three-year period in three equal annual installments occurring March 1, 2027, March 1, 2028, and March 1, 2029.

2. This restricted stock unit award is performance-based, and vests over a three-year period in three equal installments occurring March 1, 2027, March 1, 2028, and March 1, 2029. The number of shares set forth above is the target number of shares. The number of shares that will actually vest each year will be based upon performance against certain financial goals for the Company and will range from 0% to 200% of the target number of shares.

3. This restricted stock unit award will vest in accordance with the terms of a Retention Agreement, dated February 24, 2026, between Trex Company, Inc. and Prithvi S. Gandhi; as further described in the Company's Annual Report on Form 10-K for the fiscal year ended December 31, 2025.

	/s/ Amy M. Fernandez by power of attorney	02/25/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What does Trex (TREX) CFO Prithvi Gandhi’s latest Form 4 report?

The Form 4 reports equity awards to Trex CFO Prithvi Gandhi in the form of restricted stock units tied to Trex common stock. These awards are grants, not open‑market purchases, and include both time‑based and performance‑based vesting over multiple years.

How many Trex shares are covered by the CFO’s new equity awards?

The filing shows three restricted stock unit awards linked to 13,848, 13,848 and 18,094 Trex common shares at a reference price of $41.45 per share. These represent target share amounts for the awards disclosed in the Form 4.

What are the vesting terms for the time-based Trex CFO restricted stock units?

One restricted stock unit award to the Trex CFO vests over three years in three equal annual installments. Vesting dates are March 1, 2027, March 1, 2028 and March 1, 2029, subject to the award’s standard conditions and continued service requirements described in the filing.

How do the performance-based Trex (TREX) restricted stock units work for the CFO?

The performance-based restricted stock unit award has a 13,848-share target and vests in three equal installments on March 1, 2027, 2028 and 2029. Actual shares vesting each year depend on Trex’s financial goals, ranging from 0% to 200% of the target number of shares.

What is the Retention Agreement mentioned in Trex CFO Prithvi Gandhi’s Form 4?

One restricted stock unit award will vest under a Retention Agreement dated February 24, 2026 between Trex Company, Inc. and Prithvi S. Gandhi. The agreement’s vesting terms are further described in Trex’s Annual Report on Form 10-K for the year ended December 31, 2025.

Does Trex CFO Prithvi Gandhi’s Form 4 show stock buying or selling in the market?

The Form 4 reports grant or award acquisitions coded as “A,” rather than open‑market buys or sales. These transactions represent restricted stock unit awards granted to the CFO, not discretionary purchases or disposals of Trex common stock on an exchange.

How many Trex shares does the CFO hold after the reported Form 4 transactions?

After the last reported equity award line, the Form 4 lists Prithvi Gandhi as directly owning 76,454 Trex common shares. This figure reflects direct ownership following the grant entries disclosed for the restricted stock unit awards on the reported transaction date.