Trex executive sells 1,050 shares at $50.07 average

TREX CO INC executive Amy M. Fernandez, SVP, CLO and Secretary, reported a sale of 1,050 shares of common stock on 2026-08-07.

Rhea-AI Filing Summary

TREX CO INC executive Amy M. Fernandez, SVP, CLO and Secretary, reported a sale of 1,050 shares of common stock on 2026-08-07. The shares were sold at a weighted average price of $50.0689 per share, with trade prices ranging from $49.97 to $50.11. Following the transaction, she directly holds 67,794 shares of Trex common stock.

Insider Trade Summary

Net Seller: 1,050 shares

Net Sell 1 txn

Insider Fernandez Amy M.

Role SVP, CLO and Secretary

Sold 1,050 shs ($53K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	1,050	$50.0689	$53K

Holdings After Transaction: Common Stock — 67,794 shares (Direct)

Footnotes (1)

1. F1. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $49.97 to $50.11, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

Key Figures

Shares sold: 1,050 shares Weighted average sale price: $50.0689 per share Post-transaction holdings: 67,794 shares +1 more

4 metrics

Shares sold 1,050 shares Common stock sale by Amy M. Fernandez on 2026-08-07

Weighted average sale price $50.0689 per share Sale of 1,050 shares of Trex common stock

Post-transaction holdings 67,794 shares Direct ownership after reported sale on 2026-08-07

Price range of individual trades $49.97–$50.11 per share Range for multiple sale transactions included in weighted average

Key Terms

weighted average price, Form 4, common stock

3 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

Form 4 regulatory

"within the ranges set forth in footnote (1) to this 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.

common stock financial

"These shares were sold in multiple transactions in Trex 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.

FAQ

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

What insider transaction did TREX (TREX) report for Amy M. Fernandez?

Amy M. Fernandez reported a sale of 1,050 shares of TREX common stock on 2026-08-07. She remains a significant holder with 67,794 shares directly owned after the transaction.

At what price were Amy M. Fernandez’s TREX (TREX) shares sold?

The reported sale used a weighted average price of $50.0689 per share. Individual trades occurred in multiple transactions at prices ranging from $49.97 to $50.11, according to the filing footnote.

How many TREX (TREX) shares does Amy M. Fernandez hold after this Form 4 transaction?

After selling 1,050 shares, Amy M. Fernandez directly holds 67,794 shares of TREX common stock. This figure reflects her reported position immediately following the 2026-08-07 sale.

What role does Amy M. Fernandez hold at TREX (TREX)?

Amy M. Fernandez serves as Senior Vice President, Chief Legal Officer and Secretary at TREX CO INC. Her Form 4 filing reflects transactions in the company’s common stock in her capacity as a reporting officer.

Was the TREX (TREX) insider sale by Amy M. Fernandez under a Rule 10b5-1 plan?

The filing indicates the Rule 10b5-1 checkbox is not affirmed for this transaction. The footnote instead focuses on explaining that the reported sale price is a weighted average of multiple trades.

What does the weighted average price mean in the TREX (TREX) Form 4 footnote?

The footnote explains that the $50.0689 figure is a weighted average of multiple trades. Individual shares were sold in separate transactions at prices between $49.97 and $50.11, and detailed price breakdowns are available upon request.

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

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Available on EDGAR 08/11/2026 - 04:25 PM Accepted by SEC EDGAR 08/11/2026 - 04:25 PM 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^*

Fernandez Amy M.

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, CLO and Secretary

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/07/2026

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	08/07/2026		S		1,050	D	$50.0689(1)	67,794	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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $49.97 to $50.11, inclusive. The reporting person undertakes to provide to Issuer, any security holder of Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

	/s/ Amy M. Fernandez	08/11/2026
	** 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)