Trex (TREX) SVP and CHRO Jacob Rudolph sells 1,400 shares via Rule 10b5-1 plan

Rhea-AI Filing Summary

Trex Company senior vice president and chief human resources officer Jacob T. Rudolph sold shares of company stock under a pre-set trading plan. On June 25, 2026, he completed an open-market sale of 1,400 shares of Trex common stock at $50.00 per share.

The transaction was executed pursuant to a Rule 10b5-1 trading plan he adopted on March 5, 2026, which provides for automatic sales according to pre-established instructions. After this sale, Rudolph directly holds 36,631 shares of Trex common stock.

Insights

Equity compensation and insider-trading analyst

Routine, pre-planned insider sale under a Rule 10b5-1 plan.

The filing shows Trex executive Jacob T. Rudolph executed an open-market sale of 1,400 common shares at $50.00 per share on June 25, 2026. The footnote states the sale followed a Rule 10b5-1 trading plan adopted on March 5, 2026, using automatic, pre-set instructions.

After the transaction, Rudolph directly holds 36,631 shares, so the sale represents a small portion of his disclosed position. Because the trade is both relatively modest and made under a pre-arranged 10b5-1 plan, it is best viewed as a routine liquidity event rather than a strong signal about his outlook on Trex’s shares.

Insider Trade Summary 10b5-1

Net Seller: 1,400 shares ($70,000)

Net Sell 1 txn

Insider Rudolph Jacob T.

Role SVP, CHRO

Sold 1,400 shs ($70K)

Type	Security	Shares	Price	Value
Sale	Common Stock	1,400	$50.00	$70K

Holdings After Transaction: Common Stock — 36,631 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Shares sold: 1,400 shares Sale price: $50.00 per share Shares held after transaction: 36,631 shares +2 more

5 metrics

Shares sold 1,400 shares Open-market sale on June 25, 2026

Sale price $50.00 per share Single trade execution

Shares held after transaction 36,631 shares Direct ownership after sale

Rule 10b5-1 plan adoption date March 5, 2026 Plan governing automatic sales

Transaction code S Sale in open market or private transaction

Key Terms

Rule 10b5-1, 10b5-1 Plan, open-market sale, Common Stock, +1 more

5 terms

Rule 10b5-1 regulatory

"in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

10b5-1 Plan regulatory

"The 10b5-1 Plan provides for automatic sales of shares according to pre-established instructions."

A 10b5-1 plan is a pre-arranged strategy that allows company insiders to buy or sell their shares at predetermined times and prices, even while they are aware of confidential information. It acts like a scheduled appointment for trading, helping ensure transactions happen transparently and legally, which can reassure investors that trades are not based on insider knowledge.

open-market sale financial

"transaction_code_description": "Sale in open market or private transaction""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

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.

Form 4 regulatory

"INSIDER FILING DATA (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.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 06/26/2026 - 02:19 PM Accepted by SEC EDGAR 06/26/2026 - 02:18 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).

X

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^*

Rudolph Jacob T.

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/25/2026

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	06/25/2026		S(1)		1,400	D	$50	36,631	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 reported transaction was effected pursuant to a plan adopted by the reporting person on March 5, 2026, in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934 (the "10b5-1 Plan"). The 10b5-1 Plan provides for automatic sales of shares according to pre-established instructions. The reporting person sold 1,400 shares in a single trade at a price of $50.00 per share. All 1,400 shares under the 10b5-1 Plan have been sold.

	/s/ Amy M. Fernandez by power of attorney	06/26/2026
	** 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 did Trex (TREX) executive Jacob T. Rudolph report in this Form 4?

Jacob T. Rudolph reported selling 1,400 shares of Trex common stock. The shares were sold in an open-market transaction at $50.00 per share, and the trade was executed under a pre-established Rule 10b5-1 trading plan.

At what price were the Trex (TREX) shares sold in Rudolph’s transaction?

The reported 1,400 Trex shares were sold at $50.00 per share. This price is disclosed as a single trade execution, meaning all shares in the transaction cleared at the same stated per-share price.

How many Trex (TREX) shares does Jacob T. Rudolph hold after this sale?

Following the reported sale, Jacob T. Rudolph directly holds 36,631 shares of Trex common stock. This post-transaction holding is disclosed in the Form 4 as his direct ownership position after the 1,400-share sale.

Was Jacob T. Rudolph’s Trex (TREX) stock sale under a Rule 10b5-1 plan?

Yes. The footnote explains the sale was executed under a Rule 10b5-1 trading plan adopted on March 5, 2026. Such plans pre-schedule trades using automatic instructions, reducing the significance of short-term market timing.

What role does Jacob T. Rudolph hold at Trex (TREX)?

Jacob T. Rudolph is identified as a senior vice president and chief human resources officer at Trex. This officer title is disclosed in the Form 4, indicating he is a company executive subject to insider reporting requirements.

How large was Rudolph’s Trex (TREX) share sale relative to his holdings?

Rudolph sold 1,400 shares and held 36,631 shares afterward. This indicates he disposed of only a small fraction of his disclosed direct position, consistent with a routine, limited liquidity transaction.