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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

## FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 08, 2025

Trex Company Inc

(Exact name of Registrant as Specified in Its Charter)

Delaware | 001-14649 | 54-1910453
(State or Other Jurisdiction of Incorporation) | (Commission File Number) | (IRS Employer Identification No.)
2500 Trex Way |
Winchester, Virginia |  | 22601
(Address of Principal Executive Offices) |  | (Zip Code)

Registrant’s Telephone Number, Including Area Code: 540 542-6300

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock |  | TREX |  | New York Stock Exchange LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

## Item 2.02 Results of Operations and Financial Condition.

On May 8, 2025, Trex Company, Inc. issued a press release announcing financial results for the three months ended March 31, 2025. A copy of such press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

## Item 9.01 Financial Statements and Exhibits.

(d) Trex Company, Inc. herewith furnishes the following exhibits:

Exhibit Number |  | Description of Exhibit
99.1 |  | Press release dated May 8, 2025, announcing financial results for the three months ended March 31, 2025.
104.1 |  | Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: | May 8, 2025 |  | /s/ Brenda K. Lovcik
|  |  | Brenda K. Lovcik
|  |  | Senior Vice President and
|  |  | Chief Financial Officer