Company: OC
Filing Date: 2025-04-03
Form Type: POSASR
Source: 0001370946-25-000135
Chunk: 2

Company: Owens Corning
Filing Date: 2025-04-03
Form: POSASR
Chunk 2
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 undertaking made by the Company in Part II of the 2023 Registration Statement to remove from registration, by means of a post-effective amendment, any securities that had been registered for issuance that remain unsold at the termination of the offering, the Company hereby removes and withdraws from registration all such securities of the Company registered under the 2023 Registration Statement that remain unsold as of the date of this Post-Effective Amendment No. 1.

### SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Post-Effective Amendment No. 1 to the 2023 Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Toledo, State of Ohio, on April 3, 2025. No other person is required to sign this Post-Effective Amendment No. 1 to the 2023 Registration Statement in reliance on Rule 478 of the Securities Act of 1933, as amended.

| OWENS CORNING |     |                              |
| By:           |     | /s/ Todd W. Fister           |
|               |     | Todd W. Fister               |
|               |     | Executive Vice President and |
|               |     | Chief Financial Officer      |