Company: LPX
Filing Date: 2025-12-12
Form Type: 10-Q/A
Source: 0000060519-25-000039
Chunk: 0

Company: LOUISIANA-PACIFIC CORP
Filing Date: 2025-12-12
Form: 10-Q/A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### FORM 10-Q/A
<div align='center'>(Amendment No. 1)</div>

<div align='center'>x QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934</div>

#### For the Quarterly Period Ended September 30, 2025
<div align='center'>o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934</div>

#### Commission File Number

#### 1-7107

### LOUISIANA-PACIFIC CORPORATION
<div align='center'>(Exact name of registrant as specified in its charter)</div>

| Delaware                        |     | 93-0609074         |
| (State or other jurisdiction of 
 incorporation or organization)  |     | -IRS Employer      
 Identification No. |

<div align='center'>1610 West End Avenue, Suite 200, Nashville, TN 37203

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code: (615) 986 - 5600</div>

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

| Title of each class        |     | Trading Symbol |     | Name of each exchange on which registered |
| Common Stock, $1 par value |     | LPX            |     | New York Stock Exchange                   |

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes x No o

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes x No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company,