OC

• Diluted EPS from continuing operations was $3.84; adjusted diluted EPS was $3.93.
• Adjusted EBITDA margin from continuing operations was 24%, with net earnings margin of 11%.
• Operating cash flow was $398 million and free cash flow was $199 million; $264 million returned to shareholders.
• Company expects Q3 2026 revenue of approximately $2.6-$2.7 billion and adjusted EBITDA margin of 20%-22%.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Collins' annual base salary will be $775,000, with a target annual cash incentive of 100% of base salary and a 2027 long-term incentive target award of $2.75 million.
• Collins will receive an initial equity award including $1.5 million in performance share units, $1 million in RSUs cliff vesting after 30 months, and $2 million in RSUs vesting over 18 months, plus a $500,000 sign-on bonus.
• Todd W. Fister, current EVP and Chief Financial and Operating Officer, will become President and Chief Operating Officer, with Roofing, Doors, and Insulation business Presidents reporting to him.
• Retention awards of $1 million each in RSUs were approved for Nicolas Del Monaco (President, Roofing) and Rachel Marcon (President, Doors), vesting after three years.
• Brian D. Chambers will continue as Chief Executive Officer, with Fister assuming the President role from him.

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements

• Net earnings from continuing operations attributable to Owens Corning were $38 million, down 85% from $255 million.
• Adjusted EBITDA from continuing operations was $369 million, down 35% from $565 million; adjusted diluted EPS was $1.22, down 59%.
• Completed sale of glass reinforcements business on April 30, 2026, with cash proceeds of approximately $280 million.
• Guides Q2 2026 revenue of $2.6-$2.7 billion and adjusted EBITDA margin of 20%-22%.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits

• Owens Corning closed the sale of substantially all of its global glass reinforcements business on April 30, 2026.
• The enterprise value was revised from $755 million to $645 million in an April 14, 2026 amendment to the agreement.
• The company expects net after-tax cash proceeds of approximately $280 million after customary and transaction-specific adjustments.
• Proceeds will be used for organic growth initiatives and returning cash to shareholders per the capital allocation strategy.

8.01 Other Events

• Todd W. Fister, 51, was promoted to Executive Vice President, Chief Financial and Operating Officer, effective May 1, 2026.
• His base salary will be $850,000 per year, with target annual cash incentive remaining at 100% of base salary.
• His annual long-term incentive award target increases to $3,500,000 starting in 2027.
• He will receive a promotional equity award of $1,000,000 in restricted stock units, vesting generally after two years.

5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements

• Stockholders ratified PricewaterhouseCoopers LLP as the independent registered public accounting firm for 2026, with 66,874,167 votes for, 4,059,205 against, and 60,256 abstentions.
• On an advisory basis, stockholders approved 2025 named executive officer compensation, with 59,702,618 votes for, 5,781,137 against, and 338,378 abstentions.
• Broker non-votes of 5,171,495 were recorded for each director election and the advisory compensation vote.
• The report was filed under Item 5.07 to disclose the voting results of the three proposals from the annual meeting.

5.07 Submission of Matters to a Vote of Security Holders

• The amendment includes a $30 million non-refundable deposit from the purchasers and transfer of approximately $65 million of additional assets at close.
• The company expects after-tax net proceeds of approximately $280 million and anticipates closing the transaction in the second quarter of 2026.
• Owens Corning will recognize an additional loss on sale of approximately $140 million due to the revised purchase price and changes in other net assets.
• The GR Business has been classified as held for sale and reported as discontinued operations since the first quarter of 2025.

2.06 Material Impairments · 8.01 Other Events

• Reported net loss attributable to Owens Corning was $188 million for 2025, including $1.2 billion in non-cash impairment charges related to the Doors business.
• Adjusted EBITDA from continuing operations was $2.268 billion for 2025, with an adjusted EBITDA margin of 22%.
• Operating cash flow was $1.8 billion and free cash flow was $1.0 billion for 2025.
• The company returned $1.0 billion to shareholders in 2025 and expects Q1 2026 revenue of approximately $2.1–2.2 billion.

2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits