Company: OC
Filing Date: 2025-03-14
Form Type: DEF 14A
Source: 0001370946-25-000125
Chunk: 86

Company: Owens Corning
Filing Date: 2025-03-14
Form: DEF 14A
Chunk 86
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 INSTRUCTIONS TO MY BROKER?

If you are the beneficial owner of shares held in “street name” by a broker, the broker (as the record holder of the shares) is required to vote those shares in accordance with your instructions. If you do not provide instructions, your broker will not be able to vote your shares on “non-discretionary” proposals. The only item at the Annual Meeting that is “discretionary” is ratification of the selection of PricewaterhouseCoopers LLP as our independent registered public accounting firm. Accordingly, if you are a beneficial owner, your broker or other holder of record is permitted to vote your shares on the ratification of the selection of PricewaterhouseCoopers LLP as our independent registered public accounting firm even if the stockholder of record does not receive voting instructions from you.

WHAT CAN I DO IF I CHANGE MY MIND AFTER I VOTE MY SHARES?

If you are a stockholder of record, you can revoke your proxy before it is exercised by:

• written notice to the Corporate Secretary of the Company;

• timely delivery of a valid, later-dated proxy or a later-dated vote by telephone or on the internet; or

• voting at the virtual Annual Meeting.

If you are a beneficial owner of shares, you may submit new voting instructions by contacting your broker or other holder of record.

All shares that have been properly voted and not revoked will be voted at the Annual Meeting.

#### WHY ARE YOU HOLDING A VIRTUAL MEETING?
Our Annual Meeting is being held on a virtual-only basis with no physical location. We have decided to hold the Annual Meeting virtually because hosting a virtual Annual Meeting enables greater stockholder attendance and participation from any location around the world, improves meeting efficiency and our ability to communicate effectively with our stockholders, provides for cost savings to the Company and our stockholders, and reduces the environmental impact of our Annual Meeting. Our goal for the Annual Meeting is to enable the broadest number of stockholders to participate in the meeting, while providing similar access to an in-person meeting. We believe that we are observing best practices for virtual stockholder meetings, including by providing technical assistance and addressing as many stockholder questions as time allows.

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T a b l e o f C o n t e n t s

#### HOW CAN I ATTEND THE ANNUAL MEETING?
Our virtual Annual Meeting will be conducted on the internet via webcast. You will be able to participate online by visiting www.virtualshareholdermeeting.com/OC202