CORNING INC /NY

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities

Exchange Act of 1934 (Amendment No.)

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CORNING INCORPORATED

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2026 Notice of Annual Meeting of Shareholders & Proxy Statement

Our Values

Corning’s Values provide an unchanging moral and ethical

compass that guides the actions of everyone in the company.

Quality

Integrity

Performance

Leadership

Innovation

Independence

The Individual

A Letter from Our Chairman and CEO

Dear Fellow Shareholder,

This year we mark Corning’s 175th birthday. Not only are we among the oldest companies currently listed on the S&P 500, but we just closed out 2025 with all-time record core sales and core EPS and have an incredibly exciting growth outlook.

The basis of our success begins with Springboard. Two years ago, we outlined our plan to capture strong sales growth, as our innovative products and deep customer relationships positioned us to capitalize on important secular trends.

Since we had the capacity in place to support the growth, we also expected deliver a significantly enhanced return profile, with profits growing faster than sales. We set a core operating margin target of 20% by the end of 2026 to track our progress and said we also expected significant improvements in core EPS, core ROIC, and adjusted free cash flow.

Two years into the plan, Springboard has been a tremendous success. Overall, we have fundamentally transformed the company’s financial profile. We believe we now have a highly profitable launch point for future growth, and we enter 2026 on an exciting journey to extend our success in the coming years. What an exciting way to mark Corning's 175 th anniversary, a feat so few companies ever attain.

Going forward, we plan to maintain our long-term approach to value creation. Through an unwavering commitment to life-changing innovation, we provide durable, profitable growth and long-term value for our shareholders by inventing category-defining products, developing scalable manufacturing platforms, and building strong, trust-based relationships with our people and communities and our customers who are leaders in their industries. And all of our actions are grounded in a distinct set of Values, which guide everything we do.

I thank you, our shareholders, for being on this journey with us. We work hard every day to earn your trust and reward your confidence in us.

I hope you are as excited as I am about Corning’s next 175 years of life-changing innovation. We look forward to sharing more details at our Annual Meeting.

Sincerely, Wendell P. Weeks Chairman of the Board, Chief Executive Officer and President

This is a company that is built to last…a company that continually produces innovations that enhance people’s lives and transform industries… a company that rewards its shareholders with stability, a reliable dividend, and the opportunity for growth from successful new products. But most importantly, this is a company that always lives its values and makes a real difference in the world.

—Wendell P. Weeks, Chairman, Chief Executive Officer and President

Thursday, April 30, 2026

12 noon Eastern Time

How to Attend Our Annual Meeting: Our 2026 Annual Meeting will be held in a virtual-only format. You will not be able to attend the Annual Meeting physically. You are entitled to participate in the Annual Meeting if you were a shareholder as of the close of business on March 2, 2026. The live audio webcast of the meeting will begin promptly at 12 noon Eastern Time. Online access to the meeting will open 30 minutes prior to its start. We encourage you to access the meeting in advance of the designated start time. To attend and vote your shares during the Annual Meeting, you will need to log in to virtualshareholdermeeting. com/GLW2026 using, (i) for record holders, the control number found on your proxy card or the notice you previously received, or (ii) for holders who own shares in street name through brokers, the control number issued to you by your brokerage firm. You may vote during the Annual Meeting by following the instructions available on the website during the meeting. If you do not have a control number, you may log in as a guest, although you will not be able to vote during the meeting. We urge you to vote and submit your proxy in advance of the meeting using one of the methods described in the proxy materials whether or not you plan to attend the Annual Meeting. You may vote your shares in advance at ProxyVote.com.

ITEMS OF BUSINESS

WHO CAN VOTE

You may vote at our 2026 Annual Meeting if you were a shareholder of record at the close of business on March 2, 2026.

Your vote is important to us. Please exercise your right to vote.

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting to be held on April 30, 2026: our proxy statement, our Annual Report on Form 10-K for the year ended December 31, 2025 and other materials are available on our website atcorning.com/2026-proxy.

Sincerely,

**Melissa J. Gambol

**Vice President and Corporate Secretary

March 20, 2026

VOTE RIGHT AWAY

Your vote is very important. Please promptly submit your proxy or voting instructions by Internet, telephone or mail to ensure the presence of a quorum. You may also vote during our Annual Meeting (subject to the circumstances described in the box at left). If you are a shareholder of record, you may vote during the meeting using the control number on the proxy card or the notice previously provided to you. If your shares are held in the name of a broker, nominee or other intermediary, such party can provide the control number to you. Shareholders without a control number may still attend the meeting as guests.