Sec Form 4 Filing - Musser Eric S @ CORNING INC /NY - 2024-04-15

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Musser Eric S 2. Issuer Name and Ticker or Trading Symbol CORNING INC /NY [ GLW] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and COO (Last) (First) (Middle) ONE RIVERFRONT PLAZA 3. Date of Earliest Transaction (MM/DD/YY) 04/15/2024 (Street) CORNING, NY14831 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/15/2024 M 26,703 A $ 0 213,592 D Common Stock 04/15/2024 M 38,562 A $ 0 252,154 D Common Stock 04/15/2024 F 31,785 D $ 31.29 220,369 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Performance Share Unit ( 1 ) ( 2 ) ( 2 ) Common Stock 12,588 12,588 D Restricted Stock Unit ( 3 ) ( 4 ) ( 4 ) Common Stock 2,116 2,116 D Performance Share Unit ( 1 ) ( 5 ) ( 5 ) Common Stock 17,860 17,860 D Performance Share Unit ( 1 ) ( 6 ) ( 6 ) Common Stock 9,910 9,910 D Restricted Stock Unit ( 3 ) ( 7 ) ( 7 ) Common Stock 37,518 37,518 D Restricted Stock Unit ( 3 ) ( 8 ) ( 8 ) Common Stock 43,618 43,618 D Restricted Stock Unit ( 3 ) ( 9 ) ( 9 ) Common Stock 38,983 38,983 D Restricted Stock Unit ( 3 ) 04/15/2024 M 26,703 ( 10 ) ( 10 ) Common Stock 26,703 $ 0 0 D Performance Share Unit ( 1 ) 04/15/2024 M 38,562 ( 11 ) ( 11 ) Common Stock 38,562 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Musser Eric S ONE RIVERFRONT PLAZA CORNING, NY14831 President and COO Signatures Linda E. Jolly, Power of Attorney 04/17/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Each performance share unit represents a contingent right to receive one share of Corning Incorporated common stock. ( 2 )Performance share units (PSUs) were earned February 7, 2024 per Compensation Committee decision that performance criteria were satisfied for fiscal year 2023 pursuant to the 2023 agreement. Earned PSUs remain restricted until vesting. The earned units will vest 1/3 after 1 year from the February 8, 2023 grant date and 1/6 every 6 months thereafter until fully vested on the third anniversary of the grant date. ( 3 )Each restricted stock unit represents a contingent right to receive one share of Corning Incorporated common stock. ( 4 )The restricted stock units (RSUs) granted on February 8, 2023 will vest 2/3 after 1 year and 1/3 after 18 months from the grant date. ( 5 )Earned PSUs remain restricted until April 15, 2025, when they vest and convert to common stock, subject to service-based vesting requirement. ( 6 )Earned PSUs remain restricted until April 15, 2026, when they vest and convert to common stock, subject to service-based vesting requirement. ( 7 )The restricted stock units (RSUs) vest 100% on April 15, 2025. Events such as retirement, death, disability, and others specified in the agreement may result in vesting prior to the vesting date. ( 8 )The restricted stock units (RSUs) vest 100% on April 15, 2027. Events such as retirement, death, disability, and others specified in the agreement may result in vesting prior to the vesting date. ( 9 )The restricted stock units (RSUs) vest 100% on April 15, 2026. Events such as retirement, death, disability, and others specified in the agreement may result in vesting prior to the vesting date. ( 10 )The restricted stock units (RSUs) vested 100% on April 15, 2024. ( 11 )The performance share units (PSUs) vested 100% on April 15, 2024.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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