CORNING INC /NY — Director's Dealing 2025

Oct 2, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CORNING INC /NY (GLW)
CIK: 0000024741
Period of Report: 2025-09-30

Reporting Person: Musser Eric S (Retired President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-30	Common Stock	M	525	—	Acquired	145195	Direct
2025-09-30	Common Stock	F	269	$82.03	Disposed	144926	Direct
2025-09-30	Common Stock	M	1132	—	Acquired	146058	Direct
2025-09-30	Common Stock	F	1132	$82.03	Disposed	144926	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-09-30	Performance Share Unit	$	M	525	Disposed		Common Stock (525)	Direct
2025-09-30	Restricted Stock Unit	$	M	1132	Disposed		Common Stock (1132)	Direct

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Performance Share Unit	$		Common Stock (45305)	45305	Direct
Performance Share Unit	$		Common Stock (37864)	37864	Direct
Restricted Stock Unit	$		Common Stock (41835)	41835	Direct
Restricted Stock Unit	$		Common Stock (38983)	38983	Direct

Footnotes

F1: Each performance share unit represents a contingent right to receive one share of Corning Incorporated common stock.

F2: Earned PSUs remain restricted until April 15, 2026, when they vest and convert to common stock, subject to service-based vesting requirement.

F3: Earned PSUs remain restricted until April 15, 2027, when they vest and convert to common stock, subject to service-based vesting requirement.

F4: Each restricted stock unit represents a contingent right to receive one share of Corning Incorporated common stock.

F5: 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.

F6: 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.

F7: Performance Share Units (PSU) vested on 9/30/25 pursuant to the 2/8/23 agreement.

F8: The balance represents the forfeiture of 2,622 PSUs at retirement.

F9: The restricted stock units (RSUs) vest 100% on April 14, 2028. Events such as retirement, death, disability, and others specified in the agreement may result in vesting prior to the vesting date.

F10: The balance represents the forfeiture of 8,234 RSUs at retirement.