IBM

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-08-27 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: INTERNATIONAL BUSINESS MACHINES CORP (IBM) CIK: 0000051143 --- Reporting Owner --- Name: KRISHNA ARVIND CIK: 0001629898 Role: Director, Officer (Chairman, President & CEO) --- Derivative Transactions --- [Transaction #1] Security: Phantom Stock Date: 2026-08-27 | Code: I (Discretionary (intra-plan)) Shares: +8,375.5601 | Price: $238.79 Exercise Price: $0.00 Shares Owned After: 28,447.467 | Ownership: D (Direct) Footnotes: [F1] Phantom stock units convert to the cash value of the company's common stock on a one-for-one basis. [F2] Acquisition of phantom stock units under the IBM Excess Savings Plan. [F3] Distribution of phantom stock units under the IBM Excess Savings Plan is deferred until separation from the company. The reporting person may transfer these phantom stock units into an alternative investment account under such plan. [F3] Distribution of phantom stock units under the IBM Excess Savings Plan is deferred until separation from the company. The reporting person may transfer these phantom stock units into an alternative investment account under such plan. --- Footnotes (Complete Index) --- F1: Phantom stock units convert to the cash value of the company's common stock on a one-for-one basis. F2: Acquisition of phantom stock units under the IBM Excess Savings Plan. F3: Distribution of phantom stock units under the IBM Excess Savings Plan is deferred until separation from the company. The reporting person may transfer these phantom stock units into an alternative investment account under such plan. --- Signature --- /s/ L. Mallardi on behalf of A. Krishna (2026-08-28)