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International Business Machines (IBM) Faces Probe Over Z Mainframe Disclosure Risks

International Business Machines (IBM) Faces Probe Over Z Mainframe Disclosure Risks

By Bailey Pemberton
Publication Date: 2026-09-25 21:08:00

  • Hagens Berman Sobol Shapiro LLP has launched a material investigation into International Business Machines (NYSE:IBM) over disclosures tied to its Z mainframe segment.

  • The probe centers on whether IBM adequately informed investors about risks connected to a significant revenue shortfall in its Z mainframe business.

  • Investigators are assessing potential violations of federal securities laws and IBM’s compliance with SEC reporting requirements related to this shortfall.

  • The new Hagens Berman investigation into IBM’s Z mainframe revenue shortfall and disclosure practices deserves weighing against the rest of our findings. We have also spotted 4 other big wins worth knowing about at International Business Machines.

For readers tracking how AI and cloud demand reshape the hardware and data plumbing behind it, this IBM development sits within a much larger infrastructure buildout that is drawing attention to 87 AI infrastructure stocks.