Rimini Street Appoints Keith Costello as Executive VP & COO

What Happened Rimini Street, Inc. announced in an 8-K that the Board appointed Keith C. Costello, age 60, as Executive Vice President and Chief Operating Officer, effective August 17, 2026. Mr. Costello will serve as the company’s principal operating officer. He joins Rimini Street from DXC Technology, where he held senior global application and services roles through August 2026, and previously held senior leadership positions at IBM, SAP, Oracle and others; he also worked at Rimini Street in 2016 as Senior VP, Global Client Engagement.

Key Details

• Start date: August 17, 2026; Offer Letter dated August 5, 2026.
• Base salary: $460,000 per year; target annual cash bonus: 81.74% of salary (prorated for 2026).
• Long-term incentives: Eligible for the executive LTI Plan beginning 2027; target LTI value will equal 50% of the CEO’s LTI target.
• Onboarding equity (grant date Aug 17, 2026): stock options for 150,000 shares and RSUs for 150,000 shares; both vest in three equal annual installments; option exercise price = fair market value on grant date (Nasdaq close).
• Severance: If terminated without Cause or resigns for Good Reason before a Change of Control, Mr. Costello receives 12 months’ base pay, 12 months’ target bonus, and 12 months of COBRA premiums; special provisions apply for terminations within 24 months after a Change of Control, including 100% vesting of unvested equity.

Why It Matters This is a material executive change: appointing an experienced technology and services leader as COO may affect Rimini Street’s operations and go-to-market execution. Key compensation and equity grants are sizeable and include standard severance and change‑of‑control protections, which are relevant for investors tracking executive incentives and potential dilution from equity awards. The filing provides concrete terms investors can use to assess cost, retention incentives, and alignment with management.