Keith Conan Costello - 17 Aug 2026 Form 4 Insider Report for Rimini Street, Inc. (RMNI)

Reporting relationship: EVP & Chief Operating Officer
Issuer ticker: RMNI
Reported as of: 17 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Aug 2026, 16:54:01 UTC
Source filing: View source filing
Reporting owner signature: /s/ Celeste Rasmussen Peiffer, as Attorney-in-Fact

Key filing fact

Keith Conan Costello filed Form 4 for Rimini Street, Inc. (RMNI) on 17 Aug 2026.

Key facts

This page summarizes Keith Conan Costello's Form 4 filing for Rimini Street, Inc. (RMNI).
2 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 17 Aug 2026, 16:54.

Change

No earlier filing in this sequence is available for direct comparison.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0002149694 Primary reporting owner

Costello Keith Conan

Relationship: EVP & Chief Operating Officer
Address: C/O 1700 S. PAVILION CENTER DRIVE, SUITE 330, LAS VEGAS
Signature: /s/ Celeste Rasmussen Peiffer, as Attorney-in-Fact
Signature date: 17 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

RMNI holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 0
Date: 17 Aug 2026
Ownership: Direct

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

RMNI transaction Derivative

Employee Stock Options (Right to Buy)

Award

Transaction value
Shares: +150,000
Change %
Price: $0.000000^*
Shares after: 150,000
Date: 17 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 150,000
Exercise price: $4.96
Footnotes: F1

RMNI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +150,000
Change %
Price: $0.000000^*
Shares after: 150,000
Date: 17 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 150,000
Exercise price
Footnotes: F2, F3

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 3 footnotes

Footnote F1

The Stock Options are subject to time-based vesting conditions and will vest in three (3) equal annual installments on August 17, 2027, August 17, 2028 and August 17, 2029, generally subject to the Reporting Person continuing to be a Service Provider (as such term is defined in the Issuer's 2013 Equity Incentive Plan) through the applicable vesting date.

Footnote F2

Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's Common Stock upon vesting.

Footnote F3

The Restricted Stock Units are subject to time-based vesting conditions and will vest in three (3) equal annual installments on August 17, 2027, August 17, 2028 and August 17, 2029, generally subject to the Reporting Person continuing to be a Service Provider (as such term is defined in the Issuer's 2013 Equity Incentive Plan) through the applicable vesting date.