Rimini Street grants COO 300,000 equity awards

Q: What equity awards did RMNI grant to Keith Conan Costello on August 17, 2026?

Rimini Street, Inc. granted Keith Conan Costello 150,000 stock options at an exercise price of $4.96 and 150,000 Restricted Stock Units, each RSU convertible into one share of common stock, as part of his compensation package.

Q: What is the vesting schedule for Keith Conan Costello’s RMNI stock options?

The 150,000 stock options vest in three equal annual installments on August 17, 2027, 2028, and 2029, generally conditioned on Costello continuing to be a Service Provider under Rimini Street’s 2013 Equity Incentive Plan.

Q: How do the RMNI Restricted Stock Units granted to Keith Conan Costello vest?

The 150,000 Restricted Stock Units vest in three equal annual installments on August 17, 2027, 2028, and 2029, generally subject to Costello’s continued service. Each vested RSU represents a right to receive one share of Rimini Street common stock.

Q: What does the $4.96 exercise price mean for Keith Conan Costello’s RMNI stock options?

The $4.96 exercise price is the amount per share Costello must pay to acquire each share of common stock under the 150,000 stock options, if and when those options become vested and he chooses to exercise them.

Q: How many RMNI common shares does Keith Conan Costello report holding after these grants?

After these awards, Costello reports holding 0 shares of Rimini Street common stock directly, but holds 150,000 stock options and 150,000 Restricted Stock Units, which are derivative interests tied to the company’s common stock.

Q: Are Keith Conan Costello’s new RMNI equity awards immediately exercisable or settled?

No, both the 150,000 stock options and 150,000 RSUs are subject to time-based vesting, with vesting in three equal tranches on August 17, 2027, 2028, and 2029, conditioned on continued service through each vesting date.

Rimini Street, Inc. granted EVP & Chief Operating Officer Keith Conan Costello 150,000 Employee Stock Options with an exercise price of $4.96 per share and 150,000 Restricted Stock Units, each RSU representing one share of common stock.

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Rhea-AI Filing Summary

Rimini Street, Inc. granted EVP & Chief Operating Officer Keith Conan Costello 150,000 Employee Stock Options with an exercise price of $4.96 per share and 150,000 Restricted Stock Units, each RSU representing one share of common stock. Both awards are subject to time-based vesting in three equal annual installments on August 17, 2027, 2028, and 2029, generally contingent on his continued service. Following these awards, Costello reports 150,000 options and 150,000 RSUs held directly and 0 shares of common stock held directly.

Insider Trade Summary

Grant/Award: 300,000 shares

Grant/Award 3 txns

Insider Costello Keith Conan

Role EVP & Chief Operating Officer

Type	Security	Shares	Price	Value
Grant/Award	Employee Stock Options (Right to Buy) ^F1	150,000	$0.00	$0.00
Grant/Award	Restricted Stock Units ^{F2, F3}	150,000	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Employee Stock Options (Right to Buy) — 150,000 contracts (Direct); Restricted Stock Units — 150,000 contracts (Direct); Common Stock — 0 shares (Direct)

Footnotes (3)

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.
F2. Each Restricted Stock Unit represents a contingent right to receive one share of the Issuer's Common Stock upon vesting.
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.

Key Figures

Stock options granted: 150,000 shares Option exercise price: $4.96 per share RSUs granted: 150,000 units +3 more

6 metrics

Stock options granted 150,000 shares Employee Stock Options (Right to Buy) granted on 2026-08-17

Option exercise price $4.96 per share Conversion or exercise price for 150,000 Employee Stock Options

RSUs granted 150,000 units Restricted Stock Units granted on 2026-08-17

RSU underlying shares 150,000 shares Each RSU represents one share of common stock

Option expiration date 2036-08-17 Expiration date of Employee Stock Options granted

Common stock held after transaction 0 shares Directly held Rimini Street common stock after reported transactions

Key Terms

Employee Stock Options (Right to Buy), Restricted Stock Units, time-based vesting conditions, Service Provider, +1 more

5 terms

Employee Stock Options (Right to Buy) financial

"security_title "Employee Stock Options (Right to Buy)""

Restricted Stock Units financial

"security_title "Restricted Stock Units""

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

time-based vesting conditions financial

"The Stock Options are subject to time-based vesting conditions"

Service Provider financial

"subject to the Reporting Person continuing to be a Service Provider"

2013 Equity Incentive Plan financial

"as such term is defined in the Issuer's 2013 Equity Incentive Plan"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity awards did RMNI grant to Keith Conan Costello on August 17, 2026?

Rimini Street, Inc. granted Keith Conan Costello 150,000 stock options at an exercise price of $4.96 and 150,000 Restricted Stock Units, each RSU convertible into one share of common stock, as part of his compensation package.

What is the vesting schedule for Keith Conan Costello’s RMNI stock options?

The 150,000 stock options vest in three equal annual installments on August 17, 2027, 2028, and 2029, generally conditioned on Costello continuing to be a Service Provider under Rimini Street’s 2013 Equity Incentive Plan.

How do the RMNI Restricted Stock Units granted to Keith Conan Costello vest?

The 150,000 Restricted Stock Units vest in three equal annual installments on August 17, 2027, 2028, and 2029, generally subject to Costello’s continued service. Each vested RSU represents a right to receive one share of Rimini Street common stock.

What does the $4.96 exercise price mean for Keith Conan Costello’s RMNI stock options?

The $4.96 exercise price is the amount per share Costello must pay to acquire each share of common stock under the 150,000 stock options, if and when those options become vested and he chooses to exercise them.

How many RMNI common shares does Keith Conan Costello report holding after these grants?

After these awards, Costello reports holding 0 shares of Rimini Street common stock directly, but holds 150,000 stock options and 150,000 Restricted Stock Units, which are derivative interests tied to the company’s common stock.

Are Keith Conan Costello’s new RMNI equity awards immediately exercisable or settled?

No, both the 150,000 stock options and 150,000 RSUs are subject to time-based vesting, with vesting in three equal tranches on August 17, 2027, 2028, and 2029, conditioned on continued service through each vesting date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/17/2026 - 04:54 PM Accepted by SEC EDGAR 08/17/2026 - 04:54 PM

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Costello Keith Conan

(Last)

(First)

(Middle)

C/O 1700 S. PAVILION CENTER DRIVE

SUITE 330

(Street)

LAS VEGAS

NEVADA

89135

(City)

(State)

(Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Rimini Street, Inc. [ RMNI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
	EVP & Chief Operating Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock								0	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Employee Stock Options (Right to Buy)	$4.96	08/17/2026		A		150,000		⁽¹⁾	08/17/2036	Common Stock	150,000	$0	150,000	D
Restricted Stock Units	⁽²⁾	08/17/2026		A		150,000		⁽³⁾	⁽³⁾	Common Stock	150,000	$0	150,000	D

Explanation of Responses:

1. 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.

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

3. 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.

Remarks:

	/s/ Celeste Rasmussen Peiffer, as Attorney-in-Fact	08/17/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

Source: View Original Filing on SEC EDGAR