William Hornbuckle - 02 Oct 2026 Form 4 Insider Report for MGM Resorts International (MGM)

Reporting relationship: CEO AND PRESIDENT, Director
Issuer ticker: MGM
Reported as of: 02 Oct 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 06 Oct 2026, 20:57:50 UTC
Prior SEC filing: 05 Aug 2026
Next SEC filing: 07 Oct 2026
Source filing: View source filing
Reporting owner signature: /s/ Jessica Cunningham, Attorney-In-Fact

Key filing fact

William Hornbuckle filed Form 4 for MGM Resorts International (MGM) on 06 Oct 2026.

Key facts

This page summarizes William Hornbuckle's Form 4 filing for MGM Resorts International (MGM).
9 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 06 Oct 2026, 20:57.

Change

Previous filing in this sequence was filed on 05 Aug 2026.
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 0001183302 Primary reporting owner

HORNBUCKLE WILLIAM

Relationship: CEO AND PRESIDENT, Director
Address: 3600 LAS VEGAS BLVD., S., LAS VEGAS
Signature: /s/ Jessica Cunningham, Attorney-In-Fact
Signature date: 06 Oct 2026

Reported non-derivative transactions

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

MGM transaction

Common Stock $.01 Par Value ND

Options Exercise

Transaction value
Shares: +27,181
Change %: +543620%
Price: $0.000000^*
Shares after: 27,186
Date: 02 Oct 2026
Ownership: Direct

MGM transaction

Common Stock $.01 Par Value ND

Tax liability

Transaction value
Shares: -10,696
Change %: -39%
Price: $30.48^*
Shares after: 16,490
Date: 02 Oct 2026
Ownership: Direct

MGM transaction

Common Stock $.01 Par Value ND

Options Exercise

Transaction value
Shares: +67,681
Change %: +410%
Price: $0.000000^*
Shares after: 84,171
Date: 02 Oct 2026
Ownership: Direct
Footnotes: F1

MGM transaction

Common Stock $.01 Par Value ND

Tax liability

Transaction value
Shares: -26,633
Change %: -32%
Price: $30.48^*
Shares after: 57,538
Date: 02 Oct 2026
Ownership: Direct

MGM transaction

Common Stock $.01 Par Value ND

Options Exercise

Transaction value
Shares: +32,672
Change %: +57%
Price: $0.000000^*
Shares after: 90,210
Date: 03 Oct 2026
Ownership: Direct

MGM transaction

Common Stock $.01 Par Value ND

Tax liability

Transaction value
Shares: -12,857
Change %: -14%
Price: $30.48^*
Shares after: 77,353
Date: 03 Oct 2026
Ownership: Direct

MGM holding

Common Stock $.01 Par Value ND

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 777,849
Date: 02 Oct 2026
Ownership: In trust
Footnotes: F2

Reported derivative securities

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

MGM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -27,181
Change %: -50%
Price: $0.000000^*
Shares after: 27,182
Date: 02 Oct 2026
Ownership: Direct
Underlying class: Common Stock $.01 Par Value ND
Underlying amount: 27,181
Exercise price
Footnotes: F3

MGM transaction Derivative

Performance Share Units

Options Exercise

Transaction value
Shares: -67,681
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 02 Oct 2026
Ownership: Direct
Underlying class: Common Stock $.01 Par Value ND
Underlying amount: 67,681
Exercise price
Footnotes: F1, F4

MGM transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -32,672
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 03 Oct 2026
Ownership: Direct
Underlying class: Common Stock $.01 Par Value ND
Underlying amount: 32,672
Exercise price
Footnotes: F5

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Represents the vesting of 88,185 performance share units (PSUs) granted on October 2, 2023, under the MGM Resorts International (Company) 2022 Omnibus Incentive Plan (Plan). Each PSU represented the right to receive between 0 and 1.6 shares of Company common stock depending upon the performance of the common stock from the grant date to the date that was three years after the grant date (Vesting Date), relative to a target price of $52.44 (Target Price). The Target Price is equal to 125% of the average closing price of Company common stock over the 60-calendar day period ending on the grant date. The number of shares issued per PSU, 0.767495 shares, was calculated by dividing the ending average stock price by the Target Price. For this purpose, the ending average stock price is the average closing price of Company common stock over the 60-day period ending on the Vesting Date.

Footnote F2

Reflects an adjustment to the previously reported balance to account for transfers of common stock from direct holdings to a revocable trust.

Footnote F3

Restricted Stock Units ("RSUs") granted under the MGM Resorts International ("Company") 2022 Omnibus Incentive Plan. Each RSU represents the right to receive, following vesting, one share of Company common stock. The RSUs vest in four equal annual installments commencing on the first anniversary of the grant date.

Footnote F4

PSUs granted under the Plan. Each PSU represents the right to receive between 0 and 1.6 shares of Company common stock depending upon the performance of the common stock from the grant date to the date that is three years after the grant date, relative to a target price of $52.44.

Footnote F5

RSUs granted under the Plan. Each RSU represents the right to receive, following vesting, one share of Company common stock. The RSUs vest in four equal annual installments commencing on the first anniversary of the grant date.