Company: MGY
Filing Date: 2025-03-20
Form Type: DEF 14A
Source: 0001558370-25-003377
Chunk: 4

Company: Magnolia Oil & Gas Corp
Filing Date: 2025-03-20
Form: DEF 14A
Chunk 4
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 and returning the enclosed proxy card.

| Internet                                                                                                                                                                                                                                           |     |   | Phone                                                                                                                             |     |   | Mail                                                                                                                                                                                                                                                       |
| Go to www.proxyvote.com: You can use the Internet 24 hours a day to transmit your voting instructions. Have your proxy card or Notice of Internet Availability of Proxy Materials in hand when you access the website and follow the instructions. |     | ​ | Call 1-800-690-6903: You can use any touchtone telephone. Have your proxy card in hand when you call and follow the instructions. |     | ​ | If you received a printed copy of the proxy materials, you may submit your vote by completing, signing, and dating your proxy card and returning it in the prepaid envelope to Vote Processing, c/o Broadridge, 51 Mercedes Way, Edgewood, New York 11717. |

Notice of 2025 Annual Meeting of Stockholders

The Notice of Internet Availability of Proxy Materials for the 2025 Annual Meeting (the “Notice”), this proxy statement and the form of proxy card are first being sent or made available to stockholders on or about March 20, 2025, along with instructions on accessing our 2024 Form 10-K. The Notice, which will be mailed to most of our stockholders, provides instructions on how to access and review proxy materials over the Internet and submit proxies electronically. We believe the Notice process allows us to provide our stockholders with relevant information in a timely manner, while saving costs and reducing the environmental impact of our Annual Meeting. If you received the Notice and would instead prefer to receive a paper copy of the materials, you should follow the instructions for requesting such materials provided in the Notice. We appreciate the confidence you have placed in us through your investment. By order of the Board of Directors, Timothy D. Yang Executive Vice President, General Counsel, Corporate Secretary and Land

The Notice of Internet Availability of Proxy Materials for the 2025 Annual Meeting (the “Notice”), the proxy statement for the 2025 Annual Meeting of Stockholders of Magnolia Oil & Gas Corporation (the “Annual Meeting”) and our Annual Report on Form 10-K for the fiscal year ended December 31, 2024 (the “2024 Form 10-K”) are available at: www.proxyvote.com. You may vote electronically over the Internet using the instructions on the Notice, by telephone, or, if you received a paper copy of the proxy card, by signing and returning it in the envelope