Company: BRK-A
Filing Date: 2025-03-14
Form Type: DEFA14A
Source: 0001193125-25-054882
Chunk: 0

Company: BERKSHIRE HATHAWAY INC
Filing Date: 2025-03-14
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ |     | Preliminary Proxy Statement                                                    |
| ☐ |     | Confidential for Use of the Commission Only (as permitted by Rule 14a-6[e][2]) |
| ☐ |     | Definitive Proxy Statement                                                     |
| ☒ |     | Definitive Additional Materials                                                |
| ☐ |     | Soliciting Material Pursuant to § 240.14a-12                                   |

BERKSHIRE HATHAWAY INC. (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement if other than the Registrant) Payment of Filing Fee (Check the appropriate box):

| ☒ |     | No fee required                                                                                     |
| ☐ |     | Fee paid previously with preliminary materials.                                                     |
| ☐ |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11 |

| CHI Health Center Omaha 
 455 North 10th Street   
 Omaha, Nebraska         |

Important Notice Regarding the Availability of Proxy Materials for the Shareholder Meeting to be Held on May 3, 2025. Notice is hereby given that the Annual Meeting of Shareholders of Berkshire Hathaway Inc. will be held on May 3, 2025. This communication presents only an overview of the more complete proxy materials that are available to you on the Internet. We encourage you to access and review all of the important information contained in the proxy materials before voting.

| The Proxy Statement and Annual Report are available at |     | www.berkshirehathaway.com/eproxy |

If you want to receive a paper copy or an email with links to the electronic materials, you must request one. There is no charge to you for requesting a copy. Please make your request for a copy as instructed on the reverse side of this notice on or before April 21, 2025 to facilitate timely delivery. Matters intended to be acted upon at the meeting are listed below. The Board of Directors recommends a vote FORAll Nominees: 1.