Company: AEGOF
Filing Date: 2025-05-16
Form Type: 6-K
Source: 0001193125-25-121246
Chunk: 0

Company: AEGON LTD.
Filing Date: 2025-05-16
Form: 6-K
Chunk 0
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Securities and Exchange Commission Washington, D.C. 20549 Form 6-K Report of Foreign Issuer Pursuant to Rule 13a-16or 15d/16 of the Securities Exchange Act of 1934 May 2025 Aegon Ltd.

| Aegon Limited                      
 An exempted company with liability |     | Statutory seat     
 Canon’s Court      |     | Principle place of business 
 Aegonplein 50               |     | Bermuda Registrar of Companies number: 202302830        
 (September 30, 2023)                                    |
|:-----------------------------------|:----|:-------------------|:----|:----------------------------|:----|:--------------------------------------------------------|
| limited by shares                  |     | 22 Victoria Street |     | 2591 TV                     |     | Dutch Chamber of Commerce number: 27076669              |
|                                    |     | Hamilton HM 12     |     | The Hague                   |     | Aegon Limited is a non-resident company under the Dutch |
| www.aegon.com                      |     | Bermuda            |     | The Netherlands             |     | Act Non Residential Companies                           |

Aegon’s trading update press release, dated May 16, 2025, is included as appendix and incorporated herein by reference. SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

| Date: May 16, 2025 |     | Aegon Ltd.                                
 (Registrant)                              
 By                                        |     | S. Knol |
|:-------------------|:----|:------------------------------------------|:----|:--------|
|                    |     | S. Knol                                   |     |         |
|                    |     | Director Financial Reporting & Operations |     |         |

Aegon trading update for first quarter 2025

| • |     | Operating capital generation (OCG) before holding funding and operating expenses increases 4% to EUR 
 267 million. Reflects business growth partially offset by unfavorable mortality experience in the US |

| • |     | Capital ratios of Aegon’s main units remain above their respective operating levels |

| • |     | Planned new EUR 200 million share buyback program announced, expected to be completed by the end of 2025,   
 consistent with the plan to bring Cash Capital at Holding down to around EUR 1