Company: AEGOF
Filing Date: 2025-08-21
Form Type: 6-K
Source: 0001193125-25-184596
Chunk: 0

Company: AEGON LTD.
Filing Date: 2025-08-21
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 August 2025 Aegon Ltd.

| Aegon Limited An exempted company with 
 liability limited by shares            |     | Statutory seat Canon’s Court 
 22 Victoria Street           |     | Principle place of business World Trade 
 Center Schiphol Boulevard 223           |     | Bermuda Registrar of Companies number: 202302830                                      
 (September 30, 2023)                                                                  |
|:---------------------------------------|:----|:-----------------------------|:----|:----------------------------------------|:----|:--------------------------------------------------------------------------------------|
| www.aegon.com                          |     | Hamilton HM 12 Bermuda       |     | 1118 BH Schiphol The                    
 Netherlands                             |     | Dutch Chamber of Commerce number: 27076669                                            
 Aegon Limited is a non-resident company under the Dutch Act Non Residential Companies |

Aegon’s press release, dated August 21, 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: August 21, 2025 |     | Aegon Ltd.                                
 (Registrant)                              
 By                                        |     | S. Knol |
|:----------------------|:----|:------------------------------------------|:----|:--------|
|                       |     | S. Knol                                   |     |         |
|                       |     | Director Financial Reporting & Operations |     |         |

Aegon reports first half year 2025 results 1H 2025 Financial highlights

| • |     | Net profit of EUR 606 million compared with a net loss of EUR 65 million for the first half of 2024 |

| • |     | Operating result of EUR 845 million, up 19% compared with the first half of 2024, reflecting business growth 
 and improved experience variance in the United States                                                        |

| • |     | Valuation equity – the sum of shareholders’ equity and the contractual service margin (CSM) after                                                                                                                
 estimated tax adjustment – per share of EUR 8.47; a reduction of 5% in the reporting period, as the