Company: CI
Filing Date: 2025-09-04
Form Type: 424B5
Source: 0001140361-25-033868
Chunk: 2

Company: Cigna Group
Filing Date: 2025-09-04
Form: 424B5
Chunk 2
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 |     $5,000,000 |     | 0.450%      |     |     $6,750,000 |     | 0.875%      |     |    $6,562,500 |
| Proceeds, before expenses, to The Cigna Group(1) |     | 99.444%    |     | $994,440,000 |     | 99.592%    |     | $1,244,900,000 |     | 99.359%     |     | $1,490,385,000 |     | 98.168%     |     |  $736,260,000 |

| (1) | Plus accrued interest, if any, from September 4, 2025 to the date of delivery |

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense. The underwriters expect to deliver the Notes in book-entry form only through the facilities of The Depository Trust Company, against payment in New York, New York on or about September 4, 2025. Joint Book-Running Managers

| BofA Securities |     | Citigroup |     | HSBC |     | Morgan Stanley |

Passive Bookrunners

| J.P. Morgan |     | PNC Capital Markets LLC |     | US Bancorp |     | Wells Fargo Securities |

Co-Managers

| Credit Agricole CIB    |     | Deutsche Bank Securities |     | Goldman Sachs & Co. LLC |     | Mizuho                     |     | MUFG                |
| Truist Securities      |     | BNY Capital Markets      |     | Fifth Third Securities  |     | Huntington Capital Markets |     | RBC Capital Markets |
| Regions Securities LLC |     | Scotiabank               |     | SMBC Nikko              |     | TD Securities              |     |                     |

September 2, 2025

#### TABLE OF CONTENTS
Neither we nor the underwriters have authorized any other person to provide you with different or additional information other than that contained in or incorporated by reference in this prospectus supplement and the accompanying prospectus and in any related free writing prospectus filed by the Company with the Securities and Exchange Commission (the “SEC”). We and the underwriters take no responsibility for, and can provide no assurance as