Company: CAG
Filing Date: 2025-07-15
Form Type: 424B5
Source: 0001104659-25-067959
Chunk: 1

Company: CONAGRA BRANDS INC.
Filing Date: 2025-07-15
Form: 424B5
Chunk 1
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 series of notes on any securities exchange or to have the notes quoted on any automated quotation system. Neither the Securities and Exchange Commission (the “SEC”) nor any state securities commission has approved or disapproved of the notes or determined if this prospectus supplement or the accompanying prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

| ​                    
 Per 20   Note        | ​ 
 ​ | ​ 
 ​ | Public OfferingPrice(1) 
 ​                       | ​ | %  | ​ | ​ 
 ​ | ​ 
 ​ | UnderwritingDiscount 
 ​                    | ​ | %  | ​ | ​ 
 ​ | ​ 
 ​ | Proceeds (beforeexpenses) to ConagraBrands, Inc. 
 ​                                                | ​ | %  | ​ | ​ 
 ​ |
|:---------------------|:--|:--|:------------------------|:--|:---|:--|:--|:--|:---------------------|:--|:---|:--|:--|:--|:-------------------------------------------------|:--|:---|:--|:--|
| Total for 20   Notes | ​ | ​ | ​                       | $ |    | ​ | ​ | ​ | ​                    | $ |    | ​ | ​ | ​ | ​                                                | $ |    | ​ | ​ |
| Per 20   Note        | ​ | ​ | ​                       | ​ | ​% | ​ | ​ | ​ | ​                    | ​ | ​% | ​ | ​ | ​ | ​                                                | ​ | ​% | ​ | ​ |
| Total for 20   Notes | ​ | ​ | ​                       | $ |    | ​ | ​ | ​ | ​                    | $ |    | ​ | ​ | ​ | ​                                                | $ |    | ​ | ​ |
| Total                | ​ | ​ | ​                       | $ |    | ​ | ​ | ​ | ​                    | $ |    | ​ | ​ | ​ | ​                                                | $ | ​  | ​ | ​ |

(1) Plus accrued interest from July , 2025 if settlement occurs after that date, which is the business day following the date of this prospectus supplement (such settlement being referred to as “T+ ”). Investing in the notes involves risks that are described or referred to in the “Risk Factors” section beginning on page S-6of this prospectus supplement.