Company: STAA
Filing Date: 2025-09-19
Form Type: DEFA14A
Source: 0001193125-25-209066
Chunk: 0

Company: STAAR SURGICAL CO
Filing Date: 2025-09-19
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES EXCHANGE ACT OF 1934 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 under § 240.14a-12 |

STAAR SURGICAL COMPANY (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 14a6(i)(1) and 0-11. |

On September 19, 2025, STAAR Surgical Company (“STAAR”), via ProxyVote, sent the following email to holders of STAAR common stock as of the close of business on September 12, 2025:

### STAAR SURGICAL COMPANY
2025 Special Meeting

October 23, 2025

| VOTE NOW |

| Why Should I Vote?                                                                                                                                                                                             
 Your vote is important because the merger is subject to                                                                                                                                                        
 approval by the holders of a majority of STAAR’s outstanding shares of common stock. Failure to vote will have the same effect as an “AGAINST” vote. To help ensure you receive the compelling, premium $28.00 
 per share cash value afforded by the Alcon merger please vote “FOR” the merger proposal and compensation proposal, each as described further in STAAR’s definitive proxy statement dated September 16,         
 2025, TODAY.                                                                                                                                                                                                   |

| Ways to Vote |     |              |     |                 |
| ProxyVote    |     | 800.690.6903 |     | Virtual Meeting |

Important Information For holders as of the close of business on September 12, 2025

This email represents the following share(s):

| STAAR SURGICAL COMPANY- RSP |     |