Company: STAA
Filing Date: 2025-11-07
Form Type: DEFA14A
Source: 0001193125-25-271794
Chunk: 1

Company: STAAR SURGICAL CO
Filing Date: 2025-11-07
Form: DEFA14A
Chunk 1
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 ☐ | Soliciting material pursuant to Rule 14a-12 under the Exchange Act 
 (17 CFR 240.14a-12)                                                |

| ☐ | Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) |

| ☐ | Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) |

Securities registered pursuant to Section 12(b) of the Act:

| Title of each class |     | Trading   
 Symbol(s) |     | Name of each exchange 
 on which registered   |
| Common              |     | STAA      |     | NASDAQ                |

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2of the Securities Exchange Act of 1934 (§240.12b-2of this chapter). Emerging growth company ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

| Item 1.01. | Entry into a Material Definitive Agreement. |

On November 7, 2025, STAAR Surgical Company (the “Company”) entered into Amendment No. 1 (the “Amendment”) to the Agreement and Plan of Merger, dated August 4, 2025 (the “Merger Agreement” and as amended by the Amendment, the “Amended Merger Agreement”), with Alcon Research, LLC (“Alcon”) and Rascasse Merger Sub, Inc. (“Merger Sub”). The Amendment provides that from November 7, 2025 until 11:59 p.m. (Eastern Time) on December 6, 2025 (the “go-shopperiod”), the Company may solicit, facilitate and encourage (including by furnishing non-publicinformation) any Acquisition Proposals (as defined in the Amended Merger Agreement) from third parties and engage in discussions or negotiations regarding any such proposals. The Amendment further provides that at the end of the go-shopperiod, the non-solicitationrestrictions in the Amended Merger Agreement will become applicable,