Company: STAA
Filing Date: 2025-11-07
Form Type: DEFA14A
Source: 0001193125-25-271794
Chunk: 17

Company: STAAR SURGICAL CO
Filing Date: 2025-11-07
Form: DEFA14A
Chunk 17
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: David Endicott                          |     |                        |
| Title:  Chief Executive Officer and President |     |                        |
| STAAR Surgical Company                        |     |                        |
| By:                                           |     | /s/ Stephen C. Farrell |
| Name: Stephen C. Farrell                      |     |                        |
| Title:  Chief Executive Officer               |     |                        |

[Signature Page to Amendment No. 1 to Agreement and Plan of Merger]

Exhibit 99.1 STAAR Surgical Announces Amendments to Alcon Merger Agreement 30-Day Go-ShopPeriod to Actively Solicit Other Third-Party Proposals No Termination Fee Payable to Alcon if STAAR Terminates Merger Agreement to Accept a Superior Proposal from a Qualified Bidder Alcon Waives All Matching Rights for Third-Party Proposals Alcon Waives Information Rights During the Go Shop Period Alcon to Engage with STAAR Stockholders to Solicit Support in Favor of the Merger Proposal STAAR Special Meeting of Stockholders Postponed to December 19, 2025 to Provide Time for Third-Party Proposals LAKE FOREST, Calif, November 7, 2025 –STAAR Surgical Company (NASDAQ: STAA), the global leader in phakic IOLs with the EVO family of Implantable Collamer ®Lenses (EVO ICL ™) for vision correction, today announced that the Company has agreed with Alcon Inc. (SIX/NYSE: ALC) to amend their merger agreement to allow proactive solicitation by STAAR of third-party proposals to maximize value for all STAAR stockholders. The amended agreement includes:

| • |     | No matching rights for third-party proposals: Alcon has agreed to give up any matching rights should a 
 superior proposal be made during the go-shop period.                                                   |

| • |     | Limited information rights: Until the end of the go-shop period,                                                         
 STAAR is not required to notify Alcon regarding any bids it receives, further fostering a fair and open go-shop process. |

| • |     | No termination fee payable by STAAR: STAAR is not required to pay a termination fee to Alcon if                                                                                                                                                  
 STAAR terminates the amended merger agreement to accept a superior proposal from a qualified bidder or if Alcon terminates because the STAAR board changes its recommendation with respect to a superior proposal from a qualified bidder, which 
 further incentivizes any interested third party to submit