Company: OSIS
Filing Date: 2025-10-22
Form Type: DEF 14A
Source: 0001104659-25-101517
Chunk: 54

Company: OSI SYSTEMS INC
Filing Date: 2025-10-22
Form: DEF 14A
Chunk 54
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 business on October 15, 2025 will receive a Notice of Internet Availability of Proxy Materials. The Notice of Internet Availability of Proxy Materials contains instructions about how to access the Proxy Materials and vote via the Internet without attending the Annual Meeting. If you receive a Notice of Internet Availability of Proxy Materials but would instead prefer to receive a printed copy of the Proxy Materials rather than downloading them from the Internet, you may do so by following the instructions for requesting such materials included in the Notice of Internet Availability of Proxy Materials. VOTING PROCEDURES

| ​ | ​ | YOUR VOTE IS VERY IMPORTANT.                                                                                                                                                                                                                                                                                                                                                                                                                                                             
 Whether or not you plan to attend the Annual Meeting, please vote as soon as possible. Your vote will ensure your representation at the Annual Meeting if you cannot attend in person. If you later desire to revoke your proxy for any reason, you may do so in the manner described in the attached Proxy Statement. Please refer to the proxy materials or the information forwarded by your bank, broker or other holder of record to see which voting methods are available to you. |   |   |                                                        |   |   |                                                                        |   |   |                  |   |   |                                       | ​ | ​ |
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| ​ | ​ | INTERNET                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 | ​ | ​ | TELEPHONE                                              | ​ | ​ | MAIL                                                                   | ​ | ​ | MOBILE DEVICE    | ​ | ​ | AT THE MEETING                        | ​ | ​ |
| ​ | ​ | Place your vote viaInternet, 24/7, atwww.proxyvote.com                                                                                                                                                                                                                                                                                                                                                                                                                                   | ​ | ​ | Call toll-free, 24/7,(if US or Canada)1 (800) 690-6903 | ​ | ​ | Sign, date and returnyour proxy card or votinginstruction form by mail | ​ | ​ | Scan the QR code | ​ | ​ | Attend themeeting and castyour ballot | ​ | ​ |

OSI SYSTEMS, INC. 2025 Proxy Statement | 59

TABLE OF CONTENTS Information about the Annual Meeting and Voting If you are a stockholder that receives a printed copy of the Proxy Materials by mail, you may view the Proxy Materials on the Internet at http://www.proxyvote.com . However, in order to direct your vote without attending the Annual Meeting you must complete