Company: OSIS
Filing Date: 2025-10-22
Form Type: DEFA14A
Source: 0001104659-25-101525
Chunk: 0

Company: OSI SYSTEMS INC
Filing Date: 2025-10-22
Form: DEFA14A
Chunk 0
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<div align='center'>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 (Amendment No. )</div>

| Filed by the Registrant x                  |                                                                                 |
| Filed by a Party other than the Registrant 
 o                                          |                                                                                 |
| Check the appropriate box:                 |                                                                                 |
| o                                          | Preliminary Proxy Statement                                                     |
| o                                          | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) |
| o                                          | Definitive Proxy Statement                                                      |
| x                                          | Definitive Additional Materials                                                 |
| o                                          | Soliciting Material under §240.14a-12                                           |

| OSI                                                             
 Systems, Inc.                                                   |
| (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): |                                                                                |
| x                                                  | 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.                                                           |