Company: ISRG
Filing Date: 2025-03-14
Form Type: DEFA14A
Source: 0001035267-25-000100
Chunk: 0

Company: INTUITIVE SURGICAL INC
Filing Date: 2025-03-14
Form: DEFA14A
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, D.C. 20549

#### SCHEDULE 14A
<div align='center'>(Rule 14a-101)</div>

### INFORMATION REQUIRED IN PROXY STATEMENT

#### SCHEDULE 14A INFORMATION
<div align='center'>Proxy Statement Pursuant to Section 14(a) of the Securities</div>

#### Exchange Act of 1934
Filed by the Registrant x

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                                                     |
| x |     | Definitive Additional Materials                                                |
| ¨ |     | Soliciting Material Pursuant to Section 240.14a-12                             |

#### INTUITIVE SURGICAL, INC.
<div align='center'>(Name of Registrant as Specified In Its Charter)</div>

| (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 14a-6(i)(1) and 0-11. |