Intuitive Surgical (ISRG) executive sells 312 shares under 10b5-1 plan

Rhea-AI Filing Summary

Intuitive Surgical executive Mark Brosius reported an amended insider transaction showing an open-market sale of 312 shares of Common Stock at $547.36 per share on December 12, 2025. After this sale, he directly owned 595 shares.

The sale was executed under a pre-arranged Rule 10b5-1 trading plan that is scheduled to expire on February 14, 2027. This Form 4/A corrects the third transaction line from his Form 4 filed on December 15, 2025, which had incorrectly reported that transaction’s details, while all other information in the original filing remained accurate.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Brosius Mark

(Last) (First) (Middle)

1020 KIFER ROAD

(Street)

SUNNYVALE CA 94086

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
INTUITIVE SURGICAL INC [ ISRG ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

3. Date of Earliest Transaction (Month/Day/Year)
12/12/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)
12/15/2025

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	12/12/2025(2)		S(1)		312(2)	D	$547.36(2)	595(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The transaction took place in accordance with a Trading Plan that complies with SEC Rule 10b5-1 and expires on February 14, 2027.

2. The third transaction line in Table I of the Form 4 filed by the Reporting Person on 12/15/2025 incorrectly reported the transaction details. The transaction line as reported herein has been restated to correct the errors in the original Form 4. Except as otherwise noted in this footnote, all other information disclosed in the Reporting Person's original Form 4 was accurately reported.

Remarks:

SVP & Chief Mfg and Supply Chain Officer

	By: Thanh Nhan Phan For: Brosius, Mark	12/17/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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FAQ

What insider transaction did Mark Brosius report for Intuitive Surgical (ISRG)?

Mark Brosius reported an open-market sale of 312 shares of Intuitive Surgical Common Stock. The transaction occurred on December 12, 2025, at a price of $547.36 per share, and was disclosed in an amended Form 4 filing.

Was Mark Brosius’s ISRG stock sale part of a 10b5-1 trading plan?

Yes, the 312-share sale was executed under a Trading Plan that complies with SEC Rule 10b5-1. The filing states this plan is pre-arranged and is scheduled to expire on February 14, 2027, helping automate sales independent of day-to-day market decisions.

How many Intuitive Surgical (ISRG) shares does Mark Brosius hold after this transaction?

After selling 312 shares, Mark Brosius directly holds 595 shares of Intuitive Surgical Common Stock. This post-transaction ownership figure is reported in the amended Form 4 and reflects his remaining direct stake after the disclosed sale.

Why is this Intuitive Surgical (ISRG) Form 4 filing labeled as an amendment (Form 4/A)?

It is an amendment because the original Form 4 filed on December 15, 2025, contained incorrect details in the third transaction line. The amended filing restates that line to correct the errors while leaving all other originally reported information unchanged.

What specific error did the amended Form 4 for Intuitive Surgical (ISRG) correct?

The amendment corrects incorrectly reported transaction details in the third transaction line of the original Form 4. The new Form 4/A restates that line with accurate information and confirms that all other data in the original filing was accurate as previously disclosed.

On what date did Mark Brosius’s reported Intuitive Surgical (ISRG) stock sale occur?

The reported sale of 312 Intuitive Surgical Common Stock shares by Mark Brosius took place on December 12, 2025. This date is explicitly listed as the transaction date in the amended Form 4 filing with the Securities and Exchange Commission.