Intuitive Surgical EVP sells 231 ISRG shares

Rhea-AI Filing Summary

INTUITIVE SURGICAL INC (ISRG) executive Mark Brosius, EVP & Chief Manufacturing and Supply Chain, reported three small open-market sales of common stock, each for 77 shares, on August 17, 18, and 19, 2026, at per-share prices of $390.67, $394.00, and $394.26, respectively. All transactions were executed under a Rule 10b5-1 trading plan that the company states complies with SEC requirements and expires on February 14, 2027.

Insider Trade Summary 10b5-1

Net Seller: 231 shares

Net Sell 3 txns

Insider Brosius Mark

Role EVP & Chief Mfg and Supply Cha

Sold 231 shs ($91K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	77	$394.26	$30K
Sale	Common Stock F1	77	$394.00	$30K
Sale	Common Stock F1	77	$390.67	$30K

Holdings After Transaction: Common Stock — 1,035 shares (Direct)

Footnotes (1)

1. F1. The transaction took place in accordance with a Trading Plan that complies with SEC Rule 10b5-1 and expires on February 14, 2027.

Key Figures

Shares sold August 17, 2026: 77 shares Shares sold August 18, 2026: 77 shares Shares sold August 19, 2026: 77 shares +2 more

5 metrics

Shares sold August 17, 2026 77 shares Open-market sale of ISRG common stock at $390.67 per share

Shares sold August 18, 2026 77 shares Open-market sale of ISRG common stock at $394.00 per share

Shares sold August 19, 2026 77 shares Open-market sale of ISRG common stock at $394.26 per share

Total shares sold in filing 231 shares Sum of three reported open-market sales of ISRG common stock

Rule 10b5-1 plan expiration February 14, 2027 Expiration date of the trading plan governing the reported sales

Key Terms

Rule 10b5-1, Trading Plan, open market

3 terms

Rule 10b5-1 regulatory

"a Trading Plan that complies with SEC Rule 10b5-1 and expires"

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

Trading Plan regulatory

"The transaction took place in accordance with a Trading Plan"

A trading plan is a written set of rules an investor follows about what to buy or sell, when to enter and exit positions, and how much risk to accept—like a travel itinerary that maps the route, stops, and budget before a trip. It matters because it helps remove emotional decisions during market swings, enforces discipline, and makes performance easier to review and improve, reducing the chance of costly impulsive moves.

open market market

"Sale in open market or private transaction"

An open market is a system where buying and selling of goods, services, or financial assets happen freely without restrictions or special controls. For investors, it means they can trade assets easily and quickly, which helps determine fair prices based on supply and demand. This environment encourages transparency and competition, making it easier to buy or sell with confidence.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions were reported for ISRG by Mark Brosius on this Form 4?

The Form 4 reports that Mark Brosius sold 77 ISRG common shares on each of August 17, 18, and 19, 2026, in open-market transactions, as part of a pre-arranged Rule 10b5-1 trading plan expiring February 14, 2027.

How many ISRG shares did Mark Brosius sell in total in this filing?

The filing shows total reported sales of 231 ISRG common shares, consisting of three separate transactions of 77 shares each on consecutive days in August 2026, all coded as open-market sales under SEC transaction code S.

At what prices did Mark Brosius sell ISRG shares in these transactions?

The reported per-share sale prices were $390.67 on August 17, $394.00 on August 18, and $394.26 on August 19, 2026. Each transaction involved 77 shares of ISRG common stock in open-market trades.

Were the ISRG stock sales by Mark Brosius made under a Rule 10b5-1 plan?

Yes. The filing states that each transaction occurred under a Trading Plan that complies with SEC Rule 10b5-1, with the plan scheduled to expire on February 14, 2027, indicating the sales were pre-arranged rather than opportunistic.

What is Mark Brosius’s role at ISRG mentioned in this Form 4?

The Form 4 identifies Mark Brosius as an officer of INTUITIVE SURGICAL INC, serving as EVP & Chief Manufacturing and Supply Chain, and reports his transactions in ISRG common stock in that capacity as a company insider.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 08/19/2026 - 05:39 PM EDT Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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 CALIFORNIA 94086

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	EVP & Chief Mfg and Supply Cha

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/17/2026

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

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

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

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	08/17/2026		S(1)		77	D	$390.67	1,189	D
Common Stock	08/18/2026		S(1)		77	D	$394	1,112	D
Common Stock	08/19/2026		S(1)		77	D	$394.26	1,035	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.

	By: Nhan Phan For: Brosius, Mark	08/19/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)