Intuitive Surgical EVP sells 36 shares under 10b5-1 plan

Intuitive Surgical executive Mark Brosius reported small open-market sales of company stock under a pre-set trading plan.

Accepted by SEC EDGAR 05/22/2026 - 08:09 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Intuitive Surgical executive Mark Brosius reported small open-market sales of company stock under a pre-set trading plan. The EVP & Chief Manufacturing and Supply Chain sold 18 shares of Common Stock on May 21, 2026 at $446.04 per share and another 18 shares on May 22, 2026 at $439.80 per share. These transactions were carried out pursuant to a Rule 10b5-1 Trading Plan that expires on February 14, 2027. After these sales, Brosius directly holds 1,523 shares of Intuitive Surgical Common Stock.

Insider Trade Summary 10b5-1

Net Seller: 36 shares

Net Sell 2 txns

Insider Brosius Mark

Role EVP & Chief Mfg and Supply Cha

Sold 36 shs ($16K)

Share of Position Sold 2.3%

Type	Security	Shares	Price	Value
Sale	Common Stock	18	$439.80	$8K
Sale	Common Stock	18	$446.04	$8K

Holdings After Transaction: Common Stock — 1,523 shares (Direct)

Holdings Before and After: Common Stock, 1,559 to 1,523 shares (Direct)

Other Insiders: 2 other insiders reported open-market sales of this stock in the 30 days up to this filing.

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 May 21, 2026: 18 shares at $446.04 Shares sold May 22, 2026: 18 shares at $439.80 Total shares sold: 36 shares +2 more

5 metrics

Shares sold May 21, 2026 18 shares at $446.04 Open-market sale of Common Stock

Shares sold May 22, 2026 18 shares at $439.80 Open-market sale of Common Stock

Total shares sold 36 shares Net shares sold across both transactions

Shares held after transactions 1,523 shares Direct ownership of Common Stock after sales

Trading plan expiry February 14, 2027 Expiration of Rule 10b5-1 Trading Plan

Key Terms

Rule 10b5-1, Trading Plan, open-market sale, Common Stock

4 terms

Rule 10b5-1 regulatory

"The transaction took place in accordance with a Trading Plan that complies with SEC Rule 10b5-1"

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 financial

"The transaction took place in accordance with a Trading Plan that complies with SEC Rule 10b5-1"

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 sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

FAQ

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

What did Intuitive Surgical (ISRG) executive Mark Brosius report in this Form 4?

Mark Brosius reported selling 36 shares of Intuitive Surgical Common Stock in two open-market transactions. The sales occurred on May 21 and 22, 2026 and were executed under a pre-established Rule 10b5-1 Trading Plan that governs the timing and size of trades.

How many Intuitive Surgical (ISRG) shares did Mark Brosius sell and at what prices?

Mark Brosius sold 18 shares at $446.04 per share on May 21, 2026, and 18 shares at $439.80 per share on May 22, 2026. In total, he disposed of 36 shares through these open-market sales reported in the Form 4 filing.

How many Intuitive Surgical (ISRG) shares does Mark Brosius hold after these transactions?

Following the reported sales, Mark Brosius directly holds 1,523 shares of Intuitive Surgical Common Stock. This post-transaction balance reflects the remaining shares after the two open-market sales totaling 36 shares disclosed in the Form 4 filing.

Were Mark Brosius’s Intuitive Surgical (ISRG) stock sales made under a Rule 10b5-1 plan?

Yes. The filing states that the transactions occurred under a Trading Plan that complies with SEC Rule 10b5-1 and expires on February 14, 2027. Such plans allow pre-scheduled trades, helping separate personal trading decisions from nonpublic information.

What type of transactions did Mark Brosius report for Intuitive Surgical (ISRG) stock?

The Form 4 reports two open-market sales of Intuitive Surgical Common Stock, each coded as “S” for sale. Both involve non-derivative securities, meaning they are direct stock sales rather than exercises or conversions of options or other derivative instruments.

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

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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)
05/21/2026

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	05/21/2026		S(1)		18	D	$446.04	1,541	D
Common Stock	05/22/2026		S(1)		18	D	$439.8	1,523	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: Stephanie Lim-Ignacio For: Brosius, Mark	05/22/2026
	** 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)