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  4. [Form 4] INTUITIVE SURGICAL INC Insider Trading Activity

Intuitive Surgical (NASDAQ: ISRG) EVP sells under 10b5-1 plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

INTUITIVE SURGICAL INC (ISRG) reported that executive vice president and Chief Manufacturing and Supply Chain officer Mark Brosius sold a total of 154 shares of common stock in two open-market transactions on August 20 and 21, 2026, at prices of $396.37 and $375.57 per share. Both sales were made pursuant to a pre-arranged Trading Plan that complies with SEC Rule 10b5-1 and is disclosed as expiring on February 14, 2027.

Positive

  • None.

Negative

  • None.
Insider Brosius Mark
Role EVP & Chief Mfg and Supply Cha
Sold 154 shs ($59K)
Type Security Shares Price Value
Sale Common Stock F1 77 $375.57 $29K
Sale Common Stock F1 77 $396.37 $31K
Holdings After Transaction: Common Stock — 881 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.
Shares sold (total) 154 shares of Common Stock Aggregate across two reported sales by Mark Brosius
Shares sold on 2026-08-20 77 shares at $396.37 per share Open-market or private sale of ISRG Common Stock
Shares sold on 2026-08-21 77 shares at $375.57 per share Open-market or private sale of ISRG Common Stock
Rule 10b5-1 Trading Plan expiration February 14, 2027 Plan governing the reported sales
Number of sale transactions 2 transactions Non-derivative Common Stock sales reported in this Form 4
Rule 10b5-1 regulatory
"Trading Plan that complies with SEC Rule 10b5-1 and expires on February 14, 2027"
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 that complies"
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 or private transaction financial
"transaction_code_description: Sale in open market or private transaction"

FAQ

What insider transactions did ISRG report in this Form 4?
The filing reports that Mark Brosius, an executive vice president of INTUITIVE SURGICAL INC (ISRG), sold 154 shares of common stock in two open-market transactions on August 20 and 21, 2026.

How many ISRG shares did Mark Brosius sell and at what prices?
Mark Brosius sold 77 shares of ISRG common stock at $396.37 per share on August 20, 2026, and 77 shares at $375.57 per share on August 21, 2026, for a total of 154 shares sold.

Were the ISRG insider sales by Mark Brosius under a Rule 10b5-1 plan?
Yes. The filing states each transaction "took place in accordance with a Trading Plan that complies with SEC Rule 10b5-1" and that this plan expires on February 14, 2027.

What type of transactions were reported in this ISRG Form 4?
Both transactions are classified with code S, described as a sale in open market or private transaction, involving ISRG Common Stock held directly by the reporting person.

Does the Form 4 show any ISRG derivative securities for Mark Brosius?
No. The Form 4 transaction data describe only non-derivative Common Stock sales, and the derivative securities summary section is empty in this filing.

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

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
EVP & Chief Mfg and Supply Cha
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/20/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock08/20/2026S(1)77D$396.37958D
Common Stock08/21/2026S(1)77D$375.57881D
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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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, Mark08/21/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR