Intuitive Surgical (ISRG) director adds shares and new RSU grant

Rhea-AI Filing Summary

INTUITIVE SURGICAL INC director Lewis Chew reported routine equity compensation changes. On April 30, 2026, he exercised 531 shares of restricted stock units into an equal number of common shares, bringing his direct common stock holdings to 1,314 shares after the transaction.

On the same date, he also received a new grant of 554 restricted stock units, each representing one share of common stock. According to the terms, 100% of these RSUs will vest on the earlier of one year from grant or the next Annual Meeting of Stockholders, assuming he continues in service.

Insider Trade Summary

531 shares exercised/converted

Mixed 3 txns

Insider CHEW LEWIS

Role null

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	531	$0.00	--
Grant/Award	Restricted Stock Units - 4-30-2026	554	$0.00	--
Exercise	Common Stock	531	$0.00	--

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct, null); Restricted Stock Units - 4-30-2026 — 554 shares (Direct, null); Common Stock — 1,314 shares (Direct, null)

Footnotes (1)

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Key Figures

RSUs exercised: 531 shares Common shares after transaction: 1,314 shares New RSU grant: 554 units +2 more

5 metrics

RSUs exercised 531 shares Restricted Stock Units converted to common stock on April 30, 2026

Common shares after transaction 1,314 shares Direct INTUITIVE SURGICAL INC common stock holdings after exercise

New RSU grant 554 units Restricted Stock Units granted on April 30, 2026

Underlying shares for new RSUs 554 shares Each new RSU corresponds to one share of common stock

Vesting condition 100% cliff vesting Earlier of one year from grant or next Annual Meeting of Stockholders

Key Terms

Restricted Stock Units, derivative security, Annual Meeting of Stockholders, equity compensation

4 terms

Restricted Stock Units financial

"The filing reports transactions in Restricted Stock Units that convert into common stock."

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

derivative security financial

"One transaction is described as an exercise or conversion of derivative security."

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

Annual Meeting of Stockholders financial

"100% of the RSUs shall vest on the earlier of the one year anniversary of the date of grant or the next Annual Meeting of Stockholders."

equity compensation financial

"These RSU grants and exercises function as part of the director’s equity compensation."

Equity compensation is pay given to employees, executives or contractors in the form of company ownership—such as stock, stock options or restricted shares—rather than just cash. It matters to investors because it can align workers' incentives with shareholders (like paying someone in slices of the same pie they help grow), but it also increases the number of shares outstanding and company expenses, affecting ownership percentages and earnings per share.

Form 4 Insider Transactions: What Each Field Means →

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).

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^*

CHEW LEWIS

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/30/2026

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	04/30/2026		M		531	A	$0.0	1,314	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
Restricted Stock Units	$0.0	04/30/2026		M			531	(1)	(1)	Common Stock	531	$0.0	0	D
Restricted Stock Units - 4-30-2026	$0.0	04/30/2026		A		554		(1)	(1)	Common Stock	554	$0.0	554	D

Explanation of Responses:

1. 100% of the RSUs shall vest on the earlier of the one year anniversary of the date of grant or the next Annual Meeting of Stockholders, subject to the Reporting Person's continued service.

	By: Stephanie Lim-Ignacio For: Chew, Lewis	04/30/2026
	** 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)

FAQ

What insider transactions did ISRG director Lewis Chew report on April 30, 2026?

Lewis Chew reported exercising 531 restricted stock units into 531 shares of INTUITIVE SURGICAL INC common stock and receiving a new grant of 554 restricted stock units, all dated April 30, 2026, as part of his equity compensation arrangements.

How many ISRG common shares does Lewis Chew hold after these Form 4 transactions?

After exercising 531 restricted stock units into common shares, Lewis Chew directly holds 1,314 shares of INTUITIVE SURGICAL INC common stock. This figure reflects his direct ownership immediately following the April 30, 2026 transactions reported in the Form 4 filing.

What are the terms of Lewis Chew’s new 554 RSU grant at Intuitive Surgical (ISRG)?

Lewis Chew received 554 restricted stock units, each tied to one share of common stock. All 554 RSUs vest 100% on the earlier of the one-year anniversary of the grant date or the next Annual Meeting of Stockholders, contingent on his continued service.

Did Lewis Chew sell any Intuitive Surgical (ISRG) shares in this Form 4 filing?

The filing shows no sales. It reports an exercise of 531 restricted stock units into common stock and a grant of 554 new restricted stock units, with all transactions classified as acquisitions or exercises rather than open-market or other share sales.

How are the derivative securities treated in Lewis Chew’s April 30, 2026 ISRG filing?

One block of 531 restricted stock units was exercised, reducing that derivative position to zero while creating 531 common shares. A separate award of 554 new restricted stock units was granted, establishing a fresh derivative position tied to future vesting conditions.