Guardant director exercises RSUs, adds 528 shares

Guardant Health director Roberto Mignone reported routine equity compensation activity, exercising restricted stock units (RSUs) into common shares.

Rhea-AI Filing Summary

Guardant Health director Roberto Mignone reported routine equity compensation activity, exercising restricted stock units (RSUs) into common shares. On May 21, 2026 and June 21, 2026, RSU conversions of 264 shares each delivered a total of 528 common shares at a stated price of $0.00 per share.

After these transactions, Mignone directly held 9,482 shares of Guardant Health common stock and 7,392 RSUs. Footnotes explain that the RSU award was granted on November 8, 2024 and vests over four years, with 25% vesting on October 21, 2025 and the remaining 75% vesting monthly over the following three years.

Insider Trade Summary

528 shares exercised/converted

Exercise 4 txns

Insider MIGNONE ROBERTO

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	264	$0.00	$0.00
Exercise	Common Stock	264	$0.00	$0.00
Exercise	Restricted Stock Units	264	$0.00	$0.00
Exercise	Common Stock	264	$0.00	$0.00

Holdings After Transaction: Restricted Stock Units — 7,392 contracts (Direct); Common Stock — 9,482 shares (Direct)

Footnotes (2)

1. F1. The restricted stock unit award granted on November 8, 2024 vests over a four-year period. 25% of the shares subject to such award vested on October 21, 2025 and the remaining 75% vests monthly for the three-year period thereafter.
2. F2. Not applicable for Restricted Stock Units.

Key Figures

RSUs exercised total: 528 shares Shares after June 21 transaction: 9,482 shares RSUs remaining after June 21: 7,392 units +3 more

6 metrics

RSUs exercised total 528 shares Two exercises of 264 RSUs on May 21 and June 21, 2026

Shares after June 21 transaction 9,482 shares Common stock directly held following June 21, 2026 transaction

RSUs remaining after June 21 7,392 units Restricted Stock Units directly held after June 21, 2026

Single-day RSU conversion 264 shares Each of May 21 and June 21, 2026 exercises

RSU grant date November 8, 2024 Original Restricted Stock Unit award grant date

Initial cliff vesting 25% of award Portion vesting on October 21, 2025 under RSU award

Key Terms

Restricted Stock Units, vests over a four-year period, Exercise or conversion of derivative security, derivative

4 terms

Restricted Stock Units financial

"The restricted stock unit award granted on November 8, 2024 vests over a four-year period."

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.

vests over a four-year period financial

"The restricted stock unit award granted on November 8, 2024 vests over a four-year period."

Exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

derivative financial

"transaction_type: derivative for Restricted Stock Units transactions"

A derivative is a financial contract whose value depends on the price or performance of another asset or measure — for example a stock, index, interest rate, commodity, or currency. Investors use derivatives like insurance or leveraged bets to hedge risk, speculate, or gain exposure without owning the underlying asset; they can protect portfolios but also amplify losses and introduce counterparty and market risk.

FAQ

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

What insider transactions did Guardant Health (GH) director Roberto Mignone report?

Roberto Mignone reported exercising restricted stock units into common stock. On May 21 and June 21, 2026, 264 RSUs converted each date, resulting in 528 new common shares as part of his equity compensation vesting schedule.

How many Guardant Health (GH) shares does Roberto Mignone hold after these Form 4 transactions?

After the reported transactions, Roberto Mignone directly holds 9,482 Guardant Health common shares. He also holds 7,392 restricted stock units, which represent additional potential future common shares as they continue to vest under the original award terms.

What is the vesting schedule of Roberto Mignone’s Guardant Health (GH) RSU award?

The RSU award granted on November 8, 2024 vests over four years. Twenty-five percent vested on October 21, 2025, and the remaining 75% vests in equal monthly installments over the next three years, driving periodic conversions into common shares.

Were the Guardant Health (GH) insider transactions open-market buys or sales?

The reported transactions are exercises of restricted stock units, not open-market buys or sales. They reflect equity compensation vesting and conversion of RSUs into common stock at a stated price of zero dollars per share, rather than trading in the market.

How many restricted stock units did Roberto Mignone exercise in this Guardant Health (GH) filing?

He exercised a total of 528 restricted stock units, split into two transactions of 264 units each on May 21 and June 21, 2026. Each RSU converted into one share of common stock, increasing his direct common share holdings.

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

Form 4 Insider Transactions: What Each Field Means →

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Accepted by SEC EDGAR 06/23/2026 - 05:28 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).

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^*

MIGNONE ROBERTO

(Last) (First) (Middle)

3100 HANOVER STREET

(Street)

PALO ALTO CALIFORNIA 94304

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Guardant Health, Inc. [ GH ]

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)
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		M		264	A	$0	9,218	D
Common Stock	06/21/2026		M		264	A	$0	9,482	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	05/21/2026		M			264	(1)	(2)	Common Stock	264	$0	7,656	D
Restricted Stock Units	$0	06/21/2026		M			264	(1)	(2)	Common Stock	264	$0	7,392	D

Explanation of Responses:

1. The restricted stock unit award granted on November 8, 2024 vests over a four-year period. 25% of the shares subject to such award vested on October 21, 2025 and the remaining 75% vests monthly for the three-year period thereafter.

2. Not applicable for Restricted Stock Units.

Remarks:

	/s/ John G. Saia, as attorney-in-fact for Roberto A. Mignone	06/23/2026
	** 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)