Guardant Health (GH) director sells 1,300 shares after option exercise

Rhea-AI Filing Summary

Guardant Health, Inc. director Manuel Hidalgo Medina reported option exercises and share sales in company stock. On March 6, 2026, he exercised a stock option for 1,000 shares at a price of $0.00 per share, receiving 1,000 shares of common stock valued at $32.55 per share in the transaction record.

The same day, he sold a total of 1,300 shares of common stock in open-market transactions at average prices of $91.6065 and $91.3001 per share, leaving him with 1,193 common shares held directly after the sales. The underlying stock option was originally granted on July 17, 2024 and vests over four years, with 25% vesting after one year and the remainder vesting monthly over the following three years.

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

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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^*

Hidalgo Medina Manuel

(Last) (First) (Middle)

3100 HANOVER STREET

(Street)

PALO ALTO CA 94304

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2026

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

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

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

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	03/06/2026		M		1,000	A	$32.55	2,493	D
Common Stock	03/06/2026		S		1,000	D	$91.6065	1,493	D
Common Stock	03/06/2026		S		300	D	$91.3001	1,193	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
Stock Option (Right to Buy)	$32.55	03/06/2026		M			1,000	(1)	07/17/2034	Common Stock	1,000	$0	14,029	D

Explanation of Responses:

1. This represents a stock option award granted on July 17, 2024 and vests over a four-year period. 25% of the shares subject to such award vested on the one-year anniversary of July 17, 2024 and the remaining 75% vests monthly for the three-year period thereafter.

Remarks:

	/s/ John G. Saia, as attorney-in-fact for Manuel Hidalgo Medina	03/09/2026
	** 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.

FAQ

What insider transactions did GH director Manuel Hidalgo Medina report?

Manuel Hidalgo Medina reported exercising options for 1,000 Guardant Health (GH) shares and selling 1,300 common shares. The trades occurred on March 6, 2026 and involved direct ownership, combining derivative exercise with open-market stock sales on the same day.

How many Guardant Health (GH) shares did the director sell and at what prices?

He sold 1,300 Guardant Health (GH) common shares on March 6, 2026. The reported sales were 1,000 shares at an average price of $91.6065 and 300 shares at an average price of $91.3001 in open-market or private transactions.

What stock options did the Guardant Health (GH) director exercise?

He exercised a stock option for 1,000 Guardant Health (GH) shares on March 6, 2026. The option is part of an award granted July 17, 2024 that vests over four years, with 25% vesting after one year and the rest vesting monthly thereafter.

How many Guardant Health (GH) shares does the director hold after these transactions?

Following the March 6, 2026 trades, Manuel Hidalgo Medina directly holds 1,193 Guardant Health (GH) common shares. This figure reflects the 1,000 shares received from the option exercise and the subsequent open-market sales totaling 1,300 shares reported in the filing.

What is the vesting schedule of the Guardant Health (GH) stock option involved?

The option was granted July 17, 2024 and vests over four years. Twenty-five percent of the Guardant Health (GH) shares vested on the first anniversary, with the remaining 75% vesting in equal monthly installments over the following three-year period.