Guardant Health CTO exercises RSUs for shares

Guardant Health Chief Technology Officer Darya Chudova had 8,705 Restricted Stock Units convert into Common Stock on May 15, 2026.

Rhea-AI Filing Summary

Guardant Health Chief Technology Officer Darya Chudova had 8,705 Restricted Stock Units convert into Common Stock on May 15, 2026. To cover tax obligations, 4,679 shares of Common Stock were retained by Guardant Health, and she now directly holds 74,402 shares.

Insights

Insider transactions analyst

Routine RSU vesting with tax withholding; no open-market trading.

Darya Chudova, Chief Technology Officer of Guardant Health, reported the vesting of 8,705 restricted stock units, which converted into common shares. This is compensation-related and coded as a derivative exercise rather than an open-market purchase.

The filing also shows 4,679 shares were retained by the company to meet tax withholding obligations tied to this vesting. The footnote clarifies the retained amount did not exceed the tax liability, indicating a standard tax-settlement mechanism rather than a discretionary sale.

After these transactions, Chudova directly held 79,081 common shares and 8,706 restricted stock units. In scale and nature, these actions appear routine and compensation-driven, so they do not materially change the investment thesis for Guardant Health based solely on this filing.

Insider Trade Summary

8,705 shares exercised/converted

Exercise 3 txns

Insider Chudova Darya

Role Chief Technology Officer

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	8,705	$0.00	$0.00
Exercise	Common Stock	8,705	$0.00	$0.00
Exercise Price or Tax Liability	Common Stock	4,679	$94.92	$444K

Holdings After Transaction: Restricted Stock Units — 8,706 contracts (Direct); Common Stock — 74,402 shares (Direct)

Footnotes (3)

1. F1. These shares were retained by the Company in order to meet the tax withholding obligations of the award-holder in connection with the vesting of an installment of the restricted stock units. The amount retained by the Company was not in excess of the amount of the tax liability.
2. F2. This represents a restricted stock unit award granted on August 7, 2023 and vests over a four-year period. 25% of the shares subject to such award vested on May 15, 2024 and the remaining 75% vests annually during the three-year period thereafter.
3. F3. Not applicable for Restricted Stock Units.

Key Figures

RSUs converted to Common Stock: 8,705 shares Shares withheld for taxes: 4,679 shares Tax withholding price: $94.92 per share +4 more

7 metrics

RSUs converted to Common Stock 8,705 shares Restricted Stock Units converted into Common Stock on May 15, 2026

Shares withheld for taxes 4,679 shares Common Stock retained by the company to meet tax withholding obligations

Tax withholding price $94.92 per share Per-share value used for the 4,679-share tax withholding on May 15, 2026

Direct Common Stock holdings 74,402 shares Common Stock directly held by Darya Chudova after the reported transactions

RSU award grant date August 7, 2023 Grant date of the Restricted Stock Unit award that vests over four years

Initial RSU vesting tranche 25% Portion of the RSU award that vested on May 15, 2024

Remaining RSU vesting 75% RSU award vesting annually over the subsequent three-year period

Key Terms

Restricted Stock Units, tax withholding obligations, Exercise or conversion of derivative security

3 terms

Restricted Stock Units financial

"8,705 Restricted Stock Units 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.

tax withholding obligations financial

"meet the tax withholding obligations of the award-holder"

Exercise or conversion of derivative security financial

"transaction_code_description: Exercise or conversion of derivative security"

FAQ

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

What insider transaction did Guardant Health (GH) report for CTO Darya Chudova?

Guardant Health reported that Chief Technology Officer Darya Chudova had 8,705 Restricted Stock Units convert into Common Stock on May 15, 2026. These shares came from a multi-year RSU award and increased her direct ownership position in Guardant Health over time.

How many Guardant Health (GH) shares does Darya Chudova hold after this Form 4?

After the RSU conversion and tax withholding events, Darya Chudova directly holds 74,402 shares of Guardant Health Common Stock. This total reflects her position following the conversion of 8,705 Restricted Stock Units into Common Stock on May 15, 2026.

Why were 4,679 Guardant Health (GH) shares withheld in this transaction?

Guardant Health retained 4,679 shares of Common Stock to satisfy Darya Chudova’s tax withholding obligations tied to the RSU vesting. According to the disclosure, the amount retained was not greater than the associated tax liability for this vesting installment, as noted in the footnote.

What is the vesting schedule of Darya Chudova’s August 7, 2023 RSU award at GH?

The RSU award was granted on August 7, 2023 and vests over four years. Twenty-five percent of the shares vested on May 15, 2024, with the remaining 75% scheduled to vest in equal annual installments over the following three years.

Were Darya Chudova’s Guardant Health (GH) transactions under a Rule 10b5-1 plan?

The Rule 10b5-1 checkbox in the report is unchecked, indicating these transactions were not carried out under a Rule 10b5-1 trading plan. No additional footnote describes any separate pre-arranged trading arrangement for this RSU vesting and tax withholding event by the company.

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

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Accepted by SEC EDGAR 05/19/2026 - 06:01 PM 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^*

Chudova Darya

(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)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/15/2026

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	05/15/2026		M		8,705	A	$0	79,081	D
Common Stock	05/15/2026		F		4,679(1)	D	$94.92	74,402	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	05/15/2026		M			8,705	(2)	(3)	Common Stock	8,705	$0	8,706	D

Explanation of Responses:

1. These shares were retained by the Company in order to meet the tax withholding obligations of the award-holder in connection with the vesting of an installment of the restricted stock units. The amount retained by the Company was not in excess of the amount of the tax liability.

2. This represents a restricted stock unit award granted on August 7, 2023 and vests over a four-year period. 25% of the shares subject to such award vested on May 15, 2024 and the remaining 75% vests annually during the three-year period thereafter.

3. Not applicable for Restricted Stock Units.

Remarks:

	/s/ John G. Saia, as attorney-in-fact for Darya Chudova	05/19/2026
	** 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)