Guardant Health (GH) director Mignone gains 264 shares through RSU vesting

Q: How many Guardant Health (GH) common shares does Roberto Mignone hold after this filing?

After the RSU conversion, Roberto Mignone directly holds 4,751 shares of Guardant Health common stock. These shares result from equity compensation activity and reflect his direct ownership position as of the reported transaction date in the Form 4.

Q: What are the vesting terms of Roberto Mignone’s Guardant Health (GH) RSU grant?

The RSU award granted on November 8, 2024 vests over four years . 25% of the shares vested on October 21, 2025 , and the remaining 75% vests in monthly installments during the following three-year period, subject to continued service.

Q: Was the Guardant Health (GH) Form 4 a market buy or sell of shares?

No. The Form 4 reflects RSU vesting and conversion , not an open-market buy or sell. 264 RSUs converted into common shares at a stated price of $0.00, representing routine equity compensation rather than a trading decision.

Filing Impact

(Neutral)

Filing Sentiment

(Neutral)

Form Type

Rhea-AI Filing Summary

Guardant Health, Inc. director Roberto Mignone acquired 264 common shares through RSU vesting. On April 21, 2026, 264 Restricted Stock Units converted into 264 shares of common stock at a stated price of $0.00 per share, reflecting equity compensation rather than an open-market purchase or sale.

Following the transaction, Mignone directly holds 4,751 shares of common stock and 7,920 Restricted Stock Units. The RSUs come from an award granted on November 8, 2024 that vests over four years. According to the award terms, 25% of the RSUs vested on October 21, 2025, and the remaining 75% vests in equal monthly installments over the next three years.

Insider Trade Summary

264 shares exercised/converted

Mixed 2 txns

Insider MIGNONE ROBERTO

Role null

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

Holdings After Transaction: Restricted Stock Units — 7,920 shares (Direct, null); Common Stock — 4,751 shares (Direct, null)

Footnotes (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. Not applicable for Restricted Stock Units.

Key Figures

Common shares acquired: 264 shares Common shares held after: 4,751 shares RSUs held after: 7,920 RSUs +3 more

6 metrics

Common shares acquired 264 shares RSU conversion on April 21, 2026

Common shares held after 4,751 shares Direct ownership after April 21, 2026 transaction

RSUs held after 7,920 RSUs Outstanding Restricted Stock Units after transaction

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

Initial vesting tranche 25% of RSUs Vested on October 21, 2025

Remaining vesting portion 75% of RSUs Vests monthly over following three years

Key Terms

Restricted Stock Units, Form 4, vests over a four-year period, derivative security

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.

Form 4 regulatory

"INSIDER FILING DATA (Form 4):"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

vests over a four-year period financial

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

derivative security financial

"transaction_code_description": "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.

Form 4 Insider Transactions: What Each Field Means →

04/22/2026 - 06:17 PM

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)
04/21/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	04/21/2026		M		264	A	$0	4,751	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Restricted Stock Units	$0	04/21/2026		M			264	⁽¹⁾	⁽²⁾	Common Stock	264	$0	7,920	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	04/22/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

What did Guardant Health (GH) director Roberto Mignone report on this Form 4?

Director Roberto Mignone reported the vesting and conversion of 264 Restricted Stock Units into 264 common shares of Guardant Health on April 21, 2026. This is a compensation-related equity transaction, not an open-market stock purchase or sale.

How many Guardant Health (GH) common shares does Roberto Mignone hold after this filing?

After the RSU conversion, Roberto Mignone directly holds 4,751 shares of Guardant Health common stock. These shares result from equity compensation activity and reflect his direct ownership position as of the reported transaction date in the Form 4.

How many Restricted Stock Units does Roberto Mignone still hold at Guardant Health (GH)?

Following the April 21, 2026 transaction, Roberto Mignone holds 7,920 Restricted Stock Units in Guardant Health. These RSUs continue to vest over time according to the award’s four-year vesting schedule described in the Form 4 footnotes.

What are the vesting terms of Roberto Mignone’s Guardant Health (GH) RSU grant?

The RSU award granted on November 8, 2024 vests over four years. 25% of the shares vested on October 21, 2025, and the remaining 75% vests in monthly installments during the following three-year period, subject to continued service.

Was the Guardant Health (GH) Form 4 a market buy or sell of shares?

No. The Form 4 reflects RSU vesting and conversion, not an open-market buy or sell. 264 RSUs converted into common shares at a stated price of $0.00, representing routine equity compensation rather than a trading decision.