Clark Ian T. - 05 Dec 2025 Form 4 Insider Report for Guardant Health, Inc. (GH)

Reporting relationship: Director
Issuer ticker: GH
Reported as of: 05 Dec 2025
Net transaction value: -$2,041,662
SEC form: 4
Accepted by SEC: 08 Dec 2025, 21:36:19 UTC
Prior SEC filing: 05 Aug 2025
Next SEC filing: 23 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ John G. Saia, as attorney-in-fact for Ian T. Clark

Key filing fact

Clark Ian T. filed Form 4 for Guardant Health, Inc. (GH) on 08 Dec 2025.

Key facts

This page summarizes Clark Ian T.'s Form 4 filing for Guardant Health, Inc. (GH).
9 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 08 Dec 2025, 21:36.

Change

Previous filing in this sequence was filed on 05 Aug 2025.
Current net transaction value: -$2,041,662.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001336504 Primary reporting owner

CLARK IAN T

Relationship: Director
Address: 3100 HANOVER STREET, PALO ALTO
Signature: /s/ John G. Saia, as attorney-in-fact for Ian T. Clark
Signature date: 08 Dec 2025

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

GH transaction

Common Stock

Options Exercise

Transaction value: $349,814
Shares: +9,105
Change %: +92%
Price: $38.42
Shares after: 18,956
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

GH transaction

Common Stock

Options Exercise

Transaction value: $334,558
Shares: +8,803
Change %: +46%
Price: $38.00
Shares after: 27,759
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

GH transaction

Common Stock

Options Exercise

Transaction value: $340,784
Shares: +10,703
Change %: +39%
Price: $31.84
Shares after: 38,462
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

GH transaction

Common Stock

Sale

Transaction value: $869,968
Shares: -8,156
Change %: -21%
Price: $106.67
Shares after: 30,306
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account
Footnotes: F1

GH transaction

Common Stock

Sale

Transaction value: $1,829,495
Shares: -17,055
Change %: -56%
Price: $107.27
Shares after: 13,251
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account
Footnotes: F2

GH transaction

Common Stock

Sale

Transaction value: $367,354
Shares: -3,400
Change %: -26%
Price: $108.05
Shares after: 9,851
Date: 05 Dec 2025
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account
Footnotes: F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

GH transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -9,105
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 9,105
Exercise price: $38.42
Footnotes: F4

GH transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -8,803
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 8,803
Exercise price: $38.00
Footnotes: F5

GH transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value: $0
Shares: -10,703
Change %: -100%
Price: $0.000000
Shares after: 0
Date: 05 Dec 2025
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,703
Exercise price: $31.84
Footnotes: F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

Represents the weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $105.88 to $106.87. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range.

Footnote F2

Represents the weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $106.88 to $107.87. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range.

Footnote F3

Represents the weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $107.885 to $108.480. The Reporting Person has provided to the Issuer, and undertakes to provide to the staff of the Securities and Exchange Commission or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range.

Footnote F4

The Stock Options vest in full on the one-year anniversary of the grant date, June 15, 2022 or the date of the next year annual stockholders meeting, whichever is earlier.

Footnote F5

The stock option vests in full on the one-year anniversary of the grant date, June 14, 2023 or the date of the next year annual stockholders meeting, whichever is earlier.

Footnote F6

The stock option vests in full on the one-year anniversary of the grant date, June 12, 2024 or the date of the next year annual stockholders meeting, whichever is earlier.