Ian T. Clark - 04 Aug 2026 Form 4 Insider Report for Guardant Health, Inc. (GH)

Reporting relationship: Director
Issuer ticker: GH
Reported as of: 04 Aug 2026
Net transaction value: -$2,253,451
SEC form: 4
Accepted by SEC: 05 Aug 2026, 17:05:29 UTC
Prior SEC filing: 23 Jun 2026
Source filing: View source filing
Reporting owner signature: /s/ John G. Saia, as attorney-in-fact for Ian T. Clark

Key filing fact

Ian T. Clark filed Form 4 for Guardant Health, Inc. (GH) on 05 Aug 2026.

Key facts

This page summarizes Ian T. Clark's Form 4 filing for Guardant Health, Inc. (GH).
6 reported transactions and 2 derivative rows are listed below.
Accepted by SEC: 05 Aug 2026, 17:05.

Change

Previous filing in this sequence was filed on 23 Jun 2026.
Current net transaction value: -$2,253,451.

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: 05 Aug 2026

Reported non-derivative transactions

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

GH transaction

Common Stock

Options Exercise

Transaction value
Shares: +2,255
Change %: +28%
Price: $91.11^*
Shares after: 10,322
Date: 04 Aug 2026
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

GH transaction

Common Stock

Options Exercise

Transaction value
Shares: +6,833
Change %: +66%
Price: $50.57^*
Shares after: 17,155
Date: 04 Aug 2026
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

GH transaction

Common Stock

Sale

Transaction value: $1,444,825
Shares: -9,088
Change %: -53%
Price: $158.98
Shares after: 8,067
Date: 04 Aug 2026
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account
Footnotes: F1

GH transaction

Common Stock

Sale

Transaction value: $808,626
Shares: -5,092
Change %: -63%
Price: $158.80
Shares after: 2,975
Date: 04 Aug 2026
Ownership: By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account
Footnotes: F2

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
Shares: -2,255
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 2,255
Exercise price: $91.11
Footnotes: F3

GH transaction Derivative

Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -6,833
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 04 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 6,833
Exercise price: $50.57
Footnotes: F4

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Represents the weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $158.510 to $159.435. 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 $158.51 to $159.14. 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

The stock option vested in full on June 12, 2020.

Footnote F4

The stock option vested in full on June 17, 2026.