Roberto A. Mignone - 21 Aug 2026 Form 4 Insider Report for Guardant Health, Inc. (GH)

Reporting relationship: Director
Issuer ticker: GH
Reported as of: 21 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 24 Aug 2026, 17:20:49 UTC
Prior SEC filing: 22 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ John G. Saia, as attorney-in-fact for Roberto A. Mignone

Key filing fact

Roberto A. Mignone filed Form 4 for Guardant Health, Inc. (GH) on 24 Aug 2026.

Key facts

This page summarizes Roberto A. Mignone's Form 4 filing for Guardant Health, Inc. (GH).
2 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 24 Aug 2026, 17:20.

Change

Previous filing in this sequence was filed on 22 Jul 2026.
Current net transaction value: $0.

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 0001258394 Primary reporting owner

MIGNONE ROBERTO

Relationship: Director
Address: 3100 HANOVER STREET, PALO ALTO
Signature: /s/ John G. Saia, as attorney-in-fact for Roberto A. Mignone
Signature date: 24 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: +264
Change %: +2.7%
Price: $0.000000^*
Shares after: 10,010
Date: 21 Aug 2026
Ownership: Direct

Reported derivative securities

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

GH transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -264
Change %: -3.7%
Price: $0.000000^*
Shares after: 6,864
Date: 21 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 264
Exercise price: $0.000000
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

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.

Footnote F2

Not applicable for Restricted Stock Units.