SEC Form 4 reporting owner

Talasaz AmirAli

Talasaz AmirAli has filed 51 Form 4 transactions reported between December 8, 2025 and August 21, 2026, as Co-Chief Executive Officer of Guardant Health, Inc..

Name as filed: Talasaz AmirAli

Open-market buys, 24 mo

None

reported

Open-market sales, 24 mo

$79.0M

25 lines

Companies

with Form 4 filings

Latest transaction

Aug 21, 2026

transaction date

Roles and reported holdings

GHGuardant Health, Inc.
Dec 8, 2025 – Aug 21, 2026
Co-Chief Executive Officer
Held directly2,013,457 sh as of Jan 1, 2026 · Form 4
Held indirectly (latest line)37,500 sh as of Aug 21, 2026 · Form 4
24 months: $79.0M sold

Transaction history

All 51 reported transactions, newest first. Every row links to the Form 4 on SEC EDGAR.

Date	Company	Type	Shares	Price	Value	Owned after	Filing
Aug 21, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	7,589	$170.29	$1.3M@ $170.29	37,500	Form 4
Aug 21, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	20,888	$169.16	$3.5M@ $169.16	45,089	Form 4
Aug 21, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	9,023	$168.20	$1.5M@ $168.20	65,977	Form 4
Aug 10, 2026	GHCo-Chief Executive Officer	GiftCode G · indirect	75,000	—	—	1,824,351	Form 4
Jul 1, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	17,086	$170.77	$2.9M@ $170.77	1,899,351	Form 4
Jul 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	9,715	—	—	1,916,437	Form 4
Jul 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	23,997	—	—	1,906,722	Form 4
Jun 30, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	1,428	$150.03	$214K@ $150.03	1,882,725	Form 4
Jun 30, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	2,817	—	—	1,884,153	Form 4
Jun 29, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	40	$153.00	$6K@ $153.00	1,881,336	Form 4
Jun 29, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	46,663	$152.20	$7.1M@ $152.20	1,881,376	Form 4
Jun 29, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	70,513	$151.47	$10.7M@ $151.47	1,928,039	Form 4
Jun 29, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	25,812	$150.53	$3.9M@ $150.53	1,998,552	Form 4
Jun 29, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	143,028	$4.18	$598K@ $4.18	2,024,364	Form 4
Jun 26, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	52,935	$151.16	$8.0M@ $151.16	1,881,336	Form 4
Jun 26, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	64,037	$150.49	$9.6M@ $150.49	1,934,271	Form 4
Jun 26, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	111,804	$4.18	$467K@ $4.18	1,998,308	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	26,352	$112.76	$3.0M@ $112.76	1,886,504	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	37,900	$112.02	$4.2M@ $112.02	1,912,856	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	37,163	$111.14	$4.1M@ $111.14	1,950,756	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	28,908	$110.10	$3.2M@ $110.10	1,987,919	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	9,852	$108.97	$1.1M@ $108.97	2,016,827	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	33,069	$108.11	$3.6M@ $108.11	2,026,679	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	21,171	$106.99	$2.3M@ $106.99	2,059,748	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	1,200	$105.88	$127K@ $105.88	2,080,919	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	11,919	$105.01	$1.3M@ $105.01	2,082,119	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	1,366	$103.82	$142K@ $103.82	2,094,038	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	900	$102.57	$92K@ $102.57	2,095,404	Form 4
May 20, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	200	$100.95	$20K@ $100.95	2,096,304	Form 4
May 12, 2026	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	50,000	$100.32	$5.0M@ $100.32	2,096,504	Form 4
Apr 1, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	17,087	$91.15	$1.6M@ $91.15	2,146,504	Form 4
Apr 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	9,716	—	—	2,163,591	Form 4
Apr 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	23,997	—	—	2,153,875	Form 4
Mar 31, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	1,428	$92.37	$132K@ $92.37	2,129,878	Form 4
Mar 31, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	2,817	—	—	2,131,306	Form 4
Mar 17, 2026	GHCo-Chief Executive Officer	Grant or awardCode A · direct	101,409	—	—	101,409	Form 4
Mar 17, 2026	GHCo-Chief Executive Officer	Grant or awardCode A · direct	11,268	—	—	11,268	Form 4
Mar 13, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	13,664	$85.49	$1.2M@ $85.49	2,128,489	Form 4
Mar 13, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	26,961	—	—	2,142,153	Form 4
Jan 1, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · indirect	19,402	$102.14	$2.0M@ $102.14	2,115,192	Form 4
Jan 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · indirect	38,283	—	—	2,134,594	Form 4
Jan 1, 2026	GHCo-Chief Executive Officer	Other acquisition or dispositionCode J · direct	13,209	—	—	0	Form 4
Jan 1, 2026	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · direct	10,788	$102.14	$1.1M@ $102.14	2,013,457	Form 4
Jan 1, 2026	GHCo-Chief Executive Officer	Option exerciseCode M · direct	23,997	—	—	2,024,245	Form 4
Dec 31, 2025	GHCo-Chief Executive Officer	Shares withheld for tax or exercise priceCode F · direct	2,441	$102.14	$249K@ $102.14	2,000,248	Form 4
Dec 31, 2025	GHCo-Chief Executive Officer	Option exerciseCode M · direct	4,815	—	—	2,002,689	Form 4
Dec 8, 2025	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	4,240	$106.00	$449K@ $106.00	168,223	Form 4
Dec 8, 2025	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	30,760	$105.34	$3.2M@ $105.34	172,463	Form 4
Dec 8, 2025	GHCo-Chief Executive Officer	Open-market saleCode S · indirect	15,000	$104.21	$1.6M@ $104.21	203,223	Form 4
Dec 8, 2025	GHCo-Chief Executive Officer	Other acquisition or dispositionCode J · indirect	193,973	—	—	218,223	Form 4
Dec 8, 2025	GHCo-Chief Executive Officer	Other acquisition or dispositionCode J · indirect	387,946	—	—	82,854	Form 4

How this page is built

Every row comes from a Form 4 filed with the SEC, which officers, directors and holders of more than 10% of a company’s stock must file within two business days of a trade. Transactions are grouped by the reporting owner’s name as filed (spacing, capitals and punctuation ignored); two different people filing under an identical name would appear together, and one person filing under two spellings appears on two pages.

Open-market totals count code P purchases and code S sales over the last 24 months. The same trade reported on more than one filing is counted once; when another owner (for example a fund and its general partner) reports the identical trade, they are listed beside it. Holdings are the shares owned after the latest purchase, sale, gift or tax-withholding line, shown separately for direct and indirect ownership; an indirect figure is one holding line, not a total across every trust or entity.

This page describes what was filed with the SEC; it is not investment advice or a recommendation to buy or sell any security.