Family trust of Guardant Health (NASDAQ: GH) director sells 6,876 shares in open market

Rhea-AI Filing Summary

Guardant Health, Inc. director Ian T. Clark reported an indirect open-market sale of the company’s Common Stock. On May 20, 2026, a family trust associated with him sold 6,876 shares at a weighted average price of $106.9006 per share, in multiple trades between $106.85 and $106.99. Following the transaction, the trust held 2,975 shares of Guardant Health Common Stock indirectly on his behalf, and no derivative securities were reported in this filing.

Insider Trade Summary

Net Seller: 6,876 shares ($735,049)

Net Sell 1 txn

Insider CLARK IAN T

Role null

Sold 6,876 shs ($735K)

Type	Security	Shares	Price	Value
Sale	Common Stock	6,876	$106.9006	$735K

Holdings After Transaction: Common Stock — 2,975 shares (Indirect, By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account)

Footnotes (1)

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Key Figures

Shares sold: 6,876 shares Weighted average sale price: $106.9006 per share Post-transaction holdings: 2,975 shares +1 more

4 metrics

Shares sold 6,876 shares Open-market sale of Guardant Health Common Stock on May 20, 2026

Weighted average sale price $106.9006 per share Average price for 6,876 shares sold on May 20, 2026

Post-transaction holdings 2,975 shares Indirectly held by The Thornton-Clark Family Trust after sale

Sale price range $106.85–$106.99 per share Range of individual trade prices within the May 20, 2026 sale

Key Terms

open-market sale, indirect ownership, weighted average sales price, Common Stock

4 terms

open-market sale financial

"transaction_action: open-market sale"

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

indirect ownership financial

"ownership_type: indirect; nature_of_ownership describes family trust"

weighted average sales price financial

"Represents the weighted average sales price per share."

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 Insider Transactions: What Each Field Means →

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^*

CLARK IAN T

(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)
05/20/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/20/2026		S		6,876	D	$106.9006(1)	2,975	I	By The Thornton-Clark Family Trust, J Thornton-Clark & I Clark TTE Account

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Represents the weighted average sales price per share. These shares were sold in multiple transactions at prices ranging from $106.85 to $106.99. 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.

Remarks:

	/s/ John G. Saia, as attorney-in-fact for Ian T. Clark	05/22/2026
	** 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)

FAQ

What insider transaction did Guardant Health (GH) report for Ian T. Clark?

Guardant Health director Ian T. Clark reported an indirect open-market sale of 6,876 shares of Common Stock on May 20, 2026. The sale was executed through a family trust associated with him, not as a direct personal holding.

At what price did the Guardant Health (GH) shares sell in Ian T. Clark’s Form 4?

The shares sold at a weighted average price of $106.9006 per share, with individual trades executed between $106.85 and $106.99. The filing notes multiple transactions within this range and offers full pricing details upon request.

How many Guardant Health (GH) shares does Ian T. Clark’s trust hold after the sale?

After the reported sale, the Thornton-Clark Family Trust holds 2,975 shares of Guardant Health Common Stock indirectly for Ian T. Clark. This figure reflects the position immediately following the May 20, 2026 open-market transaction.

Is Ian T. Clark’s Guardant Health (GH) transaction a direct or indirect holding?

The transaction involves indirect ownership. The 6,876 shares sold and the remaining 2,975 shares are held by The Thornton-Clark Family Trust, identified in the filing as an indirect beneficial ownership account for Ian T. Clark.

Were any derivative securities reported in Ian T. Clark’s Guardant Health (GH) Form 4?

No derivative securities were reported in this Form 4. The filing lists only a non-derivative position in Common Stock, reflecting the open-market sale of 6,876 shares and the remaining indirect holdings of 2,975 shares.