GRAIL CFO Aaron Freidin sells 4,100 shares

The sales were made under a Rule 10b5-1 trading plan adopted December 11, 2025.

Rhea-AI Filing Summary

GRAIL, Inc. Chief Financial Officer Aaron Freidin sold 4,100 shares of common stock on September 21, 2026, across three transactions: 1,779 shares at a weighted average of $92.2631 per share, 1,800 at $93.9156, and 521 at $95.0000. The first weighted-average price reflects sales from $92.19 to $93.00 inclusive; the second reflects sales from $93.89 to $94.33 inclusive. The sales were made under a Rule 10b5-1 trading plan adopted December 11, 2025.

Insider Trade Summary 10b5-1

Net Seller: 4,100 shares

Net Sell 3 txns

Insider Freidin Aaron

Role Chief Financial Officer

Sold 4,100 shs ($383K)

Type	Security	Shares	Price	Value
Sale	Common Stock F2, F1	1,779	$92.2631	$164K
Sale	Common Stock F3, F1	1,800	$93.9156	$169K
Sale	Common Stock F1	521	$95.00	$49K

Holdings After Transaction: Common Stock — 248,983 shares (Direct)

Footnotes (3)

1. F1. The sale transactions reported in this Form 4 are made pursuant to a Rule 10b5-1 trading plan adopted on December 11, 2025
2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.19 to $93.00 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate sales price within the range set forth in this footnote
3. F3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.89 to $94.33 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate sales price within the range set forth in this footnote

Key Figures

Common shares sold: 4,100 shares Shares sold: 1,779 shares Weighted average sale price: $92.2631 per share +4 more

7 metrics

Common shares sold 4,100 shares Across three transactions on September 21, 2026

Shares sold 1,779 shares September 21, 2026 transaction

Weighted average sale price $92.2631 per share For 1,779 shares; sales ranged from $92.19 to $93.00 inclusive

Shares sold 1,800 shares September 21, 2026 transaction

Weighted average sale price $93.9156 per share For 1,800 shares; sales ranged from $93.89 to $94.33 inclusive

Shares sold 521 shares September 21, 2026 transaction

Sale price $95.0000 per share For 521 shares on September 21, 2026

Key Terms

Rule 10b5-1 trading plan, weighted average price

2 terms

Rule 10b5-1 trading plan regulatory

"made pursuant to a Rule 10b5-1 trading plan"

A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.

weighted average price financial

"The price reported in Column 4 is a weighted average price"

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many GRAL shares did CFO Aaron Freidin sell, and at what prices?

Aaron Freidin sold 4,100 shares on September 21, 2026: 1,779 shares at a weighted average of $92.2631 per share, 1,800 at $93.9156, and 521 at $95.0000. The first two weighted averages covered sales within ranges of $92.19 to $93.00 inclusive and $93.89 to $94.33 inclusive, respectively. The sales were made under a Rule 10b5-1 trading plan adopted December 11, 2025.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 09/23/2026 - 04:37 PM Accepted by SEC EDGAR 09/23/2026 - 04:37 PM Learn about SEC filing dates

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).

X

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^*

Freidin Aaron

(Last) (First) (Middle)

C/O GRAIL, INC.

250 S. MATHILDA AVE. SUITE 100

(Street)

SUNNYVALE CALIFORNIA 94086

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
GRAIL, Inc. [ GRAL ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Financial Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/21/2026

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	09/21/2026		S		1,779	D(1)	$92.2631(2)	251,304	D
Common Stock	09/21/2026		S		1,800	D(1)	$93.9156(3)	249,504	D
Common Stock	09/21/2026		S		521	D(1)	$95	248,983	D

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. The sale transactions reported in this Form 4 are made pursuant to a Rule 10b5-1 trading plan adopted on December 11, 2025

2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $92.19 to $93.00 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate sales price within the range set forth in this footnote

3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $93.89 to $94.33 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate sales price within the range set forth in this footnote

Remarks:

	/s/Abram Barth, as Attorney-in-Fact for Aaron Freidin	09/23/2026
	** 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)