Personalis CMO sells 3,998 shares at $16.22

Personalis’ President and CMO reported an automatic share sale to cover taxes on vested RSUs, outside any Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Personalis, Inc. (PSNL) reported that President and CMO Richard Chen recorded an insider transaction on September 18, 2026. He sold 3,998 shares of common stock at $16.22 per share, leaving him with 169,882 shares held directly. According to the footnote, the shares were automatically sold to cover tax withholding obligations from the settlement of vested restricted stock units, and no Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Net Seller: 3,998 shares

Net Sell 1 txn

Insider Chen Richard

Role President and CMO

Sold 3,998 shs ($65K)

Type	Security	Shares	Price	Value
Sale	Common Stock F1	3,998	$16.22	$65K

Holdings After Transaction: Common Stock — 169,882 shares (Direct)

Footnotes (1)

1. F1. Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units.

Key Figures

Shares sold: 3,998 shares Sale price per share: $16.22 per share Shares held after transaction: 169,882 shares

3 metrics

Shares sold 3,998 shares Common stock sold by Richard Chen on September 18, 2026

Sale price per share $16.22 per share Price for the 3,998 PSNL shares sold

Shares held after transaction 169,882 shares Direct holdings of Richard Chen following the reported sale

Key Terms

restricted stock units, tax withholding obligation, open market or private transaction

3 terms

restricted stock units financial

"from settlement of vested restricted stock units"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

tax withholding obligation financial

"sold to cover tax withholding obligation from settlement"

open market or private transaction financial

"Sale in open market or private transaction"

FAQ

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

What insider transaction did PSNL’s President and CMO report?

Richard Chen, President and CMO of Personalis, reported a sale of 3,998 shares of common stock on September 18, 2026 at $16.22 per share in an open-market or private transaction.

Why were Richard Chen’s PSNL shares sold in this Form 4?

The filing states the 3,998 shares were automatically sold to cover tax withholding obligations arising from the settlement of vested restricted stock units, indicating a tax-related, administrative transaction rather than a discretionary portfolio trade.

How many PSNL shares does Richard Chen hold after this transaction?

After the September 18, 2026 sale, Richard Chen directly holds 169,882 shares of Personalis common stock, as reported in the Form 4.

Was the PSNL insider sale made under a Rule 10b5-1 trading plan?

No. The Form 4 indicates no Rule 10b5-1 trading plan for this transaction, and there is no footnote stating that the sale was made pursuant to such a pre-arranged plan.

What was the sale price for the PSNL shares in this Form 4?

The reported sale price was $16.22 per share for the 3,998 shares of Personalis common stock sold on September 18, 2026.

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

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Available on EDGAR 09/22/2026 - 04:10 PM Accepted by SEC EDGAR 09/22/2026 - 04:10 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).

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^*

Chen Richard

(Last) (First) (Middle)

C/O PERSONALIS, INC.

6600 DUMBARTON CIRCLE

(Street)

FREMONT CALIFORNIA 94555

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Personalis, Inc. [ PSNL ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CMO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/18/2026

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	09/18/2026		S		3,998(1)	D	$16.22	169,882	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. Shares automatically sold to cover tax withholding obligation from settlement of vested restricted stock units.

	/s/ Aaron Tachibana, Attorney-in-Fact	09/22/2026
	** 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)