Personalis CFO sells 4,982 shares after option exercise

Personalis, Inc. executive Aaron Tachibana, the company’s CFO and COO, reported an exercise-and-sell transaction in company stock.

Rhea-AI Filing Summary

Personalis, Inc. executive Aaron Tachibana, the company’s CFO and COO, reported an exercise-and-sell transaction in company stock. He exercised stock options covering 4,982 shares of common stock at an exercise price of $5.32 per share, then sold 4,982 shares of common stock in an open-market sale at $14.00 per share. According to the disclosure, these trades were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on August 7, 2025, which means the timing was set in advance. After the transactions, Tachibana directly held 198,833 shares of Personalis common stock.

Insider Trade Summary 10b5-1

Exercise and Sale: 4,982 shares ($43K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Tachibana Aaron

Role CFO AND COO

Sold 4,982 shs ($70K)

Approx. gross sale proceeds $70K

Approx. exercise cost $27K

Approx. pre-tax spread $43K

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy)	4,982	$0.00	$0.00
Exercise	Common Stock	4,982	$5.32	$27K
Sale	Common Stock	4,982	$14.00	$70K

Holdings After Transaction: Stock Option (right to buy) — 2,489 contracts (Direct); Common Stock — 198,833 shares (Direct)

Footnotes (2)

1. F1. The sales and option exercise reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 7, 2025.
2. F2. The shares subject to the option are fully vested and exercisable.

Key Figures

Shares sold: 4,982 shares Sale price: $14.00 per share Options exercised: 4,982 shares +3 more

6 metrics

Shares sold 4,982 shares Open-market sale of common stock

Sale price $14.00 per share Price for 4,982 common shares sold

Options exercised 4,982 shares Common stock acquired via option exercise

Exercise price $5.32 per share Stock option exercise price

Shares held after 198,833 shares Direct common stock ownership post-transaction

Option expiration August 15, 2032 Expiration date of the stock option grant

Key Terms

Rule 10b5-1 trading plan, Stock Option (right to buy), open-market sale, Exercise or conversion of derivative security

4 terms

Rule 10b5-1 trading plan regulatory

"The sales and option exercise ... were effected 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.

Stock Option (right to buy) financial

"security_title: "Stock Option (right to buy)""

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.

Exercise or conversion of derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

FAQ

What insider transaction did Personalis (PSNL) report for Aaron Tachibana?

Personalis CFO and COO Aaron Tachibana exercised stock options for 4,982 shares and sold 4,982 common shares. The filing shows this as an exercise-and-sell sequence, with the option exercise priced at $5.32 and the sale at $14.00 per share.

At what prices did Aaron Tachibana exercise and sell Personalis (PSNL) shares?

Aaron Tachibana exercised options at an exercise price of $5.32 per share and sold 4,982 Personalis common shares at $14.00 per share. These prices highlight the spread between the option strike level and the market sale price reported in the filing.

How many Personalis (PSNL) shares does Aaron Tachibana hold after this Form 4?

After the reported transactions, Aaron Tachibana directly holds 198,833 shares of Personalis common stock. This post-transaction figure, disclosed in the filing, provides context for the relative size of the 4,982-share exercise and matching open-market sale.

Was Aaron Tachibana’s Personalis (PSNL) stock sale under a Rule 10b5-1 plan?

Yes. The footnotes state that the sales and option exercise were effected under a Rule 10b5-1 trading plan adopted on August 7, 2025. Such pre-arranged plans schedule trades in advance, making the timing more routine and less discretionary.

What type of securities did Aaron Tachibana exercise in the Personalis (PSNL) Form 4?

He exercised a stock option described as a “Stock Option (right to buy)” covering 4,982 shares of Personalis common stock. The option carried a $5.32 exercise price and remained outstanding in reduced amount after exercise, with an expiration date in August 2032.

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Accepted by SEC EDGAR 06/29/2026 - 05:50 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^*

Tachibana Aaron

(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)
	CFO AND COO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/29/2026

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	06/29/2026		M(1)		4,982	A	$5.32	203,815	D
Common Stock	06/29/2026		S(1)		4,982	D	$14	198,833	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
Stock Option (right to buy)	$5.32	06/29/2026		M(1)			4,982	(2)	08/15/2032	Common Stock	4,982	$0	2,489	D

Explanation of Responses:

1. The sales and option exercise reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on August 7, 2025.

2. The shares subject to the option are fully vested and exercisable.

	/s/ Aaron Tachibana	06/29/2026
	** 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)