Personalis CFO sells shares after exercising options

Personalis, Inc. CFO and COO Aaron Tachibana exercised stock options and sold shares in a planned transaction.

Rhea-AI Filing Summary

Personalis, Inc. CFO and COO Aaron Tachibana exercised stock options and sold shares in a planned transaction. He exercised options for 40,000 shares of common stock at an exercise price of $9.16 per share and then sold 40,000 shares in an open-market transaction at a weighted average price of $12.01 per share, within a range of $12.00 to $12.10. Following these transactions, he holds 198,833 shares of common stock directly and retains 28,832 stock options. The filing states the sales and option exercise were carried out under a Rule 10b5-1 trading plan adopted on August 7, 2025, indicating the trades were pre-arranged.

Insider Trade Summary 10b5-1

Exercise and Sale: 40,000 shares ($114K approx. pre-tax spread)

Exercise and Sale 3 txns

Insider Tachibana Aaron

Role CFO AND COO

Sold 40,000 shs ($480K)

Approx. gross sale proceeds $480K

Approx. exercise cost $366K

Approx. pre-tax spread $114K

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy)	40,000	$0.00	$0.00
Exercise	Common Stock	40,000	$9.16	$366K
Sale	Common Stock	40,000	$12.01	$480K

Holdings After Transaction: Stock Option (right to buy) — 28,832 contracts (Direct); Common Stock — 198,833 shares (Direct)

Footnotes (3)

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 price reported above reflects the weighted average price of the shares sold. The sale price ranged from $12.00 to $12.10 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.
3. F3. The shares subject to the option are fully vested and exercisable.

Key Figures

Shares sold: 40,000 shares Sale price (weighted average): $12.01/share Options exercised: 40,000 shares +4 more

7 metrics

Shares sold 40,000 shares Open-market sale of common stock on June 4, 2026

Sale price (weighted average) $12.01/share Common stock sale price range $12.00–$12.10

Options exercised 40,000 shares Stock options exercised into common stock on June 4, 2026

Option exercise price $9.16/share Strike price for exercised stock options

Shares held after transactions 198,833 shares Direct Personalis common stock holdings post-transaction

Remaining stock options 28,832 options Stock options outstanding after the reported exercise

Rule 10b5-1 plan adoption date August 7, 2025 Date the pre-arranged trading plan was adopted

Key Terms

Rule 10b5-1 trading plan, weighted average price, Stock Option (right to buy), fully vested and exercisable, +1 more

5 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.

weighted average price financial

"The price reported above reflects the weighted average price of the shares sold."

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.

Stock Option (right to buy) financial

"security_title: Stock Option (right to buy)"

fully vested and exercisable financial

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

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.

FAQ

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

What did Personalis (PSNL) CFO Aaron Tachibana report in this Form 4?

Aaron Tachibana reported an option exercise and related share sale. He exercised options for 40,000 Personalis shares at $9.16 and sold 40,000 shares at a weighted average of $12.01, all under a pre-arranged Rule 10b5-1 trading plan.

How many Personalis (PSNL) shares did the CFO sell and at what price?

He sold 40,000 Personalis common shares in an open-market transaction. The weighted average sale price was $12.01 per share, with individual sale prices ranging from $12.00 to $12.10, as disclosed in the filing footnotes.

At what price did the Personalis (PSNL) CFO exercise his stock options?

He exercised stock options covering 40,000 Personalis shares at an exercise price of $9.16 per share. These options were fully vested and exercisable, and the exercise preceded the sale of 40,000 common shares on the same date.

How many Personalis (PSNL) shares does the CFO hold after these transactions?

After the reported transactions, Aaron Tachibana directly holds 198,833 shares of Personalis common stock. The filing also shows 28,832 stock options remaining outstanding, providing additional potential equity exposure alongside his current share holdings.

Were the Personalis (PSNL) CFO’s trades made under a Rule 10b5-1 plan?

Yes. The filing states the sales and option exercise were effected under a Rule 10b5-1 trading plan adopted on August 7, 2025. Such pre-arranged plans automate trading, reducing the significance of day-to-day timing decisions by the insider.

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

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Accepted by SEC EDGAR 06/05/2026 - 08:19 PM EDT 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)
06/04/2026

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	06/04/2026		M(1)		40,000	A	$9.16	238,833	D
Common Stock	06/04/2026		S(1)		40,000	D	$12.01(2)	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)	$9.16	06/04/2026		M(1)			40,000	(3)	03/13/2029	Common Stock	40,000	$0	28,832	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 price reported above reflects the weighted average price of the shares sold. The sale price ranged from $12.00 to $12.10 per share. Upon request from the SEC staff, the Issuer, or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4.

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

	/s/ Aaron Tachibana	06/05/2026
	** 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)