Director William W. Ericson granted 223,492 PACB options at $1.58 exercise price

Rhea-AI Filing Summary

PACIFIC BIOSCIENCES OF CALIFORNIA, INC. director William W. Ericson received a grant of stock options covering 223,492 shares of common stock. The options have an exercise price of $1.58 per share and expire on June 3, 2036. According to the grant terms, these options vest monthly over one year, or earlier on the date of the next annual stockholder meeting, provided he continues to serve as a director through each vesting date. After this award, the filing shows 223,492 option shares held directly.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Ericson William W.

Role null

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	223,492	$0.00	--

Holdings After Transaction: Stock Option (right to buy) — 223,492 shares (Direct, null)

Footnotes (1)

1. [object Object]

Key Figures

Option shares granted: 223,492 options Exercise price: $1.58 per share Underlying shares: 223,492 shares +3 more

6 metrics

Option shares granted 223,492 options Stock Option (right to buy) grant to director

Exercise price $1.58 per share Exercise price for underlying common stock

Underlying shares 223,492 shares Common stock underlying the options

Expiration date June 3, 2036 Option expiration

Shares following transaction 223,492 options Total derivative holdings from this grant after transaction

Vesting period Monthly over 1 year Subject to continued board service or earlier annual meeting

Key Terms

Stock Option (right to buy), exercise price, vesting, underlying security

4 terms

Stock Option (right to buy) financial

"security_title: Stock Option (right to buy)"

exercise price financial

"conversion_or_exercise_price: 1.5800"

The exercise price is the fixed amount at which you can buy or sell an asset, like a stock, when using an options contract. It matters because it helps determine whether exercising the option will be profitable or not, depending on the current market price. Think of it as the set price you agree on today to buy or sell later.

vesting financial

"The shares subject to the option will vest monthly over one (1) year"

Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.

underlying security financial

"underlying_security_title: Common Stock"

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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^*

Ericson William W.

(Last) (First) (Middle)

PACIFIC BIOSCIENCES OF CALIFORNIA, INC.

1305 O'BRIEN DRIVE

(Street)

MENLO PARK CALIFORNIA 94025

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
PACIFIC BIOSCIENCES OF CALIFORNIA, INC. [ PACB ]

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)
06/03/2026

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

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)	$1.58	06/03/2026		A		223,492		07/03/2026(1)	06/03/2036	Common Stock	223,492	$0	223,492	D

Explanation of Responses:

1. The shares subject to the option will vest monthly over one (1) year, on the same day of the month as the date of grant or, if earlier, on the date of the next annual meeting of the Company's stockholders occurring after the date of grant, provided such Reporting Person continues to serve as a director through the applicable vesting dates.

Remarks:

	/s/ Brett Atkins, Attorney-in-fact	06/04/2026
	** 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 did William W. Ericson report in this PACB Form 4 filing?

William W. Ericson reported receiving a stock option grant from Pacific Biosciences. The award covers 223,492 shares of common stock, giving him the right to buy those shares at a fixed exercise price if the options vest and he chooses to exercise them.

How many PACB stock options were granted to director William W. Ericson and at what price?

He was granted options on 223,492 shares of Pacific Biosciences common stock at an exercise price of $1.58 per share. This price is what he would pay for each share if he exercises the options after they vest under the grant’s terms.

What is the vesting schedule for William W. Ericson’s PACB stock option grant?

The options vest in monthly installments over one year, on the same day of each month as the grant date. Vesting may instead complete earlier on the next annual stockholder meeting date, if he continues serving as a director through the relevant vesting dates.

When do William W. Ericson’s PACB stock options expire?

The options expire on June 3, 2036, if not exercised earlier. After that expiration date, he would no longer be able to purchase Pacific Biosciences shares under this specific option grant, even if the options had fully vested before then.

Is William W. Ericson’s PACB Form 4 transaction an open-market stock purchase?

No, this Form 4 reports a stock option grant, not an open-market purchase. The company awarded him options as compensation, giving the right to buy shares at $1.58 if they vest, rather than recording him buying shares on the market.

How many PACB option shares does William W. Ericson hold after this grant?

After the reported transaction, he holds 223,492 option shares directly under this grant. These options represent potential future ownership of common stock, subject to the vesting schedule and his decision to exercise at the stated $1.58 exercise price.