[Form 4] PACIFIC BIOSCIENCES OF CALIFORNIA, INC. Insider Trading Activity

Rhea-AI Filing Summary

PACIFIC BIOSCIENCES OF CALIFORNIA, INC. director Christopher Gibson reported equity awards connected to his election to the Board. On March 3, 2026, he received stock options for 73,087 shares at an exercise price of $0.00 and a grant of 53,913 shares of common stock represented by restricted stock units.

The RSUs vest in three equal annual installments on March 3, 2027, 2028, and 2029, conditioned on continued Board service. One‑third of the stock options vest on March 3, 2027, with the remaining options vesting in equal monthly installments over the following 24 months while he remains a director.

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
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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^*

Gibson Christopher

(Last) (First) (Middle)

PACIFIC BIOSCIENCES OF CALIFORNIA, INC.

1305 O'BRIEN DRIVE

(Street)

MENLO PARK CA 94025

(City) (State) (Zip)

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)

3. Date of Earliest Transaction (Month/Day/Year)
03/03/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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	03/03/2026		A		53,913(1)	A	$0	53,913	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)	$1.52	03/03/2026		A		73,087		03/03/2027(2)	03/03/2036	Common Stock	73,087	$0	73,087	D

Explanation of Responses:

1. Mr. Gibson was elected to the Board of Directors on March 3, 2026. Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest in equal annual installments on March 3rd of each of 2027, 2028, and 2029, provided such Reporting Person continues to serve as a director through the applicable vesting dates.

2. One-third of the shares subject to the option will vest on March 3, 2027, which is the one year anniversary of Mr. Gibson joining the Board, and the remainder will vest in equal monthly installments thereafter for 24 months on the same date of the month as his initial start date, provided he continues to serve as a director through each vesting date.

Remarks:

	/s/ Brett Atkins, Attorney-in-fact	03/05/2026
	** 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.

FAQ

What insider transactions did PACB director Christopher Gibson report on March 3, 2026?

Christopher Gibson reported equity awards tied to his PACB board service. He received 73,087 stock options at a $0.00 exercise price and 53,913 shares of common stock in the form of restricted stock units, all recorded as acquisitions rather than open-market purchases.

How many PACB stock options were granted to Christopher Gibson in this Form 4 filing?

Christopher Gibson was granted stock options covering 73,087 PACB shares. One-third of these options vest on March 3, 2027, with the remainder vesting in equal monthly installments over the next 24 months, contingent on his continued service as a director.

What restricted stock unit (RSU) award did PACB grant Christopher Gibson?

PACB granted Christopher Gibson 53,913 shares of common stock represented by RSUs. These RSUs vest in three equal annual installments on March 3 of 2027, 2028, and 2029, provided he continues to serve as a director through each applicable vesting date.

Are Christopher Gibson’s PACB equity awards in this filing open-market purchases?

No, the reported PACB equity awards are not open-market purchases. They are grants classified as acquisitions under transaction code “A,” consisting of stock options and RSUs awarded in connection with Christopher Gibson’s service on the company’s Board of Directors.

When do Christopher Gibson’s PACB stock options begin vesting?

Christopher Gibson’s PACB stock options begin vesting on March 3, 2027. On that date, one-third of the options vest, with the remaining two-thirds vesting in equal monthly installments over the following 24 months, assuming he continues to serve as a director.

What conditions apply to the vesting of Christopher Gibson’s PACB RSUs?

The PACB RSUs granted to Christopher Gibson vest only if he remains a director. They are scheduled to vest in equal annual installments on March 3 of 2027, 2028, and 2029, with each installment requiring continued Board service through its respective vesting date.