Tax-withholding share sale by PacBio (NASDAQ: PACB) officer

Rhea-AI Filing Summary

PACIFIC BIOSCIENCES OF CALIFORNIA, INC. officer Christian O. Henry reported an open-market sale of 12,497 shares of common stock at a weighted average price of $1.514 per share, in transactions ranging from $1.49 to $1.56, to cover tax withholding on vested restricted stock units. After these tax-related sales, he directly held 3,581,813 shares of PACB common stock.

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

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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^*

HENRY CHRISTIAN O

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	See Remarks

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		S		12,497(1)	D	$1.514(2)	3,581,813	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. Represents the number of shares mandatorily sold to cover tax withholding obligations in connection with the vesting of restricted stock units.

2. This sale price represents the weighted average sale price of the shares sold ranging from $1.49 to $1.56 per share. Upon request by the Commission 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.

Remarks:

President & CEO

	/s/ Michele Farmer, Attorney-in-fact	03/04/2026
	** 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.

FAQ

What did PACB officer Christian O. Henry report in this Form 4?

Christian O. Henry reported selling 12,497 PACB common shares at a weighted average price of $1.514 each. The transactions were made to cover tax withholding on vested restricted stock units rather than as a discretionary share sale.

Why were 12,497 PACB shares sold according to the filing?

The 12,497 PACB shares were mandatorily sold to cover tax withholding obligations on vested restricted stock units. This type of sale is a common administrative transaction, ensuring taxes are paid when equity compensation vests for the reporting officer.

At what prices were the PACB shares sold in Christian O. Henry’s transaction?

The filing states a weighted average sale price of $1.514 per PACB share, with individual sale prices ranging from $1.49 to $1.56. Detailed breakdowns by exact price and share count are available upon request from the reporting person.

How many PACB shares does Christian O. Henry own after this Form 4 sale?

After the reported tax-withholding sale, Christian O. Henry directly owns 3,581,813 PACB common shares. The Form 4 indicates this post-transaction holding, showing his remaining equity stake following the mandatory sale of shares for tax purposes.

Does this PACB Form 4 indicate a discretionary insider stock sale?

The Form 4 describes the sale as mandated to cover tax withholding on restricted stock unit vesting. While coded as a sale, the footnote clarifies it was not a discretionary portfolio decision but an administrative transaction tied to equity compensation.