Pacific Biosciences officer receives equity grants

Pacific Biosciences of California, Inc. reported that officer Michele Farmer received new equity awards.

Rhea-AI Filing Summary

Pacific Biosciences of California, Inc. reported that officer Michele Farmer received new equity awards. On February 27, 2026, Farmer was granted a stock option covering 179,670 shares of common stock at an exercise price of $0.00 per share, and an award of 89,835 shares of common stock at $0.00 per share.

The 89,835-share award is in the form of Restricted Stock Units that vest in three equal annual installments on February 15, 2027, 2028, and 2029, if Farmer continues as a service provider. The option vests in 36 equal monthly installments beginning March 27, 2026, also conditioned on continued service.

Insider Trade Summary

Grant/Award: 269,505 shares

Grant/Award 2 txns

Insider Farmer Michele

Role See Remarks

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy)	179,670	$0.00	$0.00
Grant/Award	Common Stock	89,835	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 179,670 contracts (Direct); Common Stock — 308,927 shares (Direct)

Footnotes (2)

1. F1. Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest in equal annual installments on February 15 of each of 2027, 2028, and 2029, subject to the Reporting Person's continued status as a service provider through the applicable vesting dates.
2. F2. The shares subject to the option will vest in 36 equal monthly installments beginning on March 27, 2026, subject to the Reporting Person's continued status as a service provider through the applicable vesting dates.

FAQ

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

What insider transactions did PACB report for Michele Farmer on this Form 4?

PACB reported that officer Michele Farmer acquired a stock option on 179,670 shares and an award of 89,835 shares of common stock, both at an exercise or purchase price of $0.00 per share, as equity compensation grants.

How do the new stock options for PACB’s Michele Farmer vest?

The stock option for 179,670 shares vests in 36 equal monthly installments starting on March 27, 2026. Vesting is conditioned on Michele Farmer maintaining continued status as a service provider through each applicable monthly vesting date.

What are the vesting terms of the 89,835 RSU shares granted to PACB’s Michele Farmer?

Each share in the 89,835-share grant is represented by a Restricted Stock Unit that vests in three equal annual installments on February 15, 2027, 2028, and 2029, provided Michele Farmer continues as a service provider on each vesting date.

Are the equity awards to PACB’s Michele Farmer direct or indirect holdings?

Both the 179,670-share stock option and the 89,835-share RSU-based common stock award are reported as direct holdings. The Form 4 lists the ownership code as "D" and provides no footnotes indicating indirect ownership through another entity.

What is Michele Farmer’s total PACB share ownership after these Form 4 transactions?

Following the 89,835-share common stock grant, Michele Farmer is reported as directly owning 308,927 shares of PACB common stock. This total reflects her holdings after the equity award acquisition reported on the February 27, 2026 transaction date.

Do the PACB equity awards to Michele Farmer require ongoing service to fully vest?

Yes. Both the 89,835 RSU-based shares and the 179,670-share option vest only if Michele Farmer maintains continued status as a service provider through each specified annual or monthly vesting date detailed in the Form 4 footnotes.

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

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Accepted by SEC EDGAR 03/03/2026 - 06:16 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).

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^*

Farmer Michele

(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)
02/27/2026

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	02/27/2026		A		89,835(1)	A	$0	308,927	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)	$1.68	02/27/2026		A		179,670		(2)	02/27/2036	Common Stock	179,670	$0	179,670	D

Explanation of Responses:

1. Each share is represented by a Restricted Stock Unit ("RSU"). The RSUs will vest in equal annual installments on February 15 of each of 2027, 2028, and 2029, subject to the Reporting Person's continued status as a service provider through the applicable vesting dates.

2. The shares subject to the option will vest in 36 equal monthly installments beginning on March 27, 2026, subject to the Reporting Person's continued status as a service provider through the applicable vesting dates.

Remarks:

Chief Accounting Officer

	/s/ Michele Farmer	03/03/2026
	** 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.