# EDGAR Filing Document

**Accession Number:** 0001503381
**File Stem:** 0001299130-25-000134
**Filing Date:** 2025-6
**Character Count:** 8343
**Document Hash:** 3b1addf80b12059e234eb5c000136000
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001299130-25-000134.hdr.sgml**: 20250606

**ACCESSION NUMBER**: 0001299130-25-000134

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250604

**FILED AS OF DATE**: 20250606

**DATE AS OF CHANGE**: 20250606

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Ericson William W.
- **CENTRAL INDEX KEY:** 0001503381

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34899
- **FILM NUMBER:** 251030666

**MAIL ADDRESS:**
- **STREET 1:** 777 MARINERS ISLAND BOULEVARD
- **STREET 2:** SUITE 550
- **CITY:** SAN MATEO
- **STATE:** CA
- **ZIP:** 94404
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PACIFIC BIOSCIENCES OF CALIFORNIA, INC.
- **CENTRAL INDEX KEY:** 0001299130
- **STANDARD INDUSTRIAL CLASSIFICATION:** LABORATORY ANALYTICAL INSTRUMENTS [3826]
- **ORGANIZATION NAME:** 08 Industrial Applications and Services
- **EIN:** 161590339
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 1305 O'BRIEN DRIVE
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025
- **BUSINESS PHONE:** 650-521-8000

**MAIL ADDRESS:**
- **STREET 1:** 1305 O'BRIEN DRIVE
- **CITY:** MENLO PARK
- **STATE:** CA
- **ZIP:** 94025

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PACIFIC BIOSCIENCES OF CALIFORNIA INC
- **DATE OF NAME CHANGE:** 20050829

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NANOFLUIDICS INC
- **DATE OF NAME CHANGE:** 20040729

## Ex-24

```

POWER OF ATTORNEY

The undersigned, as a Section 16 reporting person of Pacific
Biosciences of California, Inc. (the "Company"), hereby constitutes
and appoints Brett Atkins, William Morrison, Jim Gibson, Michele
Farmer, Todd Friedman, Andrew Hoffman, Zachary Myers, and
Christoph Luschin, and each of them, the undersigned's true and
lawful attorney-in-fact to:

1. complete and execute Forms 3, 4 and 5 and other forms and all
amendments thereto as such attorney-in-fact shall in his or her
discretion determine to be required or advisable pursuant to
Section 16 of the Securities Exchange Act of 1934 (as amended) and
the rules and regulations promulgated thereunder, or any successor
laws and regulations, as a consequence of the undersigned's
ownership, acquisition or disposition of securities of the Company;
and

2. do all acts necessary in order to file such forms with the U.S.
Securities and Exchange Commission, any securities exchange or
national association, the Company and such other person or agency
as the attorney-in-fact shall deem appropriate.

The undersigned hereby ratifies and confirms all that said
attorneys-in-fact and agents shall do or cause to be done by virtue
hereof. The undersigned acknowledges that the foregoing attorneys-
in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of
the undersigned's responsibilities to comply with Section 16 of the
Securities Exchange Act of 1934 (as amended).

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4 and 5 with
respect to the undersigned's holdings of and transactions in
securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the Company and the
foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of June 4, 2025.

Signature: /s/ William Ericson

Name: William Ericson

```

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 4

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] 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**<sup>*</sup><br>Ericson William W.<br><sub>(Last) (First) (Middle)</sub><br>PACIFIC BIOSCIENCES OF CALIFORNIA, INC.<br>1305 O'BRIEN DRIVE<br><sub>(Street)</sub><br>MENLO PARK, CA 94025<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-06-04 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[X] Director [ ] 10% Owner<br>[ ] Officer (give title below) [ ] Other (specify below)<br>_ _ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>PACIFIC BIOSCIENCES OF CALIFORNIA, INC. [ PACB ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| Stock Option (right to buy) | $1.03 | 2025-06-04 |  | A |  | 65000 |  | 2025-07-04<sup>(1)</sup> | 2035-06-04 | Common Stock | 65000 | $0 | 65000 | D |  |

---

### Footnotes:

(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:**
Exhibit List: Exhibit 24 - Power Of Attorney

**Signature:** /s/ Michele Farmer, Attorney-in-fact  
**Date:** 2025-06-06

### Remarks:

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.**