ARK reports 9.59% stake in Pacific Biosciences (PACB)

Rhea-AI Filing Summary

ARK Investment Management LLC and Catherine D. Wood report beneficial ownership of 29,781,416 shares of Pacific Biosciences of California, Inc. common stock, representing 9.59% of the class. ARK has sole voting power over 27,781,961 shares and sole dispositive power over 29,781,416 shares, while Catherine D. Wood reports shared voting and dispositive power over these holdings.

Key Figures

Beneficial ownership: 29,781,416 shares Percent of class owned: 9.59% ARK sole voting power: 27,781,961 shares +4 more

7 metrics

Beneficial ownership 29,781,416 shares Total PACB common shares beneficially owned by ARK and Catherine D. Wood

Percent of class owned 9.59% Portion of Pacific Biosciences common stock class beneficially owned

ARK sole voting power 27,781,961 shares Shares for which ARK has sole power to vote or direct the vote

ARK shared voting power 327,377 shares Shares for which ARK has shared power to vote or direct the vote

ARK sole dispositive power 29,781,416 shares Shares for which ARK has sole power to dispose or direct disposition

Catherine Wood shared voting power 28,109,338 shares Shares for which Catherine D. Wood has shared power to vote

Catherine Wood shared dispositive power 29,781,416 shares Shares for which Catherine D. Wood has shared power to dispose

Key Terms

beneficially owned, sole voting power, shared voting power, sole dispositive power, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: ARK and Catherine D. Wood"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Number of shares as to which the person has | (i) Sole power to vote"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared voting power financial

"(ii) Shared power to vote or to direct the vote"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

sole dispositive power financial

"(iii) Sole power to dispose or to direct the disposition of"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

shared dispositive power financial

"(iv) Shared power to dispose or to direct the disposition of"

FAQ

What percentage of PACB does ARK Investment Management currently own?

ARK Investment Management LLC and Catherine D. Wood report beneficial ownership of 9.59% of Pacific Biosciences (PACB) common stock, representing 29,781,416 shares as disclosed in this Schedule 13G/A amendment.

How many PACB shares are beneficially owned by ARK and Catherine Wood?

ARK Investment Management LLC and Catherine D. Wood beneficially own 29,781,416 shares of Pacific Biosciences (PACB) common stock, corresponding to 9.59% of the class, according to the ownership details provided.

What voting power does ARK have over PACB shares?

ARK has sole voting power over 27,781,961 shares of Pacific Biosciences (PACB) and shared voting power over 327,377 shares, reflecting how ARK can direct the vote on most of the reported holdings.

What voting and dispositive power does Catherine D. Wood report over PACB?

Catherine D. Wood reports shared voting power over 28,109,338 shares and shared dispositive power over 29,781,416 shares of Pacific Biosciences (PACB), aligned with ARK’s managed holdings.

Who are the reporting persons on this PACB Schedule 13G/A filing?

The reporting persons are ARK Investment Management LLC and Catherine D. Wood, each reporting beneficial ownership of 29,781,416 PACB shares, or 9.59% of the common stock, with differing sole and shared powers.

What type of security in PACB is reported as owned by ARK and Catherine Wood?

The reported security is common stock of Pacific Biosciences of California, Inc. (PACB), identified by CUSIP 69404D108, with 29,781,416 shares beneficially owned by ARK and Catherine D. Wood.

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

See more from StockTitan in Google Search and AI answers. Adds StockTitan as a preferred source · opens Google

Add on Google Not now

Available on EDGAR 08/14/2026 - 02:53 PM Accepted by SEC EDGAR 08/14/2026 - 02:52 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 7)

Pacific Biosciences of California, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

69404D108

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 69404D108

1

Names of Reporting Persons

ARK Investment Management LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 27,781,961.00
6	Shared Voting Power 327,377.00
7	Sole Dispositive Power 29,781,416.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

29,781,416.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.59 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 69404D108

1

Names of Reporting Persons

Catherine D. Wood

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 28,109,338.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 29,781,416.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

29,781,416.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

9.59 %

12

Type of Reporting Person (See Instructions)

HC, IN

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Pacific Biosciences of California, Inc.
(b)	Address of issuer's principal executive offices: 1305 O'Brien Drive, Menlo Park, CA 94025
Item 2.
(a)	Name of person filing: (i) ARK Investment Management LLC ("ARK") (ii) Catherine D. Wood
(b)	Address or principal business office or, if none, residence: ARK and Catherine D. Wood: 200 Central Avenue, St. Petersburg, FL 33701
(c)	Citizenship: (i) ARK: Delaware (ii) Catherine D. Wood: United States
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 69404D108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: ARK and Catherine D. Wood: 29,781,416
(b)	Percent of class: ARK and Catherine D. Wood: 9.59
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: (i) ARK: 27,781,961 (ii) Catherine D. Wood: 0
	(ii) Shared power to vote or to direct the vote: (i) ARK: 327,377 (ii) Catherine D. Wood: 28,109,338
	(iii) Sole power to dispose or to direct the disposition of: (i) ARK: 29,781,416 (ii) Catherine D. Wood: 0
	(iv) Shared power to dispose or to direct the disposition of: (i) ARK: 0 (ii) Catherine D. Wood: 29,781,416
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

ARK Investment Management LLC

Signature:	/s/ Kellen Carter
Name/Title:	Kellen Carter, Chief Compliance Officer
Date:	08/14/2026

Catherine D. Wood

Signature:	/s/ Catherine D. Wood
Name/Title:	Catherine D. Wood, Chief Executive Officer, Chief Investment Officer
Date:	08/14/2026