PACIFIC BIOSCIENCES OF CALIF (PACB) Institutional Ownership Changes & 13F Activity

PACIFIC BIOSCIENCES OF CALIF (PACB) institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC 13F filings (Q1 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Renaissance Technologies LLC, ARK Invest, Polen Capital Management, Viking Global Investors, and Fairfax Financial Holdings.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Renaissance Technologies LLCSell-1,361,5002,489,100$3,285,612
Q1 2026ARK InvestSell-990,94036,273,288$47,880,740
Q4 2025ARK InvestBuy6,340,12537,264,228$69,684,106
Q4 2025Renaissance Technologies LLCBuy3,523,9783,850,600$7,200,622
Q4 2025Polen Capital ManagementBuy137,149137,149$256,469
Q3 2025ARK InvestSell-5,374,06030,924,103$39,582,852
Q2 2025ARK InvestSell-180,27836,298,163$45,009,723
Q1 2025ARK InvestBuy434,07936,478,441$43,044,561
Q4 2024ARK InvestBuy2,637,96136,044,362$65,961,183
Q3 2024ARK InvestBuy193,94733,406,401$56,790,882
Q2 2024ARK InvestSell-77,68333,212,454$45,501,063
Q1 2024ARK InvestSell-1,214,13633,290,137$124,838,014
Q4 2023ARK InvestBuy4,681,83334,504,273$338,486,921
Q3 2023ARK InvestBuy3,187,82029,822,440$249,017,370
Q3 2023Renaissance Technologies LLCBuy212,422326,622$2,727
Q2 2023ARK InvestSell-1,119,05926,634,620$354,240,443
Q1 2023ARK InvestBuy2,061,99827,753,679$321,387,603
Q4 2022ARK InvestSell-3,000,81325,691,681$210,157,951
Q3 2022ARK InvestBuy646,96428,692,494$166,560
Q2 2022ARK InvestBuy786,00928,045,530$157,896
Q2 2022Renaissance Technologies LLCSell-754,500114,200$505
Q1 2022ARK InvestBuy876,41827,259,521$248,062
Q1 2022Renaissance Technologies LLCBuy594,900868,700$7,905
Q4 2021ARK InvestBuy3,660,02826,383,103$539,798
Q3 2021ARK InvestBuy2,241,58922,723,075$580,575
Q3 2021Renaissance Technologies LLCSell-547,000273,800$6,996
Q2 2021Viking Global InvestorsBuy980,3241,273,659$44,540
Q2 2021ARK InvestSell-819,70520,481,486$716,238
Q2 2021Renaissance Technologies LLCBuy37,300820,800$28,703
Q1 2021ARK InvestSell-7,203,43821,301,191$709,543

Frequently asked questions about PACB activity

  • Which institutional owners are buying PACB?

    Institutional owners buying PACB include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in PACB activity?

    "Buy" means an investor increased their reported position in PACB compared to the prior reporting period. This reflects growing exposure to PACIFIC BIOSCIENCES OF CALIF (PACB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in PACB increasing?

    Institutional interest in PACB can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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