CERUS CORP (CERS) Institutional Ownership Changes & 13F Activity

CERUS CORP (CERS). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include ARK Invest and Renaissance Technologies LLC.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026ARK InvestBuy960,94419,161,148$34,873,289
Q1 2026Renaissance Technologies LLCBuy80,900578,900$1,053,598
Q4 2025ARK InvestSell-649,98418,200,204$37,492,420
Q4 2025Renaissance Technologies LLCSell-341,500498,000$1,025,880
Q3 2025ARK InvestSell-357,41618,850,188$29,971,799
Q3 2025Renaissance Technologies LLCBuy74,000839,500$1,334,805
Q2 2025ARK InvestSell-1,447,53819,207,604$27,082,722
Q2 2025Renaissance Technologies LLCSell-603,900765,500$1,079,355
Q1 2025Renaissance Technologies LLCBuy953,7911,369,400$1,903,466
Q1 2025ARK InvestSell-159,61020,655,142$28,710,647
Q4 2024ARK InvestBuy2,589,72120,814,752$32,054,719
Q4 2024Renaissance Technologies LLCSell-142,891415,609$640,038
Q3 2024ARK InvestSell-1,675,15318,225,031$31,711,554
Q3 2024Renaissance Technologies LLCBuy349,000558,500$971,790
Q2 2024ARK InvestSell-1,645,01219,900,184$35,024,324
Q2 2024Renaissance Technologies LLCSell-59,800209,500$368,720
Q1 2024ARK InvestBuy630,87021,545,196$40,720,421
Q1 2024Renaissance Technologies LLCSell-4,800269,300$509
Q4 2023ARK InvestBuy852,42020,914,326$45,174,943
Q4 2023Renaissance Technologies LLCSell-64,400274,100$592
Q3 2023ARK InvestSell-595,48520,061,906$32,500,288
Q3 2023Renaissance Technologies LLCSell-104,800338,500$548
Q2 2023ARK InvestSell-1,442,72820,657,391$50,817,182
Q2 2023Renaissance Technologies LLCSell-321,700443,300$1,091
Q1 2023ARK InvestBuy6,236,73522,100,119$65,637,353
Q1 2023Renaissance Technologies LLCBuy399,500765,000$2,272
Q4 2022ARK InvestSell-990,49115,863,384$57,901,352
Q4 2022Renaissance Technologies LLCBuy75,100365,500$1,334
Q3 2022ARK InvestSell-257,18716,853,875$60,674
Q3 2022Renaissance Technologies LLCBuy97,600290,400$1,045

Frequently asked questions about CERS activity

  • Which institutional owners are buying CERS?

    Institutional owners buying CERS 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 CERS activity?

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

  • Is institutional interest in CERS increasing?

    Institutional interest in CERS 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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