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 13F filings (Q1 2026). 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
Q3 2017ARK InvestBuy1,002,2772,683,202$7,325
Q3 2017Renaissance Technologies LLCBuy480,114560,214$1,529
Q2 2017ARK InvestBuy938,6471,680,925$4,219
Q2 2017Renaissance Technologies LLCSell-12,40080,100$201
Q1 2017ARK InvestBuy80,463742,278$3,303
Q1 2017Renaissance Technologies LLCBuy10,50092,500$412
Q4 2016ARK InvestBuy661,815661,815$2,879
Q4 2016Renaissance Technologies LLCBuy60,60082,000$357
Q2 2016Renaissance Technologies LLCBuy2,80021,400$134
Q1 2016Renaissance Technologies LLCSell-117,40018,600$110
Q1 2015Renaissance Technologies LLCBuy96,600136,000$567
Q2 2013Renaissance Technologies LLCBuy39,40039,400$174

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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