CYTEK BIOSCIENCES INC (CTKB) Institutional Ownership Changes & 13F Activity

CYTEK BIOSCIENCES INC (CTKB). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Topline Capital Management, Llc, Hhlr Advisors, Ltd., Millennium Management Llc, Brown Capital Management Llc, and Russell Investments Group, Ltd..

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
State Of Tennessee, Department Of TreasuryBuy+22,900—22,900$114.50KQ4 2025Feb 18, 2026
Mercer Global Advisors IncBuy+21,726—21,726$109.72KQ4 2025Feb 18, 2026
Topline Capital Management, LlcBuy+7,442,466—7,442,466$37.58MQ4 2025Feb 17, 2026
Hhlr Advisors, Ltd.Buy+6,657,030—6,657,030$33.62MQ4 2025Feb 17, 2026
Millennium Management LlcBuy+4,752,447—4,752,447$24.00MQ4 2025Feb 17, 2026
Brown Capital Management LlcBuy+2,072,915—2,072,915$10.47MQ4 2025Feb 17, 2026
Russell Investments Group, Ltd.Buy+1,001,127—1,001,127$5.06MQ4 2025Feb 17, 2026
Northern Trust CorpBuy+957,594—957,594$4.84MQ4 2025Feb 17, 2026
Bank Of America CorpBuy+856,161—856,161$4.32MQ4 2025Feb 17, 2026
Wellington Management Group LlpBuy+764,279—764,279$3.86MQ4 2025Feb 17, 2026
Aqr Capital Management LlcBuy+743,455—743,455$3.75MQ4 2025Feb 17, 2026
D. E. Shaw & Co., Inc.Buy+263,126—263,126$1.33MQ4 2025Feb 17, 2026
Fmr LlcBuy+234,072—234,072$1.18MQ4 2025Feb 17, 2026
Ameriprise Financial IncBuy+202,316—202,316$1.02MQ4 2025Feb 17, 2026
Numerai Gp LlcBuy+186,764—186,764$943.16KQ4 2025Feb 17, 2026
State Of Wisconsin Investment BoardBuy+168,563—168,563$851.24KQ4 2025Feb 17, 2026
Citadel Advisors LlcBuy+166,754—166,754$842.11KQ4 2025Feb 17, 2026
Alliancebernstein L.P.Buy+141,048—141,048$712.29KQ4 2025Feb 17, 2026
Creative PlanningBuy+121,209—121,209$612.11KQ4 2025Feb 17, 2026
Point72 Asset Management, L.P.Buy+114,256—114,256$576.99KQ4 2025Feb 17, 2026
Pdt Partners, LlcBuy+91,869—91,869$463.94KQ4 2025Feb 17, 2026
Price T Rowe Associates IncBuy+69,793—69,793$353.00KQ4 2025Feb 17, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+54,611—54,611$275.79KQ4 2025Feb 17, 2026
Susquehanna International Group, LlpBuy+48,103—48,103$242.92KQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+34,565—34,565$174.55KQ4 2025Feb 17, 2026
Two Sigma Investments, LpBuy+30,032—30,032$151.66KQ4 2025Feb 17, 2026
Quantinno Capital Management LpBuy+29,648—29,648$149.72KQ4 2025Feb 17, 2026
Maryland State Retirement & Pension SystemBuy+15,656—15,656$79.06KQ4 2025Feb 17, 2026
Captrust Financial AdvisorsBuy+14,047—14,047$70.94KQ4 2025Feb 17, 2026
Prelude Capital Management, LlcBuy+13,400—13,400$67.67KQ4 2025Feb 17, 2026
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Frequently asked questions about CTKB activity

  • Which institutional owners are buying CTKB?

    Institutional owners buying CTKB 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 CTKB activity?

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

  • Is institutional interest in CTKB increasing?

    Institutional interest in CTKB 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.