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 (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Millennium Management Llc, Jane Street Group, Llc, Topline Capital Management, Llc, Qube Research & Technologies Ltd, and Susquehanna International Group, Llp.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Manufacturers Life Insurance Company, TheBuy+1,766+5.5%33,965$150.47KQ2 2026Sep 09, 2026
M&T Bank CorpSell-10,308-100.0%0$0.00Q2 2026Sep 04, 2026
Citadel Advisors LlcBuy+250,078+53.1%721,470$3.20MQ2 2026Sep 02, 2026
California State Teachers Retirement SystemSell-4,715-74.1%1,647$7.30KQ2 2026Aug 24, 2026
Mercer Global Advisors IncSell-3,397-11.7%25,718$113.93KQ2 2026Aug 19, 2026
Millennium Management LlcBuy+3,046,212+48.4%9,338,010$41.37MQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+906,162906,162$4.01MQ2 2026Aug 14, 2026
Topline Capital Management, LlcSell-781,031-11.1%6,283,450$27.84MQ2 2026Aug 14, 2026
Qube Research & Technologies LtdBuy+689,821689,821$3.06MQ2 2026Aug 14, 2026
Susquehanna International Group, LlpBuy+625,695+1117.1%681,705$3.02MQ2 2026Aug 14, 2026
Hrt Financial LpBuy+583,717+141.0%997,769$4.42MQ2 2026Aug 14, 2026
Tudor Investment Corp Et AlBuy+517,198+161.3%837,913$3.71MQ2 2026Aug 14, 2026
Royce & Associates LpBuy+439,211+26.7%2,081,579$9.22MQ2 2026Aug 14, 2026
Point72 Asset Management, L.P.Buy+422,361422,361$1.87MQ2 2026Aug 14, 2026
Jain Global LlcBuy+411,465411,465$1.82MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Buy+409,057+157.3%669,182$2.96MQ2 2026Aug 14, 2026
Bank Of America CorpBuy+306,278+30.4%1,315,332$5.83MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+185,671185,671$822.52KQ2 2026Aug 14, 2026
Goldman Sachs Group IncSell-177,220-7.6%2,167,515$9.60MQ2 2026Aug 14, 2026
Legal & General Group PlcSell-171,050-93.5%11,810$52.32KQ2 2026Aug 14, 2026
Xtx Topco LtdBuy+142,723142,723$632.26KQ2 2026Aug 14, 2026
Two Sigma Investments, LpBuy+142,618+557.1%168,218$745.21KQ2 2026Aug 14, 2026
Aqr Capital Management LlcSell-98,371-10.8%813,971$3.61MQ2 2026Aug 14, 2026
Aquatic Capital Management LlcBuy+76,76276,762$340.06KQ2 2026Aug 14, 2026
Squarepoint Ops LlcBuy+57,480+227.2%82,776$366.70KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+57,427+126.8%102,704$454.98KQ2 2026Aug 14, 2026
Balyasny Asset Management L.P.Buy+54,38154,381$240.91KQ2 2026Aug 14, 2026
Numerai Gp LlcBuy+47,005+41.8%159,465$706.43KQ2 2026Aug 14, 2026
Exoduspoint Capital Management, LpBuy+36,14036,140$160.10KQ2 2026Aug 14, 2026
Prelude Capital Management, LlcBuy+32,059+242.9%45,259$200.50KQ2 2026Aug 14, 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.