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Cytek Biosciences (CTKB) Institutional Ownership

Cytek Biosciences logo
$4.20 0.00 (0.00%)
Closing price 08/7/2026 04:00 PM Eastern
Extended Trading
$4.09 -0.11 (-2.52%)
As of 06:39 AM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Cytek Biosciences (NASDAQ:CTKB)

Current
Institutional Ownership
Percentage
69.46%
Number of
Institutional Buyers
(last 12 months)
67
Total
Institutional Inflows
(last 12 months)
$136.95M
Number of
Institutional Sellers
(last 12 months)
51
Total
Institutional Outflows
(last 12 months)
$64.93M
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CTKB Institutional Buying and Selling by Quarter

Cytek Biosciences Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
8/7/2026 BlackRock Inc.9,578,643$42.43M0.0%N/A7.417%
8/7/2026 Pallas Capital Advisors LLC11,269$50K0.0%N/A0.009%
8/7/2026 Deutsche Bank AG111,932$496K0.0%N/A0.087%
8/6/2026 Bank of New York Mellon Corp371,427$1.65M0.0%N/A0.288%
8/6/2026 GSA Capital Partners LLP167,593$742K0.0%N/A0.130%
5/19/2026Bank of America Corp DE1,009,054$4.41M0.0%+17.9%0.781%
5/16/2026The Manufacturers Life Insurance Company 32,199$141K0.0%-9.6%0.025%
5/16/2026Quantinno Capital Management LP51,212$224K0.0%+72.7%0.040%
5/14/2026Arrowstreet Capital Limited Partnership319,909$1.40M0.0%-11.5%0.248%
5/7/2026Dimensional Fund Advisors LP2,663,329$11.64M0.0%+0.6%2.062%
5/5/2026 Bank of New York Mellon Corp608,647$2.66M0.0%-4.6%0.471%
5/5/2026Illinois Municipal Retirement Fund60,877$266K0.0%N/A0.047%
5/4/2026 Principal Financial Group Inc.534,759$2.34M0.0%-19.8%0.414%
5/1/2026 Fifth Third Bancorp24,909$109K0.0%+2,631.3%0.019%
4/27/2026 New York State Teachers Retirement System44,829$196K0.0%-7.5%0.035%
4/21/2026 Louisiana State Employees Retirement System48,800$213K0.0%N/A0.038%
4/16/2026 SG Americas Securities LLC34,606$151K0.0%-46.2%0.027%
3/3/2026 Caitong International Asset Management Co. Ltd5,144$26K0.0%+86.6%0.004%
2/19/2026Invesco Ltd.398,797$2.01M0.0%+2.5%0.312%
2/18/2026State of Tennessee Department of Treasury22,900$114K0.0%-61.1%0.018%
2/18/2026XTX Topco Ltd34,565$175K0.0%-52.4%0.027%
2/18/2026Wellington Management Group LLP764,279$3.86M0.0%-69.9%0.598%
2/18/2026Numerai GP LLC186,764$943K0.1%+75.4%0.146%
2/18/2026Millennium Management LLC4,752,447$24M0.0%+39.0%3.717%
2/17/2026 Brown Capital Management LLC2,072,915$10.47M0.9%-58.2%1.621%
2/17/2026AQR Capital Management LLC743,455$3.75M0.0%-27.1%0.581%
2/17/2026Price T Rowe Associates Inc. MD69,793$353K0.0%+12.3%0.055%
2/17/2026 Russell Investments Group Ltd.1,001,127$5.06M0.0%+527.6%0.783%
2/17/2026 Maryland State Retirement & Pension System15,656$79K0.0%N/A0.012%
2/17/2026State of Wisconsin Investment Board168,563$851K0.0%-50.2%0.132%
2/16/2026 Panagora Asset Management Inc.51,593$261K0.0%-17.6%0.040%
2/16/2026Mariner LLC18,565$94K0.0%-31.0%0.015%
2/16/2026Barclays PLC183,239$925K0.0%+10.7%0.143%
2/13/2026The Manufacturers Life Insurance Company 35,632$180K0.0%-12.5%0.028%
2/13/2026Jacobs Levy Equity Management Inc.264,177$1.33M0.0%-68.0%0.207%
2/13/2026Public Sector Pension Investment Board379,274$1.92M0.0%-11.1%0.297%
2/13/2026Charles Schwab Investment Management Inc.1,094,539$5.53M0.0%-0.9%0.856%
2/13/2026 State Street Corp4,146,964$20.94M0.0%+1.5%3.243%
2/13/2026Ieq Capital LLC123,991$626K0.0%-18.9%0.097%
2/13/2026 Boston Partners5,008,309$25.30M0.0%+13,369.4%3.917%
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2/13/2026Dynamic Technology Lab Private Ltd44,274$224K0.1%+26.1%0.035%
2/13/2026Wells Fargo & Company MN132,675$670K0.0%+46.8%0.104%
2/12/2026Jane Street Group LLC78,758$398K0.0%-77.9%0.062%
2/12/2026HRT Financial LP437,653$2.21M0.0%N/A0.342%
2/12/2026MetLife Investment Management LLC57,758$292K0.0%-17.3%0.045%
2/12/2026Renaissance Technologies LLC675,000$3.41M0.0%-15.2%0.528%
2/12/2026Dimensional Fund Advisors LP2,646,891$13.37M0.0%-17.7%2.070%
2/12/2026 New York State Common Retirement Fund34,922$176K0.0%-89.5%0.027%
2/11/2026 Deutsche Bank AG93,139$470K0.0%+4.6%0.073%
2/11/2026Cerity Partners LLC49,528$250K0.0%-4.7%0.039%
2/11/2026Franklin Resources Inc.10,357$52K0.0%-88.1%0.008%
2/11/2026Los Angeles Capital Management LLC27,420$138K0.0%N/A0.021%
2/10/2026Goldman Sachs Group Inc.1,789,914$9.04M0.0%+3.0%1.400%
2/10/2026 AXQ Capital LP19,124$97K0.0%N/A0.015%
2/10/2026Intech Investment Management LLC51,740$261K0.0%+6.7%0.040%
2/9/2026Geode Capital Management LLC2,790,574$14.10M0.0%+0.3%2.183%
2/9/2026Royce & Associates LP1,692,657$8.55M0.1%-4.0%1.324%
2/4/2026 Simcoe Capital LLC298,461$1.51M1.4%N/A0.233%
2/3/2026 SBI Securities Co. Ltd.5,010$25K0.0%+99.6%0.004%
1/30/2026 M&T Bank Corp10,257$52K0.0%N/A0.008%
1/29/2026Comerica Bank23,997$121K0.0%-10.4%0.019%
1/29/2026UBS Group AG460,047$2.32M0.0%-1.8%0.360%
1/26/2026CWM LLC52,614$266K0.0%-4.5%0.041%
1/9/2026 SG Americas Securities LLC64,287$325K0.0%+7.9%0.050%
1/1/2026JPMorgan Chase & Co.358,723$1.25M0.0%-16.6%0.281%
1/1/2026Tudor Investment Corp ET AL249,812$867K0.0%N/A0.195%
12/9/2025Tudor Investment Corp ET AL249,812$867K0.0%N/A0.195%
11/21/2025CIBC Bancorp USA Inc.12,533$43K0.0%N/A0.010%
11/17/2025Jacobs Levy Equity Management Inc.824,436$2.86M0.0%-7.2%0.645%
11/17/2025Caxton Associates LLP93,408$324K0.0%-9.7%0.073%
11/17/2025Susquehanna International Group LLP192,853$669K0.0%-8.9%0.151%
11/17/2025Public Employees Retirement System of Ohio81,106$281K0.0%+17.7%0.063%
11/17/2025Numerai GP LLC106,495$370K0.1%-74.8%0.083%
11/17/2025Mercer Global Advisors Inc. ADV21,734$75K0.0%N/A0.017%
11/17/2025Millennium Management LLC3,418,382$11.86M0.0%+269.6%2.673%
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.55,255$192K0.0%-14.2%0.043%
11/17/2025Focus Partners Wealth70,576$245K0.0%N/A0.055%
11/17/2025Citadel Advisors LLC82,304$286K0.0%-86.7%0.064%
11/17/2025Brevan Howard Capital Management LP47,480$165K0.0%-13.9%0.037%
11/17/2025Bank of America Corp DE170,160$590K0.0%+85.7%0.133%
11/17/2025Aquatic Capital Management LLC84,150$292K0.0%+315.6%0.066%
11/17/2025Alliancebernstein L.P.149,648$519K0.0%-1.4%0.117%
11/17/2025Ameriprise Financial Inc.328,623$1.14M0.0%-20.3%0.257%
11/14/2025Creative Planning108,631$377K0.0%+95.1%0.085%
11/14/2025Two Sigma Investments LP175,759$610K0.0%N/A0.137%
11/14/2025Topline Capital Management LLC6,944,280$24.10M4.1%+32.7%5.431%
11/14/2025Squarepoint Ops LLC158,641$550K0.0%+9.4%0.124%
11/14/2025Wellington Management Group LLP2,541,046$8.82M0.0%N/A1.987%
11/14/2025Comerica Bank26,792$93K0.0%-11.9%0.021%
11/13/2025 Boston Partners37,183$129K0.0%N/A0.029%
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11/13/2025Arrowstreet Capital Limited Partnership361,290$1.25M0.0%+150.5%0.283%
11/13/2025UBS Group AG468,689$1.63M0.0%-25.8%0.367%
11/13/2025BNP Paribas Financial Markets23,816$83K0.0%+98.8%0.019%
11/13/2025Franklin Resources Inc.86,768$301K0.0%+13.3%0.068%
11/13/2025Legal & General Group Plc192,375$668K0.0%-38.0%0.150%
11/13/2025 Russell Investments Group Ltd.159,513$554K0.0%+473.9%0.125%
11/13/2025Dynamic Technology Lab Private Ltd35,119$122K0.0%-23.2%0.027%
11/12/2025Dimensional Fund Advisors LP3,217,788$11.17M0.0%-6.9%2.517%
11/12/2025Royce & Associates LP1,763,262$6.12M0.1%+26.9%1.379%
11/12/2025Quantbot Technologies LP33,907$118K0.0%+37.1%0.027%


CTKB Institutional Ownership - Frequently Asked Questions

During the previous two years, 155 institutional investors and hedge funds held shares of Cytek Biosciences. The most heavily invested institutionals were BlackRock Inc. ($42.43M), Boston Partners ($25.30M), Topline Capital Management LLC ($24.10M), Vanguard Group Inc. ($24.06M), Millennium Management LLC ($24M), State Street Corp ($20.94M), and Geode Capital Management LLC ($14.10M).Learn more on Cytek Biosciences' institutional investors.

69.46% of Cytek Biosciences' stock is owned by institutional investors. Learn more on CTKB's institutional investor holdings.

Of the 133 institutional investors that purchased Cytek Biosciences' stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: BlackRock Inc. ($9.58M), Topline Capital Management LLC ($6.94M), Millennium Management LLC ($5.36M), Boston Partners ($5.01M), Wellington Management Group LLP ($2.54M), AQR Capital Management LLC ($1.15M), and Russell Investments Group Ltd. ($1.01M).

Institutional investors have bought a total of 32,891,593 shares in the last 24 months. This purchase volume represents approximately $136.95M in transactions.

Of the 51 institutional investors that sold Cytek Biosciences' stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Brown Capital Management LLC ($5.39M), New York State Common Retirement Fund ($2.05M), Wellington Management Group LLP ($1.78M), Vanguard Group Inc. ($831.63K), Dimensional Fund Advisors LP ($807.92K), Jacobs Levy Equity Management Inc. ($624.16K), and Citadel Advisors LLC ($534.78K).

Institutional investors have sold a total of 15,355,694 shares in the last 24 months. This volume of shares sold represents approximately $64.93M in transactions.


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Institutional ownership data for NASDAQ:CTKB is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 8/7/2026. New 13F filings are added each quarter as they're published.
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