Cytek Biosciences (CTKB) Institutional Ownership

$4.68 +0.06 (+1.30%)

As of 08/28/2026 04:00 PM Eastern

Current Institutional Ownership Percentage: 69.46%
Number of Institutional Buyers (last 12 months): 67
Total Institutional Inflows (last 12 months): $160.19M

Number of Institutional Sellers (last 12 months): 46
Total Institutional Outflows (last 12 months): $60.48M

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CTKB Institutional Buying and Selling by Quarter

Cytek Biosciences Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/21/2026	AXQ Capital LP	28,299	$125K	0.0%	+43.6%	0.022%
8/20/2026	Susquehanna International Group LLP	681,705	$3.02M	0.0%	+1,117.1%	0.524%
8/20/2026	Two Sigma Securities LLC	11,180	$50K	0.0%	N/A	0.009%
8/19/2026	Hsbc Holdings PLC	19,734	$86K	0.0%	N/A	0.015%
8/17/2026	Bank of America Corp DE	1,315,332	$5.83M	0.0%	N/A	1.012%
8/15/2026	Hhlr Advisors LTD.	6,657,030	$29.49M	3.5%	N/A	5.122%
8/14/2026	Hsbc Holdings PLC	19,734	$86K	0.0%	N/A	0.015%
8/14/2026	PDT Partners LLC	86,869	$385K	0.0%	N/A	0.067%
8/14/2026	Canada Pension Plan Investment Board	41,300	$183K	0.0%	N/A	0.032%
8/14/2026	Legal & General Group Plc	11,810	$52K	0.0%	N/A	0.009%
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8/14/2026	The Manufacturers Life Insurance Company	33,965	$150K	0.0%	N/A	0.026%
8/14/2026	Algert Global LLC	14,895	$66K	0.0%	-65.0%	0.011%
8/13/2026	Connor Clark & Lunn Investment Management Ltd.	266,938	$1.18M	0.0%	N/A	0.205%
8/12/2026	Quantbot Technologies LP	6,536	$29K	0.0%	N/A	0.005%
8/12/2026	Ieq Capital LLC	90,100	$399K	0.0%	N/A	0.069%
8/7/2026	BlackRock Inc.	9,578,643	$42.43M	0.0%	N/A	7.417%
8/7/2026	Pallas Capital Advisors LLC	11,269	$50K	0.0%	N/A	0.009%
8/7/2026	Deutsche Bank AG	111,932	$496K	0.0%	N/A	0.087%
8/6/2026	Bank of New York Mellon Corp	371,427	$1.65M	0.0%	N/A	0.288%
8/6/2026	GSA Capital Partners LLP	167,593	$742K	0.0%	N/A	0.130%
5/19/2026	Bank of America Corp DE	1,009,054	$4.41M	0.0%	+17.9%	0.781%
5/16/2026	The Manufacturers Life Insurance Company	32,199	$141K	0.0%	-9.6%	0.025%
5/16/2026	Quantinno Capital Management LP	51,212	$224K	0.0%	+72.7%	0.040%
5/14/2026	Arrowstreet Capital Limited Partnership	319,909	$1.40M	0.0%	-11.5%	0.248%
5/7/2026	Dimensional Fund Advisors LP	2,663,329	$11.64M	0.0%	+0.6%	2.062%
5/5/2026	Bank of New York Mellon Corp	608,647	$2.66M	0.0%	-4.6%	0.471%
5/5/2026	Illinois Municipal Retirement Fund	60,877	$266K	0.0%	N/A	0.047%
5/4/2026	Principal Financial Group Inc.	534,759	$2.34M	0.0%	-19.8%	0.414%
5/1/2026	Fifth Third Bancorp	24,909	$109K	0.0%	+2,631.3%	0.019%
4/27/2026	New York State Teachers Retirement System	44,829	$196K	0.0%	-7.5%	0.035%
4/21/2026	Louisiana State Employees Retirement System	48,800	$213K	0.0%	N/A	0.038%
4/16/2026	SG Americas Securities LLC	34,606	$151K	0.0%	-46.2%	0.027%
3/3/2026	Caitong International Asset Management Co. Ltd	5,144	$26K	0.0%	+86.6%	0.004%
2/19/2026	Invesco Ltd.	398,797	$2.01M	0.0%	+2.5%	0.312%
2/18/2026	State of Tennessee Department of Treasury	22,900	$114K	0.0%	-61.1%	0.018%
2/18/2026	XTX Topco Ltd	34,565	$175K	0.0%	-52.4%	0.027%
2/18/2026	Wellington Management Group LLP	764,279	$3.86M	0.0%	-69.9%	0.598%
2/18/2026	Numerai GP LLC	186,764	$943K	0.1%	+75.4%	0.146%
2/18/2026	Millennium Management LLC	4,752,447	$24M	0.0%	+39.0%	3.717%
2/17/2026	Brown Capital Management LLC	2,072,915	$10.47M	0.9%	-58.2%	1.621%
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2/17/2026	AQR Capital Management LLC	743,455	$3.75M	0.0%	-27.1%	0.581%
2/17/2026	Price T Rowe Associates Inc. MD	69,793	$353K	0.0%	+12.3%	0.055%
2/17/2026	Russell Investments Group Ltd.	1,001,127	$5.06M	0.0%	+527.6%	0.783%
2/17/2026	Maryland State Retirement & Pension System	15,656	$79K	0.0%	N/A	0.012%
2/17/2026	State of Wisconsin Investment Board	168,563	$851K	0.0%	-50.2%	0.132%
2/16/2026	Panagora Asset Management Inc.	51,593	$261K	0.0%	-17.6%	0.040%
2/16/2026	Mariner LLC	18,565	$94K	0.0%	-31.0%	0.015%
2/16/2026	Barclays PLC	183,239	$925K	0.0%	+10.7%	0.143%
2/13/2026	The Manufacturers Life Insurance Company	35,632	$180K	0.0%	-12.5%	0.028%
2/13/2026	Jacobs Levy Equity Management Inc.	264,177	$1.33M	0.0%	-68.0%	0.207%
2/13/2026	Public Sector Pension Investment Board	379,274	$1.92M	0.0%	-11.1%	0.297%
2/13/2026	Charles Schwab Investment Management Inc.	1,094,539	$5.53M	0.0%	-0.9%	0.856%
2/13/2026	State Street Corp	4,146,964	$20.94M	0.0%	+1.5%	3.243%
2/13/2026	Ieq Capital LLC	123,991	$626K	0.0%	-18.9%	0.097%
2/13/2026	Boston Partners	5,008,309	$25.30M	0.0%	+13,369.4%	3.917%
2/13/2026	Dynamic Technology Lab Private Ltd	44,274	$224K	0.1%	+26.1%	0.035%
2/13/2026	Wells Fargo & Company MN	132,675	$670K	0.0%	+46.8%	0.104%
2/12/2026	Jane Street Group LLC	78,758	$398K	0.0%	-77.9%	0.062%
2/12/2026	HRT Financial LP	437,653	$2.21M	0.0%	N/A	0.342%
2/12/2026	MetLife Investment Management LLC	57,758	$292K	0.0%	-17.3%	0.045%
2/12/2026	Renaissance Technologies LLC	675,000	$3.41M	0.0%	-15.2%	0.528%
2/12/2026	Dimensional Fund Advisors LP	2,646,891	$13.37M	0.0%	-17.7%	2.070%
2/12/2026	New York State Common Retirement Fund	34,922	$176K	0.0%	-89.5%	0.027%
2/11/2026	Deutsche Bank AG	93,139	$470K	0.0%	+4.6%	0.073%
2/11/2026	Cerity Partners LLC	49,528	$250K	0.0%	-4.7%	0.039%
2/11/2026	Franklin Resources Inc.	10,357	$52K	0.0%	-88.1%	0.008%
2/11/2026	Los Angeles Capital Management LLC	27,420	$138K	0.0%	N/A	0.021%
2/10/2026	Goldman Sachs Group Inc.	1,789,914	$9.04M	0.0%	+3.0%	1.400%
2/10/2026	AXQ Capital LP	19,124	$97K	0.0%	N/A	0.015%
2/10/2026	Intech Investment Management LLC	51,740	$261K	0.0%	+6.7%	0.040%
2/9/2026	Geode Capital Management LLC	2,790,574	$14.10M	0.0%	+0.3%	2.183%
2/9/2026	Royce & Associates LP	1,692,657	$8.55M	0.1%	-4.0%	1.324%
2/4/2026	Simcoe Capital LLC	298,461	$1.51M	1.4%	N/A	0.233%
2/3/2026	SBI Securities Co. Ltd.	5,010	$25K	0.0%	+99.6%	0.004%
1/30/2026	M&T Bank Corp	10,257	$52K	0.0%	N/A	0.008%
1/29/2026	Comerica Bank	23,997	$121K	0.0%	-10.4%	0.019%
1/29/2026	UBS Group AG	460,047	$2.32M	0.0%	-1.8%	0.360%
1/26/2026	CWM LLC	52,614	$266K	0.0%	-4.5%	0.041%
1/9/2026	SG Americas Securities LLC	64,287	$325K	0.0%	+7.9%	0.050%
1/1/2026	JPMorgan Chase & Co.	358,723	$1.25M	0.0%	-16.6%	0.281%
1/1/2026	Tudor Investment Corp ET AL	249,812	$867K	0.0%	N/A	0.195%
12/9/2025	Tudor Investment Corp ET AL	249,812	$867K	0.0%	N/A	0.195%
11/21/2025	CIBC Bancorp USA Inc.	12,533	$43K	0.0%	N/A	0.010%
11/17/2025	Jacobs Levy Equity Management Inc.	824,436	$2.86M	0.0%	-7.2%	0.645%
11/17/2025	Caxton Associates LLP	93,408	$324K	0.0%	-9.7%	0.073%
11/17/2025	Susquehanna International Group LLP	192,853	$669K	0.0%	-8.9%	0.151%
11/17/2025	Public Employees Retirement System of Ohio	81,106	$281K	0.0%	+17.7%	0.063%
11/17/2025	Numerai GP LLC	106,495	$370K	0.1%	-74.8%	0.083%
11/17/2025	Mercer Global Advisors Inc. ADV	21,734	$75K	0.0%	N/A	0.017%
11/17/2025	Millennium Management LLC	3,418,382	$11.86M	0.0%	+269.6%	2.673%
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11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	55,255	$192K	0.0%	-14.2%	0.043%
11/17/2025	Focus Partners Wealth	70,576	$245K	0.0%	N/A	0.055%
11/17/2025	Citadel Advisors LLC	82,304	$286K	0.0%	-86.7%	0.064%
11/17/2025	Brevan Howard Capital Management LP	47,480	$165K	0.0%	-13.9%	0.037%
11/17/2025	Bank of America Corp DE	170,160	$590K	0.0%	+85.7%	0.133%
11/17/2025	Aquatic Capital Management LLC	84,150	$292K	0.0%	+315.6%	0.066%
11/17/2025	Alliancebernstein L.P.	149,648	$519K	0.0%	-1.4%	0.117%
11/17/2025	Ameriprise Financial Inc.	328,623	$1.14M	0.0%	-20.3%	0.257%
11/14/2025	Creative Planning	108,631	$377K	0.0%	+95.1%	0.085%
11/14/2025	Two Sigma Investments LP	175,759	$610K	0.0%	N/A	0.137%

CTKB Institutional Ownership - Frequently Asked Questions

During the previous two years, 156 institutional investors and hedge funds held shares of Cytek Biosciences. The most heavily invested institutionals were BlackRock Inc. ($42.43M), Hhlr Advisors LTD. ($29.49M), Boston Partners ($25.30M), Topline Capital Management LLC ($24.10M), Vanguard Group Inc. ($24.06M), Millennium Management LLC ($24M), and State Street Corp ($20.94M).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 137 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), Hhlr Advisors LTD. ($6.66M), Boston Partners ($5.01M), Millennium Management LLC ($4.44M), Wellington Management Group LLP ($2.54M), and Bank of America Corp DE ($1.69M).

Institutional investors have bought a total of 36,941,156 shares in the last 24 months. This purchase volume represents approximately $160.19M in transactions.

Of the 46 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 ($5.04M), 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 14,036,707 shares in the last 24 months. This volume of shares sold represents approximately $60.48M 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 8/21/2026. New 13F filings are added each quarter as they're published.

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Cytek Biosciences (CTKB) Institutional Ownership

CTKB Institutional Buying and Selling by Quarter

Cytek Biosciences Major Shareholders & Ownership History

CTKB Institutional Ownership - Frequently Asked Questions

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Cytek Biosciences (CTKB) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Cytek Biosciences (NASDAQ:CTKB)

CTKB Institutional Buying and Selling by Quarter

Cytek Biosciences Major Shareholders & Ownership History

CTKB Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of CTKB shares?

What percentage of Cytek Biosciences' stock is owned by institutional investors?

Which institutional investors have been buying Cytek Biosciences' stock?

How much institutional buying is happening at Cytek Biosciences?

Which of Cytek Biosciences' major shareholders have been selling company stock?

How much institutional selling is happening at Cytek Biosciences?

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