Cytek Biosciences Ownership | Who Owns Cytek Biosciences?

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Cytek Biosciences Ownership Summary

Cytek Biosciences is owned by 17.64% institutional investors, 8.34% insiders, and 74.02% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 13.27% of CTKB shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.22% of its assets in Cytek Biosciences shares.

CTKB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Cytek Biosciences	17.64%	8.34%	74.02%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Medical Device Stocks	35.88%	10.92%	53.20%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	17.01M	13.27%	$74.32M
Blackrock	17.07M	13.04%	$95.25M
Vanguard group	7.48M	5.86%	$37.75M
Topline capital management	7.06M	5.51%	$30.87M
Hhlr advisors	6.66M	5.19%	$29.09M
Millennium management	6.29M	4.91%	$27.50M
Boston partners	5.80M	4.53%	$25.36M
State street	4.12M	3.22%	$18.02M
Geode capital management	2.83M	2.21%	$12.39M
Dimensional fund advisors lp	2.66M	2.08%	$11.64M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Topline capital management	7.06M	5.10%	$30.87M
Hhlr advisors	6.66M	1.74%	$29.09M
Brown capital management	1.48M	0.92%	$6.47M
Centerbook partners lp	729.87K	0.17%	$3.19M
Nverses capital	38.32K	0.15%	$167.45K
Royce & associates lp	1.64M	0.07%	$7.18M
Numerai gp	112.46K	0.05%	$491.45K
Oxford asset management llp	37.51K	0.05%	$130.16K
Gsa capital partners llp	109.12K	0.03%	$477.00K
Boston partners	5.80M	0.03%	$25.36M

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	6.29M	0.01%	1.54M
Boston partners	5.80M	0.03%	794.46K
Centerbook partners lp	729.87K	0.17%	729.87K
Vanguard fiduciary trust	717.01K	0.00%	717.01K
Goldman sachs group	2.34M	0.00%	554.82K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-6.81M
Wellington management group llp	-	-	-764.28K
Brown capital management	1.48M	0.92%	-592.41K
Fil	-	-	-573.60K
Divisadero street capital management, lp	-	-	-487.55K

New Positions

Holder	Shares	% Assets	Change	Value
Centerbook partners lp	729.87K	0.17%	729.87K	$3.19M
Vanguard fiduciary trust	717.01K	0.00%	717.01K	$3.13M
Two sigma advisers, lp	61.60K	0.00%	61.60K	$213.75K
Illinois municipal retirement fund	60.88K	0.00%	60.88K	$266.03K
Vanguard global advisers	45.21K	0.00%	45.21K	$197.58K

Sold Out

Holder	Change
Capital performance advisors llp	-12.00
Mendota financial group	-13.00
Cedar mountain advisors	-21.00
Nelson, van denburg & campbell wealth management group	-24.00
Clearstead advisors	-24.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	71	-53.59%	22,534,080	-72.53%	17	0.43%	37	-49.32%	20	-66.67%
Dec 31, 2025	115	-24.34%	54,318,709	-32.13%	42	1.07%	56	-34.88%	42	-14.29%
Sep 30, 2025	144	-3.36%	78,998,321	5.14%	62	1.78%	81	-3.57%	47	4.44%
Jun 30, 2025	152	-4.40%	79,296,479	2.36%	62	1.71%	87	11.54%	45	-29.69%
Mar 31, 2025	159	5.30%	77,459,597	0.29%	60	1.74%	80	-11.11%	63	53.66%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.74M	5.22%	1.75K
Vanguard Total Stock Mkt Idx Inv	3.41M	2.64%	-
iShares Russell 2000 ETF	2.79M	2.16%	23.55K
Column Small Cap Select	2.02M	1.57%	274.37K
Vanguard Small Cap Index	1.37M	1.08%	5.04K
Vanguard Institutional Extnd Mkt Idx Tr	1.24M	0.96%	7.81K
Fidelity Small Cap Index	1.15M	0.89%	12.88K
Brown Capital Mgmt Small Co Inv	1.06M	0.82%	-767.70K
iShares Russell 2000 Value ETF	1.00M	0.78%	5.41K
Royce Micro-Cap Trust	999.30K	0.78%	-24.90K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Jun 02, 2025	McCombe William D.	Chief Financial Officer	Buy	$97.30K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	-
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	1	-

CTKB Ownership FAQ

Who Owns Cytek Biosciences?

Cytek Biosciences shareholders are primarily institutional investors at 17.64%, followed by 8.34% insiders and 74.02% retail investors. The average institutional ownership in Cytek Biosciences's industry, Medical Device Stocks, is 35.88%, which Cytek Biosciences falls below.

Who owns the most shares of Cytek Biosciences?

Cytek Biosciences’s largest shareholders are Blackrock funding, inc. /de (17.01M shares, 13.27%), Blackrock (17.07M shares, 13.04%), and Vanguard group (7.48M shares, 5.86%). Together, they hold 32.17% of Cytek Biosciences’s total shares outstanding.

Does Blackrock own Cytek Biosciences?

Yes, BlackRock owns 13.04% of Cytek Biosciences, totaling 17.07M shares as of Jun 2024. This represents 0.00% of BlackRock's total assets, with a market value of 95.25M$. In the last quarter, BlackRock decreased its holdings by -356K shares, a -2.04% change.

Who is Cytek Biosciences’s biggest shareholder by percentage of total assets invested?

Topline capital management is Cytek Biosciences’s biggest shareholder by percentage of total assets invested, with 5.10% of its assets in 7.06M Cytek Biosciences shares, valued at 30.87M$.

Who is the top mutual fund holder of Cytek Biosciences shares?

iShares Core S&P Small-Cap ETF is the top mutual fund holder of Cytek Biosciences shares, with 5.22% of its total shares outstanding invested in 6.74M Cytek Biosciences shares.

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