Cytek Biosciences Ownership | Who Owns Cytek Biosciences?

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Cytek Biosciences Ownership Summary

Cytek Biosciences is owned by 42.59% institutional investors, 9.28% insiders, and 48.14% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 13.46% of CTKB shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.21% of its assets in Cytek Biosciences shares.

CTKB Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Cytek Biosciences	42.59%	9.28%	48.14%
Sector	Healthcare Stocks	232.01%	10.74%	-142.75%
Industry	Medical Device Stocks	37.54%	10.61%	51.85%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	17.17M	13.46%	$86.72M
Blackrock	17.07M	13.04%	$95.25M
Vanguard group	7.48M	5.86%	$37.75M
Topline capital management	6.94M	5.47%	$24.10M
Hhlr advisors	6.66M	5.24%	$23.10M
Brown capital management	4.96M	3.91%	$17.20M
State street	4.08M	3.22%	$14.17M
Geode capital management	2.79M	2.19%	$14.10M
Dimensional fund advisors lp	2.65M	2.08%	$13.37M
Wellington management group llp	2.54M	2.00%	$8.82M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Topline capital management	6.94M	4.14%	$24.10M
Brown capital management	4.96M	0.71%	$17.20M
Hhlr advisors	6.66M	0.56%	$23.10M
Royce & associates lp	1.69M	0.09%	$8.55M
Numerai gp	106.50K	0.05%	$369.54K
Colony group	70.58K	0.05%	$31.15M
Oxford asset management llp	37.51K	0.05%	$130.16K
Caitong asset management	3.03K	0.04%	$15.29K
Axq capital, lp	19.12K	0.02%	$96.58K
Dynamic technology lab private	35.12K	0.02%	$122.00M

Top Buyers

Holder	Shares	% Assets	Change
Wellington management group llp	2.54M	0.00%	2.54M
Topline capital management	6.94M	4.14%	1.71M
Blackrock funding, inc. /de	17.17M	0.00%	625.34K
Millennium management	803.92K	0.00%	613.31K
Vanguard group	7.48M	0.00%	541.97K

Top Sellers

Holder	Shares	% Assets	Change
Ra capital management	-	-	-6.81M
Brown capital management	4.96M	0.71%	-2.15M
Centerbook partners lp	-	-	-845.40K
Fil	-	-	-573.60K
Dimensional fund advisors lp	2.65M	0.00%	-570.90K

New Positions

Holder	Shares	% Assets	Change	Value
Wellington management group llp	2.54M	0.00%	2.54M	$8.82M
Tudor investment corp et al	249.81K	0.00%	249.81K	$866.85K
Two sigma investments, lp	175.76K	0.00%	175.76K	$609.88K
Colony group	70.58K	0.05%	70.58K	$31.15M
Two sigma advisers, lp	61.60K	0.00%	61.60K	$213.75K

Sold Out

Holder	Change
Capital performance advisors llp	-12.00
Mendota financial group	-13.00
Nelson, van denburg & campbell wealth management group	-24.00
Quest partners	-68.00
Huntington national bank	-81.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	150	11.11%	77,235,970	3.02%	58	1.80%	89	3.49%	40	29.03%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.69M	5.21%	25.73K
Vanguard Total Stock Mkt Idx Inv	3.41M	2.65%	-
iShares Russell 2000 ETF	2.84M	2.21%	363.16K
Brown Capital Mgmt Small Co Inv	1.83M	1.42%	-176.91K
Column Small Cap Select	1.74M	1.36%	1.74M
Vanguard Small Cap Index	1.37M	1.08%	5.04K
Vanguard Institutional Extnd Mkt Idx Tr	1.20M	0.93%	5.81K
Fidelity Small Cap Index	1.20M	0.93%	-1.42K
Royce Micro-Cap Trust	1.02M	0.80%	-10.22K
State Street SPDR Port S&P 600 Sm CpETF	1.01M	0.79%	-

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 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-
2025 Q2	1	-
2025 Q1	-	-

CTKB Ownership FAQ

Who Owns Cytek Biosciences?

Cytek Biosciences shareholders are primarily institutional investors at 42.59%, followed by 9.28% insiders and 48.13% retail investors. The average institutional ownership in Cytek Biosciences's industry, Medical Device Stocks, is 37.54%, which Cytek Biosciences exceeds.

Who owns the most shares of Cytek Biosciences?

Cytek Biosciences’s largest shareholders are Blackrock funding, inc. /de (17.17M shares, 13.46%), Blackrock (17.07M shares, 13.04%), and Vanguard group (7.48M shares, 5.86%). Together, they hold 32.36% 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 4.14% of its assets in 6.94M Cytek Biosciences shares, valued at 24.1M$.

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 5.21% of its total shares outstanding invested in 6.69M Cytek Biosciences shares.

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