Cytek Biosciences Ownership | Who Owns Cytek Biosciences?

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Cytek Biosciences Ownership Summary

Cytek Biosciences is owned by 64.21% institutional investors, 8.36% insiders, and 27.43% retail investors. Blackrock is the largest institutional shareholder, holding 13.04% 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	64.21%	8.36%	27.43%
Sector	Healthcare Stocks	244.59%	12.11%	-156.70%
Industry	Medical Device Stocks	52.73%	12.62%	34.65%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	17.07M	13.04%	$95.25M
Blackrock funding, inc. /de	9.58M	7.44%	$42.43M
Millennium management	9.34M	7.26%	$41.37M
Boston partners	7.66M	5.95%	$33.94M
Vanguard group	7.48M	5.86%	$37.75M
Hhlr advisors	6.66M	5.17%	$29.49M
Topline capital management	6.28M	4.88%	$27.84M
Vanguard capital management	4.94M	3.84%	$21.88M
Geode capital management	3.06M	2.38%	$13.56M
Dimensional fund advisors lp	2.62M	2.03%	$11.59M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Topline capital management	6.28M	7.22%	$27.84M
Hhlr advisors	6.66M	3.54%	$29.49M
R squared	35.41K	0.08%	$156.88K
Royce & associates lp	2.08M	0.07%	$9.22M
Numerai gp	159.47K	0.06%	$706.43K
Oxford asset management llp	37.51K	0.05%	$130.16K
Gsa capital partners llp	167.59K	0.05%	$742.00K
Centerbook partners lp	149.18K	0.03%	$660.87K
Boston partners	7.66M	0.03%	$33.94M
Entrypoint capital	22.87K	0.02%	$101.32K

Top Buyers

Holder	Shares	% Assets	Change
Millennium management	9.34M	0.01%	3.05M
Boston partners	7.66M	0.03%	1.86M
Sixth street partners management company	1.07M	0.00%	1.07M
Acadian asset management	1.38M	0.01%	977.06K
Jane street group	906.16K	0.00%	906.16K

Top Sellers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	9.58M	0.00%	-7.43M
Ra capital management	-	-	-6.81M
State street	2.57M	0.00%	-1.56M
Brown capital management	-	-	-1.48M
Morgan stanley	701.79K	0.00%	-1.02M

New Positions

Holder	Shares	% Assets	Change	Value
Sixth street partners management company	1.07M	0.00%	1.07M	$4.75M
Qube research	689.82K	0.00%	689.82K	$3.06M
Marshall wace, llp	441.70K	0.00%	441.70K	$1.96M
Jain global	411.46K	0.01%	411.46K	$1.82M
Y-intercept (hong kong)	193.13K	0.02%	193.13K	$855.56K

Sold Out

Holder	Change
Sjs investment consulting	-6.00
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

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Jun 30, 2026	155	-6.06%	82,640,562	-2.85%	64	1.47%	74	-19.57%	64	25.49%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	6.73M	5.21%	2.92K
Vanguard Total Stock Mkt Idx Inv	3.53M	2.73%	114.60K
Vanguard Morn Total Stk Mkt Idx Investor	3.53M	2.73%	114.60K
Vanguard MStar Total Stk Mkt Idx Invest	3.53M	2.71%	-
iShares Russell 2000 ETF	3.10M	2.38%	-55.01K
Column Small Cap Select	2.61M	2.02%	589.08K
Vanguard Small Cap Index	1.37M	1.08%	5.04K
Royce Micro-Cap Trust	1.32M	1.02%	321.06K
Vanguard Institutional Extnd Mkt Idx Tr	1.30M	1.00%	3.17K
Fidelity Small Cap Index	1.17M	0.90%	4.49K

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 Q3	-	-
2026 Q2	-	-
2026 Q1	-	-
2025 Q4	-	-
2025 Q3	-	-

CTKB Ownership FAQ

Who Owns Cytek Biosciences?

Cytek Biosciences shareholders are primarily institutional investors at 64.21%, followed by 8.36% insiders and 27.43% retail investors. The average institutional ownership in Cytek Biosciences's industry, Medical Device Stocks, is 52.73%, which Cytek Biosciences exceeds.

Who owns the most shares of Cytek Biosciences?

Cytek Biosciences’s largest shareholders are Blackrock (17.07M shares, 13.04%), Blackrock funding, inc. /de (9.58M shares, 7.44%), and Millennium management (9.34M shares, 7.26%). Together, they hold 27.74% 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 7.22% of its assets in 6.28M Cytek Biosciences shares, valued at 27.84M$.

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 6.73M Cytek Biosciences shares.

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