Cytek Biosciences, Inc. (CTKB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

128,200,000Shares Outstanding

7,222,333Shares held by institutions

$30,333,799Value of institutional holdings

63.55%Institutional ownership %

4.26%Shares Changed QoQ

148No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

The institutional landscape for Cytek Biosciences, Inc. (NASDAQ:CTKB) includes 148 filers as of the latest reporting cycle ending December 2025.

The collective stake of institutional investors in Cytek Biosciences moved to 63.6% in December 2025, a shift up from the 62.4% reported for September 2025.
Institutional share ownership changed by 4.26% QoQ, while the number of institutional owners saw a decrease of 2.63% YoY.
Among the 148 institutional holders of Cytek Biosciences, 71 added to their stakes while 56 trimmed their positions and 21 held steady.
The total number of shares held by institutions in Cytek Biosciences increased to 81.48Mn as of December 2025, a net change of up by 3.33Mn shares quarter on quarter, and up 4.31Mn shares year over year.
BlackRock, Inc. continues to be the largest institutional holder of Cytek Biosciences as of December 31, 2025, with a position of 17.17Mn shares, representing 13.40% of the company's outstanding stock.
Among the most significant buyers of Cytek Biosciences during December 2025 were Boston Partners (4.97Mn), MILLENNIUM MANAGEMENT LLC (1.33Mn), Russell Investments Group, Ltd. (841.61K), BANK OF AMERICA CORP /DE/ (686.00K), BlackRock, Inc. (625.34K).
Leading sellers of Cytek Biosciences stock in December 2025 included BROWN CAPITAL MANAGEMENT LLC (2.89Mn), WELLINGTON MANAGEMENT GROUP LLP (1.78Mn), DIMENSIONAL FUND ADVISORS LP (570.90K), JACOBS LEVY EQUITY MANAGEMENT, INC (560.26K), NEW YORK STATE COMMON RETIREMENT FUND (296.27K).
The top 10 institutional holders of Cytek Biosciences for the quarter ending December 2025 included BlackRock, Inc. (17.17Mn), VANGUARD GROUP INC (7.48Mn), Topline Capital Management, LLC (7.44Mn), HHLR ADVISORS, LTD. (6.66Mn), Boston Partners (5.01Mn), MILLENNIUM MANAGEMENT LLC (4.75Mn), STATE STREET CORP (4.15Mn), GEODE CAPITAL MANAGEMENT, LLC (2.79Mn), DIMENSIONAL FUND ADVISORS LP (2.65Mn), BROWN CAPITAL MANAGEMENT LLC (2.07Mn).

148 Institutional Holders

7,222,333 Total Shares Held

Rows:

Download Data

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
BlackRock, Inc.	31 Dec, 2025	17,173,028	625,335	3.78%	$86,723,792.00
VANGUARD GROUP INC	31 Dec, 2025	7,475,477	541,973	7.82%	$37,751,160.00
Topline Capital Management, LLC	31 Dec, 2025	7,442,466	498,186	7.17%	$37,584,453.00
HHLR ADVISORS, LTD.	31 Dec, 2025	6,657,030	0	0.00%	$33,618,002.00
Boston Partners	31 Dec, 2025	5,008,309	4,971,126	13,369.35%	$25,297,227.00
MILLENNIUM MANAGEMENT LLC	31 Dec, 2025	4,752,447	1,334,065	39.03%	$23,999,857.00
STATE STREET CORP	31 Dec, 2025	4,146,964	62,596	1.53%	$20,942,168.00
GEODE CAPITAL MANAGEMENT, LLC	31 Dec, 2025	2,790,574	7,125	0.26%	$14,095,696.00
DIMENSIONAL FUND ADVISORS LP	31 Dec, 2025	2,646,891	-570,897	-17.74%	$13,366,732.00
BROWN CAPITAL MANAGEMENT LLC	31 Dec, 2025	2,072,915	-2,885,101	-58.19%	$10,468,221.00
GOLDMAN SACHS GROUP INC	31 Dec, 2025	1,789,914	52,605	3.03%	$9,039,066.00
MORGAN STANLEY	31 Dec, 2025	1,700,985	237,844	16.26%	$8,589,975.00
ROYCE & ASSOCIATES LP	31 Dec, 2025	1,692,657	-70,605	-4.00%	$8,547,918.00
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	31 Dec, 2025	1,094,539	-10,482	-0.95%	$5,527,422.00
Russell Investments Group, Ltd.	31 Dec, 2025	1,001,127	841,614	527.61%	$5,055,684.00
NORTHERN TRUST CORP	31 Dec, 2025	957,594	-55,989	-5.52%	$4,835,850.00
BANK OF AMERICA CORP /DE/	31 Dec, 2025	856,161	686,001	403.15%	$4,323,612.00
WELLINGTON MANAGEMENT GROUP LLP	31 Dec, 2025	764,279	-1,776,767	-69.92%	$3,859,609.00
AQR CAPITAL MANAGEMENT LLC	31 Dec, 2025	743,455	-276,435	-27.10%	$3,754,447.00
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	675,000	-120,544	-15.15%	$3,408,750.00

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