Cytek Biosciences, Inc. (CTKB) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

128,200,000Shares Outstanding

473,180Shares held by institutions

$2,006,283Value of institutional holdings

42.34%Institutional ownership %

10.72%Shares Changed QoQ

114No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Recent 13F filings as of December 2025 show that 114 institutional investors hold a position in Cytek Biosciences, Inc. (NASDAQ:CTKB).

Cytek Biosciences saw its institutional ownership percentage fell to 42.3% in December 2025 from 62.4% in September 2025.
Institutional share ownership changed by 10.72% QoQ, while the number of institutional owners saw a decrease of 25.00% YoY.
Among the 114 institutional holders of Cytek Biosciences, 55 added to their stakes while 41 trimmed their positions and 18 held steady.
This class of investors increased its holdings in Cytek Biosciences to 54.28Mn shares for the 13F-cycle ending December 2025, up by 5.25Mn shares quarter on quarter, and down 22.89Mn shares year over year.
As of December 31, 2025, BlackRock, Inc. held Cytek Biosciences's largest shareholding position with over 17.17Mn shares, representing 13.40% of total outstanding shares.
Among the most significant buyers of Cytek Biosciences during December 2025 were Boston Partners (4.97Mn), BlackRock, Inc. (625.34K), VANGUARD GROUP INC (541.97K), HRT FINANCIAL LP (437.65K), Simcoe Capital LLC (298.46K).
Leading sellers of Cytek Biosciences stock in December 2025 included DIMENSIONAL FUND ADVISORS LP (570.90K), JACOBS LEVY EQUITY MANAGEMENT, INC (560.26K), NEW YORK STATE COMMON RETIREMENT FUND (296.27K), JANE STREET GROUP, LLC (278.27K), RENAISSANCE TECHNOLOGIES LLC (120.54K).
The top 10 institutional holders of Cytek Biosciences for the quarter ending December 2025 included BlackRock, Inc. (17.17Mn), VANGUARD GROUP INC (7.48Mn), Boston Partners (5.01Mn), STATE STREET CORP (4.15Mn), GEODE CAPITAL MANAGEMENT, LLC (2.79Mn), DIMENSIONAL FUND ADVISORS LP (2.65Mn), GOLDMAN SACHS GROUP INC (1.79Mn), MORGAN STANLEY (1.70Mn), ROYCE & ASSOCIATES LP (1.69Mn), CHARLES SCHWAB INVESTMENT MANAGEMENT INC (1.09Mn).

114 Institutional Holders

473,180 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
Boston Partners	31 Dec, 2025	5,008,309	4,971,126	13,369.35%	$25,297,227.00
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
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
RENAISSANCE TECHNOLOGIES LLC	31 Dec, 2025	675,000	-120,544	-15.15%	$3,408,750.00
ACADIAN ASSET MANAGEMENT LLC	31 Dec, 2025	674,475	108,902	19.26%	$3,402.00
PRINCIPAL FINANCIAL GROUP INC	31 Dec, 2025	666,927	43,621	7.00%	$3,367,982.00
Bank of New York Mellon Corp	31 Dec, 2025	637,929	-35,640	-5.29%	$3,221,542.00
UBS Group AG	31 Dec, 2025	460,047	-8,642	-1.84%	$2,323,238.00
HRT FINANCIAL LP	31 Dec, 2025	437,653	437,653	0.00%	$2,210.00
PUBLIC SECTOR PENSION INVESTMENT BOARD	31 Dec, 2025	379,274	-47,532	-11.14%	$1,915,334.00
ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	31 Dec, 2025	361,677	387	0.11%	$1,826,469.00
JPMORGAN CHASE & CO	31 Dec, 2025	328,853	-29,870	-8.33%	$1,660,708.00
Simcoe Capital LLC	31 Dec, 2025	298,461	298,461	0.00%	$1,507,228.00

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