Institutional HoldersBeta

Who holds a company, from every 13F filed for the quarter, one row per filer exactly as filed, against the latest share count the company reported.

Cytek Biosciences, Inc.

CIK 0001831915CTKB· quarter ending 2026-06-30

Shares outstanding

129,983,253

as of 2026-07-31 · 10-Q cover page, filed 2026-08-05

Held by 13F filers

81,517,414

62.7% of shares outstanding

Holders

154

-11 vs 2026-03-31 · 28 new, 39 exited

Value

$361.0M

shares -4.2% vs prior quarter

Share classes (cover page of the 10-Q filed 2026-08-05, as of 2026-07-31)

Class	Listed	Shares outstanding	Held by 13F filers	% of class	Holders	CUSIP
Common stock	CTKB · NASDAQ	129,983,253	81,517,414	62.7%	154	23285D109

Each class is compared with its own share count; classes are not added together. A class that is not exchange-listed cannot be held by 13F filers.

Securities (CUSIPs held in 13F this quarter)

tick to combine

Count	CUSIP	Class (as filers write it)	Holders	Shares held	Class shares	% of class	Value	Options	Mapped via
	23285D109	COM	154	81,517,414	129,983,253	62.7%	$361.0M	—	13DG	holders →

Totals combine the ticked CUSIPs and update as you tick: common-stock classes by default; preferreds, notes, warrants and depositary shares are listed but not counted. "holders →" shows a single CUSIP on its own. Bonds are held as a principal amount, not shares. Options positions are never counted as holdings.

Top holders (154 of 154 · 23285D109)

change vs 2026-03-31

#	Filer	Shares	% of class	Value	Change
1	BlackRock, Inc.	9,578,643	7.37%	$42.4M	-7,428,626 (-43.7%)
2	MILLENNIUM MANAGEMENT LLC	9,338,010	7.18%	$41.4M	+3,046,212 (+48.4%)
3	Boston Partners	7,660,943	5.89%	$33.9M	+1,858,170 (+32.0%)
4	HHLR ADVISORS, LTD.	6,657,030	5.12%	$29.5M	—
5	Topline Capital Management, LLC	6,283,450	4.83%	$27.8M	-781,031 (-11.1%)
6	VANGUARD CAPITAL MANAGEMENT LLC	4,939,597	3.80%	$21.9M	+176,693 (+3.7%)
7	GEODE CAPITAL MANAGEMENT, LLC	3,059,573	2.35%	$13.6M	+225,618 (+8.0%)
8	DIMENSIONAL FUND ADVISORS LP	2,616,257	2.01%	$11.6M	-47,072 (-1.8%)
9	STATE STREET CORP	2,566,121	1.97%	$11.4M	-1,557,627 (-37.8%)
10	GOLDMAN SACHS GROUP INC	2,167,515	1.67%	$9.6M	-177,220 (-7.6%)
11	ROYCE & ASSOCIATES LP	2,081,579	1.60%	$9.2M	+439,211 (+26.7%)
12	Russell Investments Group, Ltd.	1,511,315	1.16%	$6.7M	+151,415 (+11.1%)
13	ACADIAN ASSET MANAGEMENT LLC	1,376,048	1.06%	$6.1M	+977,060 (+244.9%)
14	BANK OF AMERICA CORP /DE/	1,315,332	1.01%	$5.8M	+306,278 (+30.4%)
15	VANGUARD PORTFOLIO MANAGEMENT LLC	1,141,592	0.88%	$5.1M	-1,170,266 (-50.6%)
16	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	1,073,253	0.83%	$4.8M	-31,348 (-2.8%)
17	NORTHERN TRUST CORP	1,003,294	0.77%	$4.4M	-1,899 (-0.2%)
18	HRT FINANCIAL LP	997,769	0.77%	$4.4M	+583,717 (+141.0%)
19	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	973,833	0.75%	$4.3M	+653,924 (+204.4%)
20	JANE STREET GROUP, LLC	906,162	0.70%	$4.0M	NEW
21	TUDOR INVESTMENT CORP ET AL	837,913	0.64%	$3.7M	+517,198 (+161.3%)
22	AQR CAPITAL MANAGEMENT LLC	813,971	0.63%	$3.6M	-98,371 (-10.8%)
23	VANGUARD FIDUCIARY TRUST CO	740,662	0.57%	$3.3M	+23,651 (+3.3%)
24	CITADEL ADVISORS LLC	721,470	0.56%	$3.2M	+250,078 (+53.1%)
25	MORGAN STANLEY	701,792	0.54%	$3.1M	-1,017,083 (-59.2%)
26	Qube Research & Technologies Ltd	689,821	0.53%	$3.1M	NEW
27	SUSQUEHANNA INTERNATIONAL GROUP, LLP	681,705	0.52%	$3.0M	+625,695 (+1117.1%)
28	D. E. Shaw & Co., Inc.	669,182	0.51%	$3.0M	+409,057 (+157.3%)
29	RENAISSANCE TECHNOLOGIES LLC	661,300	0.51%	$2.9M	-15,400 (-2.3%)
30	FMR LLC	504,385	0.39%	$2.2M	+220,999 (+78.0%)
31	MARSHALL WACE, LLP	441,704	0.34%	$2.0M	NEW
32	Point72 Asset Management, L.P.	422,361	0.32%	$1.9M	NEW
33	Jain Global LLC	411,465	0.32%	$1.8M	NEW
34	Bank of New York Mellon Corp	371,427	0.29%	$1.6M	-237,220 (-39.0%)
35	AMERICAN CENTURY COMPANIES INC	292,103	0.22%	$1.3M	+10,422 (+3.7%)
36	Nuveen, LLC	289,415	0.22%	$1.3M	+43,894 (+17.9%)
37	Connor, Clark & Lunn Investment Management Ltd.	266,938	0.21%	$1.2M	+25,434 (+10.5%)
38	JACOBS LEVY EQUITY MANAGEMENT, INC	241,581	0.19%	$1.1M	-15,711 (-6.1%)
39	BNP PARIBAS FINANCIAL MARKETS	215,010	0.17%	$952K	+136,966 (+175.5%)
40	Y-Intercept (Hong Kong) Ltd	193,128	0.15%	$856K	NEW
41	Invesco Ltd.	185,671	0.14%	$823K	-202,562 (-52.2%)
42	TWO SIGMA INVESTMENTS, LP	168,218	0.13%	$745K	+142,618 (+557.1%)
43	GSA CAPITAL PARTNERS LLP	167,593	0.13%	$742K	+58,477 (+53.6%)
44	Numerai GP LLC	159,465	0.12%	$706K	+47,005 (+41.8%)
45	FRANKLIN RESOURCES INC	156,061	0.12%	$691K	+42,088 (+36.9%)
46	RHUMBLINE ADVISERS	153,225	0.12%	$679K	-101,364 (-39.8%)
47	CenterBook Partners LP	149,180	0.11%	$661K	-580,694 (-79.6%)
48	Jump Financial, LLC	148,083	0.11%	$656K	+119,191 (+412.5%)
49	XTX Topco Ltd	142,723	0.11%	$632K	NEW
50	JPMORGAN CHASE & CO	141,864	0.11%	$616K	-157,226 (-52.6%)
51	ALLIANCEBERNSTEIN L.P.	141,048	0.11%	$616K	—
52	DEUTSCHE BANK AG\	111,932	0.09%	$496K	+7,495 (+7.2%)
53	WELLS FARGO & COMPANY/MN	102,704	0.08%	$455K	+57,427 (+126.8%)
54	PRICE T ROWE ASSOCIATES INC /MD/	101,198	0.08%	$449K	+21,056 (+26.3%)
55	IEQ CAPITAL, LLC	90,100	0.07%	$399K	-54,292 (-37.6%)
56	UBS Group AG	88,914	0.07%	$394K	-97,967 (-52.4%)
57	PDT Partners, LLC	86,869	0.07%	$385K	—
58	Squarepoint Ops LLC	82,776	0.06%	$367K	+57,480 (+227.2%)
59	Aquatic Capital Management LLC	76,762	0.06%	$340K	NEW
60	VOYA INVESTMENT MANAGEMENT LLC	74,034	0.06%	$328K	-67,351 (-47.6%)
61	MetLife Investment Management, LLC	68,692	0.05%	$304K	+4,175 (+6.5%)
62	Creative Planning	62,555	0.05%	$277K	-27,382 (-30.4%)
63	Catalyst Funds Management Pty Ltd	62,500	0.05%	$277K	NEW
64	LOS ANGELES CAPITAL MANAGEMENT LLC	62,160	0.05%	$275K	NEW
65	WEALTH ENHANCEMENT ADVISORY SERVICES, LLC	61,873	0.05%	$222K	-10,827 (-14.9%)
66	Quantinno Capital Management LP	56,823	0.04%	$252K	+5,611 (+11.0%)
67	CITIGROUP INC	56,130	0.04%	$249K	+43,676 (+350.7%)
68	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	56,017	0.04%	$248K	+872 (+1.6%)
69	Balyasny Asset Management L.P.	54,381	0.04%	$241K	NEW
70	PRELUDE CAPITAL MANAGEMENT, LLC	45,259	0.03%	$200K	+32,059 (+242.9%)
71	Vanguard Global Advisers, LLC	45,212	0.03%	$200K	—
72	CANADA PENSION PLAN INVESTMENT BOARD	41,300	0.03%	$183K	—
73	Police & Firemen's Retirement System of New Jersey	39,936	0.03%	$177K	+10,467 (+35.5%)
74	Campbell & CO Investment Adviser LLC	39,333	0.03%	$174K	NEW
75	ExodusPoint Capital Management, LP	36,140	0.03%	$160K	NEW
76	R Squared Ltd	35,412	0.03%	$157K	NEW
77	NEW YORK STATE COMMON RETIREMENT FUND	34,922	0.03%	$155K	—
78	STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM	34,670	0.03%	$154K	—
79	MANUFACTURERS LIFE INSURANCE COMPANY, THE	33,965	0.03%	$150K	+1,766 (+5.5%)
80	STRS OHIO	32,000	0.02%	$142K	+5,800 (+22.1%)
81	Cerity Partners LLC	29,053	0.02%	$129K	-29,070 (-50.0%)
82	AXQ CAPITAL, LP	28,299	0.02%	$125K	+8,591 (+43.6%)
83	Focus Partners Wealth	28,205	0.02%	$125K	-5,472 (-16.2%)
84	MERCER GLOBAL ADVISORS INC /ADV	25,718	0.02%	$114K	-3,397 (-11.7%)
85	INTECH INVESTMENT MANAGEMENT LLC	25,633	0.02%	$114K	+4 (+0.0%)
86	Arax Advisory Partners	23,786	0.02%	$105K	+23,565 (+10662.9%)
87	PRUDENTIAL FINANCIAL INC	23,260	0.02%	$103K	-94,337 (-80.2%)
88	EntryPoint Capital, LLC	22,871	0.02%	$101K	NEW
89	Laurion Capital Management LP	22,263	0.02%	$99K	NEW
90	Quadrature Capital Ltd	21,420	0.02%	$95K	NEW
91	BAILARD, INC.	19,900	0.02%	$88K	—
92	State of Tennessee, Department of Treasury	19,809	0.02%	$88K	-3,091 (-13.5%)
93	HSBC HOLDINGS PLC	19,734	0.02%	$86K	NEW
94	BARCLAYS PLC	19,606	0.02%	$87K	-4,537 (-18.8%)
95	ProShare Advisors LLC	15,925	0.01%	$71K	-2,291 (-12.6%)
96	Tower Research Capital LLC (TRC)	15,594	0.01%	$69K	+5,354 (+52.3%)
97	ALGERT GLOBAL LLC	14,895	0.01%	$66K	-27,665 (-65.0%)
98	AMERIPRISE FINANCIAL INC	14,126	0.01%	$63K	-173,144 (-92.5%)
99	Aigen Investment Management, LP	14,029	0.01%	$62K	NEW
100	NorthCrest Asset Manangement, LLC	13,923	0.01%	$64K	-1,293 (-8.5%)
101	VICTORY CAPITAL MANAGEMENT INC	13,655	0.01%	$60K	-3,966 (-22.5%)
102	CAPTRUST FINANCIAL ADVISORS	13,068	0.01%	$58K	-3,366 (-20.5%)
103	SG Americas Securities, LLC	13,056	0.01%	$58K	-21,550 (-62.3%)
104	Everhart Financial Group, Inc.	12,962	0.01%	$57K	—
105	CAXTON ASSOCIATES LLP	11,931	0.01%	$53K	NEW
106	Legal & General Group Plc	11,810	0.01%	$52K	-171,050 (-93.5%)
107	XPONANCE LLC	11,573	0.01%	$51K	+980 (+9.3%)
108	AE Wealth Management LLC	11,512	0.01%	$51K	-2,681 (-18.9%)
109	Pallas Capital Advisors LLC	11,269	0.01%	$50K	-2,195 (-16.3%)
110	TWO SIGMA SECURITIES, LLC	11,180	0.01%	$50K	NEW
111	Brevan Howard Capital Management LP	10,438	0.01%	$46K	NEW
112	Ameritas Investment Partners, Inc.	9,823	0.01%	$44K	—
113	Quantbot Technologies LP	6,536	0.01%	$29K	NEW
114	State of Alaska, Department of Revenue	6,456	0.00%	$28K	-54,813 (-89.5%)
115	FEDERATED HERMES, INC.	6,078	0.00%	$27K	+743 (+13.9%)
116	ROYAL BANK OF CANADA	4,375	0.00%	$19K	+2,076 (+90.3%)
117	Caitong International Asset Management Co., Ltd	3,322	0.00%	$15K	-17,472 (-84.0%)
118	SBI Securities Co., Ltd.	3,010	0.00%	$13K	-2,000 (-39.9%)
119	Sterling Capital Management LLC	2,451	0.00%	$11K	-1,468 (-37.5%)
120	Rockefeller Capital Management L.P.	2,418	0.00%	$11K	-2,781 (-53.5%)
121	PNC Financial Services Group, Inc.	2,022	0.00%	$9K	-15,905 (-88.7%)
122	Private Wealth Management Group, LLC	1,694	0.00%	$8K	—
123	CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM	1,647	0.00%	$7K	-4,715 (-74.1%)
124	Essential Partners LLC	1,531	0.00%	$7K	-1,051 (-40.7%)
125	FIFTH THIRD BANCORP	1,452	0.00%	$6K	-23,457 (-94.2%)
126	EverSource Wealth Advisors, LLC	1,221	0.00%	$5K	-600 (-32.9%)
127	Allworth Financial LP	1,181	0.00%	$5K	-209 (-15.0%)
128	GAMMA Investing LLC	989	0.00%	$4K	-642 (-39.4%)
129	Global Retirement Partners, LLC	932	0.00%	$4K	NEW
130	UMB Bank, n.a.	833	0.00%	$4K	-572 (-40.7%)
131	IFP Advisors, Inc	597	0.00%	$3K	-389 (-39.5%)
132	BESSEMER GROUP INC	593	0.00%	$3K	—
133	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	582	0.00%	$3K	—
134	True Wealth Design, LLC	569	0.00%	$3K	-142 (-20.0%)
135	NISA INVESTMENT ADVISORS, LLC	558	0.00%	$2K	-3,196 (-85.1%)
136	US BANCORP \DE\	536	0.00%	$2K	-21 (-3.8%)
137	Versant Capital Management, Inc	515	0.00%	$2K	-2,220 (-81.2%)
138	Larson Financial Group LLC	435	0.00%	$2K	-36 (-7.6%)
139	ROTHSCHILD INVESTMENT LLC	299	0.00%	$1K	-95 (-24.1%)
140	Salomon & Ludwin, LLC	279	0.00%	$1K	-2,422 (-89.7%)
141	JONES FINANCIAL COMPANIES LLLP	254	0.00%	$1K	—
142	GROUP ONE TRADING LLC	250	0.00%	$1K	-1,950 (-88.6%)
143	Prestige Wealth Management Group LLC	240	0.00%	$1K	—
144	OSAIC HOLDINGS, INC.	185	0.00%	$819	-957 (-83.8%)
145	Farther Finance Advisors, LLC	145	0.00%	$641	-31 (-17.6%)
146	HANTZ FINANCIAL SERVICES, INC.	133	0.00%	$1K	-454 (-77.3%)
147	Fortitude Family Office, LLC	115	0.00%	$509	NEW
148	Plante Moran Financial Advisors, LLC	73	0.00%	$323	NEW
149	Covestor Ltd	71	0.00%	$0	+50 (+238.1%)
150	FARMERS & MERCHANTS INVESTMENTS INC	60	0.00%	$266	—
151	Clearstead Advisors, LLC	47	0.00%	$209	NEW
152	SIGNATUREFD, LLC	34	0.00%	$151	-404 (-92.2%)
153	Davis Capital Management	12	0.00%	$53	NEW
154	GILPIN WEALTH MANAGEMENT, LLC	9	0.00%	$40	-4 (-30.8%)

Exited since 2026-03-31 (39 filers; largest 25 shown)

BROWN CAPITAL MANAGEMENT LLC	−1,480,506
Simcoe Capital LLC	−882,113
PRINCIPAL FINANCIAL GROUP INC	−534,759
Public Sector Pension Investment Board	−394,718
STATE OF WISCONSIN INVESTMENT BOARD	−104,046
Thrivent Financial for Lutherans	−73,399
Illinois Municipal Retirement Fund	−60,877
CWM, LLC	−60,724
PANAGORA ASSET MANAGEMENT INC	−51,593
Louisiana State Employees Retirement System	−48,800
NEW YORK STATE TEACHERS RETIREMENT SYSTEM	−44,829
nVerses Capital, LLC	−38,319
AMALGAMATED BANK	−31,901
COMMONWEALTH OF PENNSYLVANIA PUBLIC SCHOOL EMPLS RETRMT SYS	−27,193
YOUSIF CAPITAL MANAGEMENT, LLC	−27,078
Virtu Financial LLC	−27,026
OREGON PUBLIC EMPLOYEES RETIREMENT FUND	−25,175
TEACHERS RETIREMENT SYSTEM OF THE STATE OF KENTUCKY	−24,338
Vanguard Personalized Indexing Management, LLC	−19,066
Mariner, LLC	−17,807
Merit Financial Group, LLC	−16,398
Maryland State Retirement & Pension System	−15,656
Dynamic Technology Lab Private Ltd	−14,778
MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC	−12,584
State of Wyoming	−12,253

Large holders from 13D/13G (latest per reporting person, last 2 years)

Filed when a holder crosses 5% or changes materially, so often more current than the quarter-end 13F. Percentages are the filer's own, against the share count they used.

Reporting person	Form	Filed	Event	Shares	% of class
Millennium Management LLC	SCHEDULE 13G/A	2026-08-06	2026-06-30	9,338,010	7.2%
Integrated Core Strategies (US) LLC	SCHEDULE 13G/A	2026-08-06	2026-06-30	7,162,923	5.5%
Israel A. Englander	SCHEDULE 13G/A	2026-08-06	2026-06-30	9,338,010	7.2%
Millennium Group Management LLC	SCHEDULE 13G/A	2026-08-06	2026-06-30	9,338,010	7.2%
Boston Partners	SCHEDULE 13G	2026-08-04	2026-06-30	7,635,145	5.91%
BlackRock, Inc.	SCHEDULE 13G/A	2026-07-08	2026-06-30	9,356,551	7.2%
The Vanguard Group	SCHEDULE 13G/A	2026-03-26	2026-03-13	0	0%
Collin McBirney	SCHEDULE 13G	2025-11-17	2025-09-25	6,780,847	5.3%
Topline Capital Management, LLC	SCHEDULE 13G	2025-11-17	2025-09-25	6,780,847	5.3%
Topline Capital Partners, LP	SCHEDULE 13G	2025-11-17	2025-09-25	6,780,847	5.3%
Brown Capital Management, LLC	SCHEDULE 13G/A	2025-11-12	2025-09-30	4,958,016	3.9%
Peter Kolchinsky	SCHEDULE 13G/A	2025-02-14	2024-12-31	0	0%
RA Capital Healthcare Fund, L.P.	SCHEDULE 13G/A	2025-02-14	2024-12-31	0	0%
RA Capital Management, L.P.	SCHEDULE 13G/A	2025-02-14	2024-12-31	0	0%
Rajeev Shah	SCHEDULE 13G/A	2025-02-14	2024-12-31	0	0%

Source: SEC Form 13F-HR information tables for the quarter ending 2026-06-30 (filed within 45 days of quarter end; amendments applied; values normalised to dollars), the share count from the company's latest 10-K/10-Q XBRL cover page, and Schedule 13D/13G filings. Each row is a legal 13F filer as filed — related entities (e.g. Vanguard's advisers) are not merged. Retail brokerage accounts are not reported on 13F, so the remainder is mostly retail and insiders.