Cytek BiosciencesCTKB
13F holders, Q2 2025 (June 30)158holders −2
23new positions
27sold out
4famous investors
$3.40avg. 13F price*
At the end of Q2 2025, 158 institutions reported holding Cytek Biosciences Inc. (CTKB) in their 13F filings, down 2 from Q1 2025. 23 opened new positions and 27 sold out. The largest holders were BlackRock, Inc. ($57.9M), Vanguard Group Inc. ($26.4M) and Brown Capital Management LLC ($24.2M). 4 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Cliff Asness (0.0% of AQR Capital Management's portfolio) and Israel Englander (0.0% of Millennium Management's portfolio).
- Company
- Cytek Biosciences Inc.
- CUSIP
- 23285D109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2025 → Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 23 | $4.1M |
| Exits | 27 | $7.1M |
All 13F filers, Q1 2025 → Q2 2025: 9,961,831 shares bought and 8,086,338 shares sold, net +1,875,493 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 158 holders
| BlackRock, Inc. | 0.00% | Reduce -5.7% | 17,035,535 | $57.9M |
| Vanguard Group Inc. | 0.00% | Reduce -19.3% | 7,765,138 | $26.4M |
| Brown Capital Management LLC | 0.70% | Reduce -4.7% | 7,109,995 | $24.2M |
| HHLR Advisors, LTD. | 0.73% | No change | 6,657,030 | $22.6M |
| Topline Capital Management, LLC | 3.05% | Add +255.7% | 5,231,260 | $17.8M |
| State Street Corp. | 0.00% | Reduce -4.8% | 4,173,763 | $14.2M |
| Dimensional Fund Advisors LP | 0.00% | Add +21.1% | 3,454,806 | $11.7M |
| Geode Capital Management, LLC | 0.00% | Add +1.6% | 2,729,593 | $9.3M |
| New York State Common Retirement Fund | 0.01% | No change | 2,088,390 | $7.1M |
| Royce & Associates LP | 0.05% | Add +145.6% | 1,389,806 | $4.7M |
| AQR Capital Management | 0.00% | Add +89.6% | 1,238,393 | $4.2M |
| Morgan Stanley | 0.00% | Add +54.3% | 1,150,121 | $3.9M |
| Northern Trust Corp. | 0.00% | Reduce -4.8% | 1,095,994 | $3.7M |
| Renaissance Technologies | 0.00% | Add +54.6% | 1,063,139 | $3.6M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -12.2% | 1,016,557 | $3.5M |
| Millennium Management | 0.00% | Add +86.7% | 924,772 | $3.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -17.7% | 909,590 | $3.1M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Add +25.4% | 888,339 | $3.0M |
| Bank of New York Mellon Corp | 0.00% | Add +1.1% | 699,913 | $2.4M |
| UBS Group AG | 0.00% | Add +3.4% | 632,052 | $2.1M |
| Citadel Advisors | 0.00% | Add +2.4% | 617,085 | $2.1M |
| Principal Financial Group Inc. | 0.00% | Add +9.9% | 572,387 | $1.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -35.9% | 430,108 | $1.5M |
| Numerai GP LLC | 0.21% | New | 422,318 | $1.4M |
| Ameriprise Financial Inc. | 0.00% | Add +48.7% | 412,311 | $1.4M |
| Barclays PLC | 0.00% | Add +153.8% | 387,908 | $1.3M |
| Algert Global LLC | 0.03% | Reduce -9.5% | 372,238 | $1.3M |
| Public Sector Pension Investment Board | 0.01% | Add +5.7% | 349,736 | $1.2M |
| Invesco Ltd. | 0.00% | Add +2.0% | 343,659 | $1.2M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -11.3% | 319,066 | $1.1M |
| State of Wisconsin Investment Board | 0.00% | Add +1.7% | 316,676 | $1.1M |
| Acadian Asset Management LLC | 0.00% | Add +671.3% | 313,644 | $1.1M |
| Legal & General Group Plc | 0.00% | Add +4.5% | 310,291 | $1.1M |
| Globeflex Capital L P | 0.08% | No change | 290,511 | $988K |
| Panagora Asset Management Inc. | 0.00% | Reduce -29.5% | 288,262 | $980K |
| Jane Street Group, LLC | 0.00% | Reduce -17.2% | 284,838 | $968K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Add +48.4% | 284,350 | $967K |
| Rhumbline Advisers | 0.00% | Reduce -4.6% | 282,651 | $961K |
| Marshall Wace, LLP | 0.00% | New | 261,352 | $889K |
| Nuveen, LLC | 0.00% | Reduce -16.8% | 253,808 | $863K |
| American Century Companies Inc. | 0.00% | Add +8.2% | 251,273 | $854K |
| ExodusPoint Capital Management, LP | 0.01% | New | 234,697 | $798K |
| Swiss National Bank | 0.00% | No change | 212,100 | $721K |
| Susquehanna International Group, LLP | 0.00% | Reduce -1.7% | 211,600 | $719K |
| FMR LLC | 0.00% | Reduce -71.3% | 205,741 | $700K |
| Alliancebernstein L.P. | 0.00% | No change | 151,848 | $516K |
| Squarepoint Ops LLC | 0.00% | Add +237.3% | 145,051 | $493K |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +199.6% | 144,252 | $490K |
| Ieq Capital, LLC | 0.00% | Add +140.6% | 138,761 | $472K |
| XTX Topco Ltd | 0.02% | Reduce -32.2% | 115,401 | $392K |
| Prudential Financial Inc. | 0.00% | Add +5.9% | 112,667 | $383K |
| Citigroup Inc. | 0.00% | Reduce -29.8% | 109,643 | $373K |
| California State Teachers Retirement System | 0.00% | No change | 105,185 | $358K |
| Caxton Associates LLP | 0.01% | Add +1.5% | 103,465 | $352K |
| Cubist Systematic Strategies, LLC | 0.00% | Add +68.7% | 96,844 | $329K |
| Teacher Retirement System of Texas | 0.00% | Add +1.6% | 92,638 | $315K |
| PDT Partners, LLC | 0.02% | Reduce -31.5% | 91,869 | $312K |
| Bank of America Corp. | 0.00% | Reduce -72.4% | 91,612 | $311K |
| Deutsche Bank AG | 0.00% | Reduce -18.0% | 77,048 | $262K |
| Franklin Resources Inc. | 0.00% | Add +0.6% | 76,588 | $260K |
| Wells Fargo & Company | 0.00% | Add +5.5% | 75,451 | $257K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -1.6% | 75,439 | $256K |
| MetLife Investment Management, LLC | 0.00% | Add +8.2% | 73,298 | $249K |
| Public Employees Retirement System of Ohio | 0.00% | Add +448.1% | 68,906 | $234K |
| Janus Henderson Group PLC | 0.00% | No change | 64,873 | $221K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -8.8% | 64,390 | $219K |
| State of Alaska, Department of Revenue | 0.00% | Add +5.4% | 60,953 | $206K |
| T. Rowe Price Associates Inc. | 0.00% | Add +6.5% | 56,821 | $194K |
| HRT Financial LP | 0.00% | Reduce -65.8% | 56,620 | $192K |
| Creative Planning | 0.00% | Add +455.4% | 55,677 | $189K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -31.1% | 55,122 | $187K |
| Cerity Partners LLC | 0.00% | New | 51,362 | $175K |
| New York State Teachers Retirement System | 0.00% | No change | 48,463 | $165K |
| Louisiana State Employees Retirement System | 0.00% | Reduce -2.4% | 47,900 | $163K |
| EntryPoint Capital, LLC | 0.08% | New | 47,746 | $162K |
| Intech Investment Management LLC | 0.00% | Reduce -30.8% | 46,942 | $160K |
| Dynamic Technology Lab Private Ltd | 0.02% | Add +244.1% | 45,714 | $155K |
| Cwm, LLC | 0.00% | Add +152.1% | 45,420 | $154K |
| Trexquant Investment LP | 0.00% | Reduce -91.8% | 45,131 | $153K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +0.9% | 44,441 | $151K |
| Voya Investment Management LLC | 0.00% | Reduce -52.3% | 38,312 | $130K |
| Gsa Capital Partners LLP | 0.01% | Reduce -55.5% | 35,166 | $120K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 34,670 | $118K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +97.7% | 31,067 | $117K |
| Summit Securities Group LLC | 0.04% | New | 33,276 | $113K |
| Bank of Montreal | 0.00% | Add +110.7% | 33,072 | $112K |
| Arizona State Retirement System | 0.00% | Add +1.1% | 31,721 | $108K |
| Point72 Asia (Singapore) Pte. Ltd. | 0.02% | Add +100.3% | 31,595 | $107K |
| Yousif Capital Management, LLC | 0.00% | No change | 31,202 | $106K |
| Brooklyn Investment Group | 0.01% | Add +209.0% | 30,664 | $104K |
| Comerica Bank | 0.00% | Add +1.6% | 30,413 | $103K |
| Amalgamated Bank | 0.00% | Add +2.5% | 29,931 | $102K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 29,469 | $100K |
| Russell Investments Group, Ltd. | 0.00% | Reduce -58.8% | 27,795 | $95K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | Add +5.5% | 26,340 | $90K |
| STRS Ohio | 0.00% | No change | 26,200 | $89K |
| ProShare Advisors LLC | 0.00% | Reduce -6.5% | 25,970 | $88K |
| Quantbot Technologies LP | 0.00% | New | 24,731 | $84K |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -63.6% | 24,710 | $84K |
| Diversified Trust Co. | 0.00% | No change | 24,532 | $83K |
"% of holder's portfolio" is CTKB's weight in each manager's 13F, not the share of Cytek Biosciences Inc. the manager owns.