Cytek BiosciencesCTKB
13F holders, Q4 2025 (December 31)155holders +2
17new positions
15sold out
6famous investors
$5.05avg. 13F price*
At the end of Q4 2025, 155 institutions reported holding Cytek Biosciences Inc. (CTKB) in their 13F filings, up 2 from Q3 2025. 17 opened new positions and 15 sold out. The largest holders were BlackRock, Inc. ($86.7M), Vanguard Group Inc. ($37.8M) and Topline Capital Management, LLC ($37.6M). 6 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio) and Cliff Asness (0.0% of AQR Capital Management's portfolio).
- Company
- Cytek Biosciences Inc.
- CUSIP
- 23285D109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 17 | $2.9M |
| Exits | 15 | $3.5M |
All 13F filers, Q3 2025 → Q4 2025: 11,164,750 shares bought and 9,231,925 shares sold, net +1,932,825 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 155 holders
| BlackRock, Inc. | 0.00% | Add +3.8% | 17,173,028 | $86.7M |
| Vanguard Group Inc. | 0.00% | Add +7.8% | 7,475,477 | $37.8M |
| Topline Capital Management, LLC | 3.40% | Add +7.2% | 7,442,466 | $37.6M |
| HHLR Advisors, LTD. | 1.08% | No change | 6,657,030 | $33.6M |
| Boston Partners | 0.03% | Add +13369.4% | 5,008,309 | $25.3M |
| Millennium Management | 0.02% | Add +39.0% | 4,752,447 | $24.0M |
| State Street Corp. | 0.00% | Add +1.5% | 4,146,964 | $20.9M |
| Geode Capital Management, LLC | 0.00% | Add +0.3% | 2,790,574 | $14.1M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -17.7% | 2,646,891 | $13.4M |
| Brown Capital Management LLC | 0.86% | Reduce -58.2% | 2,072,915 | $10.5M |
| Goldman Sachs Group Inc. | 0.00% | Add +3.0% | 1,789,914 | $9.0M |
| Morgan Stanley | 0.00% | Add +16.3% | 1,700,985 | $8.6M |
| Royce & Associates LP | 0.09% | Reduce -4.0% | 1,692,657 | $8.5M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -0.9% | 1,094,539 | $5.5M |
| Russell Investments Group, Ltd. | 0.01% | Add +527.6% | 1,001,127 | $5.1M |
| Northern Trust Corp. | 0.00% | Reduce -5.5% | 957,594 | $4.8M |
| Bank of America Corp. | 0.00% | Add +403.1% | 856,161 | $4.3M |
| Wellington Management Group LLP | 0.00% | Reduce -69.9% | 764,279 | $3.9M |
| AQR Capital Management | 0.00% | Reduce -27.1% | 743,455 | $3.8M |
| Renaissance Technologies | 0.01% | Reduce -15.2% | 675,000 | $3.4M |
| Acadian Asset Management LLC | 0.01% | Add +19.3% | 674,475 | $3.4M |
| Principal Financial Group Inc. | 0.00% | Add +7.0% | 666,927 | $3.4M |
| Bank of New York Mellon Corp | 0.00% | Reduce -5.3% | 637,929 | $3.2M |
| UBS Group AG | 0.00% | Reduce -1.8% | 460,047 | $2.3M |
| HRT Financial LP | 0.01% | New | 437,653 | $2.2M |
| Invesco Ltd. | 0.00% | Add +2.5% | 398,797 | $2.0M |
| Public Sector Pension Investment Board | 0.01% | Reduce -11.1% | 379,274 | $1.9M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +0.1% | 361,677 | $1.8M |
| JPMorgan Chase & Co. | 0.00% | Reduce -8.3% | 328,853 | $1.7M |
| Simcoe Capital LLC | 1.42% | — | 298,461 | $1.5M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -0.8% | 295,636 | $1.5M |
| American Century Companies Inc. | 0.00% | Add +2.8% | 284,644 | $1.4M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -68.0% | 264,177 | $1.3M |
| D. E. Shaw & Co. | 0.00% | Add +117.4% | 263,126 | $1.3M |
| Nuveen, LLC | 0.00% | No change | 253,808 | $1.3M |
| Rhumbline Advisers | 0.00% | Reduce -10.8% | 249,940 | $1.3M |
| FMR LLC | 0.00% | Add +29.5% | 234,072 | $1.2M |
| Ameriprise Financial Inc. | 0.00% | Reduce -38.4% | 202,316 | $1.0M |
| Legal & General Group Plc | 0.00% | Reduce -2.0% | 188,468 | $952K |
| Numerai GP LLC | 0.11% | Add +75.4% | 186,764 | $943K |
| Barclays PLC | 0.00% | Add +10.7% | 183,239 | $925K |
| State of Wisconsin Investment Board | 0.00% | Reduce -50.2% | 168,563 | $851K |
| Citadel Advisors | 0.00% | Add +102.6% | 166,754 | $842K |
| Alliancebernstein L.P. | 0.00% | Reduce -5.8% | 141,048 | $712K |
| Wells Fargo & Company | 0.00% | Add +46.8% | 132,675 | $670K |
| Ieq Capital, LLC | 0.00% | Reduce -18.9% | 123,991 | $626K |
| Creative Planning | 0.00% | Add +11.6% | 121,209 | $612K |
| Point72 Asset Management | 0.00% | Reduce -39.1% | 114,256 | $577K |
| Prudential Financial Inc. | 0.00% | Reduce -5.2% | 106,857 | $540K |
| BNP Paribas Financial Markets | 0.00% | Add +346.3% | 106,282 | $537K |
| Voya Investment Management LLC | 0.00% | Reduce -15.7% | 97,830 | $494K |
| Deutsche Bank AG | 0.00% | Add +4.6% | 93,139 | $470K |
| PDT Partners, LLC | 0.03% | No change | 91,869 | $464K |
| Jane Street Group, LLC | 0.00% | Reduce -77.9% | 78,758 | $398K |
| Thrivent Financial for Lutherans | 0.00% | Reduce -4.3% | 75,560 | $382K |
| T. Rowe Price Associates Inc. | 0.00% | Add +12.3% | 69,793 | $353K |
| SG Americas Securities, LLC | 0.00% | Add +7.9% | 64,287 | $325K |
| State of Alaska, Department of Revenue | 0.00% | Reduce -0.4% | 61,269 | $308K |
| MetLife Investment Management, LLC | 0.00% | Reduce -17.4% | 57,758 | $292K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -1.2% | 54,611 | $276K |
| Cwm, LLC | 0.00% | Reduce -4.5% | 52,614 | $266K |
| Intech Investment Management LLC | 0.00% | Add +6.7% | 51,740 | $261K |
| Panagora Asset Management Inc. | 0.00% | Reduce -17.6% | 51,593 | $261K |
| Louisiana State Employees Retirement System | 0.00% | Add +0.2% | 50,400 | $255K |
| Cerity Partners LLC | 0.00% | Reduce -4.7% | 49,528 | $250K |
| New York State Teachers Retirement System | 0.00% | No change | 48,463 | $245K |
| Susquehanna International Group, LLP | 0.00% | Reduce -75.1% | 48,103 | $243K |
| Caxton Associates LLP | 0.00% | Reduce -51.4% | 45,376 | $229K |
| Dynamic Technology Lab Private Ltd | 0.05% | Add +26.1% | 44,274 | $224K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -1.8% | 35,725 | $202K |
| Quantbot Technologies LP | 0.01% | Add +13.6% | 38,533 | $195K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -12.5% | 35,632 | $180K |
| New York State Common Retirement Fund | 0.00% | Reduce -89.5% | 34,922 | $176K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 34,670 | $175K |
| XTX Topco Ltd | 0.00% | Reduce -52.4% | 34,565 | $175K |
| Focus Partners Wealth | 0.00% | Reduce -52.5% | 33,497 | $169K |
| Amalgamated Bank | 0.00% | Add +1.6% | 32,436 | $164K |
| Two Sigma Investments, LP | 0.00% | Reduce -82.9% | 30,032 | $152K |
| Quantinno Capital Management LP | 0.00% | New | 29,648 | $150K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 29,469 | $149K |
| Bailard, Inc. | 0.00% | No change | 29,300 | $148K |
| Yousif Capital Management, LLC | 0.00% | Reduce -3.5% | 26,610 | $141K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | Reduce -2.3% | 27,223 | $137K |
| STRS Ohio | 0.00% | No change | 26,200 | $132K |
| Oregon Public Employees Retirement Fund | 0.00% | Add +2.0% | 25,175 | $127K |
| Teachers Retirement System of the State of Kentucky | 0.00% | No change | 24,338 | $123K |
| Comerica Bank | 0.00% | Reduce -10.4% | 23,997 | $121K |
| ProShare Advisors LLC | 0.00% | Add +3.3% | 22,733 | $115K |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -61.1% | 22,900 | $115K |
| Citigroup Inc. | 0.00% | Reduce -55.6% | 22,163 | $112K |
| Mercer Global Advisors Inc. | 0.00% | Reduce -0.0% | 21,726 | $110K |
| Los Angeles Capital Management LLC | 0.00% | New | 27,420 | $105K |
| Axq Capital, LP | 0.02% | New | 19,124 | $97K |
| Mariner, LLC | 0.00% | Reduce -31.0% | 18,565 | $94K |
| Victory Capital Management Inc. | 0.00% | Reduce -13.7% | 17,628 | $89K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -5.7% | 16,337 | $83K |
| Maryland State Retirement & Pension System | 0.00% | New | 15,656 | $79K |
| NorthCrest Asset Manangement, LLC | 0.00% | Add +0.1% | 14,289 | $74K |
| Captrust Financial Advisors | 0.00% | Reduce -8.1% | 14,047 | $71K |
| Pallas Capital Advisors LLC | 0.00% | Reduce -3.1% | 13,953 | $70K |
| Prelude Capital Management, LLC | 0.01% | New | 13,400 | $68K |
| State of Wyoming | 0.01% | Add +21.1% | 13,022 | $66K |
| Everhart Financial Group, Inc. | 0.01% | No change | 12,962 | $65K |
| Mutual of America Capital Management LLC | 0.00% | Add +2.5% | 12,568 | $63K |
| Neuberger Berman Group LLC | 0.00% | New | 12,404 | $63K |
| Vanguard Personalized Indexing Management, LLC | 0.00% | Add +5.9% | 12,245 | $62K |
| Franklin Resources Inc. | 0.00% | Reduce -88.1% | 10,357 | $52K |
| M&T Bank Corp | 0.00% | New | 10,257 | $52K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 9,823 | $50K |
| California State Teachers Retirement System | 0.00% | Reduce -17.8% | 7,237 | $37K |
| Sterling Capital Management LLC | 0.00% | Reduce -15.9% | 6,822 | $34K |
| Royal Bank of Canada | 0.00% | Add +34.0% | 5,525 | $28K |
| Caitong International Asset Management Co., Ltd | 0.01% | Add +86.7% | 5,144 | $26K |
| SBI Securities Co., Ltd. | 0.00% | Add +99.6% | 5,010 | $25K |
| Federated Hermes, Inc. | 0.00% | Add +5.3% | 4,579 | $23K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -25.1% | 3,653 | $18K |
| Pinnacle Wealth Planning Services, Inc. | 0.00% | New | 3,488 | $18K |
| Tower Research Capital LLC (TRC) | 0.00% | Reduce -58.9% | 3,238 | $16K |
| Simplex Trading, LLC | 0.00% | Add +192.4% | 2,003 | $10K |
| Essential Partners LLC | 0.00% | Reduce -18.6% | 1,934 | $10K |
| Private Wealth Management Group, LLC | 0.00% | No change | 1,694 | $9K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -11.5% | 1,579 | $8K |
| Group One Trading LLC | 0.00% | New | 1,500 | $8K |
| UMB Bank, n.a. | 0.00% | Add +48.4% | 1,382 | $7K |
| Allworth Financial LP | 0.00% | Add +5.2% | 1,049 | $5K |
| Rockefeller Capital Management L.P. | 0.00% | Add +486.3% | 1,026 | $5K |
| Fifth Third Bancorp | 0.00% | Add +6.0% | 912 | $5K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | New | 832 | $4K |
| IFP Advisors, Inc | 0.00% | No change | 710 | $4K |
| True Wealth Design, LLC | 0.00% | Reduce -25.0% | 613 | $3K |
| Bessemer Group Inc. | 0.00% | Add +90.1% | 593 | $3K |
| GAMMA Investing LLC | 0.00% | New | 517 | $3K |
| Salomon & Ludwin, LLC | 0.00% | Add +64.9% | 460 | $2K |
| US Bancorp \de | 0.00% | No change | 454 | $2K |
| Signaturefd, LLC | 0.00% | No change | 438 | $2K |
| Versant Capital Management, Inc | 0.00% | No change | 435 | $2K |
| Aquatic Capital Management LLC | 0.00% | Reduce -99.6% | 306 | $2K |
| Rothschild Investment LLC | 0.00% | Add +4.2% | 276 | $1K |
| Jones Financial Companies LLLP | 0.00% | No change | 254 | $1K |
| Prestige Wealth Management Group LLC | 0.00% | No change | 240 | $1K |
| Hantz Financial Services, Inc. | 0.00% | New | 289 | $1K |
| Parkside Financial Bank & Trust | 0.00% | Add +192.4% | 193 | $976 |
| Smartleaf Asset Management LLC | 0.00% | New | 127 | $640 |
| Osaic Holdings, Inc. | 0.00% | Add +485.0% | 117 | $591 |
| Farther Finance Advisors, LLC | 0.00% | No change | 95 | $480 |
| Farmers & Merchants Investments Inc. | 0.00% | No change | 60 | $303 |
| Larson Financial Group LLC | 0.00% | New | 54 | $273 |
| CIBC Private Wealth Group LLC | 0.00% | New | 26 | $131 |
| Clearstead Advisors, LLC | 0.00% | Reduce -97.8% | 24 | $122 |
| Cedar Mountain Advisors, LLC | 0.00% | New | 21 | $106 |
| Ankerstar Wealth, LLC | 0.00% | — | 14 | $71 |
| Arax Advisory Partners | 0.00% | Reduce -100.0% | 12 | $61 |
| Gilpin Wealth Management, LLC | 0.00% | — | 9 | $46 |
| Keating Financial Advisory Services, Inc. | 0.00% | — | 2 | $10 |
| Covestor Ltd | 0.00% | No change | 21 | $0 |
"% of holder's portfolio" is CTKB's weight in each manager's 13F, not the share of Cytek Biosciences Inc. the manager owns.