Cytek BiosciencesCTKB
13F holders, Q2 2026 (June 30)154holders −11
27new positions
38sold out
7famous investors
$4.43avg. 13F price*
At the end of Q2 2026, 154 institutions reported holding Cytek Biosciences Inc. (CTKB) in their 13F filings, down 11 from Q1 2026. 27 opened new positions and 38 sold out. The largest holders were BlackRock, Inc. ($42.4M), Millennium Management ($41.4M) and Boston Partners ($33.9M). 7 famous investors held it, including Israel Englander (0.0% of Millennium Management's portfolio), Paul Tudor Jones (0.0% of Tudor Investment Corporation's portfolio) and Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio).
- Company
- Cytek Biosciences Inc.
- CUSIP
- 23285D109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 27 | $16.5M |
| Exits | 38 | $17.6M |
All 13F filers, Q1 2026 → Q2 2026: 15,095,019 shares bought and 18,585,582 shares sold, net −3,490,563 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 154 holders
| BlackRock, Inc. | 0.00% | Reduce -43.7% | 9,578,643 | $42.4M |
| Millennium Management | 0.03% | Add +48.4% | 9,338,010 | $41.4M |
| Boston Partners | 0.03% | Add +32.0% | 7,660,943 | $33.9M |
| HHLR Advisors, LTD. | 3.54% | No change | 6,657,030 | $29.5M |
| Topline Capital Management, LLC | 7.22% | Reduce -11.1% | 6,283,450 | $27.8M |
| Vanguard Capital Management LLC | 0.00% | Add +3.7% | 4,939,597 | $21.9M |
| Geode Capital Management, LLC | 0.00% | Add +8.0% | 3,059,573 | $13.6M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -1.8% | 2,616,257 | $11.6M |
| State Street Corp. | 0.00% | Reduce -37.8% | 2,566,121 | $11.4M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -7.6% | 2,167,515 | $9.6M |
| Royce & Associates LP | 0.07% | Add +26.7% | 2,081,579 | $9.2M |
| Russell Investments Group, Ltd. | 0.01% | Add +11.1% | 1,511,315 | $6.7M |
| Acadian Asset Management LLC | 0.01% | Add +244.9% | 1,376,048 | $6.1M |
| Bank of America Corp. | 0.00% | Add +30.4% | 1,315,332 | $5.8M |
| Vanguard Portfolio Management LLC | 0.00% | Reduce -50.6% | 1,141,592 | $5.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Reduce -2.8% | 1,073,253 | $4.8M |
| Northern Trust Corp. | 0.00% | Reduce -0.2% | 1,003,294 | $4.4M |
| HRT Financial LP | 0.01% | Add +141.0% | 997,769 | $4.4M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +204.4% | 973,833 | $4.3M |
| Jane Street Group, LLC | 0.00% | New | 906,162 | $4.0M |
| Tudor Investment Corporation | 0.02% | Add +161.3% | 837,913 | $3.7M |
| AQR Capital Management | 0.00% | Reduce -10.8% | 813,971 | $3.6M |
| Vanguard Fiduciary Trust Co. | 0.00% | Add +3.3% | 740,662 | $3.3M |
| Citadel Advisors | 0.00% | Add +53.0% | 721,470 | $3.2M |
| Morgan Stanley | 0.00% | Reduce -59.2% | 701,792 | $3.1M |
| Qube Research & Technologies Ltd | 0.00% | New | 689,821 | $3.1M |
| Susquehanna International Group, LLP | 0.00% | Add +1117.1% | 681,705 | $3.0M |
| D. E. Shaw & Co. | 0.00% | Add +157.3% | 669,182 | $3.0M |
| Renaissance Technologies | 0.00% | Reduce -2.3% | 661,300 | $2.9M |
| FMR LLC | 0.00% | Add +78.0% | 504,385 | $2.2M |
| Marshall Wace, LLP | 0.00% | New | 441,704 | $2.0M |
| Point72 Asset Management | 0.00% | New | 422,361 | $1.9M |
| Jain Global LLC | 0.02% | New | 411,465 | $1.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -39.0% | 371,427 | $1.6M |
| American Century Companies Inc. | 0.00% | Add +3.7% | 292,103 | $1.3M |
| Nuveen, LLC | 0.00% | Add +17.9% | 289,415 | $1.3M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Add +10.5% | 266,938 | $1.2M |
| Jacobs Levy Equity Management, Inc. | 0.00% | Reduce -6.1% | 241,581 | $1.1M |
| BNP Paribas Financial Markets | 0.00% | Add +175.5% | 215,010 | $952K |
| Y-Intercept (Hong Kong) Ltd | 0.02% | New | 193,128 | $856K |
| Invesco Ltd. | 0.00% | Reduce -52.2% | 185,671 | $823K |
| Two Sigma Investments, LP | 0.00% | Add +557.1% | 168,218 | $745K |
| Gsa Capital Partners LLP | 0.05% | Add +53.6% | 167,593 | $742K |
| Numerai GP LLC | 0.06% | Add +41.8% | 159,465 | $706K |
| Franklin Resources Inc. | 0.00% | Add +36.9% | 156,061 | $691K |
| Rhumbline Advisers | 0.00% | Reduce -39.8% | 153,225 | $679K |
| CenterBook Partners LP | 0.03% | Reduce -79.6% | 149,180 | $661K |
| Jump Financial, LLC | 0.01% | Add +412.5% | 148,083 | $656K |
| XTX Topco Ltd | 0.01% | New | 142,723 | $632K |
| Alliancebernstein L.P. | 0.00% | No change | 141,048 | $616K |
| JPMorgan Chase & Co. | 0.00% | Reduce -52.6% | 141,864 | $616K |
| Deutsche Bank AG | 0.00% | Add +7.2% | 111,932 | $496K |
| Wells Fargo & Company | 0.00% | Add +126.8% | 102,704 | $455K |
| T. Rowe Price Associates Inc. | 0.00% | Add +26.3% | 101,198 | $449K |
| Ieq Capital, LLC | 0.00% | Reduce -37.6% | 90,100 | $399K |
| UBS Group AG | 0.00% | Reduce -52.4% | 88,914 | $394K |
| PDT Partners, LLC | 0.02% | No change | 86,869 | $385K |
| Squarepoint Ops LLC | 0.00% | Add +227.2% | 82,776 | $367K |
| Aquatic Capital Management LLC | 0.01% | New | 76,762 | $340K |
| Voya Investment Management LLC | 0.00% | Reduce -47.6% | 74,034 | $328K |
| MetLife Investment Management, LLC | 0.00% | Add +6.5% | 68,692 | $304K |
| Creative Planning | 0.00% | Reduce -30.4% | 62,555 | $277K |
| Catalyst Funds Management Pty Ltd | 0.02% | New | 62,500 | $277K |
| Los Angeles Capital Management LLC | 0.00% | New | 62,160 | $275K |
| Quantinno Capital Management LP | 0.00% | Add +11.0% | 56,823 | $252K |
| Citigroup Inc. | 0.00% | Add +350.7% | 56,130 | $249K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Add +1.6% | 56,017 | $248K |
| Balyasny Asset Management L.P. | 0.00% | New | 54,381 | $241K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Reduce -14.9% | 61,873 | $222K |
| Prelude Capital Management, LLC | 0.01% | Add +242.9% | 45,259 | $200K |
| Vanguard Global Advisers, LLC | 0.00% | No change | 45,212 | $200K |
| Canada Pension Plan Investment Board | 0.00% | No change | 41,300 | $183K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | Add +35.5% | 39,936 | $177K |
| Campbell & CO Investment Adviser LLC | 0.01% | New | 39,333 | $174K |
| ExodusPoint Capital Management, LP | 0.00% | New | 36,140 | $160K |
| R Squared Ltd | 0.08% | New | 35,412 | $157K |
| New York State Common Retirement Fund | 0.00% | No change | 34,922 | $155K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 34,670 | $154K |
| Manufacturers Life Insurance Company, The | 0.00% | Add +5.5% | 33,965 | $150K |
| STRS Ohio | 0.00% | Add +22.1% | 32,000 | $142K |
| Cerity Partners LLC | 0.00% | Reduce -50.0% | 29,053 | $129K |
| Axq Capital, LP | 0.01% | Add +43.6% | 28,299 | $125K |
| Focus Partners Wealth | 0.00% | Reduce -16.3% | 28,205 | $125K |
| Mercer Global Advisors Inc. | 0.00% | Reduce -11.7% | 25,718 | $114K |
| Intech Investment Management LLC | 0.00% | Add +0.0% | 25,633 | $114K |
| Arax Advisory Partners | 0.00% | Add +10662.9% | 23,786 | $105K |
| Prudential Financial Inc. | 0.00% | Reduce -80.2% | 23,260 | $103K |
| EntryPoint Capital, LLC | 0.02% | New | 22,871 | $101K |
| Laurion Capital Management LP | 0.01% | New | 22,263 | $99K |
| Quadrature Capital Ltd | 0.00% | New | 21,420 | $95K |
| Bailard, Inc. | 0.00% | No change | 19,900 | $88K |
| State of Tennessee, Department of Treasury | 0.00% | Reduce -13.5% | 19,809 | $88K |
| Barclays PLC | 0.00% | Reduce -18.8% | 19,606 | $87K |
| HSBC Holdings PLC | 0.00% | New | 19,734 | $86K |
| ProShare Advisors LLC | 0.00% | Reduce -12.6% | 15,925 | $71K |
| Tower Research Capital LLC (TRC) | 0.00% | Add +52.3% | 15,594 | $69K |
| Algert Global LLC | 0.00% | Reduce -65.0% | 14,895 | $66K |
| NorthCrest Asset Manangement, LLC | 0.00% | Reduce -8.5% | 13,923 | $64K |
| Ameriprise Financial Inc. | 0.00% | Reduce -92.5% | 14,126 | $63K |
| Aigen Investment Management, LP | 0.02% | New | 14,029 | $62K |
| Victory Capital Management Inc. | 0.00% | Reduce -22.5% | 13,655 | $60K |
| SG Americas Securities, LLC | 0.00% | Reduce -62.3% | 13,056 | $58K |
| Captrust Financial Advisors | 0.00% | Reduce -20.5% | 13,068 | $58K |
| Everhart Financial Group, Inc. | 0.00% | No change | 12,962 | $57K |
| Caxton Associates LLP | 0.00% | New | 11,931 | $53K |
| Legal & General Group Plc | 0.00% | Reduce -93.5% | 11,810 | $52K |
| Xponance LLC | 0.00% | Add +9.3% | 11,573 | $51K |
| AE Wealth Management LLC | 0.00% | Reduce -18.9% | 11,512 | $51K |
| Pallas Capital Advisors LLC | 0.00% | Reduce -16.3% | 11,269 | $50K |
| Two Sigma Securities, LLC | 0.00% | New | 11,180 | $50K |
| Brevan Howard Capital Management LP | 0.00% | New | 10,438 | $46K |
| Ameritas Investment Partners, Inc. | 0.00% | No change | 9,823 | $44K |
| Quantbot Technologies LP | 0.00% | New | 6,536 | $29K |
| State of Alaska, Department of Revenue | 0.00% | Reduce -89.5% | 6,456 | $28K |
| Federated Hermes, Inc. | 0.00% | Add +13.9% | 6,078 | $27K |
| Royal Bank of Canada | 0.00% | Add +90.3% | 4,375 | $19K |
| Caitong International Asset Management Co., Ltd | 0.00% | Reduce -84.0% | 3,322 | $15K |
| SBI Securities Co., Ltd. | 0.00% | Reduce -39.9% | 3,010 | $13K |
| Sterling Capital Management LLC | 0.00% | Reduce -37.5% | 2,451 | $11K |
| Rockefeller Capital Management L.P. | 0.00% | Reduce -53.5% | 2,418 | $11K |
| PNC Financial Services Group, Inc. | 0.00% | Reduce -88.7% | 2,022 | $9K |
| Private Wealth Management Group, LLC | 0.00% | No change | 1,694 | $8K |
| California State Teachers Retirement System | 0.00% | Reduce -74.1% | 1,647 | $7K |
| Essential Partners LLC | 0.00% | Reduce -40.7% | 1,531 | $7K |
| Fifth Third Bancorp | 0.00% | Reduce -94.2% | 1,452 | $6K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -33.0% | 1,221 | $5K |
| Allworth Financial LP | 0.00% | Reduce -15.0% | 1,181 | $5K |
| GAMMA Investing LLC | 0.00% | Reduce -39.4% | 989 | $4K |
| Global Retirement Partners, LLC | 0.00% | — | 932 | $4K |
| UMB Bank, n.a. | 0.00% | Reduce -40.7% | 833 | $4K |
| Bessemer Group Inc. | 0.00% | No change | 593 | $3K |
| IFP Advisors, Inc | 0.00% | Reduce -39.5% | 597 | $3K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | No change | 582 | $3K |
| True Wealth Design, LLC | 0.00% | Reduce -20.0% | 569 | $3K |
| Nisa Investment Advisors, LLC | 0.00% | Reduce -85.1% | 558 | $2K |
| US Bancorp \de | 0.00% | Reduce -3.8% | 536 | $2K |
| Versant Capital Management, Inc | 0.00% | Reduce -81.2% | 515 | $2K |
| Larson Financial Group LLC | 0.00% | Reduce -7.6% | 435 | $2K |
| Rothschild Investment LLC | 0.00% | Reduce -24.1% | 299 | $1K |
| Salomon & Ludwin, LLC | 0.00% | Reduce -89.7% | 279 | $1K |
| Jones Financial Companies LLLP | 0.00% | No change | 254 | $1K |
| Group One Trading LLC | 0.00% | Reduce -88.6% | 250 | $1K |
| Prestige Wealth Management Group LLC | 0.00% | No change | 240 | $1K |
| Hantz Financial Services, Inc. | 0.00% | Reduce -77.3% | 133 | $1K |
| Osaic Holdings, Inc. | 0.00% | Reduce -83.8% | 185 | $819 |
| Farther Finance Advisors, LLC | 0.00% | Reduce -17.6% | 145 | $641 |
| Fortitude Family Office, LLC | 0.00% | New | 115 | $509 |
| Plante Moran Financial Advisors, LLC | 0.00% | New | 73 | $323 |
| Farmers & Merchants Investments Inc. | 0.00% | No change | 60 | $266 |
| Clearstead Advisors, LLC | 0.00% | New | 47 | $209 |
| Signaturefd, LLC | 0.00% | Reduce -92.2% | 34 | $151 |
| Davis Capital Management | 0.00% | New | 12 | $53 |
| Gilpin Wealth Management, LLC | 0.00% | Reduce -30.8% | 9 | $40 |
| Covestor Ltd | 0.00% | Add +238.1% | 71 | $0 |
"% of holder's portfolio" is CTKB's weight in each manager's 13F, not the share of Cytek Biosciences Inc. the manager owns.