Cytek BiosciencesCTKB
13F holders, Q3 2025 (September 30)153holders −5
19new positions
24sold out
7famous investors
$3.86avg. 13F price*
At the end of Q3 2025, 153 institutions reported holding Cytek Biosciences Inc. (CTKB) in their 13F filings, down 5 from Q2 2025. 19 opened new positions and 24 sold out. The largest holders were BlackRock, Inc. ($57.4M), Focus Partners Wealth ($31.2M) and Topline Capital Management, LLC ($24.1M). 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 Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 19 | $43.2M |
| Exits | 24 | $5.9M |
All 13F filers, Q2 2025 → Q3 2025: 10,989,959 shares bought and 10,380,252 shares sold, net +609,707 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 153 holders
| BlackRock, Inc. | 0.00% | Reduce -2.9% | 16,547,693 | $57.4M |
| Focus Partners Wealth | 0.05% | New | 70,576 | $31.2M |
| Topline Capital Management, LLC | 4.14% | Add +32.8% | 6,944,280 | $24.1M |
| Vanguard Group Inc. | 0.00% | Reduce -10.7% | 6,933,504 | $24.1M |
| HHLR Advisors, LTD. | 0.56% | No change | 6,657,030 | $23.1M |
| Brown Capital Management LLC | 0.71% | Reduce -30.3% | 4,958,016 | $17.2M |
| State Street Corp. | 0.00% | Reduce -2.1% | 4,084,368 | $14.2M |
| Millennium Management | 0.01% | Add +269.6% | 3,418,382 | $11.9M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -6.9% | 3,217,788 | $11.2M |
| Geode Capital Management, LLC | 0.00% | Add +2.0% | 2,783,449 | $9.7M |
| Wellington Management Group LLP | 0.00% | New | 2,541,046 | $8.8M |
| Royce & Associates LP | 0.06% | Add +26.9% | 1,763,262 | $6.1M |
| Goldman Sachs Group Inc. | 0.00% | Add +70.9% | 1,737,309 | $6.0M |
| Morgan Stanley | 0.00% | Add +27.2% | 1,463,141 | $5.1M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +21.5% | 1,105,021 | $3.8M |
| AQR Capital Management | 0.00% | Reduce -17.6% | 1,019,890 | $3.5M |
| Northern Trust Corp. | 0.00% | Reduce -7.5% | 1,013,583 | $3.5M |
| Jacobs Levy Equity Management, Inc. | 0.01% | Reduce -7.2% | 824,436 | $2.9M |
| Renaissance Technologies | 0.00% | Reduce -25.2% | 795,544 | $2.8M |
| Bank of New York Mellon Corp | 0.00% | Reduce -3.8% | 673,569 | $2.3M |
| Principal Financial Group Inc. | 0.00% | Add +8.9% | 623,306 | $2.2M |
| Acadian Asset Management LLC | 0.00% | Add +80.3% | 565,573 | $2.0M |
| UBS Group AG | 0.00% | Reduce -25.9% | 468,689 | $1.6M |
| Public Sector Pension Investment Board | 0.01% | Add +22.0% | 426,806 | $1.5M |
| Invesco Ltd. | 0.00% | Add +13.2% | 389,126 | $1.4M |
| Arrowstreet Capital, Limited Partnership | 0.00% | Add +150.5% | 361,290 | $1.3M |
| JPMorgan Chase & Co. | 0.00% | Reduce -16.6% | 358,723 | $1.2M |
| Jane Street Group, LLC | 0.00% | Add +25.3% | 357,025 | $1.2M |
| State of Wisconsin Investment Board | 0.00% | Add +6.8% | 338,218 | $1.2M |
| New York State Common Retirement Fund | 0.00% | Reduce -84.1% | 331,190 | $1.1M |
| Ameriprise Financial Inc. | 0.00% | Reduce -20.3% | 328,623 | $1.1M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | Reduce -6.6% | 297,875 | $1.0M |
| Rhumbline Advisers | 0.00% | Reduce -0.8% | 280,367 | $973K |
| American Century Companies Inc. | 0.00% | Add +10.2% | 276,986 | $961K |
| Nuveen, LLC | 0.00% | No change | 253,808 | $881K |
| Tudor Investment Corporation | 0.01% | New | 249,812 | $867K |
| Susquehanna International Group, LLP | 0.00% | Reduce -8.9% | 192,853 | $669K |
| Legal & General Group Plc | 0.00% | Reduce -38.0% | 192,375 | $668K |
| Point72 Asset Management | 0.00% | New | 187,618 | $651K |
| FMR LLC | 0.00% | Reduce -12.1% | 180,786 | $627K |
| Two Sigma Investments, LP | 0.00% | New | 175,759 | $610K |
| Bank of America Corp. | 0.00% | Add +85.7% | 170,160 | $590K |
| Barclays PLC | 0.00% | Reduce -57.3% | 165,572 | $575K |
| Russell Investments Group, Ltd. | 0.00% | Add +473.9% | 159,513 | $554K |
| Squarepoint Ops LLC | 0.00% | Add +9.4% | 158,641 | $550K |
| Cubist Systematic Strategies, LLC | 0.01% | Add +61.5% | 156,359 | $543K |
| Ieq Capital, LLC | 0.00% | Add +10.1% | 152,823 | $530K |
| Alliancebernstein L.P. | 0.00% | Reduce -1.4% | 149,648 | $519K |
| Marshall Wace, LLP | 0.00% | Reduce -48.6% | 134,286 | $466K |
| D. E. Shaw & Co. | 0.00% | New | 121,022 | $420K |
| Voya Investment Management LLC | 0.00% | Add +202.8% | 116,014 | $403K |
| Prudential Financial Inc. | 0.00% | No change | 112,667 | $391K |
| Gsa Capital Partners LLP | 0.03% | Add +210.2% | 109,098 | $379K |
| Creative Planning | 0.00% | Add +95.1% | 108,631 | $377K |
| Numerai GP LLC | 0.05% | Reduce -74.8% | 106,495 | $370K |
| Caxton Associates LLP | 0.01% | Reduce -9.7% | 93,408 | $324K |
| PDT Partners, LLC | 0.02% | No change | 91,869 | $319K |
| Wells Fargo & Company | 0.00% | Add +19.8% | 90,401 | $314K |
| Deutsche Bank AG | 0.00% | Add +15.5% | 89,020 | $309K |
| Franklin Resources Inc. | 0.00% | Add +13.3% | 86,768 | $301K |
| Aquatic Capital Management LLC | 0.01% | Add +315.6% | 84,150 | $292K |
| Citadel Advisors | 0.00% | Reduce -86.7% | 82,304 | $286K |
| Public Employees Retirement System of Ohio | 0.00% | Add +17.7% | 81,106 | $281K |
| Thrivent Financial for Lutherans | 0.00% | Add +4.6% | 78,934 | $274K |
| XTX Topco Ltd | 0.01% | Reduce -37.1% | 72,546 | $252K |
| MetLife Investment Management, LLC | 0.00% | Reduce -4.7% | 69,880 | $242K |
| ExodusPoint Capital Management, LP | 0.00% | Reduce -73.2% | 62,970 | $219K |
| Panagora Asset Management Inc. | 0.00% | Reduce -78.3% | 62,598 | $217K |
| T. Rowe Price Associates Inc. | 0.00% | Add +9.3% | 62,135 | $216K |
| Two Sigma Advisers, LP | 0.00% | New | 61,600 | $214K |
| State of Alaska, Department of Revenue | 0.00% | Add +0.9% | 61,509 | $213K |
| SG Americas Securities, LLC | 0.00% | Add +371.3% | 59,604 | $207K |
| State of Tennessee, Department of Treasury | 0.00% | Add +138.3% | 58,883 | $204K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -14.2% | 55,255 | $192K |
| Cwm, LLC | 0.00% | Add +21.2% | 55,066 | $191K |
| Cerity Partners LLC | 0.00% | Add +1.2% | 51,989 | $180K |
| Louisiana State Employees Retirement System | 0.00% | Add +5.0% | 50,300 | $175K |
| Citigroup Inc. | 0.00% | Reduce -54.4% | 49,973 | $173K |
| Intech Investment Management LLC | 0.00% | Add +3.3% | 48,498 | $168K |
| New York State Teachers Retirement System | 0.00% | No change | 48,463 | $168K |
| Brevan Howard Capital Management LP | 0.00% | Reduce -13.9% | 47,480 | $165K |
| Manufacturers Life Insurance Company, The | 0.00% | Reduce -8.4% | 40,713 | $141K |
| Wealth Enhancement Advisory Services, LLC | 0.00% | Add +17.1% | 36,375 | $138K |
| Oxford Asset Management LLP | 0.04% | Add +196.0% | 37,509 | $130K |
| Boston Partners | 0.00% | New | 37,183 | $129K |
| Dynamic Technology Lab Private Ltd | 0.02% | Reduce -23.2% | 35,119 | $122K |
| State Board of Administration of Florida Retirement System | 0.00% | No change | 34,670 | $120K |
| Quantbot Technologies LP | 0.00% | Add +37.1% | 33,907 | $118K |
| Amalgamated Bank | 0.00% | Add +6.7% | 31,934 | $111K |
| Arax Advisory Partners | 0.00% | New | 30,259 | $105K |
| Police & Firemen's Retirement System of New Jersey | 0.00% | No change | 29,469 | $102K |
| Bailard, Inc. | 0.00% | New | 29,300 | $102K |
| Brooklyn Investment Group | 0.01% | Reduce -7.2% | 28,452 | $101K |
| Commonwealth of Pennsylvania Public School Empls Retrmt SYS | 0.00% | Add +5.8% | 27,864 | $97K |
| Yousif Capital Management, LLC | 0.00% | Reduce -11.6% | 27,581 | $96K |
| Mariner, LLC | 0.00% | Add +56.0% | 26,902 | $93K |
| Comerica Bank | 0.00% | Reduce -11.9% | 26,792 | $93K |
| STRS Ohio | 0.00% | No change | 26,200 | $91K |
| Oregon Public Employees Retirement Fund | 0.00% | Add +5.1% | 24,675 | $86K |
| Teachers Retirement System of the State of Kentucky | 0.00% | No change | 24,338 | $85K |
"% of holder's portfolio" is CTKB's weight in each manager's 13F, not the share of Cytek Biosciences Inc. the manager owns.