Security record · archived quarter
CTKB
Cytek Biosciences, Inc. · Healthcare · Medical - Devices
74Tracked holders
0Δ holders
60.52MShares held
$268.04MReported value
+6New positions
−6Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow -0.5% · net new positions 0.0% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 74 | 0 | 60.52M | $268.04M | +6 | −6 |
| Q1 2026 | 76 | +1 | 60.92M | $266.22M | +4 | −3 |
| Q4 2025 | 75 | -1 | 61.04M | $308.28M | — | −1 |
| Q3 2025 | 19 | +4 | 43.35M | $150.42M | +4 | — |
| Q2 2025 | 12 | 0 | 36.22M | $123.14M | +1 | −1 |
| Q1 2025 | 9 | 0 | 9.63M | $38.61M | +1 | −1 |
| Q4 2024 | 9 | +1 | 10.70M | $69.47M | +1 | — |
| Q3 2024 | 7 | 0 | 5.47M | $30.29M | — | — |
| Q2 2024 | 7 | — | 6.05M | $33.76M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 9.58M | -43.7% | $42.43M | 0.0% | ▼ Trim | 5 | SEC ↗ ×8 |
| 2 | Millennium Management ✦ | 9.34M | +48.4% | $41.37M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 3 | Boston Partners | 7.66M | +32.0% | $33.94M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 4 | Vanguard Capital Management Llc | 4.94M | +3.7% | $21.88M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | Geode Capital Management ✦ (passive) | 3.06M | +8.0% | $13.56M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 6 | Dimensional Fund Advisors Lp | 2.62M | -1.8% | $11.59M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 7 | State Street Global Advisors ✦ (passive) | 2.57M | -37.8% | $11.37M | 0.0% | ▼ Trim | 7 | SEC ↗ |
| 8 | Goldman Sachs Group ✦ | 2.17M | -7.6% | $9.60M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 9 | Russell Investments Group, Ltd. | 1.51M | +11.1% | $6.70M | 0.0% | ▲ Add | 3 | SEC ↗ ×13 |
| 10 | Bank Of America Corp /De/ | 1.32M | +30.4% | $5.83M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 11 | Charles Schwab Investment… | 1.07M | -2.8% | $4.75M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | Northern Trust Corp | 1.00M | -0.2% | $4.44M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 13 | Hrt Financial Lp | 997.77K | +141.0% | $4.42M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 14 | Arrowstreet Capital ✦ | 973.83K | +204.4% | $4.31M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 15 | Jane Street Group, Llc | 906.16K | New | $4.01M | 0.0% | New | 1 | SEC ↗ ×2 |
| 16 | Tudor Investment Corp Et Al | 837.91K | +161.3% | $3.71M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | AQR Capital Management ✦ | 813.97K | -10.8% | $3.61M | 0.0% | ▼ Trim | 9 | SEC ↗ ×6 |
| 18 | Citadel Advisors ✦ | 721.47K | +53.0% | $3.20M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 19 | Morgan Stanley ✦ | 701.79K | -59.2% | $3.11M | 0.0% | ▼ Trim | 4 | SEC ↗ ×7 |
| 20 | Qube Research & Technologies Ltd | 689.82K | New | $3.06M | 0.0% | New | 1 | SEC ↗ |
| 21 | Susquehanna International Group, Llp | 681.71K | +1117.1% | $3.02M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 22 | D. E. Shaw & Co. ✦ | 669.18K | +157.2% | $2.96M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 23 | Renaissance Technologies ✦ | 661.30K | -2.3% | $2.93M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 504.38K | +78.0% | $2.23M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 25 | Marshall Wace ✦ | 441.70K | New | $1.96M | 0.0% | New | 1 | SEC ↗ ×2 |
| 26 | Point72 Asset Management ✦ | 422.36K | New | $1.87M | 0.0% | New | 1 | SEC ↗ |
| 27 | Bank of New York Mellon Corp | 371.43K | -39.0% | $1.65M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 28 | American Century Companies Inc | 292.10K | +3.7% | $1.29M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 29 | Nuveen, LLC | 289.42K | +17.9% | $1.28M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 30 | Connor, Clark & Lunn Investment… | 266.94K | +10.5% | $1.18M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 31 | Bnp Paribas Financial Markets | 215.01K | +175.5% | $952,494 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 32 | Invesco Ltd. | 185.67K | -52.2% | $822,522 | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 33 | Two Sigma Investments ✦ | 168.22K | +557.1% | $745,206 | 0.0% | ▲ Add | 4 | SEC ↗ |
| 34 | Franklin Resources Inc | 156.06K | +36.9% | $691,350 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 35 | Rhumbline Advisers | 153.22K | -39.8% | $678,777 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 36 | Alliancebernstein L.P. | 141.05K | 0.0% | $616,380 | 0.0% | Held | 3 | SEC ↗ |
| 37 | JPMorgan Chase ✦ | 141.86K | -52.6% | $615,690 | 0.0% | ▼ Trim | 4 | SEC ↗ ×5 |
| 38 | Deutsche Bank Ag\ | 111.93K | +7.2% | $495,859 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 39 | Wells Fargo & Company/Mn | 102.70K | +126.8% | $454,979 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 40 | T. Rowe Price ✦ | 101.20K | +26.3% | $449,000 | 0.0% | ▲ Add | 9 | SEC ↗ |
| 41 | UBS Group AG | 88.91K | -52.4% | $393,889 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 42 | Squarepoint Ops LLC | 82.78K | +227.2% | $366,698 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 43 | Voya Investment Management Llc | 74.03K | -47.6% | $327,971 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 44 | Creative Planning | 62.55K | -30.4% | $277,119 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 45 | Quantinno Capital Management LP | 56.82K | +11.0% | $251,726 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 46 | Citigroup Inc | 56.13K | +350.7% | $248,656 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 47 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 56.02K | +1.6% | $248,155 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | Balyasny Asset Management L.P. | 54.38K | New | $240,908 | 0.0% | New | 1 | SEC ↗ |
| 49 | Wealth Enhancement Advisory… | 61.87K | -14.9% | $221,946 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 50 | Canada Pension Plan Investment Board | 41.30K | 0.0% | $182,959 | 0.0% | Held | 2 | SEC ↗ |
| 51 | New York State Common Retirement… | 34.92K | 0.0% | $154,704 | 0.0% | Held | 3 | SEC ↗ |
| 52 | State Board Of Administration Of… | 34.67K | 0.0% | $153,588 | 0.0% | Held | 3 | SEC ↗ |
| 53 | Manufacturers Life Insurance… | 33.97K | +5.5% | $150,465 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 54 | Cerity Partners LLC | 29.05K | -50.0% | $128,705 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 55 | Focus Partners Wealth | 28.20K | -16.2% | $124,948 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 56 | Mercer Global Advisors Inc /Adv | 25.72K | -11.7% | $113,931 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Prudential Financial Inc | 23.26K | -80.2% | $103,042 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | Barclays Plc | 19.61K | -18.8% | $86,853 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 59 | Hsbc Holdings Plc | 19.73K | New | $85,744 | 0.0% | New | 1 | SEC ↗ |
| 60 | ProShare Advisors LLC | 15.93K | -12.6% | $70,549 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | Ameriprise Financial Inc | 14.13K | -92.5% | $62,578 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 62 | Victory Capital Management Inc | 13.65K | -22.5% | $60,492 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 63 | Captrust Financial Advisors | 13.07K | -20.5% | $57,891 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 64 | Legal & General Group Plc | 11.81K | -93.5% | $52,318 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | Federated Hermes, Inc. | 6.08K | +13.9% | $26,926 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 66 | Royal Bank Of Canada | 4.38K | +90.3% | $19,000 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 67 | Rockefeller Capital Management L.P. | 2.42K | -53.5% | $10,712 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 68 | Pnc Financial Services Group, Inc. | 2.02K | -88.7% | $8,958 | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 69 | Fifth Third Bancorp | 1.45K | -94.2% | $6,432 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 70 | UBS AM, a distinct business unit of… | 582 | 0.0% | $2,578 | 0.0% | Held | 3 | SEC ↗ |
| 71 | Us Bancorp \De\ | 536 | -3.8% | $2,374 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 72 | Jones Financial Companies Lllp | 254 | 0.0% | $1,138 | 0.0% | Held | 3 | SEC ↗ |
| 73 | Group One Trading Llc | 250 | -88.6% | $1,108 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 74 | Osaic Holdings, Inc. | 185 | -83.8% | $819 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Jane Street Group, Llc | $4.01M | 0.0% |
| Qube Research & Technologies… | $3.06M | 0.0% |
| Marshall Wace | $1.96M | 0.0% |
| Point72 Asset Management | $1.87M | 0.0% |
| Balyasny Asset Management L.P. | $240,908 | 0.0% |
| Hsbc Holdings Plc | $85,744 | 0.0% |
Exited
| Principal Financial Group Inc | $2.34M | was 0.0% |
| State Of Wisconsin Investment… | $454,681 | was 0.0% |
| Mariner, LLC | $77,824 | was 0.0% |
| Neuberger Berman Group LLC | $49,071 | was 0.0% |
| Simplex Trading, Llc | $14,097 | was 0.0% |
| Optiver Holding B.V. | $13,875 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 164 holders, 84.77M shares, $364.62M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Aug 06
SC 13G/A — MILLENNIUM MANAGEMENT LLC
Aug 04
SC 13G — Boston Partners
Jul 08
SC 13G/A — BlackRock, Inc.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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