Security record · archived quarter
CTKB
Cytek Biosciences, Inc. · Healthcare · Medical - Devices
76Tracked holders
+1Δ holders
60.92MShares held
$266.22MReported value
+4New positions
−3Exits
Momentum inputs (comparable managers):
holder breadth +1.3% ·
share flow +4.4% ·
net new positions +1.3%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 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 · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 17.01M | -1.0% | $74.32M | 0.0% | ▼ Trim | 4 | SEC ↗ ×8 |
| 2 | Millennium Management ✦ | 6.29M | +32.4% | $27.50M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 3 | Boston Partners | 5.80M | +15.9% | $25.36M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | Vanguard Capital Management Llc | 4.76M | — | $20.81M | 0.0% | n/c | 1 | SEC ↗ |
| 5 | State Street Global Advisors ✦ (passive) | 4.12M | -0.6% | $18.02M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 6 | Geode Capital Management ✦ (passive) | 2.83M | +1.6% | $12.39M | 0.0% | ▲ Add | 8 | SEC ↗ ×2 |
| 7 | Dimensional Fund Advisors Lp | 2.66M | +0.6% | $11.64M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 8 | Goldman Sachs Group ✦ | 2.34M | +31.0% | $10.25M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 9 | Morgan Stanley ✦ | 1.72M | +1.1% | $7.51M | 0.0% | ▲ Add | 3 | SEC ↗ ×7 |
| 10 | Russell Investments Group, Ltd. | 1.36M | +35.8% | $5.94M | 0.0% | ▲ Add | 2 | SEC ↗ ×14 |
| 11 | Charles Schwab Investment… | 1.10M | +0.9% | $4.83M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 12 | Bank Of America Corp /De/ | 1.01M | +17.9% | $4.41M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 13 | Northern Trust Corp | 1.01M | +5.0% | $4.39M | 0.0% | ▲ Add | 2 | SEC ↗ ×5 |
| 14 | AQR Capital Management ✦ | 912.34K | +22.7% | $3.99M | 0.0% | ▲ Add | 8 | SEC ↗ ×7 |
| 15 | Renaissance Technologies ✦ | 676.70K | +0.2% | $2.96M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 16 | Bank of New York Mellon Corp | 608.65K | -4.6% | $2.66M | 0.0% | ▼ Trim | 2 | SEC ↗ ×6 |
| 17 | Principal Financial Group Inc | 534.76K | -19.8% | $2.34M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 18 | Citadel Advisors ✦ | 471.39K | +182.7% | $2.06M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 19 | Hrt Financial Lp | 414.05K | -5.4% | $1.81M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 20 | Invesco Ltd. | 388.23K | -2.6% | $1.70M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 21 | Tudor Investment Corp Et Al | 320.71K | New | $1.40M | 0.0% | New | 1 | SEC ↗ |
| 22 | Arrowstreet Capital ✦ | 319.91K | -11.6% | $1.40M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | JPMorgan Chase ✦ | 299.09K | -9.1% | $1.29M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 24 | Fidelity (FMR) ✦ | 283.39K | +21.1% | $1.24M | 0.0% | ▲ Add | 4 | SEC ↗ ×2 |
| 25 | American Century Companies Inc | 281.68K | -1.0% | $1.23M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | D. E. Shaw & Co. ✦ | 260.12K | -1.1% | $1.14M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 27 | Rhumbline Advisers | 254.59K | +1.9% | $1.11M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 28 | Nuveen, LLC | 245.52K | -3.3% | $1.07M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 29 | Connor, Clark & Lunn Investment… | 241.50K | -18.3% | $1.06M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 30 | Ameriprise Financial Inc | 187.27K | -7.4% | $818,370 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 31 | UBS Group AG | 186.88K | -59.4% | $816,670 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 32 | Legal & General Group Plc | 182.86K | -3.0% | $799,098 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 33 | Alliancebernstein L.P. | 141.05K | 0.0% | $712,292 | 0.0% | Held | 2 | SEC ↗ |
| 34 | Voya Investment Management Llc | 141.38K | +44.5% | $617,852 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Prudential Financial Inc | 117.60K | +10.1% | $513,899 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | Franklin Resources Inc | 113.97K | +1000.4% | $498,062 | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 37 | Deutsche Bank Ag\ | 104.44K | +12.1% | $456,390 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 38 | State Of Wisconsin Investment Board | 104.05K | -38.3% | $454,681 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 39 | Creative Planning | 89.94K | -25.8% | $393,025 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 40 | T. Rowe Price ✦ | 80.14K | +14.8% | $351,000 | 0.0% | ▲ Add | 8 | SEC ↗ |
| 41 | Bnp Paribas Financial Markets | 78.04K | -26.6% | $341,052 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 42 | Cwm, Llc | 60.72K | +15.4% | $265,364 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 43 | Wealth Enhancement Advisory… | 72.70K | +103.5% | $260,403 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Cerity Partners LLC | 58.12K | +17.4% | $253,998 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 45 | Susquehanna International Group, Llp | 56.01K | +16.4% | $244,764 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 55.15K | +1.0% | $240,984 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Quantinno Capital Management LP | 51.21K | +72.7% | $223,796 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Wells Fargo & Company/Mn | 45.28K | -65.9% | $197,860 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 49 | Canada Pension Plan Investment Board | 41.30K | New | $180,481 | 0.0% | New | 1 | SEC ↗ |
| 50 | New York State Common Retirement… | 34.92K | 0.0% | $152,609 | 0.0% | Held | 2 | SEC ↗ |
| 51 | State Board Of Administration Of… | 34.67K | 0.0% | $151,508 | 0.0% | Held | 2 | SEC ↗ |
| 52 | Focus Partners Wealth | 33.68K | +0.5% | $147,170 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | Manufacturers Life Insurance… | 32.20K | -9.6% | $140,710 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 54 | Mercer Global Advisors Inc /Adv | 29.11K | +34.0% | $127,233 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 55 | Two Sigma Investments ✦ | 25.60K | -14.8% | $111,872 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 56 | Squarepoint Ops LLC | 25.30K | New | $110,544 | 0.0% | New | 1 | SEC ↗ |
| 57 | Fifth Third Bancorp | 24.91K | +2631.2% | $108,853 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | Barclays Plc | 24.14K | -86.8% | $105,505 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 59 | ProShare Advisors LLC | 18.22K | -19.9% | $79,604 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 60 | Pnc Financial Services Group, Inc. | 17.93K | +9.7% | $78,341 | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 61 | Mariner, LLC | 17.81K | -4.1% | $77,824 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 62 | Victory Capital Management Inc | 17.62K | 0.0% | $77,004 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 63 | Captrust Financial Advisors | 16.43K | +17.0% | $71,812 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | Citigroup Inc | 12.45K | -43.8% | $54,424 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 65 | Neuberger Berman Group LLC | 11.23K | -9.5% | $49,071 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 66 | California State Teachers… | 6.36K | -12.1% | $27,802 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 67 | Federated Hermes, Inc. | 5.33K | +16.5% | $23,314 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | Rockefeller Capital Management L.P. | 5.20K | +406.7% | $22,720 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 69 | Simplex Trading, Llc | 3.23K | +61.1% | $14,097 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Optiver Holding B.V. | 3.17K | New | $13,875 | 0.0% | New | 1 | SEC ↗ |
| 71 | Royal Bank Of Canada | 2.30K | -58.4% | $10,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 72 | Group One Trading Llc | 2.20K | +46.7% | $9,614 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 73 | Osaic Holdings, Inc. | 1.14K | +876.1% | $4,991 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 74 | UBS AM, a distinct business unit of… | 582 | -30.1% | $2,543 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 75 | Us Bancorp \De\ | 557 | +22.7% | $2,434 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 76 | Jones Financial Companies Lllp | 254 | 0.0% | $1,097 | 0.0% | Held | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Tudor Investment Corp Et Al | $1.40M | 0.0% |
| Canada Pension Plan… | $180,481 | 0.0% |
| Squarepoint Ops LLC | $110,544 | 0.0% |
| Optiver Holding B.V. | $13,875 | 0.0% |
Exited
| Wellington Management | $3.86M | was 0.0% |
| Point72 Asset Management | $576,993 | was 0.0% |
| Jane Street Group, Llc | $397,728 | 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: Q1 2026 ·
Methodology ·
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