CYTEK BIOSCIENCES INC (CTKB)
Institutional ownership reported to the SEC as of Q2 2026, across 20 quarters.
149
Reporting holders
$354.3M
Reported value
61.5%
Of shares outstanding
0.0%
Held as options
-2
Holder change
Institutions report 80,003,505 shares against 129,983,253 outstanding. Shares only - option lines are excluded, which is why this can be compared with the company at all. The count comes from the cover page of the company's own most recent report, so it is dated when that was filed rather than at quarter end.
Options share is the part of reported value carried in derivative lines rather than shares. A high figure means institutions are expressing a view on this security without owning much of it.
Holders
| Filer | Value | Shares | Their book | Held | Change |
|---|---|---|---|---|---|
| BlackRock, Inc. | $42.4M | 9,578,643 | 0.00% | 8q | -43.7%-$32.9M |
| MILLENNIUM MANAGEMENT LLC | $41.4M | 9,338,010 | 0.01% | 10q | +48.4%+$13.5M |
| Boston Partners | $33.9M | 7,660,943 | 0.03% | 4q | +32.0%+$8.2M |
| HHLR ADVISORS, LTD. | $29.5M | 6,657,030 | 3.54% | 20q | HELD |
| Topline Capital Management, LLC | $27.8M | 6,283,450 | 7.22% | 7q | -11.1%-$3.5M |
| VANGUARD CAPITAL MANAGEMENT LLC | $21.9M | 4,939,597 | 0.00% | 2q | +3.7%+$782.8K |
| GEODE CAPITAL MANAGEMENT, LLC | $13.6M | 3,059,573 | 0.00% | 20q | +8.0%+$999.7K |
| DIMENSIONAL FUND ADVISORS LP | $11.6M | 2,616,257 | 0.00% | 14q | -1.8%-$208.5K |
| STATE STREET CORP | $11.4M | 2,566,121 | 0.00% | 20q | -37.8%-$6.9M |
| GOLDMAN SACHS GROUP INC | $9.6M | 2,167,515 | 0.00% | 20q | -7.6%-$785.1K |
| ROYCE & ASSOCIATES LP | $9.2M | 2,081,579 | 0.07% | 10q | +26.7%+$1.9M |
| Russell Investments Group, Ltd. | $6.7M | 1,511,315 | 0.01% | 11q | +11.1%+$670.8K |
| BANK OF AMERICA CORP /DE/ | $5.8M | 1,315,332 | 0.00% | 20q | +30.4%+$1.4M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | $5.1M | 1,141,592 | 0.00% | 2q | -50.6%-$5.2M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $4.8M | 1,073,253 | 0.00% | 20q | -2.8%-$138.9K |
| Sixth Street Partners Management Company, L.P. | $4.8M | 1,073,253 | 0.00% | new | NEW |
| NORTHERN TRUST CORP | $4.4M | 1,003,294 | 0.00% | 20q | HELD |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $4.3M | 973,833 | 0.00% | 6q | +204.4%+$2.9M |
| JANE STREET GROUP, LLC | $4.0M | 906,162 | 0.00% | new | NEW |
| TUDOR INVESTMENT CORP ET AL | $3.7M | 837,913 | 0.01% | 2q | +161.3%+$2.3M |
| AQR CAPITAL MANAGEMENT LLC | $3.6M | 813,971 | 0.00% | 13q | -10.8%-$435.8K |
| VANGUARD FIDUCIARY TRUST CO | $3.3M | 740,662 | 0.00% | 2q | +3.3%+$104.8K |
| CITADEL ADVISORS LLC | $3.2M | 721,470 | 0.00% | 9q | +53.1%+$1.1M |
| MORGAN STANLEY | $3.1M | 701,792 | 0.00% | 20q | -59.2%-$4.5M |
| Qube Research & Technologies Ltd | $3.1M | 689,821 | 0.00% | new | NEW |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | $3.0M | 681,705 | 0.00% | 16q | +1117.1%+$2.8M |
| D. E. Shaw & Co., Inc. | $3.0M | 669,182 | 0.00% | 4q | +157.3%+$1.8M |
| RENAISSANCE TECHNOLOGIES LLC | $2.9M | 661,300 | 0.00% | 9q | -2.3%-$68.2K |
| FMR LLC | $2.2M | 504,385 | 0.00% | 20q | +78.0%+$979.0K |
| MARSHALL WACE, LLP | $2.0M | 441,704 | 0.00% | new | NEW |
| Point72 Asset Management, L.P. | $1.9M | 422,361 | 0.00% | new | NEW |
| Jain Global LLC | $1.8M | 411,465 | 0.01% | new | NEW |
| Bank of New York Mellon Corp | $1.6M | 371,427 | 0.00% | 20q | -39.0%-$1.1M |
| AMERICAN CENTURY COMPANIES INC | $1.3M | 292,103 | 0.00% | 11q | +3.7%+$46.2K |
| Nuveen, LLC | $1.3M | 289,415 | 0.00% | 6q | +17.9%+$194.5K |
| Connor, Clark & Lunn Investment Management Ltd. | $1.2M | 266,938 | 0.00% | 12q | +10.5%+$112.7K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | $1.1M | 241,581 | 0.00% | 6q | -6.1%-$69.6K |
| BNP PARIBAS FINANCIAL MARKETS | $952.5K | 215,010 | 0.00% | 7q | +175.5%+$606.8K |
| Y-Intercept (Hong Kong) Ltd | $855.6K | 193,128 | 0.02% | new | NEW |
| Invesco Ltd. | $822.5K | 185,671 | 0.00% | 18q | -52.2%-$897.3K |
| TWO SIGMA INVESTMENTS, LP | $745.2K | 168,218 | 0.00% | 4q | +557.1%+$631.8K |
| Numerai GP LLC | $706.4K | 159,465 | 0.06% | 5q | +41.8%+$208.2K |
| FRANKLIN RESOURCES INC | $691.4K | 156,061 | 0.00% | 8q | +36.9%+$186.4K |
| RHUMBLINE ADVISERS | $678.8K | 153,225 | 0.00% | 20q | -39.8%-$449.0K |
| CenterBook Partners LP | $660.9K | 149,180 | 0.03% | 2q | -79.6%-$2.6M |
| Jump Financial, LLC | $656.0K | 148,083 | 0.01% | 2q | +412.5%+$528.0K |
| XTX Topco Ltd | $632.3K | 142,723 | 0.01% | new | NEW |
| ALLIANCEBERNSTEIN L.P. | $616.4K | 141,048 | 0.00% | 18q | HELD |
| JPMORGAN CHASE & CO | $615.7K | 141,864 | 0.00% | 20q | -52.6%-$682.4K |
| DEUTSCHE BANK AG\ | $495.9K | 111,932 | 0.00% | 20q | +7.2%+$33.2K |
| WELLS FARGO & COMPANY/MN | $455.0K | 102,704 | 0.00% | 20q | +13.4%+$53.8K |
| IEQ CAPITAL, LLC | $399.1K | 90,100 | 0.00% | 6q | -37.6%-$240.5K |
| UBS Group AG | $393.9K | 88,914 | 0.00% | 17q | -52.4%-$434.0K |
| PDT Partners, LLC | $384.8K | 86,869 | 0.02% | 6q | HELD |
| Squarepoint Ops LLC | $366.7K | 82,776 | 0.00% | 2q | +227.2%+$254.6K |
| Aquatic Capital Management LLC | $340.1K | 76,762 | 0.01% | new | NEW |
| VOYA INVESTMENT MANAGEMENT LLC | $328.0K | 74,034 | 0.00% | 17q | -47.6%-$298.4K |
| MetLife Investment Management, LLC | $304.3K | 68,692 | 0.00% | 20q | +6.5%+$18.5K |
| Creative Planning | $277.1K | 62,555 | 0.00% | 6q | -30.4%-$121.3K |
| Catalyst Funds Management Pty Ltd | $276.9K | 62,500 | 0.02% | new | NEW |
| LOS ANGELES CAPITAL MANAGEMENT LLC | $275.4K | 62,160 | 0.00% | new | NEW |
| Quantinno Capital Management LP | $251.7K | 56,823 | 0.00% | 3q | +11.0%+$24.9K |
| CITIGROUP INC | $248.7K | 56,130 | 0.00% | 20q | +350.7%+$193.5K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $248.2K | 56,017 | 0.00% | 9q | +1.6%+$3.9K |
| Balyasny Asset Management L.P. | $240.9K | 54,381 | 0.00% | new | NEW |
| MERCER GLOBAL ADVISORS INC /ADV | $227.9K | 51,436 | 0.00% | 4q | +76.7%+$98.9K |
| WEALTH ENHANCEMENT ADVISORY SERVICES, LLC | $221.9K | 61,873 | 0.00% | 6q | -14.9%-$38.8K |
| Louisiana State Employees Retirement System | $213.3K | 48,800 | 0.00% | 13q | HELD |
| PRELUDE CAPITAL MANAGEMENT, LLC | $200.5K | 45,259 | 0.01% | 3q | +242.9%+$142.0K |
| Vanguard Global Advisers, LLC | $200.3K | 45,212 | 0.00% | 2q | HELD |
| CANADA PENSION PLAN INVESTMENT BOARD | $183.0K | 41,300 | 0.00% | 2q | HELD |
| Police & Firemen's Retirement System of New Jersey | $176.9K | 39,936 | 0.00% | 7q | +35.5%+$46.4K |
| Campbell & CO Investment Adviser LLC | $174.2K | 39,333 | 0.01% | new | NEW |
| ExodusPoint Capital Management, LP | $160.1K | 36,140 | 0.00% | new | NEW |
| R Squared Ltd | $156.9K | 35,412 | 0.08% | new | NEW |
| NEW YORK STATE COMMON RETIREMENT FUND | $154.7K | 34,922 | 0.00% | 20q | HELD |
| STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM | $153.6K | 34,670 | 0.00% | 17q | HELD |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | $150.5K | 33,965 | 0.00% | 19q | +5.5%+$7.8K |
| STRS OHIO | $141.8K | 32,000 | 0.00% | 8q | +22.1%+$25.7K |
| Cerity Partners LLC | $128.7K | 29,053 | 0.00% | 5q | -50.0%-$128.8K |
| AXQ CAPITAL, LP | $125.4K | 28,299 | 0.01% | 3q | +43.6%+$38.1K |
| Focus Partners Wealth | $124.9K | 28,205 | 0.00% | 4q | -16.2%-$24.2K |
| INTECH INVESTMENT MANAGEMENT LLC | $113.6K | 25,633 | 0.00% | 8q | HELD |
| Arax Advisory Partners | $105.4K | 23,786 | 0.00% | 4q | +10662.9%+$104.4K |
| PRUDENTIAL FINANCIAL INC | $103.0K | 23,260 | 0.00% | 13q | -80.2%-$417.9K |
| EntryPoint Capital, LLC | $101.3K | 22,871 | 0.02% | new | NEW |
| Laurion Capital Management LP | $98.6K | 22,263 | 0.00% | new | NEW |
| Quadrature Capital Ltd | $94.9K | 21,420 | 0.00% | new | NEW |
| BAILARD, INC. | $88.2K | 19,900 | 0.00% | 4q | HELD |
| State of Tennessee, Department of Treasury | $87.8K | 19,809 | 0.00% | 13q | -13.5%-$13.7K |
| BARCLAYS PLC | $86.9K | 19,606 | 0.00% | 18q | -18.8%-$20.1K |
| HSBC HOLDINGS PLC | $85.7K | 19,734 | 0.00% | new | NEW |
| ProShare Advisors LLC | $70.5K | 15,925 | 0.00% | 18q | -12.6%-$10.1K |
| Tower Research Capital LLC (TRC) | $69.1K | 15,594 | 0.00% | 20q | +52.3%+$23.7K |
| ALGERT GLOBAL LLC | $66.0K | 14,895 | 0.00% | 2q | -82.5%-$311.1K |
| NorthCrest Asset Manangement, LLC | $63.9K | 13,923 | 0.00% | 15q | -8.5%-$5.9K |
| AMERIPRISE FINANCIAL INC | $62.6K | 14,126 | 0.00% | 17q | -96.2%-$1.6M |
| Aigen Investment Management, LP | $62.1K | 14,029 | 0.02% | new | NEW |
| VICTORY CAPITAL MANAGEMENT INC | $60.5K | 13,655 | 0.00% | 14q | -22.5%-$17.6K |
| CAPTRUST FINANCIAL ADVISORS | $57.9K | 13,068 | 0.00% | 5q | -20.5%-$14.9K |
Five percent filings
Anyone crossing 5% of a company must say so within days - far sooner than the next quarterly holdings report. A 13D declares an intent to influence the company; a 13G is the passive version. See all activist filings →
| Filed | Form | Filer | % of class |
|---|---|---|---|
| 2026-08-06 | 13G/A | Millennium Management LLCwith 3 co-filers | 7.2% |
| 2026-08-04 | 13G | Boston Partners | 5.9% |
| 2026-07-08 | 13G/A | BlackRock, Inc. | 7.2% |
Quarter by quarter
Coverage begins with the quarter ending 2018-12-31. Earlier filings exist only as occasional late amendments, too sparse to describe a market, so they are not shown.
| Quarter | Holders | Value | Shares | New | Added | Trimmed | Options |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 149 | $354.3M | 80,003,505 | 31 | 40 | 59 | 0.0% |
| Q1 2026 | 151 | $367.2M | 84,042,009 | 18 | 64 | 42 | 0.0% |
| Q4 2025 | 142 | $406.5M | 80,489,422 | 17 | 43 | 57 | 0.0% |
| Q3 2025 | 140 | $274.8M | 79,190,956 | 17 | 53 | 51 | 0.0% |
| Q2 2025 | 143 | $266.6M | 78,773,215 | 21 | 58 | 42 | 0.0% |
| Q1 2025 | 146 | $308.3M | 77,294,927 | 24 | 43 | 59 | 0.0% |
| Q4 2024 | 140 | $497.0M | 76,926,947 | 24 | 50 | 36 | 0.0% |
| Q3 2024 | 123 | $415.1M | 75,253,848 | 19 | 54 | 29 | 0.0% |
| Q2 2024 | 112 | $425.3M | 76,517,240 | 14 | 49 | 35 | 0.0% |
| Q1 2024 | 112 | $550.3M | 82,077,642 | 22 | 35 | 29 | 0.1% |
| Q4 2023 | 92 | $725.3M | 79,617,839 | 12 | 38 | 24 | 0.0% |
| Q3 2023 | 96 | $423.1M | 76,579,610 | 15 | 45 | 21 | 0.1% |
| Q2 2023 | 91 | $654.4M | 76,489,889 | 22 | 42 | 17 | 0.2% |
| Q1 2023 | 84 | $603.1M | 65,588,696 | 11 | 29 | 27 | 0.1% |
| Q4 2022 | 86 | $610.4M | 59,683,948 | 21 | 31 | 16 | 0.3% |
| Q3 2022 | 88 | $902.0M | 61,055,686 | 16 | 36 | 19 | 0.4% |
| Q2 2022 | 83 | $567.8M | 52,913,231 | 26 | 36 | 15 | 0.0% |
| Q1 2022 | 72 | $514.5M | 47,713,134 | 27 | 33 | 9 | 0.0% |
| Q4 2021 | 51 | $571.9M | 35,038,930 | 10 | 20 | 9 | 0.0% |
| Q3 2021 | 53 | $744.4M | 34,351,997 | 53 | 0 | 0 | 0.0% |