Cytek Biosciences Inc
Ownership
Ownership Structure
Who owns Cytek Biosciences Inc (CTKB)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 79.2% of the shares are freely tradable; institutional investors hold 67.6%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 7.37 | 9,578,643 | -43.7 | 06/30/2026 |
| Millennium Management LLC | 7.18 | 9,338,010 | +48.4 | 06/30/2026 |
| Boston Partners Global Investors, Inc | 5.89 | 7,660,943 | +32.0 | 06/30/2026 |
| Hillhouse Capital Advisors, Ltd. | 5.12 | 6,657,030 | +0.0 | 06/30/2026 |
| Topline Capital Management LLC | 4.83 | 6,283,450 | -11.1 | 06/30/2026 |
| Vanguard Capital Management, LLC | 3.80 | 4,939,597 | +3.7 | 06/30/2026 |
| Geode Capital Management, LLC | 2.35 | 3,059,573 | +8.0 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 2.01 | 2,616,257 | -1.8 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.71 | 3,525,848 | +0.0 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.38 | 3,094,777 | -0.4 | 10/29/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Jiang Wenbin | PRESIDENT AND CEO | 5,561,029 | 32,253,968 $ | Aug 18, 2026 | direct |
| Yan Ming | CHIEF TECHNOLOGY OFFICER | 4,821,870 | 27,966,846 $ | Aug 18, 2026 | direct |
| McCombe William D. | Chief Financial Officer | 134,693 | 781,219 $ | Aug 18, 2026 | direct |
| Holder Michael | Director | 62,875 | 364,675 $ | Aug 18, 2026 | direct |
| Chin Richard | Director | 28,499 | 165,294 $ | Aug 18, 2026 | direct |
| Muir Glenn P | Director | 3,086 | 17,899 $ | Aug 18, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 5,401 | 4.67 | 25,223 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 16,049 | – | – |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 4,392 | 4.67 | 20,511 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 13,051 | – | – |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 2,111 | 4.67 | 9,858 |
| Aug 18, 2026 | McCombe William D. | Chief Financial Officer | Other | 6,320 | – | – |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 3,463 | 4.67 | 16,172 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 14,220 | – | – |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 1,501 | 4.67 | 7,010 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 6,162 | – | – |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 1,346 | 4.67 | 6,286 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 5,525 | – | – |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 1,778 | 4.67 | 8,303 |
| Aug 18, 2026 | Yan Ming | CHIEF TECHNOLOGY OFFICER | Other | 7,363 | – | – |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 20,956 | 4.67 | 97,865 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 57,212 | – | – |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 7,062 | 4.67 | 32,980 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 29,002 | – | – |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 5,382 | 4.67 | 25,134 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 22,100 | – | – |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 2,869 | 4.67 | 13,398 |
| Aug 18, 2026 | Jiang Wenbin | PRESIDENT AND CEO | Other | 11,781 | – | – |
| Aug 18, 2026 | Holder Michael | Director | Other | 2,181 | – | – |
| Aug 18, 2026 | Chin Richard | Director | Other | 6,107 | – | – |
| Aug 18, 2026 | Muir Glenn P | Director | Other | 3,086 | – | – |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.