CTKBNasdaqLaboratory Analytical InstrumentsFiscal year ends December 31
Cytek Biosciences, Inc.
Financials through Q2 FY2026, quarter ended Jun 30, 2026Last filing: 10-Q on Aug 5, 2026
$5.25+0.00 (0.00%)
Close on Oct 19, 2026
- Market cap
- $679.67M
- P/E (TTM)
- –
- Dividend yield
- –
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
62.7%
82M of 130M shares
Institutional holders
155
29 new, 37 sold out
Net institutional buying
-3M
In Q2 2026
Insider trades, 12 months
0 buys · 0 sales
Open-market trades only
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| BlackRock, Inc. | 9,356,551 | 7.20% | 13G (passive) amendment | Jun 30, 2026 |
| Israel A. Englander | 9,338,010 | 7.20% | 13G (passive) amendment | Jun 30, 2026 |
| Millennium Group Management LLC | 7,872,900 | 6.10% | 13G (passive) amendment | May 11, 2026 |
| Boston Partners | 7,635,145 | 5.91% | 13G (passive) | Jun 30, 2026 |
| Collin McBirney | 6,780,847 | 5.30% | 13G (passive) | Sep 25, 2025 |
| Hillhouse Investment Management, Ltd. | 6,657,030 | 5.10% | 13G (passive) | Sep 30, 2024 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CTKB | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 9,578,643 | 7.37% | $42.43M | −7,428,626 | 0.00% |
| Millennium Management LLC | 9,338,010 | 7.18% | $41.37M | +3,046,212 | 0.01% |
| Boston Partners | 7,660,943 | 5.89% | $33.94M | +1,858,170 | 0.03% |
| Hhlr Advisors, Ltd. | 6,657,030 | 5.12% | $29.49M | – | 3.54% |
| Topline Capital Management, LLC | 6,283,450 | 4.83% | $27.84M | −781,031 | 7.22% |
| Vanguard Capital Management LLC | 4,939,597 | 3.80% | $21.88M | +176,693 | 0.00% |
| Geode Capital Management, LLC | 3,059,573 | 2.35% | $13.56M | +225,618 | 0.00% |
| Dimensional Fund Advisors LP | 2,616,257 | 2.01% | $11.59M | −47,072 | 0.00% |
| State Street Corp | 2,566,121 | 1.97% | $11.37M | −1,557,627 | 0.00% |
| Goldman Sachs Group Inc | 2,167,515 | 1.67% | $9.60M | −177,220 | 0.00% |
| Royce & Associates LP | 2,081,579 | 1.60% | $9.22M | +439,211 | 0.07% |
| Russell Investments Group, Ltd. | 1,511,315 | 1.16% | $6.70M | +151,415 | 0.01% |
| Acadian Asset Management LLC | 1,376,048 | 1.06% | $6.09K | +977,060 | 0.01% |
| Bank Of America Corp /De/ | 1,315,332 | 1.01% | $5.83M | +306,278 | 0.00% |
| Vanguard Portfolio Management LLC | 1,141,592 | 0.88% | $5.06M | −1,170,266 | 0.00% |
| Charles Schwab Investment Management Inc | 1,073,253 | 0.83% | $4.75M | −31,348 | 0.00% |
| Northern Trust Corp | 1,003,294 | 0.77% | $4.44M | −1,899 | 0.00% |
| Hrt Financial LP | 997,769 | 0.77% | $4.42K | +583,717 | 0.00% |
| Arrowstreet Capital, Limited Partnership | 973,833 | 0.75% | $4.31M | +653,924 | 0.00% |
| Jane Street Group, LLC | 906,162 | 0.70% | $4.01M | New | 0.00% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 155 | 82M | 62.7% | 29 / 45 | 65 / 37 | 15M | 19M |
| Q1 2026 | 165 | 85M | 65.4% | 24 / 68 | 51 / 11 | 14M | 4M |
| Q4 2025 | 155 | 82M | 63.1% | 21 / 52 | 61 / 15 | 11M | 10M |
| Q3 2025 | 153 | 80M | 61.8% | 20 / 63 | 52 / 24 | 11M | 10M |
| Q2 2025 | 158 | 79M | 61.1% | 25 / 65 | 47 / 27 | 10M | 8M |
| Q1 2025 | 160 | 78M | 59.7% | 30 / 50 | 64 / 21 | 9M | 8M |
| Q4 2024 | 152 | 77M | 59.4% | 32 / 56 | 43 / 16 | 6M | 4M |
| Q3 2024 | 136 | 76M | 58.1% | 20 / 66 | 32 / 12 | 21M | 5M |
| Q2 2024 | 129 | 77M | 59.1% | 21 / 55 | 41 / 16 | 6M | 12M |
| Q1 2024 | 125 | 82M | 63.4% | 24 / 43 | 36 / 4 | 4M | 1M |
| Q4 2023 | 105 | 80M | 61.5% | 18 / 44 | 29 / 19 | 6M | 3M |
| Q3 2023 | 106 | 77M | 59.6% | 18 / 54 | 23 / 13 | 9M | 8M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of CTKB | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 3,525,848 | 2.71% | $15.62M | 0.00% | Jun 30, 2026 |
| iShares Russell 2000 ETF | 3,164,683 | 2.43% | $14.02M | 0.02% | Jun 30, 2026 |
| Column Small Cap Select Fund | 2,378,955 | 1.83% | $9.97M | 0.53% | May 31, 2026 |
| Fidelity Small Cap Index Fund | 1,329,842 | 1.02% | $5.61M | 0.02% | Jul 31, 2026 |
| Vanguard Extended Market Index Fund | 1,300,320 | 1.00% | $5.76M | 0.01% | Jun 30, 2026 |
| iShares Russell 2000 Value ETF | 1,107,950 | 0.85% | $4.91M | 0.03% | Jun 30, 2026 |
| WPG Partners Select Small Cap Value Fund | 945,719 | 0.73% | $3.96M | 1.69% | May 31, 2026 |
| iShares Biotechnology ETF | 833,257 | 0.64% | $3.69M | 0.04% | Jun 30, 2026 |
| Goldman Sachs Small Cap Value Insights Fund | 639,133 | 0.49% | $2.70M | 0.20% | Jul 31, 2026 |
| Vanguard Russell 2000 Index Fund | 602,711 | 0.46% | $2.53M | 0.01% | May 31, 2026 |
| Royce Micro-Cap Fund | 572,392 | 0.44% | $2.54M | 0.59% | Jun 30, 2026 |
| Fidelity Extended Market Index Fund | 567,467 | 0.44% | $2.38M | 0.01% | May 31, 2026 |
| U.S. Small Cap Portfolio | 566,763 | 0.44% | $2.39M | 0.01% | Jul 31, 2026 |
| Schwab U.S. Small-Cap ETF | 529,904 | 0.41% | $2.22M | 0.01% | May 31, 2026 |
| Fidelity Enhanced Small Cap Core ETF | 493,884 | 0.38% | $2.19M | 0.04% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Ming Yan | CHIEF TECHNOLOGY OFFICER, Director | 4,821,870 | 3.71% | Aug 20, 2026 |
| Wenbin Jiang | PRESIDENT AND CEO, Director | 8,248,585 | 6.35% | Aug 20, 2026 |
| William D. McCombe | Chief Financial Officer | 115,386 | 0.09% | Aug 20, 2026 |
| Ilan Feuchtwang | Chief Legal Officer, Secretary | – | – | Aug 12, 2026 |
| Valerie Barnett | CHIEF LEGAL OFFICER | 139,315 | 0.11% | May 20, 2026 |
| Philippe Busque | SVP, GLOBAL SALES AND SERVICES | 36,711 | 0.03% | May 20, 2026 |
| Allen Poirson | SVP BUS. AND CORP. DEV. | 59,981 | 0.05% | Nov 20, 2024 |
| Richard Chin | Director | 28,499 | 0.02% | Aug 20, 2026 |
| Michael Holder | Director | 62,875 | 0.05% | Aug 20, 2026 |
| Glenn P. Muir | Director | 3,086 | 0.00% | Aug 20, 2026 |
| Jack Ball | Director | 86,678 | 0.07% | Jun 12, 2026 |
| Deborah J. Neff | Director | 59,679 | 0.05% | Jun 12, 2026 |
| Vera Imper | Director | 59,679 | 0.05% | Jun 12, 2026 |
| Don M. Hardison | Director | 15,706 | 0.01% | Jun 9, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Tax withholding | −2,111 | $4.67 | $9.86K | 115,386 |
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Option exercise | +6,320 | – | – | 117,497 |
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Tax withholding | −4,392 | $4.67 | $20.51K | 124,045 |
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Option exercise | +16,049 | – | – | 140,094 |
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Tax withholding | −5,401 | $4.67 | $25.22K | 134,693 |
| William D. McCombe Chief Financial Officer | Aug 18, 2026 | Option exercise | +13,051 | – | – | 128,437 |
| Glenn P. Muir Director | Aug 18, 2026 | Option exercise | +3,086 | – | – | 3,086 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Tax withholding | −3,463 | $4.67 | $16.17K | 4,821,870 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Option exercise | +14,220 | – | – | 4,825,333 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Tax withholding | −1,501 | $4.67 | $7.01K | 4,811,113 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Option exercise | +6,162 | – | – | 4,812,614 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Tax withholding | −1,346 | $4.67 | $6.29K | 4,806,452 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Option exercise | +5,525 | – | – | 4,807,798 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Tax withholding | −1,778 | $4.67 | $8.30K | 4,802,273 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Aug 18, 2026 | Option exercise | +7,363 | – | – | 4,804,051 |
| Michael Holder Director | Aug 18, 2026 | Option exercise | +2,181 | – | – | 62,875 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Option exercise | +57,212 | – | – | 5,581,985 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Tax withholding | −7,062 | $4.67 | $32.98K | 5,524,773 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Tax withholding | −20,956 | $4.67 | $97.86K | 5,561,029 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Option exercise | +29,002 | – | – | 5,531,835 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Tax withholding | −5,382 | $4.67 | $25.13K | 5,502,833 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Option exercise | +22,100 | – | – | 5,508,215 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Tax withholding | −2,869 | $4.67 | $13.40K | 5,486,115 |
| Wenbin Jiang PRESIDENT AND CEO, Director | Aug 18, 2026 | Option exercise | +11,781 | – | – | 5,488,984 |
| Richard Chin Director | Aug 18, 2026 | Option exercise | +6,107 | – | – | 28,499 |
| Ming Yan CHIEF TECHNOLOGY OFFICER, Director | Jun 12, 2026 | Gift | −135,892 | – | – | 4,796,688 |
| Michael Holder Director | Jun 10, 2026 | Option exercise | +43,973 | – | – | 60,694 |
| Deborah J. Neff Director | Jun 10, 2026 | Option exercise | +43,973 | – | – | 59,679 |
| Vera Imper Director | Jun 10, 2026 | Option exercise | +43,973 | – | – | 59,679 |
| Jack Ball Director | Jun 10, 2026 | Option exercise | +43,973 | – | – | 86,678 |
| Richard Chin Director | May 18, 2026 | Option exercise | +6,107 | – | – | 22,392 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Tax withholding | −1,850 | $3.55 | $6.57K | 139,315 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Option exercise | +9,435 | – | – | 153,398 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Tax withholding | −2,602 | $3.55 | $9.24K | 143,963 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Option exercise | +7,250 | – | – | 146,565 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Tax withholding | −3,386 | $3.55 | $12.02K | 150,012 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Option exercise | +5,156 | – | – | 141,165 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Tax withholding | −881 | $3.55 | $3.13K | 136,009 |
| Valerie Barnett CHIEF LEGAL OFFICER | May 18, 2026 | Option exercise | +2,454 | – | – | 136,890 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Tax withholding | −15,009 | $3.55 | $53.28K | 5,477,203 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Option exercise | +14,733 | – | – | 5,443,357 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Tax withholding | −1,913 | $3.55 | $6.79K | 5,428,624 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Option exercise | +7,854 | – | – | 5,430,537 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Tax withholding | −3,588 | $3.55 | $12.74K | 5,439,769 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Option exercise | +38,141 | – | – | 5,492,212 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Tax withholding | −5,032 | $3.55 | $17.86K | 5,454,071 |
| Wenbin Jiang PRESIDENT AND CEO, Director | May 18, 2026 | Option exercise | +19,334 | – | – | 5,459,103 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Tax withholding | −3,122 | $3.55 | $11.08K | 104,317 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Option exercise | +6,320 | – | – | 101,007 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Tax withholding | −2,268 | $3.55 | $8.05K | 98,739 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Tax withholding | −3,839 | $3.55 | $13.63K | 111,177 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Option exercise | +10,699 | – | – | 115,016 |
| William D. McCombe Chief Financial Officer | May 18, 2026 | Option exercise | +8,700 | – | – | 107,439 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Option exercise | +1,024 | – | – | 36,711 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Tax withholding | −1,424 | $3.55 | $5.06K | 43,466 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Option exercise | +5,551 | – | – | 44,890 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Tax withholding | −263 | $3.55 | $934 | 36,448 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Option exercise | +1,473 | – | – | 37,921 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Tax withholding | −620 | $3.55 | $2.20K | 39,339 |
| Philippe Busque SVP, GLOBAL SALES AND SERVICES | May 18, 2026 | Option exercise | +2,416 | – | – | 39,959 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Busque Philippe Officer | Sep 2, 2026 | 31,666 | $146.52K | Sep 2, 2026 | Stock Option Exercise |
| Yan Ming Officer | Apr 9, 2024 | 40,000 | $268.00K | Apr 9, 2024 | Founders Shares |
| Yan Ming Officer | Mar 18, 2024 | 40,000 | $278.00K | Mar 18, 2024 | Founders Shares |
| Yan Ming Officer | Dec 19, 2023 | 20,000 | $184.20K | Dec 19, 2023 | Founders Shares |
| Vrane David Officer | Nov 15, 2023 | 12,000 | $65.64K | Nov 15, 2023 | Founders Shares |
| Jeanmonod Patrik Officer | Oct 24, 2023 | 9,000 | $41.58K | Oct 24, 2023 | Previously Exercised Stock Options |
| Yan Ming Officer | Oct 19, 2023 | 40,000 | $193.60K | Oct 19, 2023 | Restricted Stock Units |
| Jiang Wenbin Officer | Sep 7, 2023 | 60,000 | $413.40K | Sep 7, 2023 | Founders Shares |
| Yan Ming Officer | Aug 21, 2023 | 40,000 | $338.40K | Aug 21, 2023 | Founders Shares |
| Vrane David Officer | Aug 14, 2023 | 12,000 | $112.68K | Aug 14, 2023 | Founders Shares |
| Jeanmonod Patrik Officer | Jul 24, 2023 | 9,000 | $80.10K | Jul 24, 2023 | Previously Exercised Stock Options |
| Yan Ming Officer | Jun 20, 2023 | 40,000 | $334.00K | Jun 20, 2023 | Founders Shares |
| Jiang Wenbin Officer | Jun 7, 2023 | 60,000 | $489.60K | Jun 7, 2023 | Founders Shares |
| Vrane David Officer | May 15, 2023 | 12,000 | $89.88K | May 15, 2023 | Founders Shares |
| Jiang Wenbin Director, Officer | May 8, 2023 | 20,000 | $238.40K | May 8, 2023 | Founders Shares |