Cytek Biosciences, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| Jeanmonod Patrik | Chief Financial Officer | Option Exercise | 1,752 | — | — | 96,746 | Aug 18, 2022 |
| Jiang Wenbin | President and CEO | Option Exercise | 6,758 | — | — | 7,848,299 | Aug 18, 2022 |
| Poirson Allen | SVP Marketing and Corp. Dev. | Option Exercise | 790 | — | — | 41,815 | Aug 18, 2022 |
| Yan Ming | Chief Technology Officer | Tax Withholding | 772 | $14.06 | $10,854 | 8,065,624 | Aug 18, 2022 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $15.09 | $301,800 | 7,841,541 | Aug 8, 2022 |
| Jeanmonod Patrik | Chief Financial Officer | Sale | 3,500 | $12.80 | $44,800 | 94,994 | Aug 1, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 20,000 | $11.83 | $236,600 | 8,064,415 | Jul 19, 2022 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $11.19 | $223,800 | 7,861,541 | Jul 7, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 20,000 | $10.06 | $201,200 | 8,084,415 | Jun 21, 2022 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $10.75 | $215,000 | 7,881,541 | Jun 7, 2022 |
| Barnett Valerie | General Counsel | Option Exercise | 2,688 | — | — | 15,088 | May 18, 2022 |
| Jeanmonod Patrik | Chief Financial Officer | Option Exercise | 2,336 | — | — | 98,333 | May 18, 2022 |
| Jiang Wenbin | President and CEO | Tax Withholding | 3,510 | $9.65 | $33,872 | 7,901,541 | May 18, 2022 |
| Poirson Allen | SVP Marketing and Corp. Dev. | Option Exercise | 1,053 | — | — | 41,436 | May 18, 2022 |
| Yan Ming | Chief Technology Officer | Tax Withholding | 1,030 | $9.65 | $9,940 | 8,124,415 | May 18, 2022 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $8.01 | $160,200 | 7,896,040 | May 9, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 20,000 | $10.34 | $206,800 | 8,122,803 | Apr 19, 2022 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $10.54 | $210,800 | 7,916,040 | Apr 7, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 20,000 | $11.64 | $232,800 | 8,142,803 | Mar 21, 2022 |
| RA Capital Healthcare Fund LP | — | Purchase | 342,143 | $12.35 | $4,225,466 | 13,139,327 | Mar 15, 2022 |
| Shah Rajeev M. | — | Purchase | 40,154 | $12.99 | $521,600 | 12,202,700 | Mar 10, 2022 |
| Shah Rajeev M. | — | Purchase | 337,901 | $12.61 | $4,260,932 | 11,916,845 | Mar 8, 2022 |
| Yan Ming | Chief Technology Officer | Option Exercise | 10,555 | $0.92 | $9,711 | 8,162,803 | Mar 7, 2022 |
| Jiang Wenbin | President and CEO | Option Exercise | 66,665 | $0.25 | $16,666 | 7,956,040 | Mar 7, 2022 |
| Barnett Valerie | General Counsel | Option Exercise | 10,500 | $4.71 | $49,455 | 12,400 | Mar 4, 2022 |
| Shah Rajeev M. | — | Purchase | 8,746 | $12.97 | $113,436 | 11,082,163 | Mar 2, 2022 |
| RA Capital Nexus Fund II, L.P. | — | Purchase | 186,467 | $13.03 | $2,429,665 | 11,054,426 | Feb 25, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 20,000 | $13.44 | $268,800 | 8,089,792 | Feb 22, 2022 |
| Shah Rajeev M. | — | Purchase | 166,229 | $14.78 | $2,456,865 | 10,271,886 | Feb 18, 2022 |
| RA CAPITAL MANAGEMENT, L.P. | — | Purchase | 166,200 | $14.99 | $2,491,338 | 9,939,457 | Feb 14, 2022 |
| Yan Ming | Chief Technology Officer | Sale | 14,706 | $15.01 | $220,737 | 8,115,086 | Feb 10, 2022 |
| Yan Ming | Chief Technology Officer | Gift | 10,000 | — | — | 8,129,792 | Dec 7, 2021 |
| Jiang Wenbin | President and CEO | Sale | 20,000 | $14.40 | $288,000 | 7,889,375 | Dec 4, 2021 |
| Kolchinsky Peter | — | C | 507,724 | — | — | 507,724 | Jul 27, 2021 |
| Jiang Wenbin | President and CEO | C | 2,666,600 | — | — | 2,666,600 | Jul 22, 2021 |
| DENG FENG | — | C | 443,800 | — | — | 443,800 | Jul 22, 2021 |
| Poirson Allen | SVP Marketing and Corp. Dev. | Purchase | 1,500 | $17.00 | $25,500 | 40,383 | Jul 22, 2021 |
| Dion Gisele | — | Purchase | 5,000 | $17.00 | $85,000 | 5,000 | Jul 22, 2021 |
| Ball Jack | — | Purchase | 3,000 | $17.00 | $51,000 | 3,000 | Jul 22, 2021 |
| Barnett Valerie | General Counsel | Purchase | 1,900 | $17.00 | $32,300 | 1,900 | Jul 22, 2021 |