CTKB · Cytek Biosciences, Inc.
Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 3, 4 and 5. Form 4 must be filed within two business days of the trade.
| Date | Insider | Role | Type | Security | Shares |
|---|---|---|---|---|---|
| 2026-06-29 | Feuchtwang Ilan |
Chief Legal Officer, Secretary |
Other↑
|
No Securities Owned
|
0 |
| 2026-06-12 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Gift↓
|
Common Stock
|
135,892 |
| 2026-06-10 | MUIR GLENN P |
Director |
Other↑
|
No Securities Owned
|
0 |
| 2026-06-10 | Imper Vera |
Director |
Award↑
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Restricted Stock Units
|
33,333 |
| 2026-06-10 | NEFF DEBORAH J |
Director |
Award↑
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Restricted Stock Units
|
33,333 |
| 2026-06-10 | Holder Michael |
Director |
Award↑
Filing footnotes — Director Stock Option (right to buy) (Direct)
100% of the shares subject to the option shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Director Stock Option (right to buy)
|
18,261 |
| 2026-06-10 | Chin Richard |
Director |
Award↑
Filing footnotes — Director Stock Option (right to buy) (Direct)
100% of the shares subject to the option shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Director Stock Option (right to buy)
|
18,261 |
| 2026-06-10 | Holder Michael |
Director |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award vested on June 10, 2026. |
Restricted Stock Units
|
43,973 |
| 2026-06-10 | Holder Michael |
Director |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
43,973 |
| 2026-06-10 | Imper Vera |
Director |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award vested on June 10, 2026. |
Restricted Stock Units
|
43,973 |
| 2026-06-10 | Holder Michael |
Director |
Award↑
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Restricted Stock Units
|
33,333 |
| 2026-06-10 | Chin Richard |
Director |
Award↑
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Restricted Stock Units
|
33,333 |
| 2026-06-10 | MUIR GLENN P |
Director |
Award↑
Filing footnotes — Director Stock Option (right to buy) (Direct)
1/36 of the total shares subject to the option shall vest monthly over 3 years following the grant date of June 10, 2026. |
Director Stock Option (right to buy)
|
29,835 |
| 2026-06-10 | Imper Vera |
Director |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
43,973 |
| 2026-06-10 | NEFF DEBORAH J |
Director |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
43,973 |
| 2026-06-10 | MUIR GLENN P |
Director |
Award↑
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 2/36 of the total shares subject to the RSU Award shall vest on August 18, 2026; 3/36 of the total shares subject to the RSU Award shall vest on November 18, 2026 and each November 18 thereafter; 4/36 of the total shares underlying the RSU Award shall vest on March 10, 2027 and each March 10 thereafter; 3/36 of the total shares underlying the RSU Award vesting shall vest on May 18, 2027 and each May 18 thereafter; and 3/36 of the total shares underlying the RSU Award shall vest on August 18, 2027 and each August 18 thereafter, until fully vested. |
Restricted Stock Units
|
55,555 |
| 2026-06-10 | NEFF DEBORAH J |
Director |
Award↑
Filing footnotes — Director Stock Option (right to buy) (Direct)
100% of the shares subject to the option shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Director Stock Option (right to buy)
|
18,261 |
| 2026-06-10 | Ball Jack |
Director |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
43,973 |
| 2026-06-10 | NEFF DEBORAH J |
Director |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award vested on June 10, 2026. |
Restricted Stock Units
|
43,973 |
| 2026-06-10 | Ball Jack |
Director |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 100% of the shares subject to the RSU Award vested on June 10, 2026. |
Restricted Stock Units
|
43,973 |
| 2026-06-10 | Imper Vera |
Director |
Award↑
Filing footnotes — Director Stock Option (right to buy) (Direct)
100% of the shares subject to the option shall vest on the earlier of June 10, 2027 and the date of the Issuer's 2027 annual meeting of stockholders (provided such meeting is held in June 2027). |
Director Stock Option (right to buy)
|
18,261 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
1,025 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
5,156 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
881 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
4,108 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
4,908 |
| 2026-05-18 | McCombe William D. |
Director, Chief Financial Officer |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
3,122 |
| 2026-05-18 | Jiang Wenbin |
Director, PRESIDENT AND CEO |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
5,032 |
| 2026-05-18 | McCombe William D. |
Director, Chief Financial Officer |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
3,839 |
| 2026-05-18 | McCombe William D. |
Director, Chief Financial Officer |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
2,268 |
| 2026-05-18 | Jiang Wenbin |
Director, PRESIDENT AND CEO |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
3,588 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2024 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2024 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2024 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter. |
Restricted Stock Units
|
5,156 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
9,480 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
2,454 |
| 2026-05-18 | Busque Philippe |
SVP, GLOBAL SALES AND SERVICES |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2024 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2024 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2024 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter. |
Restricted Stock Units
|
1,473 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
7,250 |
| 2026-05-18 | Busque Philippe |
SVP, GLOBAL SALES AND SERVICES |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
1,024 |
| 2026-05-18 | Barnett Valerie |
CHIEF LEGAL OFFICER |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2026 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2026 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2026 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2027 and each March 10 thereafter, until fully vested. |
Restricted Stock Units
|
9,435 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2024 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2024 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2024 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter. |
Restricted Stock Units
|
3,683 |
| 2026-05-18 | Jiang Wenbin |
Director, PRESIDENT AND CEO |
Convert↑
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
14,733 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
2,364 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
1,224 |
| 2026-05-18 | Holder Michael |
Director |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
1,454 |
| 2026-05-18 | McCombe William D. |
Director, Chief Financial Officer |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2026 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2026 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2026 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2027 and each March 10 thereafter, until fully vested. |
Restricted Stock Units
|
10,699 |
| 2026-05-18 | Busque Philippe |
SVP, GLOBAL SALES AND SERVICES |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
1,473 |
| 2026-05-18 | Chin Richard |
Director |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. 2/36 of the total shares subject to the RSU Award shall vest on August 18, 2025; 3/36 of the total shares subject to the RSU Award shall vest on November 18, 2025 and each November 18 thereafter; 3/36 of the total shares underlying the RSU Award shall vest on March 10, 2026 and each March 10 thereafter; 3/36 of the total shares underlying the RSU Award vesting shall vest on May 18, 2026 and each May 18 thereafter; and 3/36 of the total shares underlying the RSU Award shall vest on August 18, 2026 and each August 18 thereafter, until fully vested. |
Restricted Stock Units
|
6,107 |
| 2026-05-18 | Jiang Wenbin |
Director, PRESIDENT AND CEO |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2024 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2024 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2024 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter. |
Restricted Stock Units
|
14,733 |
| 2026-05-18 | Yan Ming |
Director, CHIEF TECHNOLOGY OFFICER |
Convert↓
Filing footnotes — Restricted Stock Units (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares underlying the RSU Award vesting on May 18, 2025 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2025 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2025 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2026 and each March 10 thereafter, until fully vested. |
Restricted Stock Units
|
4,108 |
| 2026-05-18 | Busque Philippe |
SVP, GLOBAL SALES AND SERVICES |
Tax↓
Filing footnotes — Common Stock (Direct)
Represents the number of shares withheld by and surrendered to the Issuer on May 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
Common Stock
|
378 |
| 2026-05-18 | McCombe William D. |
Director, Chief Financial Officer |
Convert↑
Filing footnotes — Common Stock (Direct)
Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
Common Stock
|
10,699 |