Cytek CTO exercises RSUs, covers taxes with shares
Cytek Biosciences, Inc. director and Chief Technology Officer Yan Ming reported routine equity compensation activity.
Rhea-AI Filing Summary
Cytek Biosciences, Inc. director and Chief Technology Officer Yan Ming reported routine equity compensation activity. On May 18, 2026, Ming exercised restricted stock units that converted into 22,179 shares of common stock in total. To cover tax obligations tied to these vestings, 5,532 shares of common stock were withheld and surrendered to the company at $3.55 per share, rather than sold on the open market. After these transactions, Ming directly owned 4,919,617 shares of Cytek common stock.
Positive
- None.
Negative
- None.
Insider Trade Summary
22,179 shares exercised/converted
Exercise
12 txns
Insider
Yan Ming
Role
CHIEF TECHNOLOGY OFFICER
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 4,908 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 3,683 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 4,108 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 9,480 | $0.00 | $0.00 |
| Exercise | Common Stock | 4,908 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 1,224 | $3.55 | $4K |
| Exercise | Common Stock | 3,683 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 919 | $3.55 | $3K |
| Exercise | Common Stock | 4,108 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 1,025 | $3.55 | $4K |
| Exercise | Common Stock | 9,480 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 2,364 | $3.55 | $8K |
Holdings After Transaction:
Restricted Stock Units — 352,977 contracts (Direct);
Common Stock — 4,932,580 shares (Direct)
Footnotes (6)
- F1. Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock.
- F2. 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.
- F3. 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, 2023 and each May 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on August 18, 2023 and each August 18 thereafter; 3/48 of the total shares underlying the RSU Award vesting on November 18, 2023 and each November 18 thereafter; and 4/48 of the total shares underlying the RSU Award vesting on March 10, 2024 and each March 10 thereafter, until fully vested.
- F4. 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.
- F5. 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.
- F6. 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.
Key Figures
RSUs converted to common stock: 22,179 shares
Shares withheld for taxes: 5,532 shares
Tax withholding price: $3.55 per share
+3 more
6 metrics
RSUs converted to common stock
22,179 shares
Total derivative exercises (M code) on May 18, 2026
Shares withheld for taxes
5,532 shares
Tax-withholding dispositions (F code) at $3.55 per share
Tax withholding price
$3.55 per share
Value used for shares surrendered to issuer
Shares held after transactions
4,919,617 shares
Direct common stock ownership after May 18, 2026 activity
Exercise transactions count
4 transactions
M-code derivative exercises reported in transactionSummary
Tax-withholding transactions count
4 transactions
F-code dispositions for tax obligations
Key Terms
Restricted Stock Unit, tax withholding obligations, vesting, derivative exercise/conversion, +1 more
5 terms
Restricted Stock Unit financial
"Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share..."
A restricted stock unit is a promise from a company to give an employee shares of stock after certain conditions are met, like staying with the company for a set amount of time. It’s like earning a bonus that turns into company stock once you’ve proven your commitment, making it a way to motivate and reward employees.
tax withholding obligations financial
"shares withheld by and surrendered to the Issuer... to satisfy tax withholding obligations..."
vesting financial
"The shares subject to the RSU Award shall vest over 4 years with 2/48 of the total shares..."
Vesting is the process by which you earn full ownership of something, like company stock or a retirement benefit, over time. It’s like earning the right to keep a gift piece by piece the longer you stay with a company, making sure employees stay committed before they receive all the benefits.
derivative exercise/conversion financial
"transaction_action": "derivative exercise/conversion""
payment of exercise price or tax liability by delivering securities financial
"transaction_code_description": "Payment of exercise price or tax liability by delivering securities""
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What did Cytek Biosciences (CTKB) CTO Yan Ming report in this Form 4?
Yan Ming reported vesting of restricted stock units that converted into Cytek common shares, along with related tax-withholding share dispositions. These transactions reflect routine equity compensation mechanics rather than open-market buying or selling activity.
What do the RSU vesting schedules in Cytek (CTKB) CTO Yan Ming’s filing indicate?
Footnotes describe RSU awards vesting over four years on specific quarterly dates, in fractional portions such as 2/48, 3/48, and 4/48 of the total shares. This illustrates a structured, time-based equity compensation program for the CTO role.
AI-generated analysis. How Rhea-AI works. Not financial advice.
