Cytek SVP exercises RSUs, covers taxes in shares
Cytek Biosciences SVP Philippe Busque reported compensation-related stock activity.
Rhea-AI Filing Summary
Cytek Biosciences SVP Philippe Busque reported compensation-related stock activity. On May 18, 2026, he exercised awards covering 10,464 shares of common stock, converting vested restricted stock units into shares. To cover tax withholding obligations, 2,685 shares were surrendered back to the company at $3.55 per share rather than sold on the open market.
Following these transactions, Busque directly holds 36,448 shares of Cytek Biosciences common stock and 5,641 unvested restricted stock units that may convert into shares as they vest over time under multi-year vesting schedules.
Positive
- None.
Negative
- None.
Insider Trade Summary
10,464 shares exercised/converted
Exercise
12 txns
Insider
Busque Philippe
Role
SVP, GLOBAL SALES AND SERVICES
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 1,024 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 1,473 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 2,416 | $0.00 | $0.00 |
| Exercise | Restricted Stock Units | 5,551 | $0.00 | $0.00 |
| Exercise | Common Stock | 1,024 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 263 | $3.55 | $933.65 |
| Exercise | Common Stock | 1,473 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 378 | $3.55 | $1K |
| Exercise | Common Stock | 2,416 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 620 | $3.55 | $2K |
| Exercise | Common Stock | 5,551 | $0.00 | $0.00 |
| Exercise Price or Tax Liability | Common Stock | 1,424 | $3.55 | $5K |
Holdings After Transaction:
Restricted Stock Units — 190,614 contracts (Direct);
Common Stock — 43,466 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 four years with 13/48 of the total shares underlying the RSU Award vesting on May 18, 2024; 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; 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter; and 2/48 of the total shares underlying the RSU Award vesting on May 18, 2025 and each May 18 thereafter.
- 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 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
Shares from RSU exercises: 10,464 shares
Shares withheld for taxes: 2,685 shares
Post-transaction common shares: 36,448 shares
+2 more
5 metrics
Shares from RSU exercises
10,464 shares
Common stock acquired via RSU conversion on May 18, 2026
Shares withheld for taxes
2,685 shares
Surrendered to issuer at $3.55 per share for tax withholding
Post-transaction common shares
36,448 shares
Direct holdings after May 18, 2026 transactions
Remaining RSUs
5,641 units
Unvested restricted stock units after reported vesting events
Tax withholding price
$3.55 per share
Value used for shares surrendered to cover tax obligations
Key Terms
Restricted Stock Unit, tax withholding obligations, vest over four years, derivative security, +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"
vest over four years financial
"The shares subject to the RSU Award shall vest over four years with 13/48 of the total shares"
derivative security financial
"transaction_code_description: Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
contingent right financial
"represents a contingent right to receive one share of the Issuer's common stock"
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
What insider transactions did Cytek Biosciences (CTKB) report for Philippe Busque?
Cytek Biosciences reported that SVP Philippe Busque exercised equity awards for 10,464 shares of common stock. He used 2,685 of those shares to satisfy tax withholding obligations, with no open-market purchases or sales disclosed in these transactions.
What restricted stock unit activity did Cytek Biosciences (CTKB) disclose for its SVP?
Cytek Biosciences disclosed that multiple restricted stock unit awards vested, converting into 10,464 common shares at a conversion price of $0.00 per share. These RSUs vest over four-year schedules with fractional installments on specified May, August, November, and March vesting dates.
How many unvested restricted stock units does the Cytek Biosciences (CTKB) SVP retain?
Following the May 18, 2026 vesting events, the filing shows Philippe Busque retaining 5,641 restricted stock units. These RSUs represent additional potential shares of Cytek Biosciences common stock that will be delivered only as the awards continue to vest over time.
What does the $3.55 price mean in the Cytek Biosciences (CTKB) Form 4?
The Form 4 lists a price of $3.55 per share for 2,685 shares surrendered. This amount reflects the value used when shares were withheld and returned to Cytek Biosciences to satisfy tax withholding obligations arising from the vesting of restricted stock unit awards.
AI-generated analysis. How Rhea-AI works. Not financial advice.
