Cytek (CTKB) Form 4: Executive RSUs Vesting and Withheld Shares Reported
Rhea-AI Filing Summary
William D. McCombe, Chief Financial Officer and Director of Cytek Biosciences, Inc. (CTKB), reported changes in beneficial ownership related to vesting of restricted stock units on 08/18/2025.
The filing shows two RSU vesting events recorded as acquisitions of 6,320 and 13,051 RSUs (each RSU convertible into one share). To satisfy tax withholding on the vesting, the issuer withheld 2,462 and 5,084 shares at a per-share price of $4.06. Post-transaction ownership figures reported in the form include multiple balances (for common stock and underlying derivative holdings), with derivative share totals of 6,320 and 13,051 underlying shares and aggregate beneficial ownership figures shown in the filing. The RSUs vest over four years on a specified schedule described in the explanations. The form was signed by an attorney-in-fact on 08/20/2025.
Positive
- RSU vesting disclosed, showing alignment of executive compensation with long-term retention
- No open-market sales reported other than shares withheld to satisfy tax obligations
Negative
- Shares withheld for tax withholding reduced the net increase in beneficial ownership
- Filing shows standard dilution potential as multiple RSU tranches remain scheduled to vest
Insights
TL;DR: Routine executive equity vesting and tax-withholding; no sales beyond withholding, so limited immediate market impact.
The Form 4 documents standard compensation vesting for the CFO with two RSU vesting events that increased his beneficially owned shares while triggering share-withholding to satisfy taxes at $4.06 per share. This is a non-dispositive event for investors: it does not indicate a cash sale or material disposition beyond withholding, and reported post-transaction holdings remain concentrated as shown. The filing provides clear vesting schedules and exact withheld-share counts, allowing precise tracking of future share releases.
TL;DR: Vesting of executive RSUs aligns compensation with retention; disclosure is timely and complies with Section 16 reporting.
The submission discloses the mechanics of RSU vesting and tax withholding consistent with standard equity compensation practices. The detailed vesting timetable and number of shares withheld for taxes support transparency around insider incentives and dilution timing. There is no indication of unexpected dispositions or governance concerns in this filing.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 6,320 | $0.00 | -- |
| Exercise | Restricted Stock Units | 13,051 | $0.00 | -- |
| Exercise | Common Stock | 6,320 | $0.00 | -- |
| Tax Withholding | Common Stock | 2,462 | $4.06 | $10K |
| Exercise | Common Stock | 13,051 | $0.00 | -- |
| Tax Withholding | Common Stock | 5,084 | $4.06 | $21K |
Footnotes (1)
- Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. Represents the number of shares withheld by and surrendered to the Issuer on August 18, 2025, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. The shares subject to the RSU Award shall vest over 4 years with 12/48 of the total shares underlying the RSU Award vesting on May 18, 2025; 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 3/48 of the total shares underlying the RSU Award vesting on March 10, 2026 and each March 10 thereafter; and 3/48 of the total shares underlying the RSU Award vesting on May 18, 2026 and each May 18 thereafter. 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.
