Chin Richard 4
4 · Cytek Biosciences, Inc. · Filed May 20, 2026
Research Summary
AI-generated summary of this filing
Cytek Biosciences (CTKB) Director Richard Chin Exercises RSUs
What Happened
Richard Chin, a director of Cytek Biosciences (CTKB), had restricted stock units (RSUs) convert to 6,107 shares on May 18, 2026 (reported on a Form 4 filed May 20, 2026). The filing shows an acquisition/conversion of 6,107 shares (derivative conversion) and a simultaneous disposition of 6,107 shares for $0.00. The zero-dollar disposition is consistent with shares being surrendered rather than a cash sale (commonly to satisfy tax-withholding obligations).
Key Details
- Transaction date: May 18, 2026; Form 4 filed May 20, 2026 (within the 2‑business‑day reporting window).
- Acquired: 6,107 shares via conversion of RSUs (transaction code M).
- Disposed: 6,107 shares at $0.00 (derivative disposal; no cash proceeds reported).
- Footnotes: F1 = each RSU converts to one share; F2 = vesting schedule shows a portion (3/36) of the award vested on May 18, 2026.
- Shares owned after the reported transactions are not specified in the filing.
Context
This was not an open‑market buy or sale but a routine conversion/vesting of RSUs into stock with an equal number of shares surrendered (typically for tax withholding). Such derivative conversions reflect compensation vesting rather than a directional market bet by the insider.
Insider Transaction Report
- Exercise/Conversion
Common Stock
[F1]2026-05-18+6,107→ 22,392 total - Exercise/Conversion
Restricted Stock Units
[F1][F2]2026-05-18−6,107→ 50,897 total→ Common Stock (6,107 underlying)
Footnotes (2)
- [F1]Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock.
- [F2]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.