Barnett Valerie 4
4 · Cytek Biosciences, Inc. · Filed May 20, 2026
Research Summary
AI-generated summary of this filing
Cytek (CTKB) Chief Legal Officer Valerie Barnett Receives RSU Award
What Happened
Valerie Barnett, Chief Legal Officer of Cytek Biosciences (CTKB), had a group of Restricted Stock Units (RSUs) convert into 24,295 shares on May 18, 2026 (reported on Form 4 filed May 20, 2026). To satisfy tax withholding on the vesting, 8,719 shares were withheld/surrendered (disposed) at an indicated withholding value of $3.55 per share, totaling $30,953. The filings show the RSU-to-share conversion as derivative exercises (code M) and the withholding as tax withholding (code F).
Key Details
- Transaction date: May 18, 2026; Form 4 filed May 20, 2026 (timely within typical reporting window).
- Shares converted (RSU vesting): 24,295 shares (2,454 + 5,156 + 7,250 + 9,435).
- Shares withheld for taxes: 8,719 shares (881 + 1,850 + 2,602 + 3,386) at $3.55/share = $30,953 total.
- Net increase in shares held after the transactions: +15,576 shares (24,295 converted − 8,719 withheld).
- Transaction codes: M = exercise/conversion of derivative (RSU settlement); F = shares surrendered to satisfy tax withholding.
- Footnotes: RSUs represent contingent rights to one share each (F1); withheld shares were surrendered to the issuer to satisfy taxes (F2); vesting schedules described in F3–F6 (multi‑year vesting on May/Aug/Nov/Mar dates).
Context
This was an RSU vesting and tax-withholding event — not an open‑market sale or purchase. Surrendering shares to cover tax obligations is routine and does not necessarily signal a change in insider sentiment. For retail investors, the notable outcome is a net increase of 15,576 shares held by the CLO following the vesting.
Insider Transaction Report
- Exercise/Conversion
Common Stock
[F1]2026-05-18+2,454→ 136,890 total - Tax Payment
Common Stock
[F2]2026-05-18$3.55/sh−881$3,128→ 136,009 total - Exercise/Conversion
Common Stock
[F1]2026-05-18+5,156→ 141,165 total - Tax Payment
Common Stock
[F2]2026-05-18$3.55/sh−1,850$6,568→ 139,315 total - Exercise/Conversion
Common Stock
[F1]2026-05-18+7,250→ 146,565 total - Tax Payment
Common Stock
[F2]2026-05-18$3.55/sh−2,602$9,237→ 143,963 total - Exercise/Conversion
Common Stock
[F1]2026-05-18+9,435→ 153,398 total - Tax Payment
Common Stock
[F2]2026-05-18$3.55/sh−3,386$12,020→ 150,012 total - Exercise/Conversion
Restricted Stock Units
[F1][F3]2026-05-18−2,454→ 12,280 total→ Common Stock (2,454 underlying) - Exercise/Conversion
Restricted Stock Units
[F1][F4]2026-05-18−5,156→ 56,728 total→ Common Stock (5,156 underlying) - Exercise/Conversion
Restricted Stock Units
[F1][F5]2026-05-18−7,250→ 123,262 total→ Common Stock (7,250 underlying) - Exercise/Conversion
Restricted Stock Units
[F1][F6]2026-05-18−9,435→ 217,018 total→ Common Stock (9,435 underlying)
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.