Cytek Biosciences, Inc.·4

May 20, 6:01 PM ET

Holder Michael 4

4 · Cytek Biosciences, Inc. · Filed May 20, 2026

Research Summary

AI-generated summary of this filing

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Cytek Biosciences (CTKB) Director Michael Holder Converts 1,454 RSUs to Shares

What Happened
Michael Holder, a director of Cytek Biosciences, had 1,454 restricted stock units (RSUs) convert/settle into 1,454 shares on May 18, 2026 (transaction code M — exercise/conversion of a derivative). The filing shows 1,454 shares acquired (no acquisition price reported) and the identical 1,454 shares immediately reported as disposed at $0.00, so no cash proceeds are listed.

Key Details

  • Transaction date: May 18, 2026; Form 4 filed May 20, 2026 with the SEC.
  • Reported amounts: 1,454 shares acquired (conversion of RSUs) and 1,454 shares disposed at $0.00.
  • Price / value: Acquisition price not applicable; disposal price reported as $0.00 (no sale proceeds).
  • Shares owned after transaction: Not specified in the provided filing information.
  • Footnotes: F1 clarifies each RSU equals a contingent right to one share. F2 provides the multi-year vesting schedule (fractional vesting over 36 months with specified vesting dates).
  • Filing timeliness: Form filed two days after the transaction date (May 20, 2026); the filing does not indicate a late-report flag in the provided data.
  • Disposal note: The filing does not state the reason for the $0.00 disposals; filings commonly show similar disposals when shares are withheld or surrendered to cover taxes or related obligations, but that specific reason is not explicitly stated here.

Context
This was a derivative settlement (RSU conversion), not an open-market purchase or sale. Because the shares were reported acquired through conversion and immediately reported disposed at $0.00, this appears to be an administrative settlement rather than a market trade signaling a change in economic exposure. Retail investors often view purchases as stronger signals than administrative RSU settlements; treat this entry as a vesting/settlement disclosure rather than an indicator of directional insider buying or selling.

Insider Transaction Report

Form 4
Period: 2026-05-18
Transactions
  • Exercise/Conversion

    Common Stock

    [F1]
    2026-05-18+1,45416,721 total
  • Exercise/Conversion

    Restricted Stock Units

    [F1][F2]
    2026-05-181,4549,457 total
    Common Stock (1,454 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, 2024; 3/36 of the total shares subject to the RSU Award shall vest on November 18, 2024 and each November 18 thereafter; 4/36 of the total shares underlying the RSU Award shall vest on March 10, 2025 and each March 10 thereafter; 2/36 of the total shares underlying the RSU Award vesting shall vest on May 18, 2025 and each May 18 thereafter; and 3/36 of the total shares underlying the RSU Award shall vest on August 18, 2025 and each August 18 thereafter, until fully vested.
Signature
/s/ Valerie Barnett, Attorney-in-Fact|2026-05-20

Documents

1 file
  • 4
    form4-05202026_100527.xmlPrimary