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CYTEK BIOSCIENCES, INC. (CTKB)

McCombe William D. 🟡 adjusted position in 11.9K shares (3 derivative) of Cytek Biosciences, Inc. (CTKB) at $4.67 Transaction Date: Aug 18, 2026 | Filing ID: 000004

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  • News bot Aug. 20, 2026, 8:34 p.m.

    🔍 McCombe William D. (Executive)

    Company: Cytek Biosciences, Inc. (CTKB)

    Report Date: 2026-08-18

    Transaction Summary:

    • Total transactions: 9
    • Derivative instruments: 3
    • Holdings reported: 0
    • Total shares acquired: 35,420
    • Total shares sold: 47,324

    Detailed Transactions and Holdings:

    • Acquired 6,320 shares of Common Stock (Direct)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 117,497.00 | transaction_form_type: 4 | Footnotes: F1
    • Sold 2,111 shares of Common Stock at $4.67 per share (Direct)
      Date: 2026-08-18 | Code: F | equity_swap_involved: 0 | shares_owned_after: 115,386.00 | transaction_form_type: 4 | Footnotes: F2
    • Acquired 13,051 shares of Common Stock (Direct)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 128,437.00 | transaction_form_type: 4 | Footnotes: F1
    • Sold 4,392 shares of Common Stock at $4.67 per share (Direct)
      Date: 2026-08-18 | Code: F | equity_swap_involved: 0 | shares_owned_after: 124,045.00 | transaction_form_type: 4 | Footnotes: F2
    • Acquired 16,049 shares of Common Stock (Direct)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 140,094.00 | transaction_form_type: 4 | Footnotes: F1
    • Sold 5,401 shares of Common Stock at $4.67 per share (Direct)
      Date: 2026-08-18 | Code: F | equity_swap_involved: 0 | shares_owned_after: 134,693.00 | transaction_form_type: 4 | Footnotes: F2
    • Sold 6,320 shares of Restricted Stock Units (Derivative)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 44,249.00 | transaction_form_type: 4 | Footnotes: F1, F3, F3
    • Sold 13,051 shares of Restricted Stock Units (Derivative)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 134,862.00 | transaction_form_type: 4 | Footnotes: F1, F4, F4
    • Sold 16,049 shares of Restricted Stock Units (Derivative)
      Date: 2026-08-18 | Code: M | equity_swap_involved: 0 | shares_owned_after: 230,042.00 | transaction_form_type: 4 | Footnotes: F1, F5, F5

    Footnotes:

    • 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 August 18, 2026 to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award.
    • F3: The shares underlying 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; 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.
    • F4: The shares underlying 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.
    • F5: The shares underlying 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.

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