Philippe Busque - 19 May 2025 Form 4 Insider Report for Cytek Biosciences, Inc. (CTKB)

Role
SVP, GLOBAL SALES AND SERVICES
Signature
/s/ Valerie Barnett, Attorney-in-Fact
Issuer symbol
CTKB
Transactions as of
19 May 2025
Transactions value $
-$5,151
Form type
4
Filing time
21 May 2025, 17:52:38 UTC
Previous filing
12 Mar 2025
Next filing
20 Aug 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Busque Philippe SVP, GLOBAL SALES AND SERVICES C/O CYTEK BIOSCIENCES, INC., 47215 LAKEVIEW BLVD., FREMONT /s/ Valerie Barnett, Attorney-in-Fact 21 May 2025 0001991396

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CTKB Common Stock Options Exercise +1.02K +6.43% 16.9K 19 May 2025 Direct F1
transaction CTKB Common Stock Tax liability -$1.07K -399 -2.35% $2.69 16.5K 19 May 2025 Direct F2
transaction CTKB Common Stock Options Exercise +1.47K +8.9% 18K 19 May 2025 Direct F1
transaction CTKB Common Stock Tax liability -$1.54K -574 -3.19% $2.69 17.4K 19 May 2025 Direct F2
transaction CTKB Common Stock Options Exercise +2.42K +13.85% 19.9K 19 May 2025 Direct F1
transaction CTKB Common Stock Tax liability -$2.53K -942 -4.74% $2.69 18.9K 19 May 2025 Direct F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction CTKB Restricted Stock Units Options Exercise $0 -1.02K -7.99% $0.00 11.8K 19 May 2025 Common Stock 1.02K Direct F1, F3
transaction CTKB Restricted Stock Units Options Exercise $0 -1.47K -5.55% $0.00 25K 19 May 2025 Common Stock 1.47K Direct F1, F4
transaction CTKB Restricted Stock Units Options Exercise $0 -2.42K -4.17% $0.00 55.6K 19 May 2025 Common Stock 2.42K Direct F1, F5
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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 19, 2025, 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 four years with 13/48 of the total shares underlying the RSU Award vesting on May 18, 2024; 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; 4/48 of the total shares underlying the RSU Award vesting on March 10, 2025 and each March 10 thereafter; and 2/48 of the total shares underlying the RSU Award vesting on May 18, 2025 and each May 18 thereafter.
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 each 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 each March 10, 2026 and each March 10 thereafter, until fully vested.