Form 4 for CTKB Cytek Biosciences, Inc.
Accepted 2026-02-20 00:00:00 ET · period of report 2026-02-18 · accession 0001872873-26-000002 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| D | 2026-02-20 | 2026-02-18 | CTKB | Jiang Wenbin | Pres AND CEO, Dir | M - OptEx | — | +4,514 | 5.36M | +0.1% | — |
| D | 2026-02-20 | 2026-02-18 | CTKB | Jiang Wenbin | Pres AND CEO, Dir | F - Tax | $4.20 | -1,339 | 5.36M | -0.0% | -$5,624 |
| D | 2026-02-20 | 2026-02-18 | CTKB | Jiang Wenbin | Pres AND CEO, Dir | M - OptEx | $0.00 | -4,514 | 0 | -100% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Common Stock | 2026-02-18 | M | A | 4,514 | — | 5,361,166 | D | — | — | (F1) Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
| 2 | Common | Common Stock | 2026-02-18 | F | D | 1,339 | $4.20 | 5,359,827 | D | — | — | (F2) Represents the number of shares withheld by and surrendered to the Issuer on February 18, 2026, to satisfy tax withholding obligations that arose in connection with the vesting of the RSU Award. |
| 3 | Derivative | Restricted Stock Units | 2026-02-18 | M | D | 4,514 | $0.00 | 0 | D | — · — to — | 4,514 Common Stock | (F1) Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. (F3) The shares subject to the RSU Award shall vest quarterly over four years, with 4/48th of the total shares underlying the RSU Award vesting on May 18, 2022 and 3/48th of the total shares underlying the RSU Award vesting each subsequent quarter thereafter on August 18, November 18, February 18 and May 18. |