Form 4 for CTKB Cytek Biosciences, Inc.
Accepted 2026-06-12 19:34:18 ET · period of report 2026-06-10 · accession 0001873083-26-000001 · 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 | 2026-06-12 19:34 | 2026-06-10 | CTKB | Ball Jack | Dir | M - OptEx | — | +44.0K | 86.7K | +103% | — |
| D | 2026-06-12 19:34 | 2026-06-10 | CTKB | Ball Jack | Dir | M - OptEx | $0.00 | -44.0K | 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 | 2026-06-10 | M | A | 43,973 | — | 86,678 | D | — | — | (F1) Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. |
| 2 | Derivative | Restricted Stock Units | 2026-06-10 | M | D | 43,973 | $0.00 | 0 | D | — · — to — | 43,973 Common Stock | (F1) Each Restricted Stock Unit (the "RSU Award") represents a contingent right to receive one share of the Issuer's common stock. (F2) 100% of the shares subject to the RSU Award vested on June 10, 2026. (F2) 100% of the shares subject to the RSU Award vested on June 10, 2026. |