Jiang Wenbin — SEC Form 4 filings
SEC reporting owner CIK 1872873. 17 Form 4 filings on record with FilingPulse; latest filed 2026-08-20.
Transaction summary — filings shown
Covers all 17 filings on record, filed 2024-02-22 to 2026-08-20. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): none reported.
- Open-market sales (code S, non-derivative): none reported.
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 121.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Cytek Biosciences, Inc. (CTKB) | PRESIDENT AND CEO, Director | 17 | — | — | 121 |
Form 4 filings — Jiang Wenbin
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-08-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $4.67 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $4.67 · Option exercise (M): 29,002 · Tax withholding (F): 7,062 @ $4.67 · +6 more | EDGAR |
| 2026-05-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 7,854 · Tax withholding (F): 1,913 @ $3.55 · Option exercise (M): 14,733 · Tax withholding (F): 3,588 @ $3.55 · Option exercise (M): 19,334 · Tax withholding (F): 5,032 @ $3.55 · +6 more | EDGAR |
| 2026-03-12 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 15,708 · Tax withholding (F): 3,825 @ $4.23 · Option exercise (M): 29,467 · Tax withholding (F): 7,747 @ $4.23 · Option exercise (M): 38,669 · Tax withholding (F): 9,416 @ $4.23 · +5 more | EDGAR |
| 2026-02-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 4,514 · Tax withholding (F): 1,339 @ $4.20 · Option exercise (M): 4,514 (derivative) @ $0 | EDGAR |
| 2025-11-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 2,660 @ $5.53 · Option exercise (M): 11,781 · Tax withholding (F): 4,636 @ $5.53 · Option exercise (M): 22,100 · Tax withholding (F): 8,697 @ $5.53 · +6 more | EDGAR |
| 2025-08-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 1,646 @ $4.06 · Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $4.06 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $4.06 · +6 more | EDGAR |
| 2025-05-21 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 1,646 @ $2.69 · Option exercise (M): 7,854 · Tax withholding (F): 1,913 @ $2.69 · Option exercise (M): 14,733 · Tax withholding (F): 3,588 @ $2.69 · +6 more | EDGAR |
| 2025-03-12 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 15,708 · Tax withholding (F): 4,658 @ $4.36 · Option exercise (M): 29,467 · Tax withholding (F): 7,998 @ $4.36 · Option exercise (M): 15,708 (derivative) @ $0 · Option exercise (M): 29,467 (derivative) @ $0 | EDGAR |
| 2025-03-06 | 4 | Cytek Biosciences, Inc. (CTKB) | Grant/award (A): 735,294 (derivative) @ $0 · Grant/award (A): 464,037 (derivative) @ $0 | EDGAR |
| 2025-02-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 2,004 @ $5.31 · Option exercise (M): 6,758 (derivative) @ $0 | EDGAR |
| 2024-11-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 1,646 @ $6.03 · Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $6.03 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $6.03 · +3 more | EDGAR |
| 2024-09-16 | 4 | Cytek Biosciences, Inc. (CTKB) | Gift (G): 200,000 @ $0 | EDGAR |
| 2024-08-21 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 1,646 @ $5.53 · Option exercise (M): 11,781 · Tax withholding (F): 2,869 @ $5.53 · Option exercise (M): 22,100 · Tax withholding (F): 5,382 @ $5.53 · +3 more | EDGAR |
| 2024-05-22 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 1,601 @ $5.96 · Option exercise (M): 7,854 · Tax withholding (F): 1,913 @ $5.96 · Option exercise (M): 14,733 · Tax withholding (F): 3,588 @ $5.96 · +3 more | EDGAR |
| 2024-03-13 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 15,708 · Tax withholding (F): 4,646 @ $7.22 · Option exercise (M): 15,708 (derivative) @ $0 | EDGAR |
| 2024-03-08 | 4 | Cytek Biosciences, Inc. (CTKB) | Grant/award (A): 526,315 (derivative) @ $0 · Grant/award (A): 353,606 (derivative) @ $0 | EDGAR |
| 2024-02-22 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 6,758 · Tax withholding (F): 2,004 @ $8.38 · Option exercise (M): 6,758 (derivative) @ $0 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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