Barnett Valerie — SEC Form 4 filings
SEC reporting owner CIK 1873091. 15 Form 4 filings on record with FilingPulse; latest filed 2026-05-20.
Transaction summary — filings shown
Covers all 15 filings on record, filed 2024-02-22 to 2026-05-20. 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, …): 108.
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) | CHIEF LEGAL OFFICER | 15 | — | — | 108 |
Form 4 filings — Barnett Valerie
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-05-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,454 · Tax withholding (F): 881 @ $3.55 · Option exercise (M): 5,156 · Tax withholding (F): 1,850 @ $3.55 · Option exercise (M): 7,250 · Tax withholding (F): 2,602 @ $3.55 · +6 more | EDGAR |
| 2026-03-12 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 4,908 · Tax withholding (F): 1,761 @ $4.23 · Option exercise (M): 10,313 · Tax withholding (F): 4,247 @ $4.23 · Option exercise (M): 14,501 · Tax withholding (F): 5,740 @ $4.23 · +5 more | EDGAR |
| 2026-02-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 1,346 · Tax withholding (F): 525 @ $4.20 · Option exercise (M): 1,346 (derivative) @ $0 | EDGAR |
| 2025-11-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 649 @ $5.53 · Option exercise (M): 3,681 · Tax withholding (F): 1,184 @ $5.53 · Option exercise (M): 7,735 · Tax withholding (F): 2,487 @ $5.53 · +6 more | EDGAR |
| 2025-08-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $4.06 · Option exercise (M): 3,681 · Tax withholding (F): 1,434 @ $4.06 · Option exercise (M): 7,735 · Tax withholding (F): 3,000 @ $4.06 · +6 more | EDGAR |
| 2025-05-21 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $2.69 · Option exercise (M): 2,454 · Tax withholding (F): 956 @ $2.69 · Option exercise (M): 5,156 · Tax withholding (F): 2,009 @ $2.69 · +6 more | EDGAR |
| 2025-03-12 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 4,908 · Tax withholding (F): 1,912 @ $4.36 · Option exercise (M): 10,313 · Tax withholding (F): 4,017 @ $4.36 · Option exercise (M): 4,908 (derivative) @ $0 · Option exercise (M): 10,313 (derivative) @ $0 | EDGAR |
| 2025-03-06 | 4 | Cytek Biosciences, Inc. (CTKB) | Grant/award (A): 275,735 (derivative) @ $0 · Grant/award (A): 174,013 (derivative) @ $0 | EDGAR |
| 2025-02-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $5.31 · Option exercise (M): 2,016 (derivative) @ $0 | EDGAR |
| 2024-11-20 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 661 @ $6.03 · Option exercise (M): 3,681 · Tax withholding (F): 1,235 @ $6.03 · Option exercise (M): 7,735 · Tax withholding (F): 2,603 @ $6.03 · +3 more | EDGAR |
| 2024-08-21 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $5.53 · Option exercise (M): 3,681 · Tax withholding (F): 1,434 @ $5.53 · Option exercise (M): 7,735 · Tax withholding (F): 2,826 @ $5.53 · +3 more | EDGAR |
| 2024-05-22 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $5.96 · Option exercise (M): 2,454 · Tax withholding (F): 956 @ $5.96 · Option exercise (M): 5,156 · Tax withholding (F): 2,009 @ $5.96 · +3 more | EDGAR |
| 2024-03-13 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 4,908 · Tax withholding (F): 1,912 @ $7.22 · Option exercise (M): 4,908 (derivative) @ $0 | EDGAR |
| 2024-03-08 | 4 | Cytek Biosciences, Inc. (CTKB) | Grant/award (A): 184,210 (derivative) @ $0 · Grant/award (A): 123,762 (derivative) @ $0 | EDGAR |
| 2024-02-22 | 4 | Cytek Biosciences, Inc. (CTKB) | Option exercise (M): 2,016 · Tax withholding (F): 786 @ $8.38 · Option exercise (M): 2,016 (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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