MATHIESEN JEFFREY S — SEC Form 4 filings
SEC reporting owner CIK 1296853. 6 Form 4 filings on record with FilingPulse; latest filed 2026-04-07.
Transaction summary — filings shown
Covers all 6 filings on record, filed 2024-07-05 to 2026-04-07. 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, …): 8.
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 |
|---|---|---|---|---|---|
| NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) | Director | 3 | — | — | 5 |
| HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT) | CFO and Treasurer, Director | 3 | — | — | 3 |
Form 4 filings — MATHIESEN JEFFREY S
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-04-07 | 4 | NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) | Grant/award (A): 41,929 @ $0 · Grant/award (A): 26,036 (derivative) @ $0 | EDGAR |
| 2025-07-03 | 4 | HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT) | Grant/award (A): 26,200 (derivative) @ $0 | EDGAR |
| 2025-06-25 | 4 | NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) | Grant/award (A): 50,000 (derivative) @ $0 | EDGAR |
| 2025-02-19 | 4 | NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) | Grant/award (A): 27,778 @ $0 · Grant/award (A): 17,025 (derivative) @ $0 | EDGAR |
| 2025-01-08 | 4 | HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT) | Grant/award (A): 139,857 (derivative) @ $0 | EDGAR |
| 2024-07-05 | 4 | HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT) | Grant/award (A): 404,000 (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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