MATHIESEN JEFFREY S
SEC insider (Form 3/4/5 filer). CIK 0001296853. Director at NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) and 1 other issuer. 5 reported Form 4/5 transactions since Sep 2024; latest on Apr 3, 2026. Located in EDEN PRAIRIE, MN.
Companies MATHIESEN JEFFREY S has filed insider reports for
- NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC): Director
- HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT): Director, Officer, CFO and Treasurer
MATHIESEN JEFFREY S
CIK: 0001296853
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (5 total)
- Apr 3, 2026NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
AwardDirect41.9K shares- - Jul 2, 2025HSDT
HELIUS MEDICAL TECHNOLOGIES, INC.
AwardDirectStock Option (Right to Buy)
26.2K shares- - Jun 23, 2025NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
AwardDirectOption to Purchase Common Stock
50K shares- - Feb 14, 2025NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
AwardDirect27.8K shares- - Jan 6, 2025HSDT
HELIUS MEDICAL TECHNOLOGIES, INC.
AwardDirectStock Option (Right to Buy)
139.9K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Apr 3, 2026 |  NMTC NEUROONE MEDICAL TECHNOLOGIES Corp | Award | 41,929 | - | $0 | Direct |
| Jul 2, 2025 |  HSDT HELIUS MEDICAL TECHNOLOGIES, INC. | Award Stock Option (Right to Buy) | 26,200 | - | - | Direct |
| Jun 23, 2025 | NMTC NEUROONE MEDICAL TECHNOLOGIES Corp | Award Option to Purchase Common Stock | 50,000 | - | - | Direct |
| Feb 14, 2025 | NMTC NEUROONE MEDICAL TECHNOLOGIES Corp | Award | 27,778 | - | - | Direct |
| Jan 6, 2025 | HSDT HELIUS MEDICAL TECHNOLOGIES, INC. | Award Stock Option (Right to Buy) | 139,857 | - | - | Direct |
1-5 of 5 transactions