Jeffrey S. Mathiesen

CIK: 0001296853

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)0 (0.0%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)5 (100.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (2)

NMTC

NEUROONE MEDICAL TECHNOLOGIES Corp

Director

HSDT

HELIUS MEDICAL TECHNOLOGIES, INC.

DirectorOfficer

Discretionary Trading P&L

Holdings

Transaction History (5 total)

NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
Apr 3, 2026
Award(A)
Direct
41.9K shares-
HSDT
HELIUS MEDICAL TECHNOLOGIES, INC.
Jul 2, 2025
Award(A)
Stock Option (Right to Buy)
Direct
26.2K shares-
NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
Jun 23, 2025
Award(A)
Option to Purchase Common Stock
Direct
50K shares-
NMTC
NEUROONE MEDICAL TECHNOLOGIES Corp
Feb 14, 2025
Award(A)
Direct
27.8K shares-
HSDT
HELIUS MEDICAL TECHNOLOGIES, INC.
Jan 6, 2025
Award(A)
Stock Option (Right to Buy)
Direct
139.9K shares-

		Type	Shares	Price		Ownership
Apr 3, 2026	NMTC NEUROONE MEDICAL TECHNOLOGIES Corp	Award(A)	41,929	-	$0	Direct
Jul 2, 2025	HSDT HELIUS MEDICAL TECHNOLOGIES, INC.	Award(A) Stock Option (Right to Buy)	26,200	-	-	Direct
Jun 23, 2025	NMTC NEUROONE MEDICAL TECHNOLOGIES Corp	Award(A) Option to Purchase Common Stock	50,000	-	-	Direct
Feb 14, 2025	NMTC NEUROONE MEDICAL TECHNOLOGIES Corp	Award(A)	27,778	-	-	Direct
Jan 6, 2025	HSDT HELIUS MEDICAL TECHNOLOGIES, INC.	Award(A) Stock Option (Right to Buy)	139,857	-	-	Direct

1-5 of 5 transactions

About MATHIESEN JEFFREY S

MATHIESEN JEFFREY S (SEC CIK 0001296853) files insider reports with the SEC as Director of NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC) and CFO and Treasurer of HELIUS MEDICAL TECHNOLOGIES, INC. (HSDT).

Signal8 holds 5 ownership filings by MATHIESEN JEFFREY S, all Form 4s, filed between Jan 8, 2025 and Apr 7, 2026. Those filings report 5 transactions, from Jan 6, 2025 to Apr 3, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on MATHIESEN JEFFREY S's filings is in EDEN PRAIRIE, MN.

Recent filings by MATHIESEN JEFFREY S

Apr 3, 2026: Grant or award of NMTC shares (Form 4, code A).
Jul 2, 2025: Grant or award of HSDT derivative securities (Form 4, code A).
Jun 23, 2025: Grant or award of NMTC derivative securities (Form 4, code A).
Feb 14, 2025: Grant or award of NMTC shares (Form 4, code A).
Jan 6, 2025: Grant or award of HSDT derivative securities (Form 4, code A).

Other insiders filing for NEUROONE MEDICAL TECHNOLOGIES Corp (NMTC)

Wambeke David J., Chief Business Officer
Johns Emily J., Chief Administrative Officer
Volker Christopher, Chief Financial Officer
Christianson Mark, Market Development Director
Mertens Steve, Chief Technology Officer
Rosa David A, CEO & President

How to read Form 4 transaction codes