NeuroOne (NMTC) executive trims stake with 15,363-share sale and tax withholding

Rhea-AI Filing Summary

NeuroOne Medical Technologies officer Mark Christianson reported recent transactions in the company’s Common Stock. On March 30, he completed an open-market sale of 15,363 shares at $0.74 per share. On March 31, an additional 253 shares were disposed of as a tax-withholding transaction, covering tax obligations rather than representing a market trade.

Following these transactions, Christianson holds 198,667 shares of NeuroOne Common Stock directly, according to the filing. The activity reflects a net reduction in his position, primarily driven by the open-market sale, with the smaller tax-withholding disposition tied to equity-related compensation.

Insider Trade Summary

Net Seller: 15,363 shares ($11,369)

Net Sell 2 txns

Insider Christianson Mark

Role Business Development Director

Sold 15,363 shs ($11K)

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock	253	$0.777	$196.58
Sale	Common Stock	15,363	$0.74	$11K

Holdings After Transaction: Common Stock — 198,667 shares (Direct)

Footnotes (1)

Key Figures

Open-market sale: 15,363 shares at $0.74 Tax-withholding shares: 253 shares at $0.777 Shares held after transactions: 198,667 shares +2 more

5 metrics

Open-market sale 15,363 shares at $0.74 Common Stock sale on March 30, 2026

Tax-withholding shares 253 shares at $0.777 Tax-withholding disposition on March 31, 2026

Shares held after transactions 198,667 shares Direct Common Stock holdings following reported trades

Net buy/sell shares -15,363 shares Net effect from sale activity in transaction summary

Tax-withholding count 1 transaction, 253 shares TransactionSummary tax withholding activity

Key Terms

open-market sale, tax-withholding disposition, Common Stock, transaction code F, +1 more

5 terms

open-market sale financial

"transaction_action": "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

tax-withholding disposition financial

"transaction_action": "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

Common Stock financial

"security_title": "Common Stock""

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

transaction code F regulatory

"transaction_code": "F""

transaction code S regulatory

"transaction_code": "S""

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Christianson Mark

(Last) (First) (Middle)

7599 ANAGRAM DR.

(Street)

EDEN PRAIRIE MINNESOTA 55344

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
NEUROONE MEDICAL TECHNOLOGIES Corp [ NMTC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Business Development Director

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
03/30/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/30/2026		S		15,363	D	$0.74	198,920	D
Common Stock	03/31/2026		F		253	D	$0.777	198,667	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

	/s/ Emily Johns, by Power of Attorney	04/01/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did NMTC executive Mark Christianson report on this Form 4?

Mark Christianson reported an open-market sale of 15,363 NeuroOne (NMTC) Common Stock shares at $0.74 per share, plus a 253-share tax-withholding disposition related to equity compensation. Together, these transactions reduced his direct holdings while covering tax obligations.

How many NMTC shares did Mark Christianson sell in the open market?

He sold 15,363 shares of NeuroOne (NMTC) Common Stock in an open-market sale at a price of $0.74 per share. This transaction is classified as a standard sale in the market, separate from shares withheld for taxes.

What is a tax-withholding disposition in the NMTC Form 4 filing?

A tax-withholding disposition means 253 shares of NeuroOne (NMTC) stock were surrendered to satisfy tax obligations on equity compensation. It is coded as an F transaction and is not an open-market sale, but an administrative tax payment method.

How many NMTC shares does Mark Christianson hold after these transactions?

After the reported transactions, Mark Christianson directly holds 198,667 shares of NeuroOne (NMTC) Common Stock. This figure reflects his position following both the open-market sale and the smaller tax-withholding share disposition recorded on the Form 4.

What is the overall share impact of Mark Christianson’s NMTC transactions?

The filing shows a net reduction of 15,363 shares from an open-market sale and 253 shares used for tax withholding. In total, the transactions decreased his direct NeuroOne (NMTC) holdings while leaving a remaining position of 198,667 shares.