Neuroone Medical Technologies

NMTC on Nasdaq. Market value $10m.

Watch this stockFree. We tell you when something changes.

Should I look at this?

Look carefully before going further

Why it could be worth it

Nothing stands out yet.

Read the warning sign in its own filings

This is not advice.

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Who owns it

None of the long-term investors we follow own it. 25 funds in all.

Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

4 investors own more than 5%.

  • MERCHANT ADVENTURE FUND, L.P.
    Passive investor
    13.6%
    Since 31 December 2024
  • Brian Pratt
    Passive investor
    at least 12.5%+5.1 pts
    (filed with 1 related holder)
    Since 10 July 2026
  • Bleichroeder LP
    Passive investor
    at least 8.0%
    (filed with 2 related holders)
    Since 30 June 2025
  • JAMES E. BESSER
    Passive investor
    at least 4.9%
    (filed with 4 related holders)
    Since 31 December 2024
  • Sold down below 5%
    Since 31 March 2025
  • Sold down below 5%
    Since 30 September 2025
  • LYTTON LAURENCE W
    Passive investor
    Sold down below 5%
    Since 31 March 2025

From Schedule 13D and 13G filings: anyone owning more than 5% must file one.

What insiders did

In the last 12 months, 1 insider bought $736,999 of shares on the open market. 1 sold $54,851.

  • Wambeke David J.
    Chief Business Officer
    Bought
    Date
    27 August 2026
    Shares
    33,333
    Price
    $2.01
    Value
    $66,999
  • Christianson Mark
    Market Development Director
    Sold
    Date
    30 June 2026
    Shares
    10,000
    Price
    $3.18
    Value
    $31,773
  • Christianson Mark
    Business Development Director
    Sold
    Date
    30 March 2026
    Shares
    15,363
    Price
    $0.74
    Value
    $11,369
  • Christianson Mark
    Business Development Director
    Sold
    Date
    13 March 2026
    Shares
    100
    Price
    $0.80
    Value
    $80
  • Christianson Mark
    Business Development Director
    Sold
    Date
    12 March 2026
    Shares
    817
    Price
    $0.80
    Value
    $654
  • Christianson Mark
    Business Development Director
    Sold
    Date
    11 March 2026
    Shares
    2,109
    Price
    $0.80
    Value
    $1,687
  • Christianson Mark
    Business Development Director
    Sold
    Date
    10 March 2026
    Shares
    11,611
    Price
    $0.80
    Value
    $9,289
  • Wambeke David J.
    Chief Business Officer
    Bought
    Date
    1 March 2026
    Shares
    1,000,000
    Price
    $0.67
    Value
    $670,000

From Form 4 filings: insiders must report trades in their own company's shares within two days.

Warning signs in its filings

Problems the company itself reported to the SEC, in its own words.

3 serious warning signs in Neuroone Medical Technologies’ filings.

We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.

We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 17 Dec 2025, plus the 10-Q filed 13 Aug 2026 and 13 later 8-Ks.

  • Doubt it can keep going

    Serious

    The company or its auditor warned it may not have enough money to last the next year.

    “These factors raise substantial doubt about the Company’s ability to continue as a going concern.”
    Show the full paragraph
    The accompanying condensed financial statements have been prepared on the basis that the Company will continue as a going concern. The Company has incurred losses since inception, negative cash flows from operations, and an accumulated deficit of $ 84.4 million as of June 30, 2026. To date, the Company’s revenues have not been sufficient to cover its full operating costs, and as such, it has been dependent on funding operations through the issuance of debt and sale of equity securities which previously resulted in substantial doubt regarding the Company’s ability to continue as a going concern. As of June 30, 2026, the Company had $ 2.0 million in cash and cash equivalents. The Company believes its current available cash and cash equivalents, including cash received through the ATM Program subsequent to June 30, 2026, coupled with the anticipated increase in product revenues from minimum purchases and improved gross margins under the distribution agreement with Zimmer (See “Note 7– Zimmer Distribution Agreement and Other Product Revenue”) and forecasted operating expense reductions, will be sufficient to fund the Company’s operations into January 2027. The raising of additional funds is not solely within the control of the Company. These factors raise substantial doubt about the Company’s ability to continue as a going concern. The condensed financial statements do not include any adjustments that might result from the outcome of this condition. If the Company is unable to raise additional funds, or the Company’s anticipated operating results are not achieved, management believes planned expenditures may need to be reduced in order to extend the time period that existing resources can fund the Company’s operations.

    From the 10-Q filed 13 August 2026, Part I, Item 1. Financial Statements. Read it in the filing

  • Weak checks on its own accounts

    Serious

    The company said its checks on its own accounts did not work at the end of its latest quarter. Mistakes could slip into the numbers.

    “Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures were not effective at the reasonable assurance level as of June 30, 2026 due to the material weaknesses in our internal controls over financial reporting as discussed further below that were identified in both the Company’s Annual Report on Form 10-K for the year ended September 30, 2025 and in the Company’s Quarterly Report on the Form 10-Q for the three and six months ended March 31, 2026.”
    Show the full paragraph
    As required by Rule 13a-15(b) of the Securities Exchange Act of 1934, as amended, or the Exchange Act, under the direction of the Chief Executive Officer and the Chief Financial Officer, we have evaluated our disclosure controls and procedures as of the end of the period covered by this Quarterly Report on Form 10-Q. Based on this evaluation, our Chief Executive Officer and our Chief Financial Officer have concluded that our disclosure controls and procedures were not effective at the reasonable assurance level as of June 30, 2026 due to the material weaknesses in our internal controls over financial reporting as discussed further below that were identified in both the Company’s Annual Report on Form 10-K for the year ended September 30, 2025 and in the Company’s Quarterly Report on the Form 10-Q for the three and six months ended March 31, 2026. Notwithstanding this material weakness, our management has concluded that the condensed financial statements included elsewhere in this Quarterly Report present fairly, in all material respects, our financial position, results of operations and cash flows in conformity with generally accepted accounting principles.

    From the 10-Q filed 13 August 2026, Part I, Item 4. Controls and Procedures. Read it in the filing

  • Its past accounts can't be relied on

    Serious

    It told the SEC its earlier accounts should no longer be relied on, usually because they contained errors.

    8-K Item 4.02 filed 22 May 2026: the company said its earlier financial statements should no longer be relied on.

    From an 8-K filed 22 May 2026: Previously issued accounts should no longer be relied on. Open the filing

  • One big customer

    Worth knowing

    One customer brings in a big share of sales: 97% last year. Losing that customer would hurt.

    “For the year ended September 30, 2025, one customer accounted for 97% of the Company’s product revenue and 4 customers accounted for the remaining 3% of product revenue.”

    From the 10-K filed 17 December 2025, Item 8. Financial Statements and Notes - Independent auditor's report. Read it in the filing

A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.

The deep dive

Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.

  • What the business is worth, as a range, and the margin of safety at today’s price
  • Prices to start buying, buy, and buy hard
  • The three things that would make this a mistake
  • Every number footnoted to the filing it came from
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What a finished deep dive looks like

Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.