STOCK TITAN

Madryn discloses 30.3% Neuronetics (STIM) stake and voting pact

Filing Impact
(Moderate)
Filing Sentiment
(Neutral)
Form Type
SCHEDULE 13D/A

Rhea-AI Filing Summary

Madryn-affiliated investment funds report a major stake in Neuronetics, Inc., holding 20,737,061 shares of common stock, or about 30.3% of the company. These percentages are based on 68,485,922 shares outstanding as of October 29, 2025, from Neuronetics’ Form 10-Q.

The filing describes a Registration Rights Agreement, as amended, giving Madryn parties registration and piggyback rights for their consideration shares. Madryn has agreed not to acquire additional Neuronetics equity or convertible debt and to vote all of its shares at the 2026 annual meeting in line with the board’s recommendations on specified proposals.

Positive

  • None.

Negative

  • None.

Insights

Madryn discloses a 30.3% stake and tightens its registration and voting arrangements with Neuronetics.

Madryn and related funds collectively report beneficial ownership of 20,737,061 Neuronetics common shares, representing approximately 30.3% of outstanding stock based on 68,485,922 shares as of October 29, 2025. Several Madryn entities share voting and dispositive power, with no sole voting authority reported.

The amended Registration Rights Agreement provides registration and piggyback rights over the Madryn parties’ consideration shares. It also includes a commitment that the Madryn parties will not acquire additional equity or convertible debt, which limits future accumulation of Neuronetics securities under this arrangement.

Under the Second Amendment, Madryn agrees at the company’s 2026 annual meeting to vote all its shares in line with the board’s recommendations on certain proposals. This aligns a large shareholder’s votes with the board for that meeting, while future effects depend on subsequent company disclosures and any further amendments.






Matthew Girandola
Chief Compliance Officer, 330 Madison Avenue Floor 33
New York, NY, 10017
(646) 560-5490

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)
03/02/2026

(Date of Event Which Requires Filing of This Statement)


If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D






SCHEDULE 13D




Comment for Type of Reporting Person:
OO


SCHEDULE 13D


MADRYN ASSET MANAGEMENT, LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN HEALTH PARTNERS II, LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN HEALTH PARTNERS II (CAYMAN MASTER), LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN HEALTH ADVISORS II, LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN HEALTH ADVISORS GP II, LLC
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN SELECT OPPORTUNITIES, LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN SELECT ADVISORS, LP
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
MADRYN SELECT ADVISORS GP, LLC
Signature:/s/ Matthew Girandola
Name/Title:Matthew Girandola / Chief Compliance Officer
Date:03/04/2026
Comments accompanying signature:
In accordance with Rule 13d-1(k)(1)(iii) under the Securities Exchange Act of 1934, as amended, the persons named above agree to the joint filing on behalf of each of them of this Statement on Schedule 13D with respect to the Common Stock.

FAQ

What stake do Madryn-related funds report in Neuronetics (STIM)?

Madryn-related funds report beneficial ownership of 20,737,061 Neuronetics common shares. This represents a significant holding and makes them a major shareholder. The filing groups multiple Madryn entities, all reflecting shared voting and dispositive power over these shares under a coordinated Schedule 13D/A amendment.

What percentage of Neuronetics’ outstanding shares does Madryn’s position represent?

Madryn’s aggregated position represents approximately 30.3% of Neuronetics’ outstanding common stock. This percentage is calculated using 68,485,922 shares outstanding as of October 29, 2025, reported in Neuronetics’ Form 10-Q, highlighting Madryn as a substantial, influential shareholder in the company.

What registration rights were granted to Madryn in relation to Neuronetics (STIM) shares?

Madryn parties hold registration rights under a Registration Rights Agreement and its amendments for their consideration shares. They also receive piggyback rights when Neuronetics or other holders register stock, subject to customary cutbacks. These provisions facilitate potential resale of Madryn’s Neuronetics holdings through future registration statements.

What did Madryn agree to regarding additional Neuronetics securities?

Madryn parties agreed not to acquire additional Neuronetics equity or debt securities convertible into equity. This commitment, described in the filing, limits further accumulation of voting power by Madryn under the current arrangements, helping define the scope of their long-term ownership position in the company.

How will Madryn vote its Neuronetics shares at the 2026 annual meeting?

Under the Second Amendment to the Registration Rights Agreement, Madryn parties agree to vote all Neuronetics common shares they own at the 2026 annual meeting in accordance with the board’s voting recommendations on certain proposals, aligning their votes with management for that specific meeting.

Which Madryn entities are listed as reporting persons for Neuronetics (STIM)?

Reporting persons include Madryn Asset Management and several affiliated funds and advisor entities, such as Madryn Health Partners II, Madryn Health Partners II (Cayman Master), Madryn Health Advisors II, Madryn Select Opportunities, Madryn Select Advisors, and related general partner LLCs, all collectively reporting shared beneficial ownership and coordinated filing.
Neuronetics

NASDAQ:STIM

STIM Rankings

STIM Latest News

STIM Latest SEC Filings

STIM Stock Data

86.98M
36.67M
Medical Devices
Surgical & Medical Instruments & Apparatus
Link
United States
MALVERN