Sec Form 4 Filing - Madryn Asset Management, LP @ Neuronetics, Inc. - 2026-05-28

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

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, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Madryn Asset Management, LP 2. Issuer Name and Ticker or Trading Symbol Neuronetics, Inc. [ STIM] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director X __ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 330 MADISON AVENUE - FLOOR 33 3. Date of Earliest Transaction (MM/DD/YY) 05/28/2026 (Street) NEW YORK, NY10017 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 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 05/28/2026 J( 1 ) 2,071 A $ 0 1,433,024 ( 1 ) ( 2 ) I See Footnotes ( 3 ) ( 4 ) Common Stock 05/28/2026 J( 1 ) 24,658 A $ 0 17,069,598 ( 1 ) ( 5 ) I See Footnotes ( 3 ) ( 4 ) Common Stock 05/28/2026 J( 1 ) 3,271 A $ 0 2,264,439 ( 1 ) ( 6 ) I See Footnotes ( 4 ) ( 7 ) Common Stock 06/15/2026 J( 8 ) 2,934 A $ 0 1,435,958 ( 1 ) ( 2 ) I See Footnotes ( 3 ) ( 4 ) Common Stock 06/15/2026 J( 8 ) 34,932 A $ 0 17,104,530 ( 1 ) ( 5 ) I See Footnotes ( 3 ) ( 4 ) Common Stock 06/15/2026 J( 8 ) 4,634 A $ 0 2,269,073 ( 1 ) ( 6 ) I See Footnotes ( 4 ) ( 7 )

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 (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 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 (MM/DD/YY) 7. Title and Amount of Underlying Securities (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 of Derivative Security: 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

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Madryn Asset Management, LP 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X Madryn Health Partners II, LP 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X MADRYN HEALTH PARTNERS II (CAYMAN MASTER), LP 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X MADRYN HEALTH ADVISORS II, LP 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X MADRYN HEALTH ADVISORS GP II, LLC 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X Madryn Select Opportunities, LP 330 MADISON AVENUE - FLOOR 33 NEW YORK, NY10017 X Signatures /s/ Matthew Girandola, as Authorized Signatory for Madryn Asset Management, LP 06/17/2026 Signature of Reporting Person Date /s/ Matthew Girandola, as Authorized Signatory for Madryn Health Partners II, LP 06/17/2026 Signature of Reporting Person Date /s/ Matthew Girandola, as Authorized Signatory for Madryn Health Partners II (Cayman Master), LP 06/17/2026 Signature of Reporting Person Date /s/ Matthew Girandola, as Authorized Signatory for Madryn Health Advisors II, LP 06/17/2026 Signature of Reporting Person Date /s/ Matthew Girandola, as Authorized Signatory for Madryn Health Advisors GP II, LLC 06/17/2026 Signature of Reporting Person Date /s/ Matthew Girandola, as Authorized Signatory for Madryn Select Opportunities, LP 06/17/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Represents restricted stock units ("RSU") awarded to Avinash Amin as director compensation. Each RSU represents a contingent right to receive one share of the Issuer's common stock. Pursuant to the partnership agreements of each of Madryn Health Partners II, LP ("Health Partners"), Madryn Health Partners II (Cayman Master), LP ("Cayman Master") and Madryn Select Opportunities, LP ("Select Opportunities" and, together with Health Partners and Cayman Master, the "Madryn Funds"), Avinash Amin is deemed to hold the RSU for the benefit of the Madryn Funds, who are entitled to the shares of common stock underlying the RSUs upon vesting. ( 2 )Represents shares of common stock held by Health Partners, for which Madryn Asset Management, LP ("Madryn") serves as the investment advisor. ( 3 )Madryn Health Advisors II, LP ("Health Advisors"), as general partner of Health Partners and Cayman Master, and Madryn Health Advisors GP II, LLC, as general partner of Health Advisors, may be deemed to beneficially own the shares held directly by Health Partners and Cayman Master. ( 4 )Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest. ( 5 )Represents shares of common stock held by Cayman Master, for which Madryn serves as the investment advisor. ( 6 )Represents shares of common stock held by Select Opportunities, for which Madryn serves as the investment advisor. ( 7 )Madryn Select Advisors, LP ("Select Advisors"), as general partner of Select Opportunities, and Madryn Select Advisors GP, LLC, as general partner of Select Advisors, may be deemed to beneficially own the shares held directly by Select Opportunities. ( 8 )The reported transactions involved a transfer of shares received by Avinash Amin as director compensation to each of the Madryn Funds as provided for in the respective partnership agreement of each Madryn Fund. Each transfer was made for no consideration.

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).

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