Comparable stake leader
Madryn Asset Management, LP
SEC ownership of Neuronetics, Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001227636.
Disclosed value leader
Madryn Asset Management, LP
Comparable rows
50/50
Latest evidence
15 Jun 2026
- Public ticker
- STIM on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Madryn Asset Management, LP
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Madryn Asset Management, LP
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
15 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001227636
- Issuer location
- Malvern, PA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Neuronetics, Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Madryn Asset Management, LP
Disclosed value leader
Madryn Asset Management, LP
Comparable rows
50/50
Latest evidence
15 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 30%
13D/G row: Madryn Asset Management, LP
Showing 1-8 of 50 holder rows.
Quick read
Madryn Asset Management, LP leads the comparable SEC ownership view at 30%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Madryn Asset Management, LP's linked filing trail.
Comparable ownership
Top 5
Madryn Asset Management, LP
30%
Jorey Chernett
15%
MADRYN HEALTH ADVISORS GP II, LLC
3.3%
MADRYN HEALTH ADVISORS II, LP
3.3%
MADRYN HEALTH PARTNERS II (CAYMAN...
3.3%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Madryn Asset Management, LP |
13D/G
3/4/5
13F
10%+ Owner · Company
|
30%
|
$32,764,556
20,737,061 shares
|
$0 | 02 Mar 2026 |
| Jorey Chernett |
13D/G
3/4/5
Chernett Jorey · 10%+ Owner
|
15%
|
$17,308,540
10,553,988 shares
|
+$1,271,443 | 19 May 2026 |
| MADRYN HEALTH ADVISORS GP II, LLC |
3/4/5
10%+ Owner
|
3.3%
|
$3,290,155
2,269,073 shares
|
— | 28 May 2026 |
| MADRYN HEALTH ADVISORS II, LP |
3/4/5
10%+ Owner
|
3.3%
|
$3,290,155
2,269,073 shares
|
— | 28 May 2026 |
| MADRYN HEALTH PARTNERS II (CAYMAN MASTER), LP |
3/4/5
10%+ Owner
|
3.3%
|
$3,290,155
2,269,073 shares
|
— | 28 May 2026 |
| Madryn Health Partners II, LP |
3/4/5
10%+ Owner
|
3.3%
|
$3,290,155
2,269,073 shares
|
— | 28 May 2026 |
| Madryn Select Opportunities, LP |
3/4/5
10%+ Owner
|
3.3%
|
$3,290,155
2,269,073 shares
|
— | 28 May 2026 |
| Sasha Cucuz |
3/4/5
Director
|
3%
|
$2,988,338
2,060,924 shares
|
— | 28 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$8,576,161.
Buys
$4,703,708
Insiders: 1
Sells
$13,279,869
Insiders: 4
Net
-$8,576,161
Shares: -107,465
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 3,568,314
Shares: 3,675,779
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 775,000 | 0 | $1,062,500 | $0 | +$1,062,500 |
| 3-6 | 2,793,314 | 175,779 | $3,641,208 | $259,869 | +$3,381,339 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 3,500,000 | $0 | $13,020,000 | -$13,020,000 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 24 reporting-owner rows connected to Neuronetics, Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
24
Largest Forms 3/4/5 holder
Jorey Chernett
Net 12M change
-$8,576,161
Latest report
15 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Jorey Chernett | 10%+ Owner | $12,348,165 | +$4,703,708 | +62% | Filing P/S | 19 May 2026 |
| CANNELL CAPITAL LLC | 10%+ Owner | $8,211,134 | Mixed | 01 Jun 2023 | ||
| Madryn Select Opportunities, LP | 10%+ Owner | $3,290,155 | Median | 28 May 2026 | ||
| MADRYN HEALTH ADVISORS GP II, LLC | 10%+ Owner | $3,290,155 | Median | 28 May 2026 | ||
| MADRYN HEALTH ADVISORS II, LP | 10%+ Owner | $3,290,155 | Median | 28 May 2026 | ||
| MADRYN HEALTH PARTNERS II (CAYMAN MASTER), LP | 10%+ Owner | $3,290,155 | Median | 28 May 2026 | ||
| Madryn Health Partners II, LP | 10%+ Owner | $3,290,155 | Median | 28 May 2026 | ||
| Madryn Asset Management, LP | 10%+ Owner | $3,290,155 | -$13,020,000 | -80% | Median | 28 May 2026 |
| Sasha Cucuz | Director | $2,988,338 | Median | 28 May 2026 | ||
| Keith J. Sullivan | Former Officer & Director | $2,131,838 | -$192,798 | -8.3% | Filing P/S | 19 Mar 2026 |
| Stephen Furlong | EVP, CFO and Treasurer | $2,058,620 | Mixed | 12 May 2025 | ||
| Daniel L. Reuvers | President and CEO | $1,905,000 | Mixed | 23 Mar 2026 | ||
| William Andrew Macan | EVP, CLO and CS | $1,202,341 | -$55,589 | -4.4% | Filing P/S | 19 Mar 2026 |
| Steven Pfanstiel | Former EVP, CFO and Treasurer | $1,121,101 | -$11,482 | -1% | Filing P/S | 19 Mar 2026 |
| Robert Cascella | Director | $906,274 | Median | 28 May 2026 | ||
| Glenn P. Muir | Director | $582,633 | Median | 28 May 2026 | ||
| Wilfred E. Jaeger | Director | $437,859 | Mixed | 25 May 2023 | ||
| Sheryl L. Conley | Director | $364,988 | Median | 28 May 2026 | ||
| John K. Bakewell | Director | $361,352 | Mixed | 24 May 2023 | ||
| Megan Rosengarten | Director | $247,790 | Median | 28 May 2026 |
Recent insider transactions for Neuronetics, Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Avinash Amin | STIM | Common Stock | Other | -58.6% | -42,500 | 30,000 | 15 Jun 2026 | Direct | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.25% | 42,500 | 17,104,530 | 15 Jun 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Madryn Asset Management, LP | STIM | Common Stock | Other | 0.18% | 30,000 | 17,069,598 | 28 May 2026 | See Footnotes | ||
| Megan Rosengarten | STIM | Common Stock | Award | 21.3% | 30,000 | 170,890 | 28 May 2026 | Direct | ||
| Glenn P. Muir | STIM | Common Stock | Award | 8.07% | 30,000 | 401,816 | 28 May 2026 | Direct | ||
| Sasha Cucuz | STIM | Common Stock | Award | 1.98% | 30,000 | 1,542,798 | 28 May 2026 | Direct | ||
| Sheryl L. Conley | STIM | Common Stock | Award | 13.5% | 30,000 | 251,716 | 28 May 2026 | Direct | ||
| Robert Cascella | STIM | Common Stock | Award | 6.16% | 36,250 | 625,017 | 28 May 2026 | Direct | ||
| Avinash Amin | STIM | Common Stock | Award | 70.6% | 30,000 | 72,500 | 28 May 2026 | Direct | ||
| Jorey Chernett | STIM | Common Stock | Purchase | 0.96% | $117,000 | $1.17 | 100,000 | 10,553,988 | 19 May 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 4.76% | $636,500 | $1.34 | 475,000 | 10,453,988 | 12 May 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 1.01% | $151,000 | $1.51 | 100,000 | 9,978,988 | 21 Apr 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 1.02% | $158,000 | $1.58 | 100,000 | 9,878,988 | 20 Apr 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 4.1% | $481,802 | $1.25 | 385,442 | 9,778,988 | 30 Mar 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 5.62% | $675,000 | $1.35 | 500,000 | 9,393,276 | 27 Mar 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 0.28% | $36,000 | $1.44 | 25,000 | 8,893,276 | 26 Mar 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 1.43% | $175,000 | $1.40 | 125,000 | 8,868,276 | 25 Mar 2026 | Direct |
| Daniel L. Reuvers | STIM | Common Stock | Award | 1,500,000 | 1,500,000 | 23 Mar 2026 | Direct | |||
| Jorey Chernett | STIM | Common Stock | Purchase | 1.98% | $238,956 | $1.41 | 169,472 | 8,743,276 | 20 Mar 2026 | Direct |
| Steven Pfanstiel | STIM | Common Stock | Sale | -1.01% | $11,482 | $1.34 | -8,569 | 836,643 | 19 Mar 2026 | Direct |
| Keith J. Sullivan | STIM | Common Stock | Sale | -2.83% | $62,027 | $1.34 | -46,289 | 1,590,924 | 19 Mar 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Sale | -1.75% | $21,447 | $1.34 | -16,005 | 897,270 | 19 Mar 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 5.54% | $598,500 | $1.33 | 450,000 | 8,573,804 | 19 Mar 2026 | Direct |
| Jorey Chernett | STIM | Common Stock | Purchase | 8.08% | $819,990 | $1.35 | 607,400 | 8,123,804 | 18 Mar 2026 | Direct |
| Keith J. Sullivan | STIM | Common Stock | Award | 7.38% | 112,500 | 1,637,213 | 17 Mar 2026 | Direct | ||
| William Andrew Macan | STIM | Common Stock | Award | 3.84% | 33,750 | 913,275 | 17 Mar 2026 | Direct | ||
| Steven Pfanstiel | STIM | Common Stock | Award | 3.05% | 25,000 | 845,212 | 17 Mar 2026 | Direct | ||
| Jorey Chernett | STIM | Common Stock | Purchase | 7.6% | $615,960 | $1.16 | 531,000 | 7,516,404 | 17 Mar 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Sale | -0.07% | $816 | $1.34 | -609 | 879,525 | 04 Mar 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Sale | -0.39% | $4,626 | $1.35 | -3,427 | 880,134 | 26 Feb 2026 | Direct |
| Keith J. Sullivan | STIM | Common Stock | Sale | -0.55% | $11,410 | $1.35 | -8,452 | 1,524,713 | 26 Feb 2026 | Direct |
| Steven Pfanstiel | STIM | Common Stock | Award | 43.8% | 250,000 | 820,212 | 23 Feb 2026 | Direct | ||
| William Andrew Macan | STIM | Common Stock | Award | 31.2% | 210,000 | 883,561 | 23 Feb 2026 | Direct | ||
| Keith J. Sullivan | STIM | Common Stock | Sale | -2.16% | $55,848 | $1.65 | -33,847 | 1,533,165 | 12 Feb 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Sale | -2.05% | $23,298 | $1.65 | -14,120 | 673,561 | 12 Feb 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Sale | -0.5% | $5,402 | $1.55 | -3,485 | 687,681 | 10 Feb 2026 | Direct |
| Keith J. Sullivan | STIM | Common Stock | Sale | -2.55% | $63,513 | $1.55 | -40,976 | 1,567,012 | 10 Feb 2026 | Direct |
| William Andrew Macan | STIM | Common Stock | Award | 31.2% | 164,361 | 691,166 | 30 Dec 2025 | Direct | ||
| Steven Pfanstiel | STIM | Common Stock | Award | 42.6% | 170,212 | 570,212 | 30 Dec 2025 | Direct | ||
| Robert Cascella | STIM | Common Stock | Award | 1.82% | 10,531 | 588,767 | 20 Oct 2025 | Direct |
* marks a reported price that did not pass the local price check.