Security key
64131A105
Neuronetics, Inc. - Common Stock, $0.01 par value (STIM)
CUSIP: 64131A105
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, $0.01 par value
- Total 13F shares
- 41,645,979
- Total 13F value
- $60,363,694
- Share change
- -567,637
- Put/Call ratio
- 64%
- SEC-reported price per share
- $1.45
- Number of holders
- 99
- Value change
- -$718,050
- Number of buys
- 48
- Number of sells
- 44
- Shares outstanding
- 76,170,891
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
99
Top holders
10
STIM full security history
Ownership snapshot
Full 13F holder table
Neuronetics, Inc. SEC filings
Neuronetics, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of STIM - Neuronetics, Inc. - Common Stock, $0.01 par value (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
15/15
Latest evidence
23 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 30%
13D/G row: Madryn Asset Management, LP
Showing 1-6 of 15 holder rows.
Quick read
Madryn Asset Management, LP leads the comparable SEC ownership view at 30%.
15 of 15 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
9.9%
Keith J. Sullivan
2.1%
Daniel L. Reuvers
2%
William Andrew Macan
1.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Madryn Asset Management, LP |
13D/G
13F
Company
|
30%
|
$32,764,556
20,737,061 shares
|
$0 | 02 Mar 2026 |
| Jorey Chernett |
13D/G
Chernett Jorey
|
9.9%
|
—
6,827,031 shares
|
$0 | 30 Jan 2026 |
| Keith J. Sullivan |
3/4/5
Former Officer & Director
|
2.1%
|
$2,131,838
1,590,924 shares
|
-$192,798 | 19 Mar 2026 |
| Daniel L. Reuvers |
3/4/5
President and CEO
|
2%
|
$1,905,000
1,500,000 shares
|
— | 23 Mar 2026 |
| William Andrew Macan |
3/4/5
EVP, CLO and CS
|
1.2%
|
$1,202,341
897,270 shares
|
-$55,589 | 19 Mar 2026 |
| Steven Pfanstiel |
3/4/5
Former EVP, CFO and Treasurer
|
1.1%
|
$1,121,101
836,643 shares
|
-$11,482 | 19 Mar 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.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
99
Shares
41,645,979
Rows available
99
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
99
Q1 2026 holders
99
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|