NEURONETICS INC (STIM) Top Institutional Shareholders
NEURONETICS INC (STIM) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $60.14M in STIM holdings during the latest filing period.
Madryn Asset Management, Lp is currently the largest disclosed institutional shareholder of STIM tracked by InsiderSet, reporting ownership valued at approximately $26.79M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $22.36M, representing an estimated loss of -16.55% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 83% of the total disclosed STIM value among the investors covered in this analysis. Major shareholders include Madryn Asset Management, Lp, Ubs Group Ag, Balyasny Asset Management L.P., and several other long-term asset managers with concentrated positions in NEURONETICS INC (STIM).
This page ranks the largest institutional STIM shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
97
Total Reported Value
$60.14M
Largest Holder
Madryn Asset Management, Lp
Largest Position
$26.79M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
123
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Madryn Asset Management, Lp | 78.50% | 18,475,893 | $26,790,045 | $22,355,831 | -$4,434,214 | -16.55% | |
| Ubs Group Ag | 0.00% | 2,870,598 | $4,162,367 | $3,473,424 | -$688,943 | -16.55% | |
| Balyasny Asset Management L.P. | 0.01% | 2,743,768 | $3,978,464 | $3,319,959 | -$658,505 | -16.55% | |
| Blackrock, Inc. | 0.00% | 2,318,537 | $3,361,879 | $2,805,430 | -$556,449 | -16.55% | |
| Vanguard Capital Management Llc | 0.00% | 2,047,975 | $2,969,564 | $2,478,050 | -$491,514 | -16.55% | |
| Lane Generational Llc | 2.05% | 1,774,624 | $2,573,205 | $2,147,295 | -$425,910 | -16.55% | |
| Fourworld Capital Management Llc | 1.18% | 1,489,322 | $2,159,517 | $1,802,080 | -$357,437 | -16.55% | |
| Masters Capital Management Llc | 0.21% | 1,000,000 | $1,450,000 | $1,210,000 | -$240,000 | -16.55% | |
| Geode Capital Management, Llc | 0.00% | 958,989 | $1,390,770 | $1,160,377 | -$230,393 | -16.57% | |
| State Street Corp | 0.00% | 842,547 | $1,221,693 | $1,019,482 | -$202,211 | -16.55% | |
| Ikarian Capital, Llc | 0.15% | 701,182 | $1,016,714 | $848,430 | -$168,284 | -16.55% | |
| Wexford Capital Lp | 0.17% | 700,961 | $1,016,393 | $848,163 | -$168,230 | -16.55% | |
| Advisorshares Investments Llc | 0.16% | 617,193 | $894,930 | $746,804 | -$148,126 | -16.55% | |
| Hightower Advisors, Llc | 0.00% | 562,370 | $815,437 | $680,468 | -$134,969 | -16.55% | |
| Northern Trust Corp | 0.00% | 277,378 | $402,198 | $335,627 | -$66,571 | -16.55% | |
| Dauntless Investment Group, Llc | 1.10% | 269,208 | $390,352 | $325,742 | -$64,610 | -16.55% | |
| Vanguard Fiduciary Trust Co | 0.00% | 258,034 | $374,149 | $312,221 | -$61,928 | -16.55% | |
| Goldman Sachs Group Inc | 0.00% | 233,590 | $338,705 | $282,644 | -$56,061 | -16.55% | |
| Jbf Capital, Inc. | 0.05% | 233,166 | $338,091 | $282,131 | -$55,960 | -16.55% | |
| Vanguard Portfolio Management Llc | 0.00% | 221,170 | $320,697 | $267,616 | -$53,081 | -16.55% | |
| Massar Capital Management, Lp | 0.06% | 221,000 | $320,450 | $267,410 | -$53,040 | -16.55% | |
| Boothbay Fund Management, Llc | 0.01% | 189,263 | $274,431 | $229,008 | -$45,423 | -16.55% | |
| Centiva Capital, Lp | 0.01% | 169,319 | $245,513 | $204,876 | -$40,637 | -16.55% | |
| Xtx Topco Ltd | 0.00% | 146,155 | $211,925 | $176,848 | -$35,077 | -16.55% | |
| Nuveen, Llc | 0.00% | 123,089 | $178,479 | $148,938 | -$29,541 | -16.55% | |
| Aqr Capital Management Llc | 0.00% | 116,680 | $169,187 | $141,183 | -$28,004 | -16.55% | |
| Citizens Financial Group Inc/Ri | 0.00% | 110,953 | $160,882 | $134,253 | -$26,629 | -16.55% | |
| Adar1 Capital Management, Llc | 0.01% | 100,000 | $145,000 | $121,000 | -$24,000 | -16.55% | |
| Bank Of America Corp | 0.00% | 98,095 | $142,238 | $118,695 | -$23,543 | -16.55% | |
| Royal Bank Of Canada | 0.00% | 95,848 | $140,000 | $115,976 | -$24,024 | -17.16% | |
| Bridgeway Capital Management, Llc | 0.00% | 95,205 | $138,047 | $115,198 | -$22,849 | -16.55% | |
| Vestgen Advisors, Llc | 0.00% | 100,413 | $127,525 | $121,500 | -$6,025 | -4.72% | |
| Susquehanna International Group, Llp | 0.00% | 86,481 | $125,397 | $104,642 | -$20,755 | -16.55% | |
| Charles Schwab Investment Management Inc | 0.00% | 82,123 | $119,078 | $99,369 | -$19,709 | -16.55% | |
| Gamco Investors, Inc. Et Al | 0.00% | 79,200 | $114,840 | $95,832 | -$19,008 | -16.55% | |
| Bank Of New York Mellon Corp | 0.00% | 78,605 | $113,977 | $95,112 | -$18,865 | -16.55% | |
| Citadel Advisors Llc | 0.00% | 76,597 | $111,066 | $92,682 | -$18,384 | -16.55% | |
| Sei Investments Co | 0.00% | 76,046 | $110,267 | $92,016 | -$18,251 | -16.55% | |
| Invesco Ltd. | 0.00% | 72,382 | $104,954 | $87,582 | -$17,372 | -16.55% | |
| Citigroup Inc | 0.00% | 56,628 | $82,110 | $68,520 | -$13,590 | -16.55% | |
| Cruiser Capital Advisors, Llc | 0.03% | 48,900 | $70,905 | $59,169 | -$11,736 | -16.55% | |
| Deutsche Bank Ag\ | 0.00% | 45,793 | $66,400 | $55,410 | -$10,990 | -16.55% | |
| Rhumbline Advisers | 0.00% | 41,843 | $60,667 | $50,630 | -$10,037 | -16.54% | |
| Morgan Stanley | 0.00% | 40,073 | $58,107 | $48,488 | -$9,619 | -16.55% | |
| Arax Advisory Partners | 0.00% | 39,123 | $56,728 | $47,339 | -$9,389 | -16.55% | |
| Gabelli Funds Llc | 0.00% | 38,000 | $55,100 | $45,980 | -$9,120 | -16.55% | |
| Squarepoint Ops Llc | 0.00% | 37,616 | $54,543 | $45,515 | -$9,028 | -16.55% | |
| Pathstone Holdings, Llc | 0.00% | 32,231 | $46,735 | $39,000 | -$7,735 | -16.55% | |
| Schonfeld Strategic Advisors Llc | 0.00% | 31,751 | $46,037 | $38,419 | -$7,618 | -16.55% | |
| Alliancebernstein L.P. | 0.00% | 28,800 | $39,744 | $34,848 | -$4,896 | -12.32% |
Frequently asked questions about STIM
Who owns the most STIM stock?
The largest holders of STIM are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for NEURONETICS INC (STIM).
Is STIM widely held by superinvestors?
Many widely followed stocks like STIM appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly STIM is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.