NEURONETICS INC (STIM) 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 June 30, 2026. The institutional investors covered on this page collectively reported approximately $47.68M 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 $24.10M in its June 30, 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 $53.77M, representing an estimated gain of +123.08% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 84% of the total disclosed STIM value among the investors covered in this analysis. Major shareholders include Madryn Asset Management, Lp, Ubs Group Ag, Wexford Capital Lp, 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
84
Total Reported Value
$47.68M
Largest Holder
Madryn Asset Management, Lp
Largest Position
$24.10M
Insider Transactions (90d)
3
Latest Filing Quarter
Q2 2026
New Institutional Positions
134
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 | 65.29% | 18,540,488 | $24,102,634 | $53,767,415 | +$29,664,781 | +123.08% | |
| Ubs Group Ag | 0.00% | 2,279,099 | $2,962,829 | $6,609,387 | +$3,646,558 | +123.08% | |
| Wexford Capital Lp | 0.36% | 2,002,625 | $2,603,413 | $5,807,613 | +$3,204,200 | +123.08% | |
| Fourworld Capital Management Llc | 2.62% | 1,744,142 | $2,267,385 | $5,058,012 | +$2,790,627 | +123.08% | |
| Lane Generational Llc | 1.86% | 1,633,372 | $2,123,384 | $4,736,779 | +$2,613,395 | +123.08% | |
| Vanguard Capital Management Llc | 0.00% | 1,507,097 | $1,959,226 | $4,370,581 | +$2,411,355 | +123.08% | |
| Masters Capital Management Llc | 0.18% | 1,000,000 | $1,300,000 | $2,900,000 | +$1,600,000 | +123.08% | |
| Advisorshares Investments Llc | 0.12% | 742,795 | $965,634 | $2,154,106 | +$1,188,472 | +123.08% | |
| Ikarian Capital, Llc | 0.15% | 701,182 | $911,537 | $2,033,428 | +$1,121,891 | +123.08% | |
| Blackrock, Inc. | 0.00% | 596,622 | $775,608 | $1,730,204 | +$954,596 | +123.08% | |
| Marshall Wace, Llp | 0.00% | 485,692 | $631,400 | $1,408,507 | +$777,107 | +123.08% | |
| Geode Capital Management, Llc | 0.00% | 458,474 | $596,242 | $1,329,575 | +$733,333 | +122.99% | |
| Citadel Advisors Llc | 0.00% | 421,903 | $548,474 | $1,223,519 | +$675,045 | +123.08% | |
| Dauntless Investment Group, Llc | 0.83% | 369,187 | $479,943 | $1,070,642 | +$590,699 | +123.08% | |
| State Street Corp | 0.00% | 290,299 | $377,389 | $841,867 | +$464,478 | +123.08% | |
| Centiva Capital, Lp | 0.01% | 285,913 | $371,687 | $829,148 | +$457,461 | +123.08% | |
| Vanguard Fiduciary Trust Co | 0.00% | 264,734 | $344,154 | $767,729 | +$423,575 | +123.08% | |
| Goldman Sachs Group Inc | 0.00% | 264,088 | $343,314 | $765,855 | +$422,541 | +123.08% | |
| Jbf Capital, Inc. | 0.04% | 233,166 | $303,116 | $676,181 | +$373,065 | +123.08% | |
| Xtx Topco Ltd | 0.00% | 220,323 | $286,420 | $638,937 | +$352,517 | +123.08% | |
| Millennium Management Llc | 0.00% | 199,450 | $259,285 | $578,405 | +$319,120 | +123.08% | |
| Boothbay Fund Management, Llc | 0.00% | 189,263 | $246,042 | $548,863 | +$302,821 | +123.08% | |
| Susquehanna International Group, Llp | 0.00% | 185,753 | $241,479 | $538,684 | +$297,205 | +123.08% | |
| Jane Street Group, Llc | 0.00% | 185,250 | $240,825 | $537,225 | +$296,400 | +123.08% | |
| Bnp Paribas Financial Markets | 0.00% | 148,815 | $193,460 | $431,564 | +$238,104 | +123.08% | |
| Tudor Investment Corp Et Al | 0.00% | 124,861 | $162,319 | $362,097 | +$199,778 | +123.08% | |
| Aqr Capital Management Llc | 0.00% | 117,822 | $153,168 | $341,684 | +$188,516 | +123.08% | |
| Adar1 Capital Management, Llc | 0.01% | 100,000 | $130,000 | $290,000 | +$160,000 | +123.08% | |
| Bridgeway Capital Management, Llc | 0.00% | 95,205 | $123,767 | $276,095 | +$152,328 | +123.08% | |
| Squarepoint Ops Llc | 0.00% | 94,616 | $123,001 | $274,386 | +$151,385 | +123.08% | |
| Northern Trust Corp | 0.00% | 89,138 | $115,880 | $258,500 | +$142,620 | +123.08% | |
| Hrt Financial Lp | 0.00% | 88,710 | $115,000 | $257,259 | +$142,259 | +123.70% | |
| Gamco Investors, Inc. Et Al | 0.00% | 79,200 | $102,960 | $229,680 | +$126,720 | +123.08% | |
| Invesco Ltd. | 0.00% | 68,340 | $88,842 | $198,186 | +$109,344 | +123.08% | |
| Bank Of America Corp | 0.00% | 68,195 | $88,653 | $197,766 | +$109,113 | +123.08% | |
| Morgan Stanley | 0.00% | 62,893 | $81,762 | $182,390 | +$100,628 | +123.07% | |
| Engineers Gate Manager Lp | 0.00% | 57,175 | $74,328 | $165,808 | +$91,480 | +123.08% | |
| Vestgen Advisors, Llc | 0.00% | 50,279 | $65,363 | $145,809 | +$80,446 | +123.08% | |
| Cruiser Capital Advisors, Llc | 0.04% | 48,900 | $63,570 | $141,810 | +$78,240 | +123.08% | |
| Caitong International Asset Management Co., Ltd | 0.01% | 41,320 | $53,716 | $119,828 | +$66,112 | +123.08% | |
| Arax Advisory Partners | 0.00% | 39,843 | $51,796 | $115,545 | +$63,749 | +123.08% | |
| Hsbc Holdings Plc | 0.00% | 37,847 | $49,958 | $109,756 | +$59,798 | +119.70% | |
| Gabelli Funds Llc | 0.00% | 38,000 | $49,400 | $110,200 | +$60,800 | +123.08% | |
| Pathstone Holdings, Llc | 0.00% | 32,231 | $46,735 | $93,470 | +$46,735 | +100.00% | |
| Quadrature Capital Ltd | 0.00% | 30,856 | $40,113 | $89,482 | +$49,369 | +123.08% | |
| Virtu Financial Llc | 0.00% | 29,582 | $38,000 | $85,788 | +$47,788 | +125.76% | |
| David J Yvars Group | 0.02% | 27,550 | $35,815 | $79,895 | +$44,080 | +123.08% | |
| Price T Rowe Associates Inc | 0.00% | 24,246 | $32,000 | $70,313 | +$38,313 | +119.73% | |
| State Of Wyoming | 0.00% | 23,482 | $30,527 | $68,098 | +$37,571 | +123.07% | |
| Qube Research & Technologies Ltd | 0.00% | 23,211 | $30,174 | $67,312 | +$37,138 | +123.08% |
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.