Neuronetics STIM Insider Ownership

Updated Oct 10, 2026

Over the trailing 12 months, STIM insiders bought $4.81 million worth of shares (3.62Mn shares) and sold $281,887 worth (192.21K shares) in open-market trades.

• Counted by insider, open-market buying of STIM stock in the past 12 months came from one insider and selling from 3 insiders.
• Among STIM's insiders, Jorey Chernett (10% owner) was the top open-market buyer in the past 12 months, with $4.81 million of stock purchased (3.62Mn shares) and the latest purchase on August 14, 2026.
• Meanwhile, the largest open-market sales of STIM in the past 12 months were by Keith J. Sullivan (President and CEO), totaling $192,798 (129.56K shares), most recently on March 19, 2026.
• Outside the open market, Neuronetics insiders received 3.06Mn shares in stock awards over the past 12 months.
• According to Business Quant data, insiders at Neuronetics reported 21.63Mn shares in total in their latest Form 4 filings, up 2.60% from 21.08Mn shares at the end of Q2 2026.
• Indirect holdings, through trusts, partnerships, family members and other entities, make up 10.49% (2.27Mn shares) of Neuronetics' insider total, with the other 89.51% (19.36Mn shares) held directly.
• STIM's insider total is spread across 14 insiders who have filed a Form 4 in the past two years.
• STIM's three largest insider shareholders, per their latest Form 4 filings, are Jorey Chernett (10% owner, 10.6Mn shares), Madryn Asset Management, LP (10% owner, 2.27Mn shares) and Keith J. Sullivan (1.59Mn shares).
• The holding of Jorey Chernett makes up 49.02% of all shares held by Neuronetics insiders.
• Institutions accounted for 48.85% of STIM's outstanding shares in Q2 2026, insiders about 28.39% per their latest Form 4 filings, and other investors, including the public, about 22.76%.
• In the past year, 13 insiders of Neuronetics submitted 43 Form 4 filings reporting trades, awards or other transactions.
• The insider data for STIM reflects Form 4 filings through August 17, 2026.