X0306 4 2019-04-08 0 0001227636 Neuronetics, Inc. STIM 0001744956 Thatcher Christopher C/O NEURONETICS, INC. 3222 PHOENIXVILLE PIKE MALVERN PA 19355 1 1 0 0 President and CEO Common Stock 2019-04-08 4 M 0 15000 0.87 A 69811 D Common Stock 2019-04-08 4 S 0 15000 16.82 D 54811 D Employee Stock Option (Right to Buy) 0.87 2019-04-08 4 M 0 15000 0.00 D 2025-02-18 Common Stock 15000 375297 D These shares were sold in compliance with a trading plan adopted by the reporting person pursuant to Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $16.545 to $16.955 inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4. Ten percent (10%) of the shares subject to the option vested on February 19, 2015, Twenty-five percent (25%) of the shares subject to the option vested on November 1, 2015, and one thirty-sixth (1/36th) of the remaining shares subject to the option vested or shall vest each month thereafter, subject to Reporting Person continuing to provide service through each such date. /s/ Michael Schaeppi, Attorney-in-Fact 2019-04-08