Mark Stolper insider trades: RadNet (RDNT) stock buys and sales
Trades on the price chart
Daily close, with an arrow on each day they bought or sold
Companies
Where Mark reports to the SEC
and 3 more companies
Open-market buys and sales
19 trades reported on SEC Form 4, newest first
| Date | Stock | Type | Shares | Price | Value | Holding | Reported |
|---|---|---|---|---|---|---|---|
| Sep 16, 2025 | RDNT | ↓ Sell | 35,000 | $73.89 | $2.6M | Direct | Sep 18, 2025 (2d) |
| Jun 10, 2024 | RDNT | ↓ Sell | 25,000 | $61.27 | $1.5M | Direct | Jun 12, 2024 (2d) |
| Feb 1, 2021 | SRGA | ↑ Buy | 16,667 | $1.50 | $25K | Direct | Feb 2, 2021 (1d) |
| Aug 15, 2019 | RDNT | ↓ Sell | 20,703 | $15.15 | $314K | Direct | Aug 16, 2019 (1d) |
| Mar 18, 2019 | RDNT | ↓ Sell | 15,000 | $14.99 | $225K | Direct | Mar 20, 2019 (2d) |
| Mar 20, 2018 | RDNT | ↓ Sell | 15,000 | $13.19 | $198K | Direct | Mar 20, 2018 (0d) |
| Aug 30, 2017 | RDNT | ↓ Sell | 10,000 | $10.19 | $102K | Direct | Aug 30, 2017 (0d) |
| May 24, 2017 | RDNT | ↓ Sell | 15,000 | $7.33 | $110K | Direct | May 24, 2017 (0d) |
| May 5, 2017 | RTIX | ↑ Buy | 5,000 | $4.57 | $23K | Direct | May 9, 2017 (4d) |
| Aug 12, 2016 | RDNT | ↓ Sell | 35,414 | $6.25 | $221K | Direct | Aug 12, 2016 (0d) |
| Dec 3, 2015 | RDNT | ↓ Sell | 19,187 | $6.18 | $119K | Direct | Dec 3, 2015 (0d) |
| May 20, 2015 | RDNT | ↓ Sell | 50,000 | $6.86 | $343K | Direct | May 22, 2015 (2d) |
| May 13, 2014 | RDNT | ↓ Sell | 75,000 | $6.47 | $485K | Direct | May 13, 2014 (0d) |
| Aug 29, 2013 | HSON | ↑ Buy | 500 | $2.68 | $1K | Direct | Oct 21, 2014 (418d) |
| May 23, 2013 | RDNT | ↓ Sell | 75,000 | $2.43 | $183K | Direct | May 23, 2013 (0d) |
| Sep 21, 2009 | RDNT | ↓ Sell | 22,200 | $2.36 | $52K | Direct | Sep 22, 2009 (1d) |
| Sep 18, 2009 | RDNT | ↓ Sell | 77,800 | $2.33 | $182K | Direct | Sep 21, 2009 (3d) |
| Sep 17, 2009 | RDNT | ↓ Sell | 69,215 | $2.38 | $165K | Direct | Sep 21, 2009 (4d) |
| Sep 16, 2009 | RDNT | ↓ Sell | 30,785 | $2.35 | $72K | Direct | Sep 18, 2009 (2d) |
Each row is one filing's trades in one stock, summed. Shares and prices are as filed, before any later stock split.
Other RDNT insiders
Open-market trades in the last 12 months
About Mark Stolper's insider trades
Mark Stolper is EVP, Chief Financial Officer at RadNet (RDNT). Since Sep 16, 2009, Mark has reported 3 open-market purchases worth $49K and 16 sales worth $6.9M on SEC Form 4. There have been no open-market trades in the last 12 months.
Their filings also include grants and awards (38 filings), other transactions (10 filings), option exercises (6 filings), shares withheld for taxes (5 filings). These aren't open-market trades and aren't counted above.
How to read insider trades
Officers, directors and owners of more than 10% of a company must report trades in its stock on SEC Form 4, usually within two business days. Purchases with their own money are the stronger signal: insiders sell for many reasons (taxes, diversification, a house), but buy for one. See every RDNT insider trade, the latest insider trades across the market, or cluster buys, when several insiders buy the same stock within days.