- Corporate Officers - S
- Stolper Mark
Insider Trading History of Stolper Mark
The following table details the insider trading activities
(stock purchases, stock sales, and stock option exercises) of Stolper Mark since 2015.
This trader's CIK number is 1281961.
At the time of last reporting, Stolper Mark was the EVP, Chief Financial Officer of Radnet, Inc.. (stock ticker symbol RDNT).
Also see all insider trading activities at Radnet, Inc..
Note that in the past
STOLPER MARK also reported insider trading activities as an insider of the following companies:
Yearly summary of insider trading at Surgalign Holdings, Inc. (SRGA) by Stolper Mark
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2021 | SRGA | 16,667 | $25,000 | 0 | $0 | 0 | $0 |
Yearly summary of insider trading at Radnet, Inc. (RDNT) by Stolper Mark
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2025 | RDNT | 0 | $0 | 35,000 | $2,586,150 | 35,703 | $216,717 |
| 2024 | RDNT | 0 | $0 | 25,000 | $1,531,750 | 0 | $0 |
| 2019 | RDNT | 0 | $0 | 35,703 | $538,545 | 0 | $0 |
| 2018 | RDNT | 0 | $0 | 15,000 | $197,850 | 0 | $0 |
| 2017 | RDNT | 0 | $0 | 25,000 | $211,850 | 0 | $0 |
| 2016 | RDNT | 0 | $0 | 35,414 | $221,337 | 0 | $0 |
| 2015 | RDNT | 0 | $0 | 69,187 | $461,575 | 87,500 | $0 |
Yearly summary of insider trading at Rti Surgical, Inc. (RTIX) by Stolper Mark
| | Insider Buying | Insider Sales | Option Exercises |
|---|
| Year | Symbol | Shares | Value | Shares | Value | Shares | Value |
|---|
| 2017 | RTIX | 5,000 | $22,850 | 0 | $0 | 0 | $0 |
Insider trading activities at 3 companies by Stolper Mark:
1. Surgalign Holdings, Inc. (SRGA)
2. Radnet, Inc. (RDNT)
3. Rti Surgical, Inc. (RTIX)
Table 1. Insider trading of Surgalign Holdings, Inc. (SRGA) by Stolper Mark
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2021-02-01 | SRGA | Buy | 16,667 | 1.50 | 25,000 |
Table 2. Insider trading of Radnet, Inc. (RDNT) by Stolper Mark
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2025-12-10 | RDNT | Option Ex | 35,703 | 6.07 | 216,717 |
| 2025-09-16 | RDNT | Sale | 35,000 | 73.89 | 2,586,150 |
| 2024-06-10 | RDNT | Sale | 25,000 | 61.27 | 1,531,750 |
| 2019-08-15 | RDNT | Sale | 20,703 | 15.15 | 313,650 |
| 2019-03-18 | RDNT | Sale | 15,000 | 14.99 | 224,895 |
| 2018-03-20 | RDNT | Sale | 15,000 | 13.19 | 197,850 |
| 2017-08-30 | RDNT | Sale | 10,000 | 10.19 | 101,900 |
| 2017-05-24 | RDNT | Sale | 15,000 | 7.33 | 109,950 |
| 2016-08-12 | RDNT | Sale | 35,414 | 6.25 | 221,337 |
| 2015-12-03 | RDNT | Sale | 19,187 | 6.18 | 118,575 |
| 2015-05-20 | RDNT | Sale | 50,000 | 6.86 | 343,000 |
| 2015-04-15 | RDNT | Option Ex | 87,500 | .00 | 0 |
Table 3. Insider trading of Rti Surgical, Inc. (RTIX) by Stolper Mark
| Trade Date | Symbol | Trade Type | Shares | Price ($) | Value ($) |
|---|
| 2017-05-05 | RTIX | Buy | 5,000 | 4.57 | 22,850 |
Insider trading activities including stock purchases, stock sales, and option exercises
listed in the above table cannot be completely guaranteed as to their accuracy.
For more information regarding the trades made by Stolper Mark
(EVP, Chief Financial Officer of Radnet, Inc. at the time of this reporting) see
the Securities and Exchange Commission (SEC) website.