Cytosorbents Corporation (CTSO) has 20 known insider and institutional holders on record. The largest holder is Lamadrid David with 7,837,500 shares. Other notable holders include Chan Phillip P. and BERGER RONALD.
Over the last 12 months, insiders have made 9 transactions in CTSO stock — 9 buys (valued at $606.5K) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
CTSO Insider Ownership
Top Holder
Lamadrid David
7,837,500 shares
Buys (12 mo)
9
$606.5K value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Lamadrid David |
Chief Financial Officer |
7,837,500 |
2011-09-09 |
|
| 2 |
Chan Phillip P. |
Chief Executive Officer |
1,482,963 |
2025-11-20 |
|
| 3 |
Berger Ronald |
Interim CFO |
873,000 |
2013-07-17 |
|
| 4 |
Chassman Margie |
10 Percent Owner |
400,000 |
2006-11-17 |
|
| 5 |
Winchester James F |
Chief Medical Officer |
356,250 |
2008-06-27 |
|
| 6 |
Shipley Robert |
10 Percent Owner |
199,760 |
2015-01-23 |
|
| 7 |
Rubin Joseph |
Director |
150,000 |
2014-07-24 |
|
| 8 |
Capponi Vincent |
President and COO |
111,100 |
2025-08-08 |
|
| 9 |
Deliargyris Efthymios |
Chief Medical Officer |
95,000 |
2025-08-08 |
|
| 10 |
Mariani Peter J |
Chief Financial Officer |
90,000 |
2025-08-08 |
|
| 11 |
Bloch Kathleen P. |
Chief Financial Officer |
87,000 |
2024-04-04 |
|
| 12 |
Katz Kurt |
Director |
45,000 |
2008-06-27 |
|
| 13 |
Bator Michael G. |
Director |
44,000 |
2025-08-08 |
|
| 14 |
Kraus Al |
Director |
37,950 |
2022-08-12 |
|
| 15 |
Mortensen Eric R. |
Chief Medical Officer |
35,000 |
2019-08-16 |
|
| 16 |
Miller William R |
Director |
25,000 |
2008-06-27 |
|
| 17 |
Sobel Alan D. |
Director |
22,000 |
2025-08-08 |
|
| 18 |
Jones Edward Raymond |
Director |
22,000 |
2025-08-08 |
|
| 19 |
Kim Jiny |
Director |
22,000 |
2025-08-08 |
|
| 20 |
Bartlett Robert Hawes |
Chief Medical Officer |
20,000 |
2017-02-28 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-11-18 |
Chan Phillip P. |
Chief Executive Officer |
RSU Award |
100,000 |
$0.64 |
$64K |
| 2025-08-08 |
Kim Jiny |
Director |
RSU Award |
22,000 |
$1.00 |
$22K |
| 2025-08-08 |
Deliargyris Efthymios |
Chief Medical Officer |
RSU Award |
95,000 |
$1.00 |
$95K |
| 2025-08-08 |
Bator Michael G. |
Director |
RSU Award |
44,000 |
$1.00 |
$44K |
| 2025-08-08 |
Sobel Alan D. |
Director |
RSU Award |
22,000 |
$1.00 |
$22K |
| 2025-08-08 |
Chan Phillip P. |
Chief Executive Officer |
RSU Award |
136,400 |
$1.00 |
$136.4K |
| 2025-08-08 |
Jones Edward Raymond |
Director |
RSU Award |
22,000 |
$1.00 |
$22K |
| 2025-08-08 |
Capponi Vincent |
President and COO |
RSU Award |
111,100 |
$1.00 |
$111.1K |
| 2025-08-08 |
Mariani Peter J |
Chief Financial Officer |
RSU Award |
90,000 |
$1.00 |
$90K |
