Moleculin Biotech, Inc. (MBRX) has 20 known insider and institutional holders on record. The largest holder is CREDIT SUISSE/ with 3,547,335 shares. Other notable holders include KLEMP WALTER V and Foster Jonathan P..
Over the last 12 months, insiders have made 21 transactions in MBRX stock — 10 buys (valued at $1.52M) and 0 sells (valued at RSU Award). Insider buying has outpaced selling during this period, which may signal confidence in the company's prospects.
MBRX Insider Ownership
Top Holder
CREDIT SUISSE/
3,547,335 shares
Buys (12 mo)
10
$1.52M value
Sells (12 mo)
0
$0.00 value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Credit Suisse/ |
10 Percent Owner |
3,547,335 |
2006-11-07 |
|
| 2 |
Klemp Walter V |
CEO and President |
3,210,731 |
2025-11-14 |
|
| 3 |
Foster Jonathan P. |
EVP & CFO |
1,617,695 |
2025-11-14 |
|
| 4 |
Picker Donald H |
CSO |
295,508 |
2025-11-14 |
|
| 5 |
Mpm Bioventures Ii Qp Lp |
10 Percent Owner |
244,881 |
2005-10-04 |
|
| 6 |
George Robert E. |
Director |
165,336 |
2025-11-14 |
|
| 7 |
Cannon Michael D |
Director |
165,336 |
2025-11-14 |
|
| 8 |
Climaco John M |
Director |
165,169 |
2025-11-14 |
|
| 9 |
Cermak Elizabeth |
Director |
164,668 |
2025-11-14 |
|
| 10 |
Yan Joy |
Director |
164,001 |
2025-11-14 |
|
| 11 |
Priebe Waldemar |
10 Percent Owner |
100,000 |
2020-08-24 |
|
| 12 |
Baracchini Edgardo Jr |
Sr. VP of Business Development |
100,000 |
2008-08-06 |
|
| 13 |
Burgess Daniel D |
Director |
10,000 |
2009-06-24 |
|
| 14 |
Stoner Elizabeth |
Director |
10,000 |
2009-06-25 |
|
| 15 |
Evnin Luke |
10 Percent Owner |
10,000 |
2009-06-25 |
|
| 16 |
Oronsky Arnold L |
Director |
10,000 |
2009-06-24 |
|
| 17 |
Interwest Partners Vii L P |
10 Percent Owner |
6,824 |
2005-10-04 |
|
| 18 |
Millican Trisha |
Principal Accounting Officer |
6,690 |
2008-09-30 |
|
| 19 |
Cash Harvey B |
10 Percent Owner |
4,464 |
2006-05-24 |
|
| 20 |
Northcut Jacqueline |
Director |
1,000 |
2017-05-05 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2025-11-12 |
Yan Joy |
Director |
RSU Award |
150,000 |
$0.49 |
$73.5K |
| 2025-11-12 |
George Robert E. |
Director |
RSU Award |
150,000 |
$0.49 |
$73.5K |
| 2025-11-12 |
Climaco John M |
Director |
RSU Award |
150,000 |
$0.49 |
$73.5K |
| 2025-11-12 |
Foster Jonathan P. |
EVP & CFO |
RSU Award |
600,000 |
$0.49 |
$294K |
| 2025-11-12 |
Cermak Elizabeth |
Director |
RSU Award |
150,000 |
$0.49 |
$73.5K |
| 2025-11-12 |
Picker Donald H |
CSO |
RSU Award |
200,000 |
$0.49 |
$98K |
| 2025-11-12 |
Cannon Michael D |
Director |
RSU Award |
150,000 |
$0.49 |
$73.5K |
| 2025-11-12 |
Klemp Walter V |
CEO and President |
RSU Award |
830,000 |
$0.49 |
$406.7K |
| 2025-11-04 |
Foster Jonathan P. |
Chief Financial Officer |
Option Exercise (Sell) |
5,023 |
$0.50 |
$2.5K |
| 2025-11-04 |
Picker Donald H |
Chief Science Officer |
Tax Withholding of RSU |
2,131 |
$0.50 |
$1.06K |
| 2025-11-04 |
Klemp Walter V |
CEO and President |
Tax Withholding of RSU |
7,001 |
$0.50 |
$3.48K |
| 2025-06-23 |
Foster Jonathan P. |
Chief Financial Officer |
Informative Buy |
270,270 |
$0.37 |
$100K |
| 2025-06-22 |
Foster Jonathan P. |
Chief Financial Officer |
Tax Withholding of RSU |
1,054 |
$0.27 |
$281.42 |
| 2025-06-20 |
Foster Jonathan P. |
Chief Financial Officer |
Tax Withholding of RSU |
661 |
$0.27 |
$176.49 |
| 2025-06-22 |
Picker Donald H |
Chief Science Officer |
Tax Withholding of RSU |
430 |
$0.27 |
$114.81 |
| 2025-06-20 |
Picker Donald H |
Chief Science Officer |
Tax Withholding of RSU |
263 |
$0.27 |
$70.22 |
| 2025-06-23 |
Klemp Walter V |
CEO and President |
Informative Buy |
675,675 |
$0.37 |
$250K |
| 2025-06-22 |
Klemp Walter V |
CEO and President |
Tax Withholding of RSU |
2,190 |
$0.27 |
$584.73 |
| 2025-06-20 |
Klemp Walter V |
CEO and President |
Tax Withholding of RSU |
914 |
$0.27 |
$244.04 |
| 2025-06-16 |
Foster Jonathan P. |
Chief Financial Officer |
Tax Withholding of RSU |
203 |
$0.69 |
$139.10 |
| 2025-06-16 |
Klemp Walter V |
CEO and President |
Tax Withholding of RSU |
406 |
$0.69 |
$278.19 |
