Moleculin Biotech, Inc. (MBRX)
Nasdaq: MBRX · Pharmaceutical Preparations · Houston, TX · filing with the SEC since 2015
Who owns Moleculin Biotech, Inc.
As filed with the SECHolders of 5% or more
3
Klemp Walter V holds 9.9% of Common Stock, par value $0.001 per share, as its SCHEDULE 13D filed Aug 25, 2026 says.
Directors and officers
8
report now, of 10 people on the record since 2016. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Klemp Walter V
SCHEDULE 13D · filed Aug 25, 2026 · Common Stock, par value $0.001 per share
CVI Investments, Inc.
SCHEDULE 13G · filed Aug 10, 2026 · Common Stock, $0.001 par value per share
Foster Jonathan P.
SCHEDULE 13D · filed Aug 25, 2026 · Common Stock, par value $0.001 per share
Mitchell P. Kopin
SCHEDULE 13G · filed Aug 6, 2026 · Common stock, par value $0.001 per share · reported falling below 5%
Armistice Capital, LLC
SCHEDULE 13G/A · filed Aug 14, 2025 · Common Stock, par value $.001 per share · reported falling below 5%, from 8.93% in May 15, 2025
What MBRX reports owning in othersstakes of 5% or more, and other ties
Moleculin Biotech, Inc. reports no stake in another company in the record.
Insider tradesForm 4
0sales
3purchases
0sales on a scheduled plan
0people selling
$0sold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 6, 2025 to Nov 6, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 6, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window3 of 11 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Klemp Walter V | CEO and President | 0 | $0 | 0 | 1 | $0 |
| Foster Jonathan P. | Chief Financial Officer | 0 | $0 | 0 | 1 | $0 |
| Picker Donald H | Chief Science Officer | 0 | $0 | 0 | 1 | $0 |