MBRX Moleculin Biotech, Inc.

NASDAQ
$0.60

Moleculin Biotech, Inc. (MBRX) Insider Activity

What the officers, directors and large holders did with their own shares. Only open-market purchases and sales count toward the totals — grants, option exercises and shares withheld for tax are compensation mechanics, not decisions, and they're listed separately below.

30D 90D 6M 1Y
Insider signal Quiet No open-market insider activity in this window.
Cluster activity 0 buyers in the last 30 days 3 buyers in the last 90 days 0 sellers in the last 90 days
Insiders buying
3
3 transactions
Insiders selling
0
0 transactions
Purchases
$0
999,999 shares
Sales
$0
0 shares
Net activity
$0
purchases less sales

Where they traded

Buy Sell Dot area is proportional to transaction value.

Last open-market purchase: August 3, 2026 , by KLEMP WALTER V .

Recent open-market activity

Date Insider Role Action Shares Price Value Held after
KLEMP WALTER V CEO and President Buy 533,333 $0.00 $0 564,340
PICKER DONALD H Chief Science Officer Buy 173,333 $0.00 $0 174,086
Foster Jonathan P. Chief Financial Officer Buy 293,333 $0.00 $0 305,673

Form 4s are due within two business days of a transaction, so this is close to real time — unlike the quarterly 13F data on the Institutional tab. A single large sale often reflects a prearranged 10b5-1 plan rather than a fresh view, so read a pattern of sales rather than any one of them.