Moleculin Biotech MBRX Insider Ownership

NASDAQ MBRX
$6.17 -0.02 (-0.25%)
As of: Oct 21, 2026 · 11:27 AM EDT

Insider Holdings by Owner

1.04Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
14.71%
▲+14.08% pp QoQ
Shares Held by Insiders
1.04Mn
filed for Sep 2026
▲+2,265.57% QoQ
Shares Outstanding
7.10Mn
7,100,000 shares
Direct Holdings
1.04Mn
Indirect: 0
Net Shares Traded (QoQ)
+1,000.00K
net buying in Sep 2026
Insiders Holding Shares
4
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Updated

Over the trailing 12 months, MBRX insiders made open-market purchases with no usable reported price, and made no open-market sales.

Form 4 Holdings

Insiders Holding MBRX

Insiders 4
Shares held 1.04Mn
Of outstanding 14.71%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Walter V Klemp Ceo And President 564,340 0 564,340 54.0% 05 Aug, 2026
2 Jonathan P. Foster Chief Financial Officer 305,673 0 305,673 29.3% 05 Aug, 2026
3 Donald H Picker Chief Science Officer 174,086 0 174,086 16.7% 05 Aug, 2026
4 Robert E. George Director 39 0 39 0.0% 27 Dec, 2023

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

248 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
03 Aug, 2026 Walter V Klemp Ceo And President Acquired P 533,333 — — 564,340 Direct
03 Aug, 2026 Jonathan P. Foster Chief Financial Officer Acquired P 293,333 — — 305,673 Direct
03 Aug, 2026 Donald H Picker Chief Science Officer Acquired P 173,333 — — 174,086 Direct
03 Aug, 2026 Donald H Picker Chief Science Officer Acquired P 519,999 — — 539,595 Direct
03 Aug, 2026 Jonathan P. Foster Chief Financial Officer Acquired P 879,999 — — 1,027,717 Direct
03 Aug, 2026 Walter V Klemp Ceo And President Acquired A 1,599,999 — — 1,926,335 Direct
20 Jun, 2026 Jonathan P. Foster Chief Financial Officer Acquired M 109 — — 12,238 Direct
20 Jun, 2026 Donald H Picker Chief Science Officer Acquired M 44 — — 716 Direct
20 Jun, 2026 Walter V Klemp Ceo And President Acquired M 150 — — 30,765 Direct
20 Jun, 2026 Jonathan P. Foster Chief Financial Officer Disposed F 31 $2.88 $89 12,207 Direct
20 Jun, 2026 Walter V Klemp Ceo And President Disposed F 37 $2.88 $107 30,728 Direct
20 Jun, 2026 Donald H Picker Chief Science Officer Disposed F 13 $2.88 $37 703 Direct
22 Jun, 2026 Jonathan P. Foster Chief Financial Officer Acquired M 174 — — 12,381 Direct
22 Jun, 2026 Donald H Picker Chief Science Officer Acquired M 71 — — 774 Direct
22 Jun, 2026 Walter V Klemp Ceo And President Acquired M 360 — — 31,088 Direct
22 Jun, 2026 Walter V Klemp Ceo And President Disposed F 88 $3.12 $275 31,007 Direct
22 Jun, 2026 Jonathan P. Foster Chief Financial Officer Disposed F 41 $3.12 $128 12,340 Direct
22 Jun, 2026 Donald H Picker Chief Science Officer Disposed F 21 $3.12 $66 753 Direct
20 Jun, 2026 Jonathan P. Foster Chief Financial Officer Disposed M 109 $0.00 $0 147,892 Direct
20 Jun, 2026 Walter V Klemp Ceo And President Disposed M 150 $0.00 $0 326,696 Direct