Delisting risk
MBRX · NASDAQ · Biotechnology

Moleculin Biotech (MBRX)

Developing Annamycin with cytarabine for relapsed or refractory acute myeloid leukemia.

$0.6913
Pre-market−0.01 (−0.86%)
At close$0.6973(+7.28%)

Breakdown13F · 13D/G · Form 4

Institutions20 holders · as of Mar 31, 20260.78%152.1K shares
Insiders3 holders · as of Aug 25, 202618.14%3.53M shares
Strategic holders1 holder · as of Aug 10, 20269.57%1.86M shares
Otherremainder71.51%13.93M shares

19.48M company shares as of Sep 3, 2026 · institutions as of Mar 31, 2026 · holders as of their latest filing

Two share counts disagree (19.48M in the company's Sep 3, 2026 report, 5.34M elsewhere); stakes use the report.

Top shareholders13F · 13D/G · Form 4

HolderStakeSharesEvidence
Walter V. Klemp1Insiderdirector, officer: CEO and President
10.63%2.07M13Dfiled Aug 25, 2026
CVI Investments, Inc.Strategic
9.57%1.86M13Gfiled Aug 10, 2026
Jonathan P. Foster2Insiderofficer: Chief Financial Officer
6.61%1.29M13Dfiled Aug 25, 2026
Donald H. PickerInsiderofficer: Chief Science Officer
0.89%174,086Form 4filed Aug 5, 2026
Sabby Management, LLCInstitution
0.39%75,02113Fas of Mar 31, 2026
Geode Capital Management, LLCInstitution
0.17%32,32913Fas of Mar 31, 2026
Vanguard Capital Management LLCInstitution
0.07%13,86913Fas of Mar 31, 2026
HRT Financial LPInstitution
0.07%13,73913Fas of Mar 31, 2026
Vanguard Fiduciary Trust CoInstitution
0.03%6,07213Fas of Mar 31, 2026
Rockefeller Capital Management L.P.Institution
0.02%4,42113Fas of Mar 31, 2026
UBS Group AGInstitution
0.02%3,40913Fas of Mar 31, 2026
Tower Research Capital LLC (TRC)Institution
0.01%1,83513Fas of Mar 31, 2026
BlackRock, Inc.Institution
0.00%49113Fas of Mar 31, 2026
Efg International AGInstitution
0.00%43413Fas of Mar 31, 2026
Pinnacle Wealth Planning Services, Inc.Institution
0.00%28113Fas of Mar 31, 2026
Newbridge Financial Services Group, Inc.Institution
0.00%11413Fas of Mar 31, 2026
Sbi Securities Co., Ltd.Institution
0.00%4313Fas of Mar 31, 2026
Morgan StanleyInstitution
0.00%3613Fas of Mar 31, 2026
Vanguard Global Advisers, LLCInstitution
0.00%2413Fas of Mar 31, 2026
FMR LLCInstitution
0.00%313Fas of Mar 31, 2026
Caitong International Asset Management Co., LtdInstitution
0.00%213Fas of Mar 31, 2026
Danske Bank A/SInstitution
0.00%213Fas of Mar 31, 2026
Advisor Group Holdings, Inc.Institution
0.00%113Fas of Mar 31, 2026
Cva Family Office, LLCInstitution
0.00%113Fas of Mar 31, 2026
Armistice Capital, LLCStrategic
9.99% of class, as filed13D/Gfiled Feb 14, 2024
  1. Walter V. Klemp's transaction reports restate only vehicles that traded; the 2026 ownership statement (2.07M) is used instead.
  2. Jonathan P. Foster's transaction reports restate only vehicles that traded; the 2026 ownership statement (1.29M) is used instead.

13F — a manager's quarterly holdings · 13D/13G — an ownership statement filed at 5% or more · Form 4 — an insider's transaction report

Institutions13F, as of Mar 31, 2026

20 holders · 152.1K shares · 7 new positions · 11 increased · 2 reduced · 4 closed

HolderShares% outstandingChg q/qFiled
Sabby Management, LLC75.0K0.39%+75.0KnewMay 15, 2026
Geode Capital Management, LLC32.3K0.17%+17.2KMay 15, 2026
Vanguard Capital Management LLC13.9K0.07%+13.9KnewMay 15, 2026
HRT Financial LP13.7K0.07%+13.7KnewMay 14, 2026
Vanguard Fiduciary Trust Co6.1K0.03%+6.1KnewMay 8, 2026
Rockefeller Capital Management L.P.4.4K0.02%+4.2KMay 14, 2026
UBS Group AG3.4K0.02%−2.5KMay 5, 2026
Tower Research Capital LLC (TRC)1.8K0.01%+442May 15, 2026

Ownership statements13D/G · 5% or more, as filed

Holder% of classSharesFormFiled
Klemp Walter Vincl. AnnaMed, Inc.9.90%2.07M13DAug 25, 2026
CVI Investments, Inc.9.90%1.86M13GAug 10, 2026
Foster Jonathan P.6.30%1.29M13DAug 25, 2026

Insider tradesForm 4

Latest trades

DateInsiderTypeSharesAvg priceOwned after
Aug 3, 2026
Donald H. Pickerofficer: Chief Science Officer
Purchase · 2 lots693,332$0.7500713,681
Aug 3, 2026
Walter V. Klempdirector, officer: CEO and President
Purchase533,333$0.7500564,340
Aug 3, 2026
Jonathan P. Fosterofficer: Chief Financial Officer
Purchase · 2 lots1,173,332$0.75001,333,390

CongressHouse and Senate disclosures

Not reported.