Moleculin Biotech, Inc.
MBRX- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001659617
In the last 90 days, Moleculin Biotech, Inc. insiders filed 3 open-market purchases and 0 sales; 18 institutions reported holding it in 13F filings for Q2 2026, worth $518.5K in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Moleculin Biotech, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 20
- +4 vs. Q4 2025
- Shares held
- 152.1K
- +72.5K (+90.9%) vs. Q4 2025
- Total value
- $347.9K
- +$84.2K (+31.9%) vs. Q4 2025
- New holders
- 7
- 4 more added
- Sold out
- 3
- 2 more reduced
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MBRX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 18 | $518.5K |
| Q1 2026 | 20 | $347.9K |
| Q4 2025 | 17 | $315.2K |
| Q3 2025 | 25 | $412.7K |
| Q2 2025 | 22 | $117.9K |
| Q1 2025 | 23 | $1.44M |
| Q4 2024 | 21 | $790.0K |
| Q3 2024 | 19 | $1.31M |
| Q2 2024 | 16 | $1.10M |
| Q1 2024 | 19 | $1.53M |
| Q4 2023 | 24 | $4.44M |
| Q3 2023 | 22 | $925.1K |
| Q2 2023 | 22 | $1.33M |
| Q1 2023 | 23 | $2.91M |
| Q4 2022 | 25 | $3.17M |
| Q3 2022 | 27 | $3.16M |
| Q2 2022 | 26 | $4.32M |
| Q1 2022 | 23 | $5.26M |
| Q4 2021 | 26 | $5.61M |
| Q3 2021 | 24 | $8.57M |
| Q2 2021 | 32 | $10.9M |
| Q1 2021 | 29 | $8.74M |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Moleculin Biotech, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Sabby Management, LLC | 75,021 | $171.8K | 3.01% | +75,021 | New |
| Geode Capital Management, LLC | 32,329 | $74.0K | 0.00% | +17,191+113.6% | Added |
| Vanguard Capital Management LLC | 13,869 | $31.8K | 0.00% | +13,869 | New |
| HRT Financial LP | 13,739 | $31.0K | 0.00% | +13,739 | New |
| Vanguard Fiduciary Trust Co | 6,072 | $13.9K | 0.00% | +6,072 | New |
| Rockefeller Capital Management L.P. | 4,421 | $10.1K | 0.00% | +4,203+1,928.0% | Added |
| UBS Group AG | 3,409 | $7.81K | 0.00% | −2,454−41.9% | Reduced |
| Tower Research Capital LLC (TRC) | 1,835 | $4.20K | 0.00% | +442+31.7% | Added |
| BlackRock, Inc. | 491 | $1.12K | 0.00% | −4−0.8% | Reduced |
| EFG International AG | 434 | $994 | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Planning Services, Inc. | 281 | $643 | 0.00% | 00.0% | Unchanged |
| Newbridge Financial Services Group, Inc. | 114 | $261 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 43 | $98 | 0.00% | +14+48.3% | Added |
| Morgan Stanley | 36 | $83 | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 24 | $55 | 0.00% | +24 | New |
| FMR LLC | 3 | $7 | 0.00% | +3 | New |
| Danske Bank A/S | 2 | $5 | 0.00% | 00.0% | Unchanged |
| Caitong International Asset Management Co., Ltd | 2 | $5 | 0.00% | +2 | New |
| Advisor Group Holdings, Inc. | 1 | $2 | 0.00% | 00.0% | Unchanged |
| CVA Family Office, LLC | 1 | $2 | 0.00% | 00.0% | Unchanged |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −33,085−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −22,550−100.0% | Sold out |
| Bank of America Corp | 0 | $0 | 0.00% | −36−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |