MBRX Institutional Ownership
Who owns Moleculin Biotech, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 18 funds reported holding MBRX at Jun 30, 2026, together owning 0.9% of the company.
- ▲12 buying vs 7 selling
- ●Held by funds +0.2 pts
- ▼Funds holding -2
- ●No superinvestor moves
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 18 | 20 | −10.0% |
| In funds' top 10 | 0 | 1 | −100.0% |
| 13F shares | 186K | 152K | +22.1% |
| Held by funds | 0.9% | 0.8% | +0.2 pts |
| New positions | 5 | 4 | +25.0% |
| Increased | 7 | 4 | +75.0% |
| Reduced | 0 | 2 | −100.0% |
| Sold out | 7 | 3 | +133.3% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outWho owns MBRX
share of fund held shares- Index and passive funds64.5%
- Active managers and hedge funds22.6%
- Banks and brokers12.9%
- Pensions, insurers and other0.0%
The top 10 holders own 99.4% of all MBRX shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
3 funds changed their position- SBI Securities Co., Ltd.Sold out−44 sh
- SBI Securities Co., Ltd.New+33 sh
- Caitong International Asset Management Co., LtdNew+1 sh
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | Geode Capital Management, LLC | 0.24% | 47K | $132K | +15K |
| 2 | Vanguard Capital Management LLC | 0.22% | 42K | $118K | +28K |
| 3 | Vanguard Fiduciary Trust Co | 0.15% | 30K | $83K | +24K |
| 4 | XTX Topco Ltd | 0.12% | 23K | $64K | +23K |
| 5 | Morgan Stanley | 0.10% | 20K | $56K | +20K |
| 6 | Rockefeller Capital Management L.P. | 0.08% | 15K | $42K | +11K |
| 7 | Tower Research Capital LLC (TRC) | 0.02% | 3,514 | $10K | +1,679 |
| 8 | Citigroup Inc | 0.01% | 2,674 | $7K | +2,674 |
| 9 | Barclays PLC | 0.00% | 621 | $2K | +621 |
| 10 | BlackRock, Inc. | 0.00% | 491 | $1K | 0 |
- Vanguard Capital Management LLC+28K sh+$79K
- Vanguard Fiduciary Trust Co+24K sh+$66K
- XTX Topco Ltd+23K sh+$64K
- Morgan Stanley+20K sh+$56K
- Geode Capital Management, LLC+15K sh+$42K
- Rockefeller Capital Management L.P.+11K sh+$30K
- Citigroup Inc+2,674 sh+$7K
- Tower Research Capital LLC (TRC)+1,679 sh+$5K
- Sabby Management, LLC−75K sh−$172K
- Hrt Financial LP−14K sh−$31K
- UBS Group AG−3,409 sh−$8K
- Pinnacle Wealth Planning Services, Inc.−281 sh−$643
- Vanguard Global Advisers, LLC−24 sh−$55
- Fmr LLC−3 sh−$7
- Caitong International Asset Management Co., Ltd−2 sh−$5
MBRX institutional ownership FAQ
Who owns the most MBRX stock?
In Q2 2026 13F filings the largest holder of MBRX was Geode Capital Management, LLC, followed by Vanguard Capital Management LLC and Vanguard Fiduciary Trust Co. Index fund managers are usually the biggest holders of large companies.
What percentage of MBRX is owned by institutions?
Funds that file 13F reports held 0.9% of MBRX's shares at Jun 30, 2026, compared with 0.8% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying MBRX?
In Q2 2026, 12 funds bought MBRX (5 of them new positions) and 7 sold (7 sold out completely). Our fund sentiment for MBRX is neutral.
What is MBRX's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this MBRX ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.