Moleculin Biotech
MBRX · NASDAQ
$6.19+$5.93 (+2235.85%)TodayMarket closed ·
Prev close $0.265
Who owns MBRX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 39.7% of MBRX’s shares.
- Heights Capital Management, Inc.19.8%
- Klemp (Walter V.)8.0%
- Foster (Jonathan P.)4.3%
- Intracoastal Capital, L.L.C.2.9%
- Next 6 largest institutions4.8%
- All other shareholders60.3%
| Holder | Shares | % of shares |
|---|---|---|
| Heights Capital Management, Inc. | 1.40M | 19.80% |
| Klemp (Walter V.) | 564.34K | 7.98% |
| Foster (Jonathan P.) | 305.67K | 4.32% |
| Intracoastal Capital, L.L.C. | 203.72K | 2.88% |
| Picker (Donald H) | 174.09K | 2.46% |
| Geode Capital Management, L.L.C. | 47.25K | 0.67% |
| Vanguard Capital Management, LLC | 42.22K | 0.60% |
| Vanguard Fiduciary Trust Co | 29.88K | 0.42% |
| XTX Markets LLC | 22.94K | 0.32% |
| Morgan Stanley & Co. LLC | 20.02K | 0.28% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Extended Market Index Fund | 42.22K | 0.60% |
| Fidelity Extended Market Index Fund | 27.44K | 0.39% |
| Abante Quant Value, FI | 19.38K | 0.27% |
| Fidelity Series Total Market Index Fund | 7.99K | 0.11% |
| Fidelity NASDAQ Composite Index Fund | 4.48K | 0.06% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of MBRX in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| KLEMP WALTER V | Option exercise | 207.50K | — |
| KLEMP WALTER V | Award | 415.00K | — |
| KLEMP WALTER V | Award | 415.00K | — |
| KLEMP WALTER V | Tax withholding | 48.66K | $18.01K |
| KLEMP WALTER V | Option exercise | 207.50K | — |
| Foster Jonathan P. | Option exercise | 130.00K | — |
| Foster Jonathan P. | Award | 260.00K | — |
| Foster Jonathan P. | Award | 260.00K | — |
| Foster Jonathan P. | Tax withholding | 30.48K | $11.28K |
| Foster Jonathan P. | Option exercise | 130.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 204.58K
- Days to cover
- 1.00
- % of shares outstanding
- 2.89%
- Average daily volume
- 1.71M
- Change since last report
- −28.9%
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