Jonathan P. Foster
CIK: 0001545414
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (28 total)
- Oct 15, 2026MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct30.5K shares at avg. $0.37$11K - Oct 15, 2026MBRX
Moleculin Biotech, Inc.
Award(A)DirectRestricted Stock Units
260K shares- - Oct 15, 2026MBRX
Moleculin Biotech, Inc.
Award(A)DirectStock Options (right to buy)
260K shares- - Oct 15, 2026MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct130K shares- - Aug 3, 2026MBRX
Moleculin Biotech, Inc.
Purchase(P)Direct293.3K shares- - Jun 22, 2026MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct41 shares at avg. $3.12$127.92 - Jun 22, 2026MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct174 shares- - Jun 20, 2026MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct31 shares at avg. $2.88$89.28 - Jun 20, 2026MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct109 shares- - Feb 18, 2026EMPD
Empery Digital Inc.
Other(J)DirectStock Option (Right to buy)
1 shares- - Feb 18, 2026EMPD
Empery Digital Inc.
Other(J)DirectStock Option (Right to buy)
1 shares- - Feb 18, 2026EMPD
Empery Digital Inc.
Other(J)DirectStock Option (Right to buy)
2 shares- - Nov 12, 2025MBRX
Moleculin Biotech, Inc.
Award(A)DirectPerformance Based Restricted Stock Units
400K shares- - Nov 12, 2025MBRX
Moleculin Biotech, Inc.
Award(A)DirectStock option (right to buy)
600K shares- - Nov 4, 2025MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct20.6K shares- - Nov 4, 2025MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct5K shares at avg. $0.50$2K - Jul 21, 2025VLCN
Volcon, Inc.
Award(A)Direct20K shares at avg. $10.00$200K - Jul 17, 2025VLCN
Volcon, Inc.
Award(A)DirectStock options (right to buy)
10K shares- - Jun 23, 2025MBRX
Moleculin Biotech, Inc.
Purchase(P)Direct270.3K shares at avg. $0.37$100K - Jun 22, 2025MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct4.3K shares- - Jun 22, 2025MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct1.1K shares at avg. $0.27$281.418 - Jun 20, 2025MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct661 shares at avg. $0.27$176.487 - Jun 20, 2025MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct2.7K shares- - Jun 16, 2025MBRX
Moleculin Biotech, Inc.
Tax Payment(F)Direct203 shares at avg. $0.69$139.096 - Jun 16, 2025MBRX
Moleculin Biotech, Inc.
Exercise(M)Direct833 shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Oct 15, 2026 |  MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 30,485 | $0.37 | $11,282 | Direct |
| Oct 15, 2026 | MBRX Moleculin Biotech, Inc. | Award(A) Restricted Stock Units | 260,000 | - | - | Direct |
| Oct 15, 2026 | MBRX Moleculin Biotech, Inc. | Award(A) Stock Options (right to buy) | 260,000 | - | - | Direct |
| Oct 15, 2026 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 130,000 | - | $0 | Direct |
| Aug 3, 2026 | MBRX Moleculin Biotech, Inc. | Purchase(P) | 293,333 | - | $0 | Direct |
| Jun 22, 2026 | MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 41 | $3.12 | $128 | Direct |
| Jun 22, 2026 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 174 | - | $0 | Direct |
| Jun 20, 2026 | MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 31 | $2.88 | $89 | Direct |
| Jun 20, 2026 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 109 | - | $0 | Direct |
| Feb 18, 2026 |  EMPD Empery Digital Inc. | Other(J) Stock Option (Right to buy) | 1 | - | - | Direct |
| Feb 18, 2026 | EMPD Empery Digital Inc. | Other(J) Stock Option (Right to buy) | 1 | - | - | Direct |
| Feb 18, 2026 | EMPD Empery Digital Inc. | Other(J) Stock Option (Right to buy) | 2 | - | - | Direct |
| Nov 12, 2025 | MBRX Moleculin Biotech, Inc. | Award(A) Performance Based Restricted Stock Units | 400,000 | - | - | Direct |
| Nov 12, 2025 | MBRX Moleculin Biotech, Inc. | Award(A) Stock option (right to buy) | 600,000 | - | - | Direct |
| Nov 4, 2025 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 20,625 | - | - | Direct |
| Nov 4, 2025 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 5,023 | $0.50 | $2,496 | Direct |
| Jul 21, 2025 |  VLCN Volcon, Inc. | Award(A) | 20,000 | $10.00 | $200,000 | Direct |
| Jul 17, 2025 | VLCN Volcon, Inc. | Award(A) Stock options (right to buy) | 10,000 | - | - | Direct |
| Jun 23, 2025 | MBRX Moleculin Biotech, Inc. | Purchase(P) | 270,270 | $0.37 | $100,000 | Direct |
| Jun 22, 2025 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 4,328 | - | - | Direct |
| Jun 22, 2025 | MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 1,054 | $0.27 | $281 | Direct |
| Jun 20, 2025 | MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 661 | $0.27 | $176 | Direct |
| Jun 20, 2025 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 2,711 | - | - | Direct |
| Jun 16, 2025 | MBRX Moleculin Biotech, Inc. | Tax Payment(F) | 203 | $0.69 | $139 | Direct |
| Jun 16, 2025 | MBRX Moleculin Biotech, Inc. | Exercise(M) | 833 | - | - | Direct |
1-25 of 28 transactions
About Foster Jonathan P.
Foster Jonathan P. (SEC CIK 0001545414) files insider reports with the SEC as Chief Financial Officer of Moleculin Biotech, Inc. (MBRX) and Director of Empery Digital Inc. (EMPD).
Signal8 holds 10 ownership filings by Foster Jonathan P., all Form 4s, filed between Nov 6, 2024 and Oct 16, 2026. Those filings report 28 transactions, from Oct 25, 2024 to Oct 15, 2026. Signal8's Form 4 history starts in Sep 2024.
The business address on Foster Jonathan P.'s filings is in HOUSTON, TX.
Recent filings by Foster Jonathan P.
- Oct 15, 2026: Tax withholding of MBRX shares (Form 4, code F).
- Oct 15, 2026: Grants or awards of MBRX derivative securities (2 lines, Form 4, code A).
- Oct 15, 2026: Option exercise of MBRX shares (Form 4, code M).
- Aug 3, 2026: Open-market purchase of MBRX shares (Form 4, code P).
- Jun 22, 2026: Tax withholding of MBRX shares (Form 4, code F).
Other insiders filing for Moleculin Biotech, Inc. (MBRX)
- PICKER DONALD H, Chief Science Officer
- KLEMP WALTER V, CEO and President
- Yan Joy, Director
- Cermak Elizabeth, Director
- CANNON MICHAEL D, Director
- Climaco John M, Director