Jonathan P. Foster
Insider
First SEC filing: Jan. 26, 2024 · Latest: Jan. 26, 2024
Insider at
Insider transactions
2 buys (P)
0 sells (S)
Net: $0
Price change vs the latest weekly close (updated to the current quote in your browser when available), split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Oct. 15, 2026 | MBRX | M | 130,000 | · | · | 435,673 Direct | +42.53% | Acquired | |
| Oct. 15, 2026 | MBRX | F | 30,485 | $0.37 | $11,279 | 405,188 Direct | -7.00% | Disposed | 1656.8% (price as of ) |
| Oct. 15, 2026 | MBRX | A | 260,000 | · | · | 1,287,717 Direct | +25.30% | Acquired | |
| Oct. 15, 2026 | MBRX | A | 260,000 | · | · | 1,547,717 Direct | +20.19% | Acquired | |
| Oct. 15, 2026 | MBRX | M | 130,000 | · | · | 1,417,717 Direct | -8.40% | Disposed | |
| Aug. 3, 2026 | MBRX | P | 293,333 | · | · | 305,673 Direct | +2377.09% | Acquired | |
| Aug. 3, 2026 | MBRX | P | 879,999 | · | · | 1,027,717 Direct | +595.73% | Acquired | |
| June 22, 2026 | MBRX | M | 174 | · | · | 12,381 Direct | +1.43% | Acquired | |
| June 22, 2026 | MBRX | F | 41 | $3.12 | $128 | 12,340 Direct | -0.33% | Disposed | 108.3% (price as of ) |
| June 22, 2026 | MBRX | M | 174 | · | · | 147,718 Direct | -0.12% | Disposed | |
| June 20, 2026 | MBRX | M | 109 | · | · | 12,238 Direct | +0.90% | Acquired | |
| June 20, 2026 | MBRX | F | 31 | $2.88 | $89 | 12,207 Direct | -0.25% | Disposed | 125.7% (price as of ) |
| June 20, 2026 | MBRX | M | 109 | · | · | 147,892 Direct | -0.07% | Disposed | |
| Feb. 18, 2026 | EMPD | J | 2 | · | · | 0 Direct | -100.00% | Disposed | |
| Feb. 18, 2026 | EMPD | J | 1 | · | · | 0 Direct | -100.00% | Disposed | |
| Feb. 18, 2026 | EMPD | J | 1 | · | · | 0 Direct | -100.00% | Disposed | |
| Nov. 12, 2025 | MBRX | A | 600,000 | · | · | 1,617,695 Direct | +58.96% | Acquired | |
| Nov. 12, 2025 | MBRX | A | 400,000 | · | · | 2,017,695 Direct | +24.73% | Acquired | |
| Nov. 4, 2025 | MBRX | M | 20,625 | · | · | 308,212 Direct | +7.17% | Acquired | |
| Nov. 4, 2025 | MBRX | M | 5,023 | $0.50 | $2,512 | 303,189 Direct | -1.63% | Disposed | -48.0% (price as of ) |
| Nov. 4, 2025 | MBRX | M | 20,625 | · | · | 1,017,695 Direct | -1.99% | Disposed | |
| July 21, 2025 | EMPD | A | 20,000 | $10.00 | $200,000 | 20,000 Direct | · | Acquired | -72.7% (price as of ) |
| July 17, 2025 | EMPD | A | 10,000 | · | · | 10,000 Direct | · | Acquired | |
| June 23, 2025 | MBRX | P | 270,270 | $0.37 | $100,000 | 287,587 Direct | +1560.72% | Acquired | -29.7% (price as of ) |
| June 23, 2025 | MBRX | P | 810,810 | · | · | 1,038,320 Direct | -43.85% | Disposed | |
| June 22, 2025 | MBRX | M | 4,328 | · | · | 18,371 Direct | +30.82% | Acquired | |
| June 22, 2025 | MBRX | F | 1,054 | $0.27 | $285 | 17,317 Direct | -5.74% | Disposed | -3.7% (price as of ) |
| June 22, 2025 | MBRX | M | 4,328 | · | · | 227,510 Direct | -1.87% | Disposed | |
| June 20, 2025 | MBRX | M | 2,711 | · | · | 14,704 Direct | +22.60% | Acquired | |
| June 20, 2025 | MBRX | F | 661 | $0.27 | $178 | 14,043 Direct | -4.50% | Disposed | -3.7% (price as of ) |
| June 20, 2025 | MBRX | M | 2,711 | · | · | 231,838 Direct | -1.16% | Disposed | |
| June 16, 2025 | MBRX | M | 833 | · | · | 12,196 Direct | +7.33% | Acquired | |
| June 16, 2025 | MBRX | F | 203 | $0.69 | $140 | 11,993 Direct | -1.66% | Disposed | -62.3% (price as of ) |
| June 16, 2025 | MBRX | M | 833 | · | · | 230,684 Direct | -0.36% | Disposed | |
| Nov. 4, 2024 | MBRX | A | 65,000 | · | · | 129,837 Direct | +100.25% | Acquired | |
| Nov. 4, 2024 | MBRX | A | 82,500 | · | · | 212,337 Direct | +63.54% | Acquired | |
| Oct. 25, 2024 | MBRX | A | 19,180 | · | · | 231,517 Direct | +9.03% | Acquired | |
| June 22, 2024 | MBRX | M | 4,329 | · | · | 12,416 Direct | +53.53% | Acquired | |
| June 22, 2024 | MBRX | F | 1,053 | $3.74 | $3,938 | 11,363 Direct | -8.48% | Disposed | -93.0% (price as of ) |
| June 22, 2024 | MBRX | M | 4,329 | · | · | 64,837 Direct | -6.26% | Disposed | |
| June 20, 2024 | MBRX | M | 2,712 | · | · | 8,723 Direct | +45.12% | Acquired | |
| June 20, 2024 | MBRX | F | 636 | $3.78 | $2,404 | 8,087 Direct | -7.29% | Disposed | -93.1% (price as of ) |
| June 20, 2024 | MBRX | M | 2,712 | · | · | 69,166 Direct | -3.77% | Disposed | |
| June 16, 2024 | MBRX | M | 834 | · | · | 6,207 Direct | +15.52% | Acquired | |
| June 16, 2024 | MBRX | F | 196 | $4.14 | $811 | 6,011 Direct | -3.16% | Disposed | -93.7% (price as of ) |
| June 16, 2024 | MBRX | M | 834 | · | · | 71,878 Direct | -1.15% | Disposed | |
| Dec. 26, 2023 | MBRX | P | 28,986 | $0.69 | $20,000 | 80,556 Direct | +56.21% | Acquired | -97.5% (price as of ) |
| July 12, 2023 | EMPD | A | 200,000 | · | · | 376,250 Direct | +113.48% | Acquired | |
| June 22, 2023 | MBRX | A | 150,000 | · | · | 830,938 Direct | +22.03% | Acquired | |
| June 22, 2023 | MBRX | A | 259,688 | · | · | 1,090,626 Direct | +31.25% | Acquired | |
| June 20, 2023 | MBRX | M | 40,667 | · | · | 61,246 Direct | +197.61% | Acquired | |
| June 20, 2023 | MBRX | F | 9,676 | $0.57 | $5,515 | 51,570 Direct | -15.80% | Disposed | -97.0% (price as of ) |
| June 20, 2023 | MBRX | M | 40,667 | · | · | 680,938 Direct | -5.64% | Disposed | |
| June 16, 2023 | MBRX | M | 12,500 | · | · | 23,623 Direct | +112.38% | Acquired | |
| June 16, 2023 | MBRX | F | 3,044 | $0.57 | $1,735 | 20,579 Direct | -12.89% | Disposed | -97.0% (price as of ) |
| June 16, 2023 | MBRX | M | 12,500 | · | · | 721,605 Direct | -1.70% | Disposed | |
| July 26, 2022 | EMPD | A | 101,250 | · | · | 176,250 Direct | +135.00% | Acquired | |
| July 26, 2022 | EMPD | A | 101,250 | · | · | 101,250 Direct | · | Acquired | |
| June 20, 2022 | MBRX | A | 155,000 | · | · | 571,438 Direct | +37.22% | Acquired | |
| June 20, 2022 | MBRX | A | 162,667 | · | · | 734,105 Direct | +28.47% | Acquired | |
| June 16, 2022 | MBRX | M | 12,500 | · | · | 14,167 Direct | +749.85% | Acquired | |
| June 16, 2022 | MBRX | F | 3,044 | $1.33 | $4,049 | 11,123 Direct | -21.49% | Disposed | -98.7% (price as of ) |
| June 16, 2022 | MBRX | M | 12,500 | · | · | 416,438 Direct | -2.91% | Disposed | |
| June 16, 2021 | MBRX | A | 108,770 | · | · | 378,938 Direct | +40.26% | Acquired | |
| June 16, 2021 | MBRX | A | 50,000 | · | · | 428,938 Direct | +13.19% | Acquired | |
| July 2, 2020 | MBRX | A | 460,000 | · | · | 1,621,000 Direct | +39.62% | Acquired | |
| July 11, 2019 | MBRX | A | 315,000 | · | · | 1,161,000 Direct | +37.23% | Acquired | |
| June 6, 2018 | MBRX | A | 301,000 | · | · | 846,000 Direct | +55.23% | Acquired | |
| Oct. 3, 2017 | MBRX | A | 145,000 | · | · | 545,000 Direct | +36.25% | Acquired | |
| April 25, 2017 | MBRX | P | 10,000 | $0.86 | $8,600 | 10,000 Direct | · | Acquired | -99.7% (price as of ) |
| Aug. 19, 2016 | MBRX | A | 400,000 | · | · | 400,000 Direct | · | Acquired |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II) Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Oct. 15, 2026 | MBRX | Stock Options (right to buy) | Common Stock | $0.37 | Oct. 15, 2036 | 260,000 | Acquired |
| Oct. 15, 2026 | MBRX | Restricted Stock Units | Common Stock | · | · | 260,000 | Acquired |
| Oct. 15, 2026 | MBRX | Restricted Stock Units | Common Stock | · | · | 130,000 | Disposed |
| Aug. 3, 2026 | MBRX | Series I Warrants | Common Stock | · | Aug. 3, 2031 | 879,999 | Acquired |
| June 22, 2026 | MBRX | Restricted Stock Units | Common Stock | · | · | 174 | Disposed |
| June 20, 2026 | MBRX | Restricted Stock Units | Common Stock | · | · | 109 | Disposed |
| Feb. 18, 2026 | EMPD | Stock Option (Right to buy) | Common Stock | $993600.00 | July 12, 2034 | 2 | Disposed |
| Feb. 18, 2026 | EMPD | Stock Option (Right to buy) | Common Stock | $2232000.00 | July 26, 2033 | 1 | Disposed |
| Feb. 18, 2026 | EMPD | Stock Option (Right to buy) | Common Stock | $1440000.00 | May 19, 2031 | 1 | Disposed |
| Nov. 12, 2025 | MBRX | Stock option (right to buy) | Common Stock | $0.49 | Nov. 12, 2035 | 600,000 | Acquired |
| Nov. 12, 2025 | MBRX | Performance Based Restricted Stock Units | Common Stock | · | Nov. 12, 2035 | 400,000 | Acquired |
| Nov. 4, 2025 | MBRX | Restricted Stock Units | Common Stock | · | · | 20,625 | Disposed |
| July 17, 2025 | EMPD | Stock options (right to buy) | Common Stock | $10.00 | July 17, 2035 | 10,000 | Acquired |
| June 23, 2025 | MBRX | Series E Warrants | Common Stock | $0.37 | · | 810,810 | Disposed |
| June 22, 2025 | MBRX | Restricted Stock Units | Common Stock | · | · | 4,328 | Disposed |
| June 20, 2025 | MBRX | Restricted Stock Units | Common Stock | · | · | 2,711 | Disposed |
| June 16, 2025 | MBRX | Restricted Stock Units | Common Stock | · | · | 833 | Disposed |
| Nov. 4, 2024 | MBRX | Stock option (right to buy) | Common Stock | $2.45 | Nov. 4, 2034 | 65,000 | Acquired |
| Nov. 4, 2024 | MBRX | Restricted Stock Units | Common Stock | · | · | 82,500 | Acquired |
| Oct. 25, 2024 | MBRX | Performance Based Restricted Stock Units | Common Stock | · | Dec. 29, 2033 | 19,180 | Acquired |
| June 22, 2024 | MBRX | Restricted Stock Units | Common Stock | · | · | 4,329 | Disposed |
| June 20, 2024 | MBRX | Restricted Stock Units | Common Stock | · | · | 2,712 | Disposed |
| June 16, 2024 | MBRX | Restricted Stock Units | Common Stock | · | · | 834 | Disposed |
| July 12, 2023 | EMPD | Stock Option | Common Stock | $0.69 | July 12, 2033 | 200,000 | Acquired |
| June 22, 2023 | MBRX | Stock option (right to buy) | Common Stock | $0.60 | June 22, 2033 | 150,000 | Acquired |
| June 22, 2023 | MBRX | Restricted Stock Units | Common Stock | · | · | 259,688 | Acquired |
| June 20, 2023 | MBRX | Restricted Stock Units | Common Stock | · | · | 40,667 | Disposed |
| June 16, 2023 | MBRX | Restricted Stock Units | Common Stock | · | · | 12,500 | Disposed |
| July 26, 2022 | EMPD | Stock Option | Common stock | $1.55 | July 26, 2032 | 101,250 | Acquired |
| July 26, 2022 | EMPD | Stock Option | Common stock | $1.55 | July 26, 2032 | 101,250 | Acquired |
| June 20, 2022 | MBRX | Stock option (right to buy) | Common stock | $1.49 | June 20, 2032 | 155,000 | Acquired |
| June 20, 2022 | MBRX | Restricted Stock Units | Common stock | · | · | 162,667 | Acquired |
| June 16, 2022 | MBRX | Restricted Stock Units | Common Stock | · | · | 12,500 | Disposed |
| June 16, 2021 | MBRX | Stock option (right to buy) | Common Stock | $3.73 | June 16, 2031 | 108,770 | Acquired |
| June 16, 2021 | MBRX | Restricted Stock Units | Common Stock | · | · | 50,000 | Acquired |
| July 2, 2020 | MBRX | Stock option (right to buy) | Common Stock | $0.93 | July 2, 2030 | 460,000 | Acquired |
| July 11, 2019 | MBRX | Stock option (right to buy) | Common Stock | $1.31 | July 11, 2029 | 315,000 | Acquired |
| June 6, 2018 | MBRX | Stock option (right to buy) | Common stock | $1.82 | June 6, 2028 | 301,000 | Acquired |
| Oct. 3, 2017 | MBRX | Stock option (right to buy) | Common stock | $2.49 | Oct. 3, 2027 | 145,000 | Acquired |
| Aug. 19, 2016 | MBRX | Option to purchase common stock | Common Stock | $5.85 | Aug. 19, 2026 | 400,000 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.