Jonathan P. Foster
CIK 1545414 · View on SEC EDGAR ↗
Insider
First SEC filing: Jan. 26, 2024 · Latest: Jan. 26, 2024
On this page
Insider at
Insider transactions
2 buys (P)
0 sells (S)
Net:
$0
+ 9 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
9 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 3, 2026 | MBRX | P | 293,333 | — | — | 305,673 Direct | +2377.09% | Acquired | (price as of 2026-08-21) |
| Aug. 3, 2026 | MBRX | P | 879,999 | — | — | 1,027,717 Direct | +595.73% | Acquired | (price as of 2026-08-21) |
| April 25, 2017 | MBRX | P | 10,000 | $0.86 | $8,600 | 10,000 Direct | — | Acquired | -100.0% (price as of 2026-08-21) |
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 |
|---|---|---|---|---|---|---|---|
| Aug. 3, 2026 | MBRX | Series I Warrants | Common Stock (879,999) | — | Aug. 3, 2031 | 879,999 | Acquired |
| June 22, 2026 | MBRX | Restricted Stock Units | Common Stock (174) | — | — | 174 | Disposed |
| June 20, 2026 | MBRX | Restricted Stock Units | Common Stock (109) | — | — | 109 | Disposed |
| June 6, 2018 | MBRX | Stock option (right to buy) | Common stock (301,000) | $1.82 | June 6, 2028 | 301,000 | Acquired |
| Oct. 3, 2017 | MBRX | Stock option (right to buy) | Common stock (145,000) | $2.49 | Oct. 3, 2027 | 145,000 | Acquired |
| Aug. 19, 2016 | MBRX | Option to purchase common stock | Common Stock (400,000) | $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.