Joy Yan
CIK 1866109 · View on SEC EDGAR ↗
Insider
First SEC filing: Nov. 14, 2025 · Latest: Nov. 14, 2025
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 6 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
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Nov. 12, 2025 | MBRX | A | 150,000 | — | — | 164,001 Direct | +1071.35% | Acquired | (price as of 2026-08-25) |
| Nov. 4, 2024 | MBRX | A | 10,000 | — | — | 14,001 Direct | +249.94% | Acquired | (price as of 2026-08-25) |
| May 25, 2023 | MBRX | A | 15,000 | — | — | 60,000 Direct | +33.33% | Acquired | (price as of 2026-08-25) |
| June 20, 2022 | MBRX | A | 23,333 | — | — | 30,000 Direct | +349.98% | Acquired | (price as of 2026-08-25) |
| June 20, 2022 | MBRX | A | 15,000 | — | — | 45,000 Direct | +50.00% | Acquired | (price as of 2026-08-25) |
| March 1, 2022 | MBRX | A | 6,667 | — | — | 6,667 Direct | — | Acquired | (price as of 2026-08-25) |
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 |
|---|---|---|---|---|---|---|---|
| Nov. 12, 2025 | MBRX | Stock Options (right to buy) | Common Stock (150,000) | $0.49 | Nov. 12, 2035 | 150,000 | Acquired |
| Nov. 4, 2024 | MBRX | Stock option (right to buy) | Common Stock (10,000) | $2.45 | Nov. 4, 2034 | 10,000 | Acquired |
| May 25, 2023 | MBRX | Stock option (right to buy) | Common Stock (15,000) | $0.62 | May 25, 2033 | 15,000 | Acquired |
| June 20, 2022 | MBRX | Stock option (right to buy) | Common Stock (23,333) | $1.49 | June 20, 2032 | 23,333 | Acquired |
| June 20, 2022 | MBRX | Stock option (right to buy) | Common Stock (15,000) | $1.49 | June 20, 2032 | 15,000 | Acquired |
| March 1, 2022 | MBRX | Stock Option (right to buy) | Common Stock (6,667) | $1.38 | March 1, 2032 | 6,667 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).