Insider · CIK 0001723729
Richard Bartram
Files at MBX (MBX Biosciences, Inc.). First filing -, latest -.
In brief
Richard Bartram files SEC Form 4 as CFO at MBX (MBX Biosciences, Inc.). No open-market trade is on file; the transactions below are grants, exercises and other rows that carry no view on the price.
A track record needs three past buys with six months of prices behind them; Richard Bartram has 0, so none is measured yet.
Signals
This insider’s open-market buys and sells, scored.
Planned sales
Form 144 notices this insider filed before selling restricted or control stock, newest first.
| Filed | Company | Shares | Value | Sale date | Past 3 months |
|---|---|---|---|---|---|
| Jun 10, 2026 | MBX MBX Biosciences, Inc. | 9,167 0.02% of outstanding | $280k | Jun 10, 2026 | $3.4M |
| Jun 9, 2026 | MBX MBX Biosciences, Inc. | 10,833 0.02% of outstanding | $321k | Jun 9, 2026 | $3.1M |
| May 13, 2026 | MBX MBX Biosciences, Inc. | 15,000 0.03% of outstanding | $554k | May 13, 2026 | $2.5M |
| May 11, 2026 | MBX MBX Biosciences, Inc. | 22,500 0.05% of outstanding | $992k | May 11, 2026 | $1.5M |
| May 8, 2026 | MBX MBX Biosciences, Inc. | 10,000 0.02% of outstanding | $380k | May 8, 2026 | $1.2M |
| May 7, 2026 | MBX MBX Biosciences, Inc. | 10,000 0.02% of outstanding | $322k | May 7, 2026 | $831k |
| May 1, 2026 | MBX MBX Biosciences, Inc. | 5,000 0.01% of outstanding | $159k | May 1, 2026 | $672k |
| Apr 22, 2026 | MBX MBX Biosciences, Inc. | 10,423 0.02% of outstanding | $341k | Apr 22, 2026 | $331k |
| Mar 25, 2026 | MBX MBX Biosciences, Inc. | 1,061 0.00% of outstanding | $30k | Mar 25, 2026 | $300k |
| Mar 16, 2026 | MBX MBX Biosciences, Inc. | 10,000 0.02% of outstanding | $300k | Mar 16, 2026 | none |
Transactions
Every row this insider has filed, 3 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Feb 2, 2026 | MBX MBX Biosciences, Inc. | AGrant or award Common Stock | +15,000 | $0.00 | $0 | 15,000 | Feb 3, 2026 |
| Feb 2, 2026 | MBX MBX Biosciences, Inc. | AGrant or award Stock option (right to buy)derivative | +70,000 | $0.00 | $0 | 70,000 | Feb 3, 2026 |
| Feb 3, 2025 | MBX MBX Biosciences, Inc. | AGrant or award Stock Option (Right to Buy)derivative | +95,000 | $0.00 | $0 | 95,000 | Feb 5, 2025 |
Questions about Richard Bartram
Answered from the filings on this page, as of the latest one.
Is Richard Bartram buying or selling?
Richard Bartram has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did Richard Bartram's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Richard Bartram has 0.
Where does Richard Bartram file Form 4?
Richard Bartram has filed Form 4 at MBX (MBX Biosciences, Inc.) as Chief Financial Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.