MBX Biosciences, Inc. - MBX
Ownership (Schedule 13D / 13G) · latest 50 filings
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| Filed | Form | Reporting person | Percent | Shares | SEC |
|---|---|---|---|---|---|
| Feb 11, 2026 | SCHEDULE 13D/A | — | 1.0% | — | View |
| Feb 10, 2026 | SCHEDULE 13G/A | Wellington Management Group LLP | 7.5% | 3,349,961 | View |
| Feb 10, 2026 | SCHEDULE 13G/A | Wellington Group Holdings LLP | 7.5% | 3,349,961 | View |
| Feb 10, 2026 | SCHEDULE 13G/A | Wellington Investment Advisors Holdings LLP | 7.5% | 3,349,961 | View |
| Feb 10, 2026 | SCHEDULE 13G/A | Wellington Management Company LLP | 7.3% | 3,349,961 | View |
| Jan 21, 2026 | SCHEDULE 13G | BlackRock, Inc. | 5.1% | 2,271,161 | View |
| Nov 14, 2025 | SCHEDULE 13G/A | P. Kent Hawryluk | 4.3% | 1,995,759 | View |
| Nov 12, 2025 | SCHEDULE 13G/A | Wellington Biomedical Innovation Master Investors (Cayman) II, L.P. | 4.5% | 2,017,394 | View |
| Nov 10, 2025 | SCHEDULE 13D/A | — | 1.0% | — | View |
Percent = "% of class represented by amount beneficially owned" for this reporting person in the filed 13D/13G.
Shares = reported beneficial ownership amount for the same row (not portfolio shares from 13F).
Amendments (/A) can repeat the same holder over time, so rows should not be summed.
Extraction is best-effort from filing text and can be missing or noisy; verify exact figures via the SEC link in each row.