LeonaBio, Inc.SEC Filings
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All SEC filings by LeonaBio, Inc. (LONA) — annual and quarterly reports, current reports, registrations, proxies and ownership forms, updated in real time.
Financials
| 10-Q | Quarterly report | View Diff | Aug 14, 2026 | |
| ARS | Annual report to shareholders | May 11, 2026 | ||
| 10-Q | Quarterly report | View Diff | May 7, 2026 | |
| 10-K | Annual report | View Diff | Mar 31, 2026 | |
| 10-Q | Quarterly report | View Diff | Nov 6, 2025 | |
| 10-Q | Quarterly report | View Diff | Aug 7, 2025 | |
| 10-Q | Quarterly report | View Diff | May 9, 2025 | |
| ARS | Annual report to shareholders | Apr 14, 2025 | ||
| 10-K | Annual report | View Diff | Feb 27, 2025 | |
| 10-Q | Quarterly report | View Diff | Nov 7, 2024 |
Events
| 8-K | Current report | Sep 22, 2026 | ||
| 8-K | Current report | Aug 26, 2026 | ||
| 8-K | Leonabio Reports Second Quarter 2026 Financial Results and Provides Business Update | Aug 14, 2026 | ||
| 8-K | Current report | Jun 23, 2026 | ||
| 8-K | Leonabio Reports First Quarter 2026 Financial Results and Provides Business Update | May 7, 2026 | ||
| 8-K/A | Completion of Acquisition or Disposition of Assets | Mar 31, 2026 | ||
| 8-K | Leonabio Reports Full Year 2025 Financial Results and Provides Business Update | Mar 26, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Mar 19, 2026 | ||
| 8-K | Departure of Directors or Certain Officers | Jan 9, 2026 | ||
| 8-K/A | Entry Into a Material Definitive Agreement | Dec 18, 2025 |
Registrations and Prospectuses
| 424B3 | Prospectus supplement | Apr 1, 2026 | ||
| 424B3 | Prospectus supplement | Apr 1, 2026 | ||
| S-8 | Registration of securities for employees | Apr 1, 2026 | ||
| S-8 | Registration of securities for employees | Apr 1, 2026 | ||
| S-1/A | IPO registration | View Diff | Mar 31, 2026 | |
| S-1/A | IPO registration | Mar 31, 2026 | ||
| S-3 | Shelf registration | View Diff | Jan 20, 2026 | |
| S-3 | Shelf registration | View Diff | Jan 20, 2026 | |
| S-8 | Registration of securities for employees | Feb 27, 2025 | ||
| S-3 | Shelf registration | View Diff | Oct 21, 2024 |
Proxies
| DEFA14A | Annual Meeting | May 11, 2026 | ||
| DEF 14A | Annual Meeting of Shareholders | View Diff | May 11, 2026 | |
| DEFR14A | Revised proxy | Mar 10, 2026 | ||
| DEF 14A | Special Meeting of Shareholders | View Diff | Feb 23, 2026 | |
| PRE 14A | Special Meeting of Shareholders | View Diff | Feb 4, 2026 | |
| DEFA14A | Additional proxy soliciting materials | Apr 14, 2025 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 14, 2025 | |
| PRE 14A | Preliminary proxy | View Diff | Apr 4, 2025 | |
| DEFA14A | Additional proxy soliciting materials | Apr 9, 2024 | ||
| DEF 14A | Definitive proxy | View Diff | Apr 9, 2024 |
Other
| EFFECT | Notice of effectiveness | Apr 2, 2026 | ||
| EFFECT | Notice of effectiveness | Apr 2, 2026 | ||
| EFFECT | Notice of effectiveness | Oct 29, 2024 | ||
| CORRESP | Correspondence with SEC | Oct 24, 2024 | ||
| UPLOAD | Letter from SEC | Oct 24, 2024 | ||
| UPLOAD | Letter from SEC | Apr 6, 2022 | ||
| CORRESP | Correspondence with SEC | Mar 25, 2022 | ||
| EFFECT | Notice of effectiveness | Nov 26, 2021 | ||
| UPLOAD | Letter from SEC | Nov 22, 2021 | ||
| CORRESP | Correspondence with SEC | Nov 22, 2021 |
Ownership
| 3 | Portman David J. | Sep 3, 2026 | ||
| SC 13D | Sermonix Pharmaceuticals, Inc. Acquires Stake in Leonabio, Inc. | Aug 31, 2026 | ||
| SC 13D/A | Perceptive Advisors Llc Updates Stake in Leonabio, Inc. | Aug 25, 2026 | ||
| SC 13G/A | Acorn Bioventures, L.p. Updates Stake in Leonabio, Inc. | Aug 20, 2026 | ||
| 4 | Perceptive Advisors Llc | Jul 10, 2026 | ||
| 4 | Perceptive Advisors Llc | Jul 9, 2026 | ||
| 4 | Callori Fred | Jun 24, 2026 | ||
| 4 | Holles Natalie C. | Jun 24, 2026 | ||
| 4 | Silverman Peter B. | Jun 24, 2026 | ||
| 4 | Panzara Michael A. | Jun 24, 2026 |