LeonaBio, Inc. SEC filings LONA
LeonaBio, Inc. has 469 filings in SEC EDGAR's recent list, going back to Oct 3, 2014. Its latest annual report, Form ARS, was filed on May 11, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Aug 14, 2026, covering the quarter ended Jun 30, 2026. The most recent current report (Form 8-K) was filed on Sep 22, 2026 (other events). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 4, 2026 | — |
| 4 | Insider transaction | Oct 28, 2026 | Oct 26, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Oct 28, 2026 | — |
| 4 | Insider transaction | Oct 26, 2026 | Oct 26, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Oct 26, 2026 | — |
| 8-K |
Current report
Other events
|
Sep 22, 2026 | Sep 18, 2026 |
| 3 | Initial insider ownership | Sep 3, 2026 | Aug 24, 2026 |
| SCHEDULE 13D | Ownership over 5% (active) | Aug 31, 2026 | — |
| 8-K |
Current report
Other events
|
Aug 26, 2026 | Aug 26, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Aug 25, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 20, 2026 | — |
| 10-Q | Quarterly report | Aug 14, 2026 | Jun 30, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 14, 2026 | Aug 14, 2026 |
| 4 | Insider transaction | Jul 10, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Jul 9, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 4 | Insider transaction | Jun 24, 2026 | Jun 23, 2026 |
| 8-K |
Current report
Shareholder vote results
|
Jun 23, 2026 | Jun 22, 2026 |
| SCHEDULE 13G | Ownership over 5% (passive) | May 15, 2026 | — |
| ARS | Annual report to shareholders | May 11, 2026 | Dec 31, 2025 |
| DEFA14A | Additional proxy material | May 11, 2026 | — |
| DEF 14A | Proxy statement | May 11, 2026 | Jun 22, 2026 |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 4 | Insider transaction | May 7, 2026 | May 5, 2026 |
| 3 | Initial insider ownership | May 7, 2026 | May 5, 2026 |
| 3 | Initial insider ownership | May 7, 2026 | May 5, 2026 |
| 3 | Initial insider ownership | May 7, 2026 | May 5, 2026 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | May 7, 2026 | — |
| 10-Q | Quarterly report | May 7, 2026 | Mar 31, 2026 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 7, 2026 | May 7, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 4 | Insider transaction | Apr 13, 2026 | Apr 9, 2026 |
| 424B3 | Prospectus | Apr 2, 2026 | — |
| 424B3 | Prospectus | Apr 2, 2026 | — |
| EFFECT | Filing | Apr 1, 2026 | — |
| EFFECT | Filing | Apr 1, 2026 | — |
| S-8 | Employee stock plan registration | Apr 1, 2026 | — |
| S-8 | Employee stock plan registration | Apr 1, 2026 | — |
| CORRESP | Letter to the SEC | Mar 31, 2026 | — |
| CORRESP | Letter to the SEC | Mar 31, 2026 | — |
| S-1/A | Amended registration statement | Mar 31, 2026 | — |
| S-1/A | Amended registration statement | Mar 31, 2026 | — |
| 10-K | Annual report | Mar 31, 2026 | Dec 31, 2025 |
| 8-K/A |
Amended current report
Acquisition or sale of assets
|
Mar 31, 2026 | Dec 18, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Mar 26, 2026 | Mar 26, 2026 |
| 8-K |
Current report
Officer or director change, Shareholder vote results, Other events
|
Mar 19, 2026 | Mar 18, 2026 |
| DEFR14A | Filing | Mar 10, 2026 | — |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 4 | Insider transaction | Mar 5, 2026 | Mar 3, 2026 |
| 144 | Notice of proposed sale | Mar 4, 2026 | — |
| DEF 14A | Proxy statement | Feb 23, 2026 | Mar 18, 2026 |
| CORRESP | Letter to the SEC | Feb 20, 2026 | — |
| UPLOAD | Letter from the SEC | Feb 11, 2026 | — |
| UPLOAD | Letter from the SEC | Feb 11, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 6, 2026 | — |
| PRE 14A | Preliminary proxy statement | Feb 4, 2026 | Mar 18, 2026 |
| S-3 | Shelf registration | Jan 20, 2026 | — |
| S-3 | Shelf registration | Jan 20, 2026 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Jan 16, 2026 | — |
| 8-K |
Current report
Officer or director change, Bylaw or fiscal year change, Regulation FD disclosure, Other events
|
Jan 9, 2026 | Jan 7, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jan 8, 2026 | — |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Jan 5, 2026 | Dec 31, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| 4 | Insider transaction | Dec 29, 2025 | Dec 24, 2025 |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 23, 2025 | — |
| 4 | Insider transaction | Dec 23, 2025 | Dec 23, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Dec 23, 2025 | — |
| SCHEDULE 13D/A | Amended ownership over 5% (active) | Dec 22, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Dec 18, 2025 | — |
| 8-K/A |
Amended current report
Material agreement, Unregistered share sale, Regulation FD disclosure, Other events
|
Dec 18, 2025 | Dec 18, 2025 |
| 8-K |
Current report
Material agreement, Unregistered share sale, Regulation FD disclosure, Other events
|
Dec 18, 2025 | Dec 18, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Nov 14, 2025 | — |
| 10-Q | Quarterly report | Nov 6, 2025 | Sep 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 6, 2025 | Nov 6, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Oct 10, 2025 | — |
| 8-K |
Current report
Other events
|
Oct 3, 2025 | Oct 2, 2025 |
| 8-K |
Current report
Change to shareholder rights, Bylaw or fiscal year change
|
Sep 11, 2025 | Sep 10, 2025 |
| 10-Q | Quarterly report | Aug 7, 2025 | Jun 30, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 7, 2025 | Aug 7, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 4 | Insider transaction | Jul 2, 2025 | Jun 30, 2025 |
| 144 | Notice of proposed sale | Jul 1, 2025 | — |
| 144 | Notice of proposed sale | Jul 1, 2025 | — |
| 144 | Notice of proposed sale | Jul 1, 2025 | — |
| 144 | Notice of proposed sale | Jul 1, 2025 | — |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 4 | Insider transaction | Jun 3, 2025 | May 30, 2025 |
| 8-K |
Current report
Shareholder vote results
|
Jun 2, 2025 | May 29, 2025 |
| 10-Q | Quarterly report | May 9, 2025 | Mar 31, 2025 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 9, 2025 | May 9, 2025 |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 16, 2025 | — |
| 8-K |
Current report
Listing notice
|
Apr 16, 2025 | Apr 15, 2025 |
| ARS | Annual report to shareholders | Apr 14, 2025 | Dec 31, 2024 |
| DEFA14A | Additional proxy material | Apr 14, 2025 | — |
| DEF 14A | Proxy statement | Apr 14, 2025 | May 29, 2025 |
| PRE 14A | Preliminary proxy statement | Apr 4, 2025 | May 29, 2025 |
| 4/A | Filing | Mar 12, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| 4 | Insider transaction | Mar 4, 2025 | Mar 3, 2025 |
| S-8 | Employee stock plan registration | Feb 27, 2025 | — |
| 10-K | Annual report | Feb 27, 2025 | Dec 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Feb 27, 2025 | Feb 27, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 4 | Insider transaction | Jan 3, 2025 | Dec 31, 2024 |
| 144 | Notice of proposed sale | Jan 2, 2025 | — |
| 144 | Notice of proposed sale | Jan 2, 2025 | — |
| 144 | Notice of proposed sale | Jan 2, 2025 | — |
| 144 | Notice of proposed sale | Jan 2, 2025 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| 10-Q | Quarterly report | Nov 7, 2024 | Sep 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Nov 7, 2024 | Nov 7, 2024 |
| SC 13G | Ownership over 5% (passive) | Nov 7, 2024 | — |
| SC 13D/A | Amended ownership over 5% (active) | Oct 31, 2024 | — |
| EFFECT | Filing | Oct 28, 2024 | — |
| UPLOAD | Letter from the SEC | Oct 24, 2024 | — |
| CORRESP | Letter to the SEC | Oct 24, 2024 | — |
| S-3 | Shelf registration | Oct 21, 2024 | — |
| 8-K |
Current report
Listing notice, Other events
|
Oct 18, 2024 | Oct 16, 2024 |
| 8-K |
Current report
Officer or director change
|
Oct 7, 2024 | Oct 1, 2024 |
| 4/A | Filing | Oct 3, 2024 | Oct 3, 2024 |
| 4 | Insider transaction | Oct 3, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 3, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 3, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 3, 2024 | Oct 1, 2024 |
| 4 | Insider transaction | Oct 3, 2024 | Oct 3, 2024 |
| 3 | Initial insider ownership | Oct 3, 2024 | Oct 1, 2024 |
| 8-K |
Current report
Exit or restructuring costs, Officer or director change
|
Sep 17, 2024 | Sep 15, 2024 |
| 144 | Notice of proposed sale | Sep 5, 2024 | — |
| 4 | Insider transaction | Sep 5, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 5, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 5, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 5, 2024 | Sep 3, 2024 |
| 4 | Insider transaction | Sep 5, 2024 | Sep 3, 2024 |
| 8-K |
Current report
Regulation FD disclosure, Other events
|
Sep 3, 2024 | Sep 3, 2024 |
| 10-Q/A | Amended quarterly report | Aug 9, 2024 | Jun 30, 2024 |
| 10-Q | Quarterly report | Aug 1, 2024 | Jun 30, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
Aug 1, 2024 | Aug 1, 2024 |
| 4 | Insider transaction | Jun 25, 2024 | Jun 21, 2024 |
| 8-K |
Current report
Shareholder vote results
|
May 29, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 24, 2024 |
| 8-K |
Current report
Other events
|
May 17, 2024 | May 3, 2024 |
| 10-Q | Quarterly report | May 15, 2024 | Mar 31, 2024 |
| 8-K |
Current report
Results of operations, Regulation FD disclosure
|
May 15, 2024 | May 15, 2024 |
| 4 | Insider transaction | Apr 16, 2024 | Apr 15, 2024 |
| 3 | Initial insider ownership | Apr 16, 2024 | Apr 15, 2024 |
| ARS | Annual report to shareholders | Apr 9, 2024 | Dec 31, 2023 |
| DEFA14A | Additional proxy material | Apr 9, 2024 | — |
| DEF 14A | Proxy statement | Apr 9, 2024 | May 23, 2024 |
| PRE 14A | Preliminary proxy statement | Mar 28, 2024 | May 23, 2024 |
| S-8 | Employee stock plan registration | Feb 22, 2024 | — |
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Company profile
- Industry
- Biological Products, (No Diagnostic Substances) (SIC 2836)
- Listed as
- LONA (Nasdaq)
- Fiscal year ends
- December 31
- Headquarters
- Bothell, WA
- SEC filer status
- Non-accelerated filer, Smaller reporting company
- SEC CIK
- 1620463
- Former names
- Athira Pharma, Inc. (until Jan 8, 2026); M3 Biotechnology, Inc. (until Jan 23, 2019)
Other Biological Products, (No Diagnostic Substances) companies
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All 182 Biological Products, (No Diagnostic Substances) companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.