Company Analysis

LeonaBio, Inc. (LONA)

Nasdaq: LONA · Biological Products, (No Diagnostic Substances) · Bothell, WA · filing with the SEC since 2014
Grade5.3
◀ Past 5.4● Present 4.4▶ Future 6.0
6 est.

Filings

245 filings since 2017 beside 221 insider forms · Non-accelerated filer and smaller reporting company · read from EDGAR on Nov 13, 2026
Due nextNon-accelerated filer and smaller reporting company
10-Q Quarterly report for the quarter ending Sep 30, 2026Non-accelerated filers and smaller reporting companies have 45 days after the quarter ends; quarter ends are taken to the month end. by Nov 14, 2026
10-K Annual report for the fiscal year ending Dec 31, 2026Non-accelerated filers and smaller reporting companies have 90 days after the fiscal year ends. by Mar 31, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 45 days after the quarter ended. The proxy statement was last filed May 11, 2026.

Filings a yearinsider forms included
249589143686587
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Officer or director change (8-K item 5.02): 6 times in the last 36 months, the newest Mar 19, 2026.Listing warning from its exchange (8-K item 3.01): 2 times in the last 36 months, the newest Apr 16, 2025.SEC letters: 7 in the last 36 months, the newest Mar 31, 2026.
Insider forms 221

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 4, 2026 SCHEDULE 13G Large holder notice
Oct 28, 2026 SCHEDULE 13D/A Activist holder update, amended
Oct 26, 2026 SCHEDULE 13D/A Activist holder update, amended
Sep 22, 2026 8-K item 8.01 Other event · Current report Sep 18, 2026
Aug 31, 2026 SCHEDULE 13D Activist holder notice
Aug 26, 2026 8-K item 8.01 Other event · Current report
Aug 25, 2026 SCHEDULE 13D/A Activist holder update, amended
Aug 20, 2026 SCHEDULE 13G/A Large holder update, amended
Aug 14, 2026 10-Q Quarterly report Jun 30, 2026
Aug 14, 2026 8-K items 2.02, 7.01, 9.01 Results released; Investor disclosure (Regulation FD) · Current report
Jun 23, 2026 8-K item 5.07 Shareholder vote · Current report Jun 22, 2026
May 15, 2026 SCHEDULE 13G Large holder notice
May 11, 2026 ARS Annual report to shareholders Dec 31, 2025
May 11, 2026 DEFA14A Extra proxy material
May 11, 2026 DEF 14A Proxy statement Jun 22, 2026
May 7, 2026 SCHEDULE 13D/A Activist holder update, amended
May 7, 2026 10-Q Quarterly report Mar 31, 2026
May 7, 2026 8-K items 2.02, 7.01, 9.01 Results released; Investor disclosure (Regulation FD) · Current report
Apr 2, 2026 424B3 Shelf offering
Apr 2, 2026 424B3 Shelf offering
Apr 1, 2026 EFFECT Registration effective
Apr 1, 2026 EFFECT Registration effective
Apr 1, 2026 S-8 Employee stock plan registration
Apr 1, 2026 S-8 Employee stock plan registration
Mar 31, 2026 CORRESP Reply to the SEC
Mar 31, 2026 CORRESP Reply to the SEC
Mar 31, 2026 S-1/A Listing registration, amended
Mar 31, 2026 S-1/A Listing registration, amended
Mar 31, 2026 10-K Annual report Dec 31, 2025
Mar 31, 2026 8-K/A items 2.01, 9.01 Purchase or sale of a business completed · Current report, amended Dec 18, 2025
Mar 26, 2026 8-K items 2.02, 7.01, 9.01 Results released; Investor disclosure (Regulation FD) · Current report
Mar 19, 2026 8-K items 5.02, 5.07, 8.01, 9.01 Officer or director change; Shareholder vote; Other event · Current report Mar 18, 2026
Mar 10, 2026 DEFR14A Revised proxy statement
Feb 23, 2026 DEF 14A Proxy statement Mar 18, 2026
Feb 20, 2026 CORRESP Reply to the SEC
Feb 11, 2026 UPLOAD SEC comment letter
Feb 11, 2026 UPLOAD SEC comment letter
Feb 6, 2026 SCHEDULE 13G/A Large holder update, amended
Feb 4, 2026 PRE 14A Preliminary proxy statement Mar 18, 2026
Jan 20, 2026 S-3 Shelf registration
40 of 245 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton LONA · research, not advice