SEDAR and EDGARBoth are free websites with financial information for publicly traded companies. They contain annual reports, 10Ks, and other company filings.
SEDAR (https://sedar.com/) is a mandatory document filing and retrieval system for Canadian public companies administered by the Canadian Securities Administrators.
EDGAR (https://www.sec.gov/edgar.shtml) is the filing system operated by the Securities and Exchange Commission for the United States.
Largo's filings in EDGAR Largo's filing on NASDAQ application [April 14 ??]