Mergent Online is a great first-stop resource for financial information of publicly-traded businesses worldwide, and includes scanned annual reports and 10Ks. Mergent also links to EDGAR (Securities and Exchange Commission) filings and corporate histories.
In addition, Mergent offers other government filings in a variety of downloadable formats (PDF, html, MS Word, and MS Excel). A wealth of other financial reports are available, including equity reports (look under the Reports tab for equity reports).
Mergent can be accessed online with your SFPL library card number and PIN.
Older annual reports (older than 1996) can be much harder to find. The Library has a collection of older annual reports -- some dating back to 1967 -- on microfiche. Quarterly reports, proxy statements and 10Ks may also be available. For help finding annual reports on microfiche, ask at the Business, Science & Technology Center desk on the 4th floor. The fiche must be used in the Library on our 5th floor microfiche readers and printers (yes, reports can be printed).