I was searching for “commercial in confidence” contracts using the full-text search on the EC EDGAR website. While the FAQs state that quotation marks may be used to search for an exact phrase, it also states: “The results set will not be limited only to that phrase, however, and may also include conceptually related phrases.” Unfortunately, the results were too cluttered with “conceptually related phrases” instead of actual contracts marked as commercial in confidence.
To find “commercial in confidence” contracts in securities filings, I ended up turning to Google: site:google.brand.edgar-online.com “commercial in confidence”.