A privately operated US quotation service that provides electronic quotes and print quotes for over-the-counter equity securities. Issuers of securities included in the Pink Sheets do not have to pay fees or make filings with the Pink Sheets and, unlike the OTC Bulletin Board, do not have to comply with the periodic reporting requirements under the US Securities Exchange Act of 1934. The Pink Sheets are so-called because the quotes were originally distributed on pink paper.

For further information, see the Pink Sheets website.