Bitcoin mining company Riot Platforms submitted a document to the U.S. Securities and Exchange Commission (SEC) on December 11, showing that the company has successfully completed a $525 million issuance of senior notes. These notes, which mature in 2030, have an interest rate of 0.75% and were issued privately to institutional investors. The proceeds will primarily be used to drive the company's Bitcoin acquisition strategy, further expanding its holdings. (Cryptoslate)