The Securities and Exchange Commission is ratcheting up its purview of the crypto industry after filing a Wells Notice against Robinhood's crypto arm on Monday. 

In a Form 8-K filed on Monday, Robinhood Crypto, the crypto unit of the brokerage firm Robinhood Markets, said it had received a Wells Notice from the SEC. The exchange said the SEC staff has decided to recommend an enforcement action against the crypto unit, alleging securities violations, according to the form used to announce major events to shareholders. 

Robinhood's Wells Notice is one of a handful filed against crypto entities over the past month. Consensys, the crypto firm behind MetaMask Wallet, and decentralized crypto exchange Uniswap have said they also received Wells Notices from the SEC last month.