New York-based derivatives exchange Bakkt is delisting three popular altcoins due to recent regulatory developments in the United States. According to a Fortune report, trading of (SOL), Polygon (MATIC) and (ADA) has been suspended.

The decision follows last week’s lawsuits brought by the United States Securities and Exchange Commission against crypto exchanges Binance and Coinbase (NASDAQ:). In the complaints, the regulator labeled over 20 digital assets as securities, including SOL, MATIC and ADA. The total number of cryptocurrencies the U.S. regulator sees as a “security” has now reached an estimated 68.

SOL’s market capitalization over the past 30 days. Source: CoinMarketCap