Grayscale Investments is best known for its Grayscale Bitcoin Trust (GBTC) product, which is currently trading at a steep discount to its assets under management (AUM). But the company has also created a number of other publicly traded products, among them the Grayscale Ethereum Trust (ETHE) which, much like GBTC, provides ether exposure via a trust trading on US over-the-counter (OTC) markets.