Grayscale Ethereum Trust
Grayscale periodically closes off its crypto trusts to so-called "private placement" rounds.
Grayscale's bitcoin and ether trusts now make up almost the entire $13 billion in AUM value.
The firm's bitcoin assets under management rose by more than $3 billion in a week.
Existing shareholders will receive eight additional ETHE shares for each one held, with each new share being a ninth the value and price of the current ones.