The cinema operator has taken advantage of a red-hot rally in its stock since mid-May to sell shares, raising $587.4 million on Thursday alone.
The company said late on Thursday it would ask shareholders to authorize the sale of 25 million additional shares, compared with its initial plan to ask for approval for 500 million shares.
AMC’s shares were trading at $48.25 before the bell after closing down 18 per cent on Thursday. They hit a record high of $72.62 on Wednesday.
US-listed shares of BlackBerry Ltd, another so-called “meme stock” that has gripped the attention of small-time traders on online discussion forums, were up 7 per cent.