Software development firm MicroStrategy has boosted its massive Bitcoin stash yet again, disclosing Monday that it purchased another $2.1 billion worth of the leading cryptocurrency last week in its fifth-straight weekly buy.

MicroStrategy added 21,550 BTC valued at $2.1 billion, with an average purchase price of $98,783, wrote founder and Executive Chairman Michael Saylor on X (formerly known as Twitter). That pushes the firm's tally to 423,650 BTC, valued at nearly $42 billion as of this writing, with an average price of $60,324 per Bitcoin.

Editor's note: This story is breaking and will be updated with additional details.