Japanese bitcoin treasury firm Metaplanet has boosted its holdings with the acquisition of 5,268 BTC worth 91.6 billion yen ($623 million). The purchase, made at an average price of 17.4 million yen ($118,328) per coin, raises the company’s total bitcoin stash to 30,823 BTC.

CEO Simon Gerovich revealed on X that this move places Metaplanet as the world’s fourth-largest publicly traded bitcoin treasury company, trailing only Strategy, MARA Holdings, and XXI. The latest buy follows a $632 million purchase on Sept. 21, which remains the company’s biggest bitcoin acquisition to date.

Financially, Metaplanet reported Q3 revenue of 2.438 billion yen ($16.5 million), marking a 115.7% jump from Q2. The firm is also advancing its bitcoin-focused strategy by raising $1.4 billion through 385 million new shares and establishing a U.S. subsidiary, Metaplanet Income Corp., aimed at expanding “bitcoin income generation” through derivatives and related activities.