Metaplanet Inc. (3350) expanded its Bitcoin holdings with the purchase of 1,009 BTC, worth roughly $112 million, pushing its total treasury to 20,000 BTC. This move overtakes Riot Platforms (RIOT) and positions Metaplanet as the corporate entity with the sixth-largest Bitcoin reserve.
The Tokyo-based company’s latest acquisition reflects its ongoing strategy of treating Bitcoin as a key reserve asset. A filing released Monday shows the firm’s cumulative Bitcoin purchases now total 302.3 billion yen, at an average cost of 15.1 million yen per BTC.
Metaplanet’s rapid accumulation has made it one of Asia’s most prominent publicly traded Bitcoin adopters. Between July 1 and September 1, the company achieved a BTC yield of 30.7%, with its multiple to net asset value (mNAV) just below 2.
Despite the milestone purchase, shares of Metaplanet fell 5.5%, closing at 831 yen.

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