Metaplanet Goes Full Siiiibo: Japanese Bitcoin Treasury Snaps Up a Securities Firm 🏦

Metaplanet, the Japan-listed Bitcoin treasury company, has agreed to acquire 100% of the shares of Siiibo Securities Co., Ltd., a Type I Financial Instruments Business Operator that runs an online platform for individual investors' corporate bond offerings, the company said on June 12, 2026. The transaction is expected to close in July, after which Siiibo Securities will be rebranded as Metaplanet Securities Co., Ltd.

Chief Executive Officer Simon Gerovich announced the deal on X, writing, "We are pleased to report that we have entered into an agreement to acquire all shares of Siiibo Securities Co., Ltd." He separately described the acquisition as "our company's first full-scale M&A" and "the initial concrete step in Project Nova, which aims to build a financial ecosystem centered on Bitcoin." A Tokyo Stock Exchange press release was linked in Gerovich's post.

Metaplanet stated that the acquired entity would support the development of Bitcoin-related yield products in Japan, marking the company's first move into regulated financial services since adopting its Bitcoin-centric treasury strategy. The firm, often referred to in coverage as Asia's answer to MicroStrategy, has been steadily expanding its BTC holdings alongside broader corporate activities.

The acquisition adds a licensed securities platform to Metaplanet's balance sheet, giving the company direct infrastructure for issuing and distributing fixed-income products once the integration is complete. Siiibo's existing client base and Type I license were cited as the primary drivers behind the purchase.

No purchase price for the all-shares transaction has been disclosed in the announcement, and Metaplanet did not provide a projected launch date for the planned Bitcoin yield products. The rebranding of the subsidiary to Metaplanet Securities Co., Ltd. is set to take effect after the deal's expected July closing.