Shares in Metaplanet surged 15.7% on October 15 after the Japanese investment firm announced its latest purchase of nearly 107 Bitcoin.

With this latest acquisition, Metaplanet now holds a total of 855.5 Bitcoin (BTC), valued at over $56.1 million, according to the firm’s October 15 statement.

The company disclosed that it spent approximately $6.7 million (1 billion yen) to acquire 106.976 BTC, paying around $62,520 per Bitcoin — 5.8% below the market price of $66,200 at the time of the announcement.

Metaplanet’s share price traded at 1,105 yen ($7.38) before the Tokyo Stock Exchange break at 11:30 am local time, reflecting a 15.7% increase from its October 14 close, according to Google Finance data.

Since unveiling its Bitcoin investment strategy in early April, Metaplanet’s share price has soared 480%.

The company has now spent a total of $53.2 million to accumulate its 855 Bitcoin and is up 5.4% on its overall Bitcoin investment.

This recent Bitcoin purchase is part of a broader buying spree by Metaplanet in October. The firm has more than doubled its Bitcoin holdings this month, with four prior purchases, including 109 BTC on October 11 and 108.8 BTC on October 7.

Earlier in the month, Metaplanet acquired a combined 132 Bitcoin across two transactions on October 1 and 3, according to Bitcoin Treasuries data.

Metaplanet’s CEO, Simon Gerovich, has openly acknowledged that his firm’s Bitcoin strategy is inspired by MicroStrategy and its executive chairman, Michael Saylor, whose company holds over 252,000 Bitcoin worth $16.45 billion.

In May, Metaplanet announced plans to utilize “an entire range of capital market instruments” to expand its Bitcoin reserves, similar to MicroStrategy’s approach. This included securing a $6.8 million loan from one of its shareholders to purchase more Bitcoin in August.

Currently, Metaplanet ranks 23rd among public companies with the largest Bitcoin holdings, according to Bitcoin Treasuries.