Capital B buys additional 4 Bitcoin, increasing total to 3,525 BTC

Capital B, the French-listed firm that has positioned itself as Europe's answer to MicroStrategy, added another 4 BTC to its balance sheet on September 14 for €270,000. The purchase brings the company's total strategic Bitcoin holdings to 3,525 BTC, worth a combined €309.7 million at its aggregate cost basis.

The tiny weekend top-up came just a week after a much more dramatic move. On September 7, Capital B scooped up 376 BTC for €25.3 million, which stands as the company's largest single acquisition of 2026. That purchase alone represented more than a 10% increase in the firm's holdings at the time.

Across its entire Bitcoin treasury, Capital B has spent an average of €87,854 per BTC. The company reports a year-to-date BTC Yield of 2.19%, a metric it borrowed from the MicroStrategy playbook to measure how effectively it's growing Bitcoin per share over time. In more concrete terms, that translates to a BTC Gain of 61.9 BTC and a BTC € Gain of €4.2 million so far this year.

To fund the buying spree, Capital B has raised approximately €30.1 million in recent capital raises, primarily through equity issuances rather than debt. Among the notable participants: Adam Back, the CEO of Blockstream, who holds a 17.64% stake in the company.