Capital B Begins Trading on Cboe Europe as Trading Volume Doubles

Europe's first Bitcoin treasury company added the continent's largest equities venue to its execution infrastructure on 5 August. Aggregate trading in ALCPB had already doubled before the session was two hours old.

Capital B's ordinary shares - ticker ALCPB, primary listing on Euronext Growth Paris - began trading on Cboe Europe's BATE, CHIX and CEUX order books on 5 August 2026. Valentin Kosanovic, the company's Deputy Director of Bitcoin Strategy, confirmed the listing on X and described it as a step in widening ALCPB's institutional investor base across the continent.

The venue Capital B has joined is not a marginal one. Cboe Europe held its position as Europe's largest equities exchange throughout the first quarter of 2026, with an average market share of 25.5 per cent - its highest level since the fourth quarter of 2011. The exchange offers trading in securities from 18 countries, and trades clear through Cboe Clear Europe, an Amsterdam-headquartered central counterparty regulated by De Nederlandsche Bank. Cboe's own marketing materials describe Clear Europe as offering clearing services across 47 trading venues.

The practical effect is one of access, not optics. Any broker already connected to Cboe Europe can route an order to ALCPB through standard execution channels, without a bespoke connection to Euronext Paris. Deputy Director of Bitcoin Strategy, Valentin Kosanovic put it bluntly: Capital B's "job's not done" on widening that access - a line that reads as intent for further additions, not a one-off.

Order Flow Concentrated on One New Venue, Not Six

The clearest evidence of the listing's effect came from Alexandre Laizet, Capital B's Board Director of Bitcoin Strategy, who posted a venue-by-venue volume breakdown around two hours into the first session. Aggregate ALCPB volume had already doubled against the equivalent pre-listing period, Laizet said.

The breakdown shows where that volume actually landed. Euronext Paris, the primary listing, handled 323,840 shares in the window Laizet measured. Cboe's own book took more: 435,020 shares, making it the single busiest venue for ALCPB within two hours of going live - ahead of the primary market it was meant to supplement.

That pattern matters more than the headline "volume doubled" figure. New liquidity is concentrating on the single Cboe venue attracting the fastest broker attention.

The Listing Follows a Balance Sheet Clean-Up, Not Precedes It

The timing is not incidental. Two days before the Cboe listing, on 3 August, Capital B confirmed group Bitcoin holdings of 3,140 BTC, an acquisition value of €283.9 million at an average cost of €90,407 per bitcoin, and a BTC Yield of 2.13 per cent year-to-date. The same disclosure confirmed the conversion of 14,195,352 OCA B-01 convertible bonds held by Blockstream Capital Partners into 28,687,362 new ordinary shares, closing out the last of that instrument.

Read together, the two disclosures describe a company tidying its capital structure and widening its distribution in the same week. The OCA B-01 conversion removes an overhang that had sat on the share count since issuance; the Cboe listing widens the pool of brokers who can trade the resulting stock without friction. Neither event depends on the other, but the sequencing is the kind that typically precedes a push for deeper index or institutional mandate eligibility, rather than follows one.