Adam Back and TOBAM Double Down as Capital B Raises €21M to Stack More BTC
Capital B closed a €21M private placement with repeat strategic investors Adam Back and TOBAM, targeting 270 additional BTC. Four warrants per share could unlock ~€135M more over five years, and the raise succeeded above market price during a sector-wide downturn.
Europe's self-described first bitcoin treasury company closes a fresh raise with insider conviction, not fresh believers.
Key takeaways
- Capital B (Euronext: ALCPB) raised €21 million (~$24M) in a private placement on August 28, 2026, with existing strategic investors Adam Back (Blockstream) and TOBAM leading the round.
- Net proceeds of ~€19.9M target the purchase of roughly 270 additional BTC, which would push the company's stack from 3,145 to approximately 3,415 bitcoin.
- Each of the 36.2 million shares sold carries four warrants exercisable at €0.75, €0.98, and €1.27 over five years, creating a conditional pipeline of up to ~€135M in additional capital.
Capital B closed a €21 million private placement on August 28, 2026, with Blockstream CEO Adam Back and Paris-based asset manager TOBAM deepening existing positions, per the company's official press release. Both Back and TOBAM participated in the company's May 2026 raise as well. These are not newcomers buying the pitch; they are insiders who already have full visibility into the operation and are choosing to add.
The placement sold 36,219,070 shares structured as ABSAs at €0.58 each, with net proceeds expected to reach approximately €19.9 million after fees. Placement agent Maxim Group handled the deal on a sole, best-efforts basis, with closing expected from August 31 at the earliest, barring technical delays. A 1-for-10 reverse stock split is scheduled for September 8, 2026.
The Warrant Structure Is the Real Story
The headline number is €21M. The structure underneath it is more interesting.
Each share sold carries four warrants with five-year maturities, exercisable at €0.75 (two tranches), €0.98, and €1.27. Full exercise of all warrant classes would generate approximately €135.8 million in additional capital, conditional on Capital B's share price reaching those levels. That turns a €21M raise into a potential first tranche of a substantially larger accumulation engine, provided BTC keeps climbing and the shares re-rate accordingly.
Capital B currently holds 3,145 BTC, acquired largely through a series of raises in the first half of 2026. In May, the company deployed ~€13M from three prior placements to acquire 192 BTC. The company tracks "BTC Yield" (bitcoin per fully diluted share growth over time) as its primary performance metric, a KPI borrowed directly from Strategy's playbook. The stated target after deploying this raise's net proceeds is approximately 3,415 BTC.
That the raise priced above Capital B's own market on the day is worth noting. At the time of the raise, the shares were trading at roughly 0.60x BTC NAV per data cited by Bitcoin Treasuries trackers, meaning the company's equity was at a meaningful discount to its underlying bitcoin holdings. Issuing shares at a premium to the trading price but a discount to NAV is the standard treasury-company tension: Back and TOBAM are buying in at a price above where the market cleared that morning, which tells you something about their conviction on the forward trajectory.
The treasury shakeout playing out across the sector is the right backdrop here. Bitcoin treasury companies have faced significant headwinds since mid-2025. Against that backdrop, a company trading below NAV still managed to price a raise above market and shares were reported to have climbed on the announcement day, though that intraday move should be verified against Euronext's live data. The ones with credible, committed anchor investors can still raise and accumulate through the down cycle. Capital B is making that case in real time.
The European Theater of the Treasury Wars
Strategy dominates the conversation in the US. What Capital B is building is the EU-listed equivalent, with a cypherpunk stamp of approval from the man who invented Hashcash and whose work laid the intellectual foundation for Bitcoin's proof-of-work.
Back is not a passive check-writer. His technical credibility and his repeat participation in Capital B's raises signal something more than portfolio diversification. European institutions, family offices, and asset managers watching this story will note that a figure of Back's stature keeps doubling down at sub-NAV prices on a Euronext-listed vehicle. That is a very different signal than a first-time institutional allocator taking a flyer.
TOBAM's participation reinforces the point. The Paris-based quantitative asset manager built its reputation on maximum-diversification strategies. Their repeat investment into a single-asset bitcoin treasury is a deliberate departure from that frame, and it is the kind of conviction signal that European allocators pay attention to.
Metaplanet's Superplanet deal extends the playbook into the US via a Nasdaq-listed vehicle. Capital B is doing the same in Europe. The Strategy model is being replicated across continents, and in each case the credibility of the anchor investors is what separates disciplined accumulation from noise.
What to Watch
The thesis breaks if Capital B fails to deploy the €19.9M net proceeds into BTC within a reasonable window after the August 31 close, or if Back and TOBAM begin reducing their positions in subsequent Euronext filings. The falsifiable signal is deployment speed and direction of subsequent insider activity. A reverse stock split on September 8 will also adjust warrant terms proportionally; watch the post-split capital structure for any changes to the accumulation trajectory.
Sources
Frequently Asked Questions
TOBAM is a Paris-based quantitative asset manager historically associated with maximum-diversification investment strategies, not Bitcoin-native allocations. Their repeated participation in Capital B's raises, now through at least two consecutive placements, signals institutional-grade conviction from a firm that came to bitcoin from outside the Bitcoin community. For European allocators still on the fence about treasury-company vehicles, TOBAM's continued presence is a meaningful reference point.
BTC Yield measures the growth in bitcoin per fully diluted share over time. It is the key performance metric used by Strategy and adopted by Capital B to evaluate whether share issuances are accretive to existing holders. A dilutive-looking equity raise can still improve BTC Yield if the proceeds purchase enough bitcoin to increase each fully diluted share's pro-rata claim on the treasury. It is the correct metric for a treasury company and the right number to track when evaluating whether management is doing the job.
