Bitmine Bought Its Way to 5% of Ethereum by Selling Its Own Stock. The Easy Part Is Over

Bitmine Immersion Technologies and its chairman, Tom Lee, have spent fifteen months doing something no other public company has: steadily buying up roughly one in every twenty Ether in existence. This past week it added another 28,086 ETH, lifting the treasury to 5,929,198 tokens — 4.9% of the entire Ethereum supply — and leaving only about 122,000 coins to a round 5%. The company calls it the "Alchemy of 5%," and it has been remarkably good for the stock: BMNR is up 99% since joining the Russell 1000 in late June, the fourth-best performer in the whole index.

The part worth understanding is the word "alchemy," because the strategy is not really about mining, or even about holding Ethereum as a store of value. It is a machine that turns Bitmine's own shares into ETH. And the machine's most important input — a stock that sells for more than the coins it buys — has quietly stopped working.

What the machine did

Bitmine started as a modest bitcoin miner before pivoting in June 2025 into an Ethereum treasury. The playbook is borrowed from Strategy Inc., the company that built a multibillion-dollar bitcoin hoard: issue new stock, buy the coin, and let rising per-share coin holdings pull more investors in. But where Strategy funds mostly with convertible debt, Bitmine has leaned almost entirely on its equity.

The scale of that equity machine is the story. In August 2025 the company increased its at-the-market common-stock program to as much as $24.5 billion, after already selling roughly 106.6 million shares for about $4.5 billion. A month later it placed $365 million of common stock at $70 a share — a 14% premium to the market price — and Tom Lee called the deal "materially accretive to existing shareholders." The share count went from about 122 million to roughly 552 million in a year. Each issuance, when sold at a premium to the ETH it bought, gave every existing share slightly more Ether behind it. That was the alchemy.

Piled on top is the yield. Bitmine has staked 5,067,309 ETH — 85% of its holdings — on its own validator network, MAVAN, at a 7-day annualized yield of 2.61%, projected as roughly $330 million a year in staking revenue. At bottom, the pitch to shareholders is: leveraged Ethereum, earning yield while it grows.

Why the premium mattered

Here is where the game changes. All of that per-share magic depended on the common stock selling for more than the assets behind each share. When that premium holds, printing shares and buying coins is a gift to existing holders — each new dollar of equity buys more than its pro-rata slice of the treasury. The moment the stock trades at only its net asset value, issuing shares buys exactly the same Ether per share as before. Below it, issuance actually dilutes.

That premium is now essentially gone. Bitmine's total holdings stood at $15.7 billion as of September 7 — about $14.8 billion of it Ethereum, plus $593 million in cash and marketable securities and a couple of speculative stakes. The market capitalizes BMNR at roughly $14 billion to $16 billion on any given day — one tracker counted $13.8 billion, another $15.96 billion. In other words, the whole company — every Ether, every miner, every stake — is priced at approximately the value of what it owns. A year and a half ago it was selling at a premium that made the whole engine accretive; by late 2025 external analysis had it trading at a 20% discount to book, which is precisely why management had to start a $4 billion buyback program.

When the stock hovers at its own asset value, the arithmetic stops working in the shareholder's favor at exactly the moment the financing gets more expensive. The most recent raise was not cheap common stock at a premium but $280 million of perpetual preferred shares carrying a fixed 9.5% dividend. Compare that 9.5% cost of money to the 2.6% yield the freshly bought Ethereum earns, and the carry is deeply negative. The rest of the income statement carries the same signature: by one estimate, trailing-twelve-month net income came to roughly negative $8.8 billion, with stock-based compensation running at about 64% of revenue. This is not a business that earns a return on its capital; it is a vehicle that borrows the market's enthusiasm for one asset — its own shares — to buy another.

What is actually real

None of this means the position is worthless, and it is worth being precise about what remains when the speculation fades. Bitmine is now the single largest holder and staker of Ethereum in the world, with 85% of its coins running through its own validator network. That is a genuine control point: the network's biggest operator gets a recurring cut of staking rewards and influence over how the chain's economics are shared, and no one else holds a comparable seat. It is the kind of infrastructure position that can matter for years.

But there is the rub for a shareholder. The value of owning 4.9% of Ethereum only materializes if Ethereum itself rises — or if Bitmine can ever sell a position that large without moving the market against it. The 2.6% staking yield does not cover the cost of the shares and preferred stock sold to buy the coins. So BMNR common is, in substance, a roughly one-to-one bet on ETH appreciation wrapped in an expensive capital structure, and the "alchemy" that once let each share capture extra Ether for free has flattened into something closer to a leveraged index.

That is what makes the final stretch to 5% the most interesting part of the trade rather than a milestone. The company has about 122,000 ETH to go — roughly $300 million at today's price — and it holds $593 million in cash, so it can plausibly finish. Finishing removes the story that paid for the machine: once the premium is gone and the accumulation target is met, whatever per-share growth remains has to come from Ethereum moving up on its own, not from the company's own engineered arithmetic.

A careful investor might ask the question differently from the headline. It is not whether Bitmine reaches 5% — it very likely will. It is whether a stock that now trades at its own assets can keep producing the per-share growth that its premium-priced share sales once delivered for free. The fifteen-month run that built the world's largest Ethereum treasury was financed by a market willing to pay more for the shares than the coins they bought. That market, on the eve of the goal it was chasing, has already figured out the trade.