Bitmine Buys 10,399 ETH in a Week, Now Holds 4.8% of Total Ethereum Supply

Ethereum treasury firm Bitmine added 10,399 ETH to its balance sheet over the past week, pushing its total holdings to approximately 4.8% of the entire Ethereum supply, while simultaneously announcing an extension of its BMNR share buyback program.

The purchase cements Bitmine, led by prominent crypto analyst Tom Lee, as one of the largest single corporate holders of Ether. The company has modeled its accumulation strategy explicitly on MicroStrategy's long-running Bitcoin treasury playbook: buy aggressively, hold on the balance sheet, and use the stock as a vehicle for continued purchases. Whether that parallel holds in practice is a separate question.

The buyback announcement adds another layer to that corporate finance parallel. Repurchasing shares while simultaneously acquiring large amounts of ETH signals that Bitmine is trying to manage both sides of its capital structure at once, supporting the stock price while expanding its crypto reserves. The market, for now, is unconvinced. BMNR shares declined despite both announcements, suggesting investors are not yet pricing the ETH accumulation as a net positive at current valuations.

That stock reaction is worth examining. When MicroStrategy began its Bitcoin treasury strategy in 2020, MSTR shares initially lagged before eventually trading at a significant premium to the underlying Bitcoin holdings. Bitmine may be in an analogous early phase, or the market may be pricing in real risks. The concentration of 4.8% of Ethereum's circulating supply in a single corporate entity raises legitimate centralization concerns, and the company has not disclosed in detail how it is funding continued purchases of this scale. Sustained ETH accumulation at this pace requires either substantial cash reserves, ongoing equity issuance, or debt, each carrying its own risk profile.

The 4.8% figure itself deserves scrutiny. Ethereum's total supply sits at roughly 120 million ETH as of mid-2026, which would put Bitmine's holdings at approximately 5,760 ETH at that percentage, broadly consistent with the 5,797 ETH figure reported in the company's disclosures. The discrepancy between the week's purchase volume and the total holdings figure suggests Bitmine held a smaller position before this latest tranche and is scaling rapidly.

For the broader Ethereum market, institutional accumulation of this magnitude is a structural demand signal. Corporate treasury adoption of ETH has lagged Bitcoin by several years, and Bitmine is one of a small number of public companies actively building an ETH-denominated balance sheet. If BMNR stock eventually trades at a premium to net asset value, as MSTR did at peak enthusiasm, it could attract imitators and accelerate institutional ETH demand. The near-term stock decline, however, is a reminder that the market assigns its own timeline to those outcomes.