Bitmine's Ether buys poised to stop in weeks as 5% ceiling approaches

When Bitmine halts purchases, the market loses a steady buyer whose demand was unresponsive to price. Still, the company's bid has already shrunk to about a tenth of its May pace, so much of the adjustment has probably already been priced in. The bigger swing factor for Ether is whether flows into spot ETFs, together with broader risk appetite, can take the place of demand from treasury companies. If Bitmine shifted to selling staking rewards, a small but persistent supply overhang would emerge. Trading in Bitmine shares now reflects staking income and buybacks more than ETH accumulation.

Ether's most consistent corporate purchaser is close to halting, yet the market has been reducing its reliance on Bitmine's bids since May, so the key question is what buyer arrives next.

Summary:

• At Token2049, Tom Lee stated Bitmine would cap its Ether holdings at 5% of supply, converting a goal into a firm limit.
• As of 11 October, Bitmine owned roughly 6.03 million ETH, equal to 4.9% of the total supply of about 122.1 million.
• It is therefore about 76,000 ETH away from the ceiling, and the latest purchase pace points to hitting it in mid-to-late November.
• Its weekly buying has dropped from over 111,000 ETH in May to roughly 12,500.
• Around 5.07 million ETH is staked, and staking income could lift holdings past 5% even without further buying.
• Lee contends the cap removes any need to seek capital and should help Bitmine shares outperform ETH in a rally.

Bitmine Immersion Technologies, the biggest corporate holder of Ether, is only weeks away from concluding a purchase programme that has topped up its treasury with ETH each week since June 2025. Chairman Tom Lee turned the firm's long-standing 5% supply target into a binding maximum. According to Cointelegraph, Lee said at Token2049 in Singapore on 7 October that Bitmine would go no higher than 5% of Ether's supply. That represented a change from previous remarks, when he said the company could hold more if Ethereum adoption continued to expand.

The most recent weekly disclosure put Bitmine's holdings at about 6.03 million ETH on 11 October, or 4.9% of a total supply near 122.1 million. That is roughly 76,000 ETH below the cap. With purchases running at about 12,500 to 15,000 ETH weekly, the limit would be reached around mid-to-late November, although the company holds over $600 million in cash and marketable securities and could speed up the process if it wanted.

For over twelve months, Bitmine has ranked among the steadiest buyers of ETH, accumulating even as the token declined roughly 10% in the first nine months of 2026. Its bid has nonetheless contracted considerably. In May, weekly purchases reached more than 111,000 ETH, compared with about 12,500 in the week ended 11 October. Most of the impact from Bitmine's retreat has probably been absorbed by the market already, so the halt in buying is more of a formality than an abrupt demand shock.

Lee frames the ceiling as a positive for investors, saying Bitmine no longer has to raise capital for ETH purchases and that its stock ought to outpace the token during a rally. That assessment remains the company's own rather than a proven result, and the stake was sitting on an unrealised loss of about $4.5 billion around the time he spoke.

Staking complicates the picture. Bitmine has roughly 5.07 million ETH staked, which means those tokens are locked into securing the Ethereum network and generate rewards in newly issued ETH. Those rewards could carry the firm's holdings above 5% even if it buys nothing. Lee has indicated that staking income could be sold to keep the total under the cap, yet he has also said there is little cause to sell ETH, since staking rewards cover dividends on its preferred shares.

Signals to follow in the coming weeks include the weekly holdings updates and the week Bitmine says it has hit 5% and stops buying; any move to sell staking rewards, which would flip a consistent buyer into a modest but recurring seller; and flows into spot Ether ETFs, as evidence of whether other buyers take up the slack. If ETH falls noticeably once purchases cease, that would indicate the treasury bid carried more weight than its recent scale suggested, whereas an unchanged price would be a sign the market had already adjusted. Lee has already changed his position on the cap once, so a sharp rally could put it under pressure again.