BitMine Immersion Technologies has filed with the SEC to sell $300 million in preferred stock, with the proceeds earmarked for one thing: buying Ethereum and staking it. The miner wants to issue 3 million shares of Series A Perpetual Preferred Stock at $100 each, paying a 9.5% cumulative annual dividend. That structure mirrors the one Bitcoin treasury firm Strategy uses — but BitMine is betting on ETH staking yields to help cover the payout.
How the offering works
The preferred shares carry a fixed 9.5% annual dividend, paid in cash or kind. BitMine says it will use the cash to acquire Ethereum, expand its own staking infrastructure through a proprietary initiative called MAVAN, and invest in the broader ETH ecosystem. Chairman Thomas Lee argued recently at the Proof of Talk conference that Ethereum treasuries could use staking yields to fund ecosystem grants — a use case Bitcoin can't touch because it doesn't stake.
The staking math problem
There's an obvious gap. ETH staking yields currently run between 3% and 5% annualized. The preferred dividend is 9.5%. So the staking income alone won't cover the dividend — not unless BitMine keeps accumulating more ETH or finds other revenue. This is the same bind Strategy ran into earlier this year when it sold 32 BTC to fund its 11.5% STRC preferred dividend, briefly pushing Bitcoin below $62,000. Standard Chartered's head of digital assets research, Geoffrey Kendrick, argued that ETH treasury firms could actually outperform Bitcoin equivalents because staking revenue reduces the need for forced coin sales. But the math still doesn't pencil out on day one.
Concentration concerns
BitMine has publicly said it wants to control about 5% of Ethereum's total circulating supply. That's a lot of ETH in one corporate wallet. Analysts flagged that a single holder that size becomes a key variable in ETH price dynamics — it amplifies movement in both directions on mark-to-market. Matt Hougan put it simply: the treasury bet is fine as long as management doesn't run it to infinity. The risk is real, even if the thesis holds.
What comes next
The filing is out there, but the SEC has to sign off before BitMine can start selling shares. Given the regulator's recent posture toward crypto-linked securities, that review could take months. In the meantime, BitMine will need to convince investors that 9.5% is sustainable — or that the ETH appreciation alone makes it worth the spread.
