Bitmine Immersion Technologies (BMNR), the largest corporate holder of Ethereum, initiated its first staking operation by depositing 74,880 ETH into the Ethereum Proof-of-Stake (PoS) network. This initial stake is valued at approximately $219 million.

BMNR holds over 4 million ETH in its treasury. This deposit represents a strategic move designed to generate interest income from these substantial holdings. The company previously outlined this plan under its 'Made in America Validator Network' (MAVAN) initiative, which launches in early 2026.

Based on a 3.12% APY, the initial stake could yield about 2,336 ETH annually. BMNR’s total treasury holds 4.066 million ETH. If the company stakes its entire treasury, it could generate around 126,800 ETH in annual rewards, equating to approximately $371 million at current prices.