Arkham "Joseph Lubin?" Wallet Sends 110,000 ETH to Sky Vaults to Support $259M DAI Debt
A long-dormant Ethereum address tagged "Joseph Lubin?" by Arkham Intelligence moved 110,000 ETH into three Sky Finance vaults on Friday, reinforcing collateral behind $259.05 million of outstanding DAI debt as ETH sold off, according to Lookonchain.
The inflow arrived in four transfers totaling 110,001 ETH: 40,000 ETH, 40,000 ETH, 30,000 ETH, and an additional 1 ETH. The originating wallet had shown no activity for more than three years prior to Friday. ETH changed hands around $1,575 at the time of the transfers, down about 10% over the prior 24 hours.
Arkham also labels the address a "Genesis Block Address," indicating it received ETH from Ethereum's original July 2015 distribution to early contributors. Lookonchain highlighted the movement on X on June 6, initially framing it as a potential sell signal before the Sky vault destination was identified. Neither Lubin nor ConsenSys has publicly confirmed or denied ownership of the wallet.
Questions around attribution have drawn attention after a recent misfire: three days earlier, Lookonchain attributed a 20 million LDO token sale to Lido cofounder Cobie, then withdrew the claim after Cobie said the wallets belonged to Wintermute. The episode underscored that onchain labels can be inaccurate.
Onchain data show the 110,000 ETH first moved through three intermediate wallets before being posted as collateral into three separate Sky vaults (Sky is the rebrand of MakerDAO). After the deposit, the vaults hold about 412,430 WETH in collateral, valued near $677 million at an ETH price of $1,642 (CoinGecko), against the $259.05 million DAI debt balance.
The three vaults carry liquidation prices of $899, $1,020, and $1,056 per ETH. With ETH at $1,642, the position sits roughly 55% above the nearest liquidation level, a wider buffer than earlier in the week after ETH's decline.
A Sky vault functions as a collateralized debt position: a user locks ETH and mints DAI against it. If the collateral value drops below the required threshold—typically around 130% to 145% for ETH-backed vaults—the position can be automatically liquidated by keepers, who repay the debt and take a penalty. Adding collateral raises the liquidation floor and extends the position's runway during market drawdowns.
