Ethereum’s Titan Builder Strikes $34 Million From Disaster, Overtakes Tether and Circle Overnight

Ethereum (ETH) block builder Titan Builder extracted $34 million from a single botched $50 million DeFi swap, temporarily making it the top protocol by daily revenue.

The trader attempted to swap roughly $50 million of aEthUSDT into aEthAAVE via CoW Protocol but received only about $35,000 due to extreme slippage and a sandwich attack.

Why it matters:

• Titan Builder is a neutral Ethereum block builder that specializes in processing Maximal Extractable Value (MEV) bundles for validators and searchers.
• The $34 million extraction shows MEV bots can capture nearly the full value of a poorly routed large trade
• Titan Builder briefly surpassed Tether and Circle in 24-hour revenue on DefiLlama
• The event reignites debate over whether DeFi front-ends adequately protect users from catastrophic execution failures

The details:

• Titan Builder’s bot captured $34 million in ETH and immediately transferred the full amount to Coinbase
• The trader lost over 99% of the $50 million position, receiving roughly $35,000 after the sandwich attack
• Suhail Kakar noted that “the technology works” but poor user experience can easily produce million-dollar losses
• Multiple observers questioned whether the trade could represent money laundering or capital reallocation
• Lookonchain suggests the attack victim may have been Garret Jin.

The big picture: