Ethereum’s Pectra upgrade has been activated on Arbitrum through the deployment of ArbOS 40, marking a major milestone in extending Ethereum’s protocol advancements to its leading Layer-2 network

Event date

June 18, 2025

Quotes that support claims

Arbitrum has integrated the Ethereum Pectra Upgrade through its latest ArbOS 40 “Callisto” deployment. This major enhancement is now active on Arbitrum One and Nova.

In a fresh milestone, Pectra has been activated on Arbitrum, Ethereum’s leading layer-2 network.

Tags

Week 25 of 2025