Wire · technology
Ethereum Glamsterdam Upgrade Nears Final Development Phase
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Fusion42 · 27 September 2026 · Fusion42 review
The Ethereum Glamsterdam upgrade is entering its final development phase with a public Sepolia testnet fork scheduled for October 6, 2026, and a mainnet rollout expected in Q4 2026. The upgrade aims to increase transaction throughput via parallelism, improve node synchronization with snap v2, and enhance long-term network sustainability to combat database bloat.
This Wire brief sits within Fusion42's coverage of Crypto & Web3, and 2 sources have reported it between 17 Sep 2026 and 27 Sep 2026.
◆ ◆ The Wire takeaway
Ethereum node operators face an immediate need to prepare for snap v2 synchronization changes and increased parallel transaction processing ahead of Glamsterdam's testnet launch. If you run infrastructure dependent on Ethereum, upgrading and testing your clients now reduces risk in the narrow window before Q4 rollout.
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2 sources · first reported 17 Sep 2026 · latest 27 Sep 2026
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