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The Ethereum Foundation's May 2026 Protocol Cluster update confirmed that developers advanced testing and preparations for the upcoming Glamsterdam upgrade at a recent interop event in Svalbard, Norway, with several key milestones locked in.
Why it matters
Glamsterdam is the next major Ethereum network upgrade, and the Svalbard interop is one of the few in-person synchronization windows client teams get each year. Progress here is what sets the realistic activation timeline for mainnet later in 2026 — a checkpoint the wider developer community watches closely.
Market impact
The Foundation also announced a leadership transition inside the Protocol Cluster. Barnabé Monnot and Tim Beiko are leaving, Alex Stokes is taking a sabbatical, and Will Corcoran, Kev Wedderburn and Fredrik are stepping in as the new co-leads. With Beiko long viewed as the public face of EIP coordination and Monnot central to research direction, the rotation is the structural change most ecosystem participants will weigh against the technical progress in Svalbard.
Source: [Protocol Cluster Updates: May 2026 | Ethereum Foundation Blog](https://blog.ethereum.org/2026/05/11/protocol-update-may-26)
Frequently asked questions
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What is the Glamsterdam upgrade?
Glamsterdam is the next major Ethereum network upgrade currently in development, with testing and preparation work tracked through the Foundation's Protocol Cluster updates.
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Where did the recent Glamsterdam progress happen?
Developers advanced Glamsterdam testing and preparation at a recent interop event held in Svalbard, Norway, with several key milestones confirmed in the May 2026 update.
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Who is leaving the Ethereum Foundation's Protocol Cluster?
Barnabé Monnot and Tim Beiko are leaving the Ethereum Foundation, and Alex Stokes is taking a sabbatical, per the May 2026 Protocol Cluster update.
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Who are the new Protocol Cluster leads?
Will Corcoran, Kev Wedderburn and Fredrik are stepping in as the new Protocol Cluster co-leads following the announced transition.
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Why does the leadership change matter for Ethereum developers?
Tim Beiko has long served as the public face of EIP coordination and Barnabé Monnot was central to research direction, so the rotation reshapes the team's external coordination and research leadership as Glamsterdam moves toward mainnet.
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