Core Members of Ethereum Foundation Stage Mass Exodus: 'Decentralization' or 'Dissolution'?

marsbitPublished on 2026-05-20Last updated on 2026-05-20

Abstract

In April-May 2026, at least six core members, including key engineers and researchers, departed from the Ethereum Foundation (EF). This followed the earlier exit of co-executive director Tomasz Stańczak. High-profile leavers included long-time contributors from the Protocol Cluster and the "Trillion Dollar Security Initiative." EF framed the departures as part of its "Mandate" restructuring aimed at reducing its central role. However, community concerns grew as core developer numbers fell from 225 in May 2025 to 169 in May 2026, though a recent one-month rebound of 63% was noted. ETH holdings in the EF treasury also decreased. Despite the leadership flux, Ethereum's overall developer activity remains substantial, with nearly 10,000 active ecosystem developers. The departures have sparked discussions about EF's future direction, coordination, and the practical meaning of decentralization for Ethereum, which faces challenges like price declines and project security concerns while aspiring to be a global financial infrastructure layer.

Author: Hristina Vasileva

Compiled by: Deep Tide TechFlow

Deep Tide Intro: During April and May 2026, at least six core members of the Ethereum Foundation (EF) left in rapid succession, spanning protocol engineering, cryptoeconomics research, and management. EF officially frames this within its "Mandate" framework as active downsizing, but the community sees: core developers dropping from 225 to 169, shrinking ETH holdings, and the Glamsterdam upgrade delayed. This Cryptopolitan report details the list of departures, the logic behind EF's restructuring, and the current state of ecosystem developers.

The Ethereum Foundation (EF) has lost several key contributors, sparking renewed questions about the organization's direction and Ethereum's future. This wave of departures follows Tomasz Stańczak's resignation as EF co-Executive Director after just one year in the role.

In April and May, a total of six contributors left or began long-term leave. Departures were concentrated in the foundation's core engineering teams and research department.

Some of the engineers were from the Protocol Cluster responsible for Ethereum's L1 design. This unit underwent restructuring, with engineers Barnabé Monnot and Tim Beiko departing subsequently.

Earlier, Josh Stark announced his departure after seven years at EF, where he served as co-chair of the 'Trillion Dollar Security Initiative.' Trent Van Epps left after five years, having been involved with organizing the Protocol Guild; he will continue contributing to the broader ecosystem part-time.

May Exodus Intensifies

The most recent to leave EF is Carl Beek, a seven-year veteran and a key figure in the Beacon Chain launch phase.

Julian Ma also recently resigned after four years of cryptoeconomics research at EF, focusing on mechanism design.

These two departures sparked greater concern within the Ethereum community, escalating discussions about EF's future direction. The foundation's own public statements have consistently focused on "supporting the ecosystem as a whole," deliberately downplaying its role as a central authority.

The departure of core members doesn't directly indicate problems with Ethereum itself. However, these exits have indeed reignited discussions about leadership, coordination mechanisms, and what the goal of "decentralization" actually entails.

Developer Activity Maintains a Baseline

Despite the high-level personnel turbulence, Ethereum's developer activity retains a solid baseline. Token Terminal data shows the project currently has 169 core developers, a 63% rebound over the past month. However, looking at a longer timeframe, core developers have declined from 225 in May 2025 to 169 as of May 19, 2026.

Caption: Ethereum core developers saw a slight uptick over the past month, but have declined from 225 in May 2025 to 169.

Source: Token Terminal

The overall number of ecosystem developers now lags behind Solana. However, according to Chainspect data, the Ethereum ecosystem still boasts 9,744 active developers.

EF is proceeding with a restructuring guided by its newly released Mandate document, adjusting its development focus. One of the Mandate's core objectives is to reduce the foundation's direct influence, which inherently involves parting ways with some key contributors.

Another practical issue facing EF is the shrinking ETH reserves in its organizational wallet. The foundation currently holds 103,660 ETH, having previously staked a portion and sold some reserves to BitMine.

The timing of this exodus is not ideal: Ethereum is being looked to as a critical infrastructure layer for global finance. The team restructuring also coincides with a peak period of concentrated attacks against decentralized projects, with the Ethereum ecosystem bearing the brunt.

Following these reports, ETH price continues to hover in a low range, down 40% over the past year. At the time of writing, ETH is trading at $2,117.02, despite the amount staked in the Beacon Chain contract reaching 31% of the circulating supply.

Related Questions

QAccording to the article, what is the primary reason the Ethereum Foundation (EF) gives for the recent wave of key member departures?

AThe EF officially attributes the departures to an active organizational downsizing under its new 'Mandate' framework, which aims to reduce the foundation's direct influence and decentralize its role.

QHow has the number of Ethereum core developers changed between May 2025 and May 2026, as mentioned in the report?

AThe number of Ethereum core developers declined from 225 in May 2025 to 169 by May 19, 2026, though it saw a 63% increase in the month preceding the report.

QWhich two recently departed EF members were highlighted as being key figures in the Beacon Chain's launch and cryptoeconomics research?

ACarl Beek, a key figure in the Beacon Chain launch, and Julian Ma, who focused on cryptoeconomics and mechanism design research.

QWhat financial pressure does the Ethereum Foundation face, as indicated in the article?

AThe EF faces financial pressure from its shrinking ETH treasury reserves, which now hold 103,660 ETH after using some for staking and selling a portion to BitMine.

QWhat broader community concern is sparked by the departures of EF core members, beyond the organizational changes themselves?

AThe departures have sparked discussions about leadership, coordination mechanisms, and the practical meaning and implications of Ethereum's 'decentralization' goal.

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