The Ethereum Foundation (EF) has lost at least eight senior contributors in 2026, with five departures concentrated in May alone. The exits include protocol cluster leaders Tim Beiko and Barnabé Monnot, former co-executive director Tomasz Stańczak, and long-standing researchers Carl Beekhuizen an...
"The EF is choosing to use its remaining resources to pursue longevity over breadth. Yes, this means we sell less ETH." — Vitalik Buterin, Ethereum Co-Founder
The Ethereum Foundation (EF) has lost at least eight senior contributors in 2026, with five departures concentrated in May alone. The exits include protocol cluster leaders Tim Beiko and Barnabé Monnot, former co-executive director Tomasz Stańczak, and long-standing researchers Carl Beekhuizen and Julian Ma. No departing contributor has publicly cited the foundation's new organizational mandate as a reason for leaving. Stated reasons range from family obligations to sabbaticals to discomfort with cultural shifts.
The turnover coincides with three structural changes inside the EF: a 38-page organizational mandate published March 13 that narrows the foundation's mission to four non-negotiable properties (censorship resistance, openness, privacy, security — abbreviated CROPS); a treasury policy that caps annual spending at 15% of assets and glides to 5% by 2030; and the staking of 70,000 ETH ($143 million) to generate yield rather than liquidating reserves. Meanwhile, the Glamsterdam hard fork — originally targeted for H1 2026 — has slipped to Q3 as enshrined Proposer-Builder Separation (ePBS) proves more complex than anticipated. ETH trades at approximately $1,874 as of June 3, 2026, down roughly 62% from its August 2025 peak near $5,000.
The Ethereum Foundation disclosed in a May 11 blog post that Barnabé Monnot and Tim Beiko were departing the Protocol Cluster, and that Alex Stokes was taking a sabbatical. Within days, protocol researchers Carl Beekhuizen and Julian Ma announced their resignations, followed by senior solutions architect Pablo Voorvaart.
The full 2026 departure list, according to multiple sources:
| Name | Role | Departure Timeline | |------|------|-------------------| | Tomasz Stańczak | Co-Executive Director | February 2026 | | Josh Stark | Operations/Writing Lead | March 2026 (after 7 years) | | Trent Van Epps | Protocol Contributor | May 2026 | | Barnabé Monnot | Protocol Cluster Lead | May 2026 | | Tim Beiko | Protocol Cluster Lead | May 2026 | | Alex Stokes | Protocol Contributor | May 2026 (sabbatical) | | Carl Beekhuizen | Protocol Researcher | May 2026 | | Julian Ma | Protocol Researcher | May 2026 |
According to CoinDesk, no departing contributor has publicly cited the CROPS mandate as a cause. Van Epps referenced "discomfort with specific cultural choices." Others cited personal reasons including family time and interest in product-centric roles outside the foundation.
The cumulative effect is material. Beiko and Monnot ran cross-team coordination calls and maintained relationships across Ethereum's client teams. According to Phemex research, losing nine Protocol Cluster contributors "creates real friction" for the EF's coordination function. No single departure breaks the network, but the concentration of exits in a single month raises questions about institutional continuity.
Interim co-executive director Bastian Aue, who replaced Stańczak in February, is overseeing the transition. The EF has not announced replacement hires for the departed researchers.
On March 13, 2026, the Ethereum Foundation published a 38-page document titled "The Promise of Ethereum: Introducing the EF Mandate." According to the foundation's blog, the document serves as "part constitution, part manifesto, and part guide," articulating the principles that will govern EF decision-making going forward.
The mandate centers on four non-negotiable properties — CROPS:
According to the mandate, these four properties "must remain, as an indivisible whole, the sine qua non of all Ethereum's development priorities." In practical terms, CROPS functions as a filter. Proposals that trade privacy or decentralization for convenience face a higher approval bar.
The mandate also formalizes the EF's planned self-reduction. Per CoinDesk's coverage, the foundation "aims to reduce its influence as the ecosystem matures, and will measure its own long-term success by how unnecessary it becomes." Buterin reinforced this in a May 25 post on X, stating his own influence within the organization "will continue to shrink, which is honestly what I want."
The document has drawn mixed reactions. Supporters view it as a necessary philosophical anchor that prevents mission drift. Critics argue it is too abstract to guide operational decisions and that the timing — coinciding with mass departures — signals internal friction rather than coherent strategy.
The EF's financial restructuring is the most quantifiable dimension of its transformation. According to the foundation's treasury policy published in June 2025 and updated in 2026, the framework includes three components:
Spending Cap Glide Path. Annual spending is initially capped at 15% of total treasury assets, declining to 5% by 2030 — a 67% reduction in the spending ratio over five years. The EF reported approximately $100 million in annual operating expenses as of late 2025. At 15% of a $970 million treasury (as reported October 31, 2025), the cap allows approximately $145 million. At 5%, it drops to roughly $48 million — requiring either significant cost cuts or asset appreciation.
2.5-Year Operating Buffer. The policy mandates maintaining cash reserves equivalent to 2.5 years of projected expenses (approximately $250 million at current run rates). ETH-to-cash conversions are triggered automatically when cash reserves fall below this threshold.
Staking Pivot. The EF staked 70,000 ETH ($143 million at time of deposit) by April 2026, generating an estimated $3.9 million to $5.4 million in annual staking yield. On April 3, the foundation deposited $93 million in a single day to reach its staking target, according to CoinDesk.
The staking yield covers roughly 4-5% of the EF's $100 million annual budget. The remainder still requires either ETH sales or non-crypto reserves. As of October 2025, the treasury comprised $788.7 million in crypto assets (81% ETH) and $181.5 million in non-crypto holdings.
The shift matters for ETH markets. The EF was previously a periodic net seller, creating predictable downward pressure. In one notable transaction, the foundation sold 5,000 ETH for 11 million DAI. The new policy aims to reduce the frequency and size of such sales.
Glamsterdam is Ethereum's next scheduled hard fork, combining execution-layer and consensus-layer upgrades. The original target was H1 2026, with June referenced as an aspirational date in community documentation. That timeline has slipped.
According to multiple developer sources, the delay centers on enshrined Proposer-Builder Separation (ePBS). The feature splits block production into two distinct parties acting in sequence inside the consensus mechanism. Every layer of the protocol stack must handle "partial blocks" and two-party coordination failure modes — a technical challenge that has proven more complex than initial estimates.
Additional factors contributing to the delay:
According to Figment's institutional staking analysis, Glamsterdam's key objectives include scaling Layer 1 execution, improving block production, and enabling parallel transaction processing. For institutional stakers, the upgrade would also modify validator economics.
The current realistic timeline, according to developer commentary after the Interop conference, places mainnet deployment in Q3 2026. Developers have stated that "hitting the date is secondary to getting the upgrade right."
ETH's price trajectory provides the backdrop for the foundation's restructuring. Key data points:
According to Fortune, ETH fell $103.90 in a single day on June 2-3. Bitcoin simultaneously dropped below $70,000 in a broader market selloff.
On-chain data shows large-holder accumulation despite the price decline. Wallets holding at least 100,000 ETH now control approximately 22.03% of the total supply — the highest level in 10 weeks, according to market data aggregators. Bitmine, chaired by Fundstrat's Tom Lee, holds approximately 5.4 million ETH (4.47% of circulating supply) after purchasing 111,942 ETH.
Standard Chartered has maintained a $4,000 year-end 2026 target for ETH. That forecast requires a 113% recovery from current levels — a gap that reflects the uncertainty surrounding Ethereum's execution timeline and institutional confidence.
Eight senior EF contributors have departed in 2026, with five exits in May alone. The Protocol Cluster — responsible for cross-team coordination on upgrades — has been disproportionately affected.
The CROPS mandate narrows the EF's mission to four properties: censorship resistance, openness, privacy, security. The foundation explicitly aims to become less necessary over time.
Treasury policy caps spending at 15% of assets, declining to 5% by 2030. The EF has staked 70,000 ETH ($143M) for yield but this covers only ~5% of the annual $100M operating budget.
Glamsterdam has slipped from H1 to Q3 2026 as ePBS implementation complexity exceeds initial estimates and key coordinators have left.
ETH trades at $1,874, down 62% from its August 2025 peak. Large holders are accumulating, but the price reflects broader market risk-off conditions and Ethereum-specific uncertainty.
The EF's restructuring is a deliberate bet on sustainability over scale. Whether that trade-off preserves or undermines Ethereum's competitive position against faster-moving L1 competitors remains an open question.
The Ethereum Foundation is executing a transition from a broad-mandate research organization to a narrowly focused stewardship entity. The CROPS mandate, treasury glide path, and staking pivot are structurally coherent — they reduce the foundation's footprint and market impact while establishing a sustainability framework that could extend its operational life by decades.
The risk lies in timing. Eight senior departures, a slipping hard fork, and a 62% price decline create a feedback loop that could accelerate talent attrition. The Protocol Cluster exits remove exactly the coordination capacity needed to deliver Glamsterdam on revised timelines. The foundation has not disclosed whether it is hiring replacements or expects the community to absorb these functions.
The economic question is whether Ethereum's network effects and developer ecosystem are robust enough to survive a foundation that is intentionally shrinking. Buterin's framing — "a smaller ship, a more opinionated one, a longer-lasting one" — is a bet that the protocol layer is mature enough to not need the EF's previous level of intervention. That hypothesis is now being tested under adverse market conditions.