Former employee sues Ethereum Foundation and Vitalik Buterin over firing after cancer disclosure and mandate dispute
Former Protocol Support lead Kayleen Fulton has filed a federal lawsuit against the Ethereum Foundation, co-founder Vitalik Buterin, and others, alleging retaliatory termination and disability discrimination following her cancer diagnosis and opposition to an internal mandate.
Former Ethereum Foundation Protocol Support lead Kayleen Fulton has filed a lawsuit in the U.S. District Court for the District of Colorado against six defendants, including Stiftung Ethereum, affiliate Ethereum Asia Pacific Limited, former co-executive director Bastian Aue, and co-founder Vitalik Buterin. The complaint alleges Fulton was unlawfully terminated on April 6, 2026, just 13 days after she disclosed an ovarian cancer diagnosis to leadership in an email where she stated she was not seeking leave or accommodations at that time.[1][5][7]
The dispute centers on the foundation's organizational Mandate distributed to staff in February 2026. The draft contained a "Source Seppuku License" requiring adopters to pledge to "take his or her own life with a sword" if its commitments were broken. Despite 79 employees voting to remove the clause and Buterin assuring staff that significant changes were in progress, the final document published in March retained the pledge text beside cartoon artwork. Management clarified that the wording was a non-literal cultural reference and that employees were not expected to commit suicide.[1][3][6][7]
After leadership warned that refusing to affirm the Mandate would be considered a decision to leave, Fulton and colleague Trent Van Epps co-organized a protest letter signed by 53 staff members refusing to sign under those conditions while affirming support for the foundation's direction. According to the complaint, Aue dismissed Van Epps and Fulton via video calls on April 6 without providing specific performance reasons. Counsel for Ethereum Asia Pacific had previously denied in a May letter that Fulton was subjected to unlawful retaliation, economic duress, or wrongful dismissal.[4][6][7]
Key facts
- Kayleen Fulton filed a federal lawsuit on November 4, 2026, in the U.S. District Court for Colorado against Stiftung Ethereum, Ethereum Asia Pacific Limited, Lightsource HR Global, Vensure Employer Services, Bastian Aue, and Vitalik Buterin.
- Fulton alleges she was fired on April 6, 2026, 13 days after emailing leadership to disclose an ovarian cancer diagnosis.
- The lawsuit alleges retaliation after Fulton co-organized an objection letter signed by 53 employees opposing a mandatory endorsement of the foundation's Mandate document.
- The disputed Mandate draft contained a "Source Seppuku License" pledging that an adopter would "take his or her own life with a sword" upon breaching terms.
- According to the suit, 79 employees voted to remove the suicide pledge, and management later clarified the wording was not meant to be taken literally.
- Co-organizer Trent Van Epps was fired 30 minutes before Fulton on April 6, according to the complaint.
- A May 14 letter from Ethereum Asia Pacific's counsel quoted in the filing denied any unlawful conduct, duress, or retaliatory termination.
Sources · 7 sources
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SolanaFloor@SolanaFloorPost on X ·
NEW: Former Ethereum Foundation employee @nixorokish sues the foundation and @VitalikButerin, alleging she was fired after opposing a requirement to affirm a mandate containing a pledge to “take his or her own life with a sword” if its commitments were breached. Her lawsuit says 79 employees voted to remove the pledge, and she alleges she was fired after organizing staff opposition to the mandate, 13 days after disclosing a cancer diagnosis. According to the complaint, management responded to staff concerns by saying the pledge was “not meant to be taken literally” and updated the commitment form to clarify it had “nothing to do with literal seppuku.”
Open source - CB
Crypto Briefing@Crypto_BriefingPost on X ·
⚖️ NEW: Former Ethereum Foundation protocol lead Kayleen Fulton has sued the foundation and Vitalik Buterin, alleging she was fired 13 days after disclosing an ovarian cancer diagnosis. https://t.co/85iHWEkhwC
Open source - BL
BlockNews@blocknewsdotcomPost on X ·
🚨 LATEST: The Ethereum Foundation and Vitalik Buterin face a LAWSUIT from former employee "Nixo," who alleges she was fired after questioning a workplace mandate containing a "suicide pledge" and disclosing her cancer diagnosis. According to the complaint, management described the seppuku language as a CULTURAL REFERENCE and clarified that employees were not being asked to commit literal suicide.
Open source - BS
BSCN@BSCNewsPost on X ·
Vitalik Buterin And Ethereum Foundation Sued Over Shocking Firing Claims Ethereum (@ethereum) $ETH co-founder Vitalik Buterin (@VitalikButerin) and the Ethereum Foundation face a federal lawsuit from former employee Kayleen Fulton. She alleges wrongful termination after disclosing ovarian cancer and organizing opposition to an internal mandate. The disputed document reportedly included a pledge referencing suicide. Per reports, former employee Trent Van Epps along with Fulton organized a protest letter signed by 53 colleagues. They opposed a requirement to personally endorse the Foundation's internal mandate or face termination. Both were fired on April 6, according to the complaint. The lawsuit names Buterin, Ethereum Foundation entities and three other defendants. Fulton is seeking lost wages, compensatory and punitive damages, and legal fees. The allegations remain unproven.
Open source - WB
Wu Blockchain@WuBlockchainPost on X ·
Former Ethereum Foundation Official Sues EF and Vitalik Buterin, Alleging Retaliatory Firing Over Mandate Dispute According to a complaint filed in the U.S. District Court for Colorado on November 4, former Ethereum Foundation Protocol Support lead Kayleen Fulton (Nixo) sued six defendants, including Ethereum Foundation entities and co-founder Vitalik Buterin, alleging retaliatory termination and disability discrimination. Fulton claims she was fired on April 6 after disclosing an ovarian cancer diagnosis and helping organize a letter signed by 53 employees opposing mandatory endorsement of the Ethereum Foundation Mandate. The complaint also cites a recorded conversation in which Buterin allegedly expressed concern that employees could influence organizational decisions by creating controversy. The allegations have not been established in court.
Open source - CB
Coin Bureau@coinbureauPost on X ·
🚨ALARMING: The Ethereum Foundation was sued after firing staff lead who opposed a “suicide pledge”. Former Protocol Support lead Kayleen Fulton is suing the Ethereum Foundation, Vitalik Buterin and others, alleging disability discrimination and retaliation, per Protos. - Fulton says she was fired on April 6, 13 days after disclosing her ovarian cancer diagnosis and 12 days after organizing a letter opposing the mandate. - The mandate included a license that called on those bound by it “to take his or her own life with a sword” if they broke its terms or changed or removed any part of the license. - The complaint says 79 employees voted to remove the pledge and Buterin promised “significant changes.” - The foundation published the mandate with the pledge intact and recorded it on Ethereum. - The complaint says staff were told that refusing to affirm the mandate would be treated as resignation. - 53 staff members signed a letter refusing to affirm it and saying they hadn’t resigned. - The lawsuit alleges both organizers, Fulton and Trent Van Epps, were fired on April 6. The allegations remain UNPROVEN in court. The foundation did not immediately respond to Protos’ request for comment.
Open source - UN
UnchainedArticle ·
Fired Employee Sues the Ethereum Foundation and Vitalik Buterin Kayleen Fulton , who headed the Ethereum Foundation (EF) Protocol Support team and facilitated Ethereum’s All Core Developers calls, says in a federal lawsuit that the EF fired her 13 days after she emailed leadership about her ovarian cancer diagnosis. The complaint, filed Nov. 4 in U.S. District Court in Colorado, names six defendants: Stiftung Ethereum, the Swiss foundation that operates as the EF; Ethereum Asia Pacific Limited, the Singapore-based EF affiliate on whose behalf she was hired; Lightsource HR Global and Vensure Employer Services, two firms that handled her hiring, payroll and benefits; Bastian Aue , then the EF’s co-executive director; and Vitalik Buterin . Buterin, a Stiftung Ethereum board member sued in his individual capacity, is a defendant in five of the 11 claims , by Unchained’s count. Get Unchained’s crypto news in your inbox with the free Unchained Daily newsletter . The Mandate Pledge The suit centers on the EF’s Mandate, a statement of direction sent to all staff on Feb. 25. That draft carried a “Source Seppuku License” whose author, editors and distributors pledged to “take his or her own life with a sword” if they broke or altered it, the complaint says. When staff were later told to sign a commitment form, one employee asked whether signing bound him to the pledge literally. Aue replied that the pledge was “chosen deliberately, but not meant to be taken literally,” and management “updated the form to specify that the commitment has nothing to do with literal seppuku,” according to the suit. After a March 2 proposal to remove the clause, 79 employees backed it, the complaint alleges. On March 5, Buterin told staff the document was “continuing to be worked on with significant changes especially to the areas where people have expressed the most concern or confusion,” according to the complaint. The final version, published March 13, kept the pledge text as a small image, the suit says. The copy posted on the EF’s website, checked by Unchained on Nov. 9, has no searchable instance of “seppuku,” though a cartoon on page 11 of the “Source Seppuku License,” includes two pledges and the cartoon cat’s speech bubble reads, “May the Foundation fall on its own sword if it fails to uphold its solemn promise to Ethereum.” Disclosure, Letter and Firing On March 20, Aue required staff to commit to the Mandate by form and warned in an announcement that “non-submission will be interpreted as a decision to leave,” per the complaint. Fulton, diagnosed on March 19, disclosed the diagnosis in a March 24 email, writing that “at this time” she was “not requesting leave or accommodation.” The next day she sent a letter, ultimately signed by 53 Protocol group members , saying they backed the Mandate’s direction “but cannot in good faith affirm under these conditions,” the complaint says. Aue fired her by video call on April 6 , saying he had lost confidence in her but giving no reason, the suit alleges. Trent Van Epps, the letter’s other organizer, was fired 30 minutes earlier, according to the complaint. The claims include disability discrimination and retaliation under federal and Colorado law, medical-leave interference and retaliation, and a Colorado aiding-and-abetting claim against Aue and Buterin. Fulton seeks back and front pay plus compensatory and punitive damages, with no dollar figure. As of Nov. 9, the docket showed no filings after Nov. 4, and the EF, Aue and Buterin had not responded publicly. In a May 14 letter quoted in the complaint, Ethereum Asia Pacific’s counsel denied that Fulton “was subjected to unlawful conduct, economic duress, retaliation,” or “termination in violation of public policy.” The foundation laid off 54 employees in June, days after Hsiao-Wei Wang stepped down as co-executive director. Related Listen: Why Ethereum Missionaries Are Leaving the EF: ‘Their Hopes Were Crushed’ The post Fired Employee Sues the Ethereum Foundation and Vitalik Buterin appeared first on Unchained .
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