Sebastian Alsheimer Discusses New SEC Guidance on Activist Sidecar Disclosures in Bloomberg

July 22, 2026

Cleary Gottlieb partner and Head of Shareholder Engagement and Activism Defense Sebastian Alsheimer spoke with Bloomberg on “Activists Dealt Disclosure Blow by SEC Over Investors Backing Campaigns.”

Sebastian spoke on the significance of new SEC guidance targeting activist “sidecar” vehicles in 13D disclosures, noting that it “will primarily complicate campaigns run by smaller funds who rely more on SPVs than the big established activist funds.”

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Sebastian Alsheimer Discusses New SEC Guidance on Activist Sidecar Disclosures in Bloomberg