New York attorney · Reg. #6150528

Isabelle Katharina De Lange

Registered — renewal due (registry: Due to reregister within 30 days of birthday)

Current employer

Sullivan & Cromwell LLP · New York, NY · since at least September 2026

Admission

Admitted 2024, First Department · European University Viadrina, Frankfurt (Oder), Germany

Employment history

• Sullivan & Cromwell LLP · New York, NY · current

Compiled from NYS Office of Court Administration registration records, published NY Appellate Division decisions, and SEC orders against attorneys; current as of October 2026. Not an official record; verify with the NY Courts Attorney Search.