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William E. Havemann
Role: Attorney representing Kalshi in Fourth Circuit appeal
Affiliation: Unknown (likely major law firm)
Timeline
- 2026-05-07 — Argued for Kalshi before Fourth Circuit in KalshiEX LLC v. Martin, No. 25-1892 (14 minutes + 6 minute rebuttal)
Notes
Havemann served as arguing counsel for Kalshi in the Fourth Circuit Maryland preemption case. Session 38 identified Neal Katyal as counsel, suggesting Katyal may be lead counsel while Havemann handles oral argument.