Hille R. Sheppard

HILLE SHEPPARD is a nationally recognized litigator and strategic advisor who represents public companies and their officers and directors in high-stakes securities, shareholder, governance, and complex commercial disputes.

Her matters often involve complex accounting, business, financial, and disclosure issues, as well as parallel investigations and regulatory scrutiny, with particular experience in the life sciences and financial services sectors. She also advises insurance companies and private equity firms regarding complex commercial disputes.

Recent representative matters include: 

• Represented a multinational life sciences company and its officers in high-profile securities litigation arising from clinical trial disclosures, securing dismissal of all claims.
• Represented a public company and its officers and directors in parallel securities and shareholder derivative matters, including related demand review committee proceedings and corporate governance issues.
• Represented a financial services company and its board in parallel securities and shareholder derivative litigation arising from anti-money laundering-related issues, securing dismissal affirmed on appeal.
• Represented a financial services company in high-profile litigation brought under the Anti-Terrorism Act.

Hille has been with Sidley for more than 30 years and previously served as co-chair of the firm’s Securities and Shareholder Litigation practice. She is ranked in Band 1 by Chambers USA for securities litigation (2021–2025) and was named a BTI Client Service All-Star MVP in 2022. She is also a long-time member of the Board of Directors of the Girl Scouts of Greater Chicago and Northwest Indiana.