Diana M. Hastings

Partner | San Francisco, New York

Diana is a partner in the private client and tax team.

She focuses on domestic and cross-border estate, tax and business succession planning, estate and trust administration and wealth preservation.

Secretary Pamela Moran


She has an international focus, and a highly regarded and established practice.

Chambers HNW 2018, Northern California

She’s a smart lawyer – she’s very good at what she does.

Chambers HNW 2018, Northern California





State of New York, 1987

State of California, 1988

__ INSIGHT: New Tax Law Puts Foreign Trusts in a Different Realm for Estate Planners’, Bloomberg BNA Daily Tax Report - May 2018, co-author

‘Caught in a Trap [Estate of Charania 133 T.C. No. 7, September 14, 2009]’, The STEP Journal (Vol 18. Issue 1, January 2010), with Christopher S. Armstrong

STEP San Francisco Board of Directors

Real Property, Trust & Probate Section, American Bar Association

San Francisco Estate Planning Council

International Fiscal Association, USA Branch

Former Member of and Advisor to the Executive Committee, Estate Planning, Trust & Probate Section, State Bar of California

Past Chair, Probate and Trust Section, Bar Association of San Francisco

‘Decanting Trusts: Possibilities, Pitfalls, Tax Consequences, and Fiduciary Duties,’ ALI/CLE - Webcast (March 13, 2019)

‘Leaving a Global Legacy: New Structuring Considerations for Non-US Persons with US Assets’, sponsored by STEP-San Francisco (April 26, 2018)

‘Cross-Border Issues with Family Law’, Sand Hill Global Advisors 11th Annual Attorneys’ Roundtable (March 16, 2017)



  • English





San Francisco

505 Sansome Street,

2nd Floor,

CA 94111

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New York

430 Park Avenue,

10th Floor,

NY 10022-3505

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