Mason A. Dinehart III

Biography

Mason A. Dinehart III is a San Ramon, California-based securities expert witness who has worked through his firm FEND (Financial Education Network Development) and brings 35 years of securities-industry experience. He is the designated securities expert witness for the California State Bar. He has been accepted by both federal and California state courts as qualified to testify as a securities expert witness. He has held FINRA Series 7, 24, 27, 63, 79, and 99 licenses (CRD 68314) and previously held a California real estate salesperson license. His areas of practice include churning analysis, broker fiduciary duty, IPO evaluation, due diligence, suitability analysis, and private placement offerings. He also holds professional affiliations with IARFC, the FINRA Board of Arbitrators, the American Association of Individual Investors (AAII), and the North American Securities Administrators Association (NASAA), and uses Thomson Reuters' "Investment View" damage-calculation tool in case work.

Areas of Expertise

• Standard of Care
• Suitability
• Supervision
• Due Diligence
• Elder Abuse
• Private Placements
• Life Insurance
• Variable and Fixed Index Annuities

Practice Details

• Firm: FEND-Financial Education Network Development
• Location: San Ramon, CA
• Phone: (310) 850-2834
• Website: fend.com
• LinkedIn: Mason A. Dinehart III on LinkedIn
• Retained by: Plaintiff and defense

Credentials & Certifications

• RFC (IARFC)
• FINRA Arbitrator (since 1999)
• Has held FINRA Series 7, 24, 27, 63, 79, and 99 licenses (CRD 68314)
• Previously held a California real estate salesperson license

Fee Schedule

Related Reading

• How to Vet an Expert Witness: A Qualifications Checklist
• The 2026 Expert Witness Fee Guide

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