Steve Tonsfeldt


I work with companies on high-stakes, game-changing deals.

Steven Tonsfeldt represents public and private companies in domestic and cross-border M&A transactions, contested transactions, hostile takeovers and defense planning. He also advises private investors and their portfolio companies on investment and acquisition transactions, and financial advisors working with companies engaged in transactional matters.

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  • Byju’s Agrees to Acquire Tynker to Continue US Expansion 

  • Genome Medical Closes $60 Million Series C Financing and Acquires GeneMatters 

  • Intersect ENT Agrees to Sell to Medtronic for More Than $1 Billion 

  • Kredivo Agrees to SPAC Merger With VPC Impact Acquisition Holdings II 

  • India-Based Edtech Company Byju’s Acquires Epic 

  • View all


  • University of California, Berkeley

  • University of Iowa
    BBA, Accounting
    with highest distinction

Admissions & Credentials



  • Berkeley Center for Law, Business and the Economy - Advisory Board

  • Certified Public Accountant

Rankings & Accolades

    Lawdragon: 500 Leading Dealmakers in America (2021)

    Who's Who Legal: Thought Leaders – M&A and Governance (2021)

    Chambers USA: Corporate/M&A – Northern California (2002-2021)

    IFLR1000: Highly Regarded – Private Equity, M&A (California) (2020)

    American Lawyer: Dealmaker of the Week

    Best Lawyers in America: Mergers & Acquisitions (2006 – 2021)

    Legal 500: M&A (Large Deals) (2021)