Atty. Michael G. Tannenbaum
Recognized as one of the top lawyers in the investment management field, Michael Tannenbaum is a multi-faceted business lawyer who advises on: Transactions: Private equity and portfolio M&A Emerging ideas: Venture capital, early stage angel investing and later round financing Investments: Hedge fund, private fund and individual managed accounts Regulatory: SEC and NFA, FINRA, cross-border compliance Wealth management: Family offices, charitable foundations and endowments assistance, governance, investment due diligence, co-investment rights and side letter negotiation US legal: US side of comp
Profile Summary
About Michael G. Tannenbaum at a glance
Michael G. Tannenbaum is an attorney based in New York, New York, practicing at Tannenbaum Helpern. Admitted to practice in New York, New York State Bar Association. Educated at New York Law School (LLM, 1970) and New York Law School (JD, 1970). Recognitions include Best Lawyers in America — Private Funds / Hedge Funds Law (2026), Best Lawyers in America — Additional Areas of Practice: (2026), and Best Lawyers in America — Derivatives and Futures Law (2026). Serands clients in New York, NY and the surrounding metropolitan area.
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About
Recognized as one of the top lawyers in the investment management field, Michael Tannenbaum is a multi-faceted business lawyer who advises on:
- Transactions: Private equity and portfolio M&A
- Emerging ideas: Venture capital, early stage angel investing and later round financing
- Investments: Hedge fund, private fund and individual managed accounts
- Regulatory: SEC and NFA, FINRA, cross-border compliance
- Wealth management: Family offices, charitable foundations and endowments assistance, governance, investment due diligence, co-investment rights and side letter negotiation
- US legal: US side of complex cross border matters
- Dispute resolution: Arbitration and mediation
Michael brings 40 years of experience to each matter. A portion of his work is cross-border, inbound US work from non-US sources such as non-US firms that need US advice for their clients, where we serve as the “US Office” for non-US firms. Another portion of Michael’s work is providing legal guidance to family office and ultra-high-net-worth individuals with regard to their investments. This includes red flag document reviews, due diligence, formation of blockers and side letter and co-investment right negotiation.
Outside of work, Michael founded and is president of Partners in Hearing, Inc., an IRS 501c3 public charity whose mission is to assist children with cochlear implants who are profoundly deaf get the supplemental care they need to be successful in the mainstream. For his pastime, Michael collects Marklin electric trains (HO scale), is sporadically working towards a certificate in horticulture at the NY Botanical Gardens.
Recent experience:- Advised a large non US based family office located in Geneva and Singapore with its investment into a US-based technology company in Boston, successfully negotiated complex shareholders rights and various ancillary agreements, with a focus on anti-dilution.
- Conducted due diligence review of several private equity and venture investments which led to creating efficient tax blockers, negotiating co-investment rights and side letters that were crucial to the investor.
- Assisted in a complex JAMS mediation and arbitration with regard to placement agent fees allegedly due from a multi-billion dollar investment manager as a result of a successful capital raise.
- Advised a promising tech start up platform on its angel financing and Series A round financing, including details convertible preferred and warrant term sheet negotiation, document preparation and related advice.
- Assisted in the formation of cross-border private equity platform, private placement memo and related offering materials, addressing SEC issues and the like.
- Assisted in a complex and aggressive SEC investigation into the activities of a registered investment manager.
- Served as Chair of arbitration panel with regard to a complex commodities and futures dispute among numerous NFA members.
- Serve as Co-Trustee of a substantial trust established to benefit the needs of a family with a special needs child.
Jurisdictional Context
Why local counsel matters in New York
Practicing law in New York. Legal matters in New York are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in New York are typically filed in the local municipal court or the appropriate New York state district court, depending on subject matter and amount in controversy. An attorney licensed in New York brings working knowledge of local procedural deadlines, judicial practices in this andnue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in New York courts without local counsel or pro hac vice admission.
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