About Harlow & Associates

A Quarter Century of Uncompromising Advocacy

Founded in 1999 by William Harlow, a former federal prosecutor with an unbroken record of landmark victories, Harlow & Associates was built on a singular premise: that exceptional clients deserve exceptional counsel.

From our flagship offices at One World Trade Center, we have grown to become one of the most respected boutique law firms in the nation — not through volume, but through the relentless pursuit of optimal outcomes for every client we serve.

We deliberately limit our caseload to ensure that every matter receives the full weight of our intellectual resources. When you retain Harlow & Associates, you gain the focused attention of our senior partners, not a team of junior associates.

Integrity Above All

Our reputation is our most valuable asset. We operate with absolute transparency and ethical rigor in every matter we undertake.

Excellence as a Standard

We do not accept mediocrity. Every brief, every argument, every negotiation reflects our commitment to the highest standard of legal craft.

Continuous Mastery

The law evolves. Our attorneys are scholars as much as practitioners, constantly advancing their expertise to serve clients at the frontier of legal development.

Our Attorneys

William J. Harlow

William founded the firm after a distinguished career as a federal prosecutor. He has tried over 200 cases to verdict and negotiated transactions exceeding $5 billion in aggregate value.

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Corporate Litigation & M&A

William J. Harlow

Founding Partner

  • Harvard Law School, J.D.
  • Former Federal Prosecutor, SDNY
  • Super Lawyers® Top 100
  • 25+ Years Experience
Catherine M. Reyes

Catherine leads our wealth management practice, advising ultra-high-net-worth families on complex multi-generational estate planning, charitable giving strategies, and family governance.

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Estate Planning & Wealth Management

Catherine M. Reyes

Senior Partner

  • Yale Law School, J.D.
  • LL.M. in Taxation, NYU
  • Fellow, American College of Trust and Estate Counsel
  • 18 Years Experience
Marcus A. Thornton

Marcus advises public and private companies on securities offerings, corporate governance, and strategic transactions. His practice spans from early-stage venture financing to complex public company M&A.

LinkedIn Profile
Corporate Law & Securities

Marcus A. Thornton

Partner

  • Columbia Law School, J.D.
  • Former Associate, Sullivan & Cromwell
  • Chambers USA Ranked
  • 12 Years Experience

Ready to Work With Us?

Schedule a confidential consultation with one of our senior partners today.