Four decades of securities and M&A practice. One senior attorney on every deal.

San Diego's Securities and M&A Counsel

Big Law Experience, Boutique Rates

Nearly 50 years in securities law and mergers and acquisitions. 500+ public and private offerings as lead counsel. 200+ closed M&A transactions. AV-rated by Martindale-Hubbell — the highest peer-review rating in the legal profession. Weintraub Law Group PC brings the depth of a major firm to every engagement, without the overhead that comes with it.


We serve serial entrepreneurs, startup founders, hedge fund managers, investment advisers, broker-dealers, and lower- to mid-market business owners from our San Diego base — and nationwide for securities, M&A, and expert witness matters.

Why Founders and Attorneys Choose Weintraub Law Group

Nearly 50 years in securities and M&A practice. One senior attorney on every matter. Our work has been tested in court and regulatory proceedings — and our opinions have held.

→ Lead counsel on 500+ public and private securities offerings since 1978



→ 200+ closed M&A transactions across industries and deal structures


→ AV-rated by Martindale-Hubbell — the highest peer-review rating in the legal profession


→ Boutique rates under $1,000/hour — with a record of prevailing against Cooley, Sheppard Mullin, and Procopio

What We Handle

Weintraub Law Group concentrates in three areas where the cost of the wrong attorney is highest: capital formation, business transactions, and securities litigation support.

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Issuer-side counsel for founders, funds, and companies raising capital — including Regulation D and crowdfunding offerings. Lead counsel on 500+ public and private offerings.

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Mergers & Acquisitions

Buy-side and sell-side deal counsel for founders and mid-market companies. 200+ transactions closed.

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Securities Expert Witness

Documented expert testimony on Rule 144, Regulation D, and broker-dealer issues — for trial counsel and criminal defense attorneys nationwide.

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A Track Record That Referral Counsel Can Stand Behind

We work with transactional attorneys and litigators who need a securities specialist on a matter — not a generalist who will get up to speed at the client's expense. Our work has been tested in court and in regulatory proceedings. Our opinions have held.


Review our notable transactions and see the work for yourself.

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Why Founders and Attorneys Choose Weintraub Law Group

  • Lead counsel on 500+ public and private securities offerings since 1978


  • 200+ closed M&A transactions across industries and deal structures


  • AV-rated by Martindale-Hubbell — the highest peer-review rating available


  • Instructor of securities and tax law at UCLA, UCSD, and the University of San Diego


  • NBI continuing-legal-education presenter on securities law and M&A due diligence


  • Prevailed in matters against Cooley, Sheppard Mullin, and Procopio


  • Hourly rates under $1,000 — a fraction of what comparable Big Law experience commands


  • Provisors member for 17 years — deeply networked in the San Diego professional community


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Serving San Diego and Clients Nationwide

Our office is based in San Diego. Securities law, M&A counsel, and expert witness engagements extend to clients and matters across the country. If you are in Los Angeles or elsewhere in California, we handle those matters as well.

Frequently Asked Questions

  • What types of clients does Weintraub Law Group typically represent?

    We represent serial entrepreneurs and startup founders raising capital, lower- and mid-market business owners buying or selling companies, hedge fund managers and investment advisers, broker-dealers, and referring attorneys who need a securities specialist on a complex matter. Most clients come to us because the stakes are high enough that a generalist is not an acceptable risk.


  • Does Weintraub Law Group handle matters outside of San Diego?

    Yes. While our office is in San Diego, we handle securities law, mergers and acquisitions, and expert witness engagements on a nationwide basis. Many of our clients are based in Los Angeles, other parts of California, or out of state entirely.


  • How does a boutique firm compete with larger firms like Cooley or Sheppard Mullin?

    We have competed against those firms directly — and prevailed. The difference is that at Weintraub Law Group, Rick Weintraub is the attorney on your matter. You are not paying senior partner rates to receive associate work. That combination of direct senior involvement and lower overhead is where boutique firms consistently outperform larger ones on transactions of comparable complexity.

  • What is the AV rating from Martindale-Hubbell, and why does it matter?

    AV Preeminent is the highest peer-review rating Martindale-Hubbell awards. It reflects assessments from attorneys and judges who have direct professional experience with the rated attorney — evaluating legal ability and ethical standards. It is one of the most credible third-party signals of standing in the legal profession.

  • How do I get started?

    Call our San Diego office directly or reach out by email to schedule a consultation. We do not use web intake forms — every new matter starts with a direct conversation.