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Leech Tishman: Legal Services
  • Careers
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  • Contact
  • Why LT
    • About Us
    • Leadership
    • Life at LT
    • Careers
  • People
  • Capabilities
    • Practice Groups
      • Business Restructuring & Insolvency
        • Business Restructuring & Insolvency Overview
        • Bankruptcy Chapters 7 and 13 Debtor
        • Bankruptcy Chapter 11 Debtor
        • Bankruptcy Chapter 11 Subchapter V Debtor
        • Business Wind Down and Liquidation
        • Court Appointed Trustees and Receivers
        • Creditors’ Rights
        • Official Committee of Unsecured Creditors in Chapter 11 Bankruptcy Proceedings
        • Prosecution and Defense of Avoidance Actions in Bankruptcy
        • Real Estate-Related Insolvency
      • Construction
      • Corporate
        • Corporate Overview
        • Asset Protection
        • Business Succession
        • Capital Markets
        • Commercial Contracts
        • Construction
        • Corporate Compliance & Ethics Program
        • Corporate Governance
        • Data Privacy & Cybersecurity
        • General Counsel
        • Government Relations
        • Investment Advisory
        • Lending
        • Mergers & Acquisitions
        • Nonprofits & Tax-Exempt Organizations
        • Secured Transactions
        • Securities
        • Software Development and Licensing
        • Start-Up Services
        • Tax
        • Women/Minority-Owned Businesses
      • Healthcare
        • Healthcare Overview
        • Healthcare Litigation
        • Healthcare Regulatory Compliance
        • Healthcare Corporate Transactions
        • Healthcare Government Investigations
      • Intellectual Property
        • Intellectual Property Overview
        • Copyright Protection
        • Litigation – Copyright
        • Litigation – Patent
        • Litigation – Trademark
        • Patent Preparation and Prosecution
        • Patent Validity, Infringement and Freedom to Operate Opinions
        • Trade Secret
        • Technology Agreements and Transactions
        • Trademark Clearance, Preparation, Prosecution and Maintenance
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        • Labor & Employment Overview
        • Discrimination, Sexual Harassment and Employment Litigation
        • Employment Policies & Prevention
        • ERISA, Employee Benefits & Executive Compensation
        • Immigration
        • Public Sector Employment
        • Restrictive Covenants / Non-Competes
        • Traditional Labor Law
        • Wage and Hour
        • Workplace Investigations
        • Workplace Privacy
        • Workplace Safety/OSHA
      • Litigation
        • Litigation Overview
        • ADA Title III Defense Litigation
        • Alternative Dispute Resolution
        • Appellate
        • Commercial Litigation
        • Construction Litigation
        • Defamation: Libel, Slander, and Commercial Disparagement
        • E-Discovery
        • Election Law
        • Family Law and Matrimonial Law
        • Government & Internal Investigations
        • Insurance Coverage
        • Trusts & Estates Litigation
        • Product Liability Defense
        • Real Estate Litigation
        • Restrictive Covenants / Non-Competes
        • Shareholder / Equity Disputes
        • White Collar Defense
      • Real Estate
        • Real Estate Overview
        • Assessments and Appeals
        • Development
        • Environmental
        • Franchise Development & Leasing
        • Landlord/Tenant Law
        • Leasing
        • New York Co-Ops and Condominiums (Closing Capabilities)
        • Oil & Gas
        • Permitting and Zoning
        • Real Estate Litigation
        • Real Estate-Related Insolvency
        • Transactional Commercial
        • Transactional Residential
        • Leech Tishman Closings
      • Tax
      • Trusts & Estates
        • Trusts & Estates Overview
        • Asset Protection
        • Basic & Complex Estate Planning
        • Charitable Planning & Giving
        • Federal Estate, Gift, and Fiduciary Taxation and Compliance
        • Florida Homestead Exemption
        • Guardianships
        • Marital Agreements
        • Private Foundations
        • Probate and Orphans’ Court Practice
        • Special Needs Planning
        • State Estate, Inheritance, and Fiduciary Taxation and Compliance
        • Tax
        • Trust & Estate Administration
        • Trusts & Estates Litigation
        • Trust Creation, Modification, and Termination
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Securities

  • Download Overview

Leech Tishman’s Securities Team has a record of success representing Fortune 500 companies, global financial institutions, boards of directors, and other globally recognized companies internationally and domestically in state and federal courts across the country.

Our firm has been successful in disposing of securities claims through early motions filings, limiting business disruption and ending litigation quickly and cost-effectively. When cases do move through to the trial phase, our attorneys are experienced in developing an aggressive, compelling legal strategy that produces results.

Our skilled attorneys have a wealth of experience assisting clients in navigating complex shareholder derivative actions. We have represented our clients through successful resolution of derivative claims involving virtually every type of alleged wrongdoing, including fraud, malpractice, failure of oversight, breach of fiduciary duty, restatements, and violations of the law.  

Our attorneys have counseled clients on corporate securities matters, such as:  

  • Representing publicly-traded companies in mergers, acquisitions, and related filings 
  • Counseling on private placements of trust preferred securities, debt, and preferred and common stock 
  • Advising clients on cross-border securities-related issues, including Regulation S compliance 
  • Advising start-up businesses through each phase of venture financing  
  • Assisting boards of directors and board committees to implement policies and procedures, conduct internal investigations, address corporate and transactional issues, and effectuate legal compliance 
  • Counseling clients on beneficial ownership reporting, insider trading rules and regulations, and resale of restricted securities 

Related Areas

  • Corporate

Contact

Steven D. Irwin

Partner

412.261.1600

sirwin@leechtishman.com

Attorneys

Irfan Dinani

Irfan M. Dinani

Partner

Steve Irwin

Steven D. Irwin

Partner

Moshe Kupietzky

Moshe J. Kupietzky

Counsel

Daniel Mongan

Daniel T. Mongan

Partner

Alexander J. Reyes

Alexander J. Reyes

Partner

Brett Warren

Brett J. Warren

Partner

Insights

View All Insights

February 26, 2026 | Press

Partner Steven D. Irwin Quoted in Pittsburgh Post-Gazette Article on Massive Fraud Case

Read More

Brett Warren

November 7, 2025 | Firm News

Corporate Partner Brett J. Warren Admitted to Practice Before the U.S. District Court, Middle District of Pennsylvania

Read More

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