Atty. Dennis J. Block
Dennis J. Block is the Senior Chairman of the firm’s Global Corporate M&A Practice.
Profile Summary
About Dennis J. Block at a glance
Dennis J. Block is a business and m&a attorney based in New York, New York, practicing at Greenberg Traurig. Educated at Brooklyn Law School (J.D., 1967). Recognitions include Best Lawyers in America — Corporate Law (2026), Best Lawyers in America — Mergers and Acquisitions Law (2026), and Best Lawyers in America — Additional Areas of Practice: (2026). Serands clients in New York, NY and the surrounding metropolitan area.
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About
- Dennis J. Block is the Senior Chairman of the firm’s Global Corporate M&A Practice
- He has handled numerous mergers and acquisitions transactions - both hostile and friendly - on behalf of acquirers, targets, and investment banks
- The range of transactions handled by Dennis includes mergers, acquisitions, proxy contests, joint ventures, third-party tender offers, self-tender offers, and spin offs, and other forms of corporate restructurings and financings
- As a corporate counselor, Dennis has been retained to represent public companies, entrepreneurs, private equity and hedge funds, and investment and commercial banks in connection with issues of major public interest and debate
- For example, he represented the Business Roundtable regarding corporate governance issues, Texaco regarding discrimination matters, Cendant directors regarding board liability, General Motors regarding Ross Perot, and Merrill Lynch regarding the Orange County bond default and in the Nasdaq litigation in which Dennis was the industry negotiator for the $1 billion settlement
- Dennis’ practice includes the general representation, either on a continuous basis, or from time to time, of a number of large publicly-held corporations, including Pfizer Inc., Bear, Stearns & Co. (now part of JPMorgan Chase), Quaker Oats Company (now part of PepsiCo), Procter & Gamble, Merrill Lynch, CBS, US WEST (now part of Qwest Communications International), General Electric, General Motors, Telstra, Inc., MediaOne Group (now part of AT&T), Dayton Power and Light, J.C
- Penney, Six Flags, Wakefern Food Corp. (ShopRite), Mack-Cali, True Religion and Trian Partners
- Dennis’ practice involves the representation of Corporate Boards and Audit, Compensations, and Special Committees thereof in connection with numerous issues, including corporate governance
- Dennis also represents public companies in connection with Securities and Exchange Commission (SEC) matters, including investigations
- Dennis has been Co-Chairman of the Committee on Corporate Counsel and a member of the Council of the Section of Litigation of the American Bar Association
- From 1993-1998, Dennis served as a member of the Committee on Corporate Laws of the Section of Business Law of the American Bar Association
- He has co-authored The Business Judgment Rule: Fiduciary Duties of Corporate Directors (5th ed. 1998 and Supp. 2000)
- He was also co-author of a monthly column in the New York Law Journal, co-editor of The Corporate Counsellor’s Deskbook (5th ed. 1999), and a member of the editorial boards of several legal publications
- In addition to writing, Dennis frequently lectures on mergers and acquisitions, the business judgment rule, corporate governance, federal securities laws, corporate litigation, the attorney-client privilege, professional responsibility, and indemnification and insurance of corporate officials
- He has been consistently ranked in the first tier as one of the leading corporate/M&A lawyers in Chambers Global and included in Best Lawyers in America
- Dennis is a graduate of Brooklyn Law School where he teaches Advanced Corporate Law as an Adjunct Professor
- Before entering private practice, Dennis was a Branch Chief for Enforcement in the New York Regional Office of the SEC
Practice Areas Explained
Dennis J. Block's Areas of Practice
Each practice area below reflects the types of cases Dennis J. Block handles, with a brief overview of what that area of law covers.
Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.
Dennis J. Block is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →
Dennis J. Block is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in New York →
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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