Atty. Stephan J. Mallenbaum

Atty. Stephan J. Mallenbaum

Stephan J. Mallenbaum is a lawyer practicing mergers & acquisitions, venture capital, international law and 6 other areas of law.

New York New York 46 yrs experience 46 year
Call (866) 467-7930 Book Appointment

Profile Summary

About Stephan J. Mallenbaum at a glance

Stephan J. Mallenbaum is an Attorney based in New York, New York, practicing at Seeger Weiss LLP. They have 46+ years of legal experience, licensed to practice since 1980. Their practice focuses on business, ip, m&a, securities, and international. Admitted to practice in Massachusetts (1980) and New York (1983). Educated at Cornell Law School (J.D., 1980) and Massachusetts Institute of Technology (B.S., 1977). Serands clients in New York, NY and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Stephan J. Mallenbaum is a lawyer practicing mergers & acquisitions, venture capital, international law and 6 other areas of law
  • Stephan received a B.S. degree from Massachusetts Institute of Technology in 1977, and has been licensed for 46 years
  • Stephan practices at Seeger Weiss LLP in New York, NY

Practice Areas Explained

Stephan J. Mallenbaum's Areas of Practice

Each practice area below reflects the types of cases Stephan J. Mallenbaum handles, with a brief overview of what that area of law covers.

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

Stephan J. Mallenbaum is one of 501,317 business attorneys indexed nationally. Browse business attorneys in New York →

Intellectual Property

IP attorneys protect inventions, brands, and creative work through patent prosecution, trademark registration, copyright, and trade-secret enforcement.

Stephan J. Mallenbaum is one of 106,079 ip attorneys indexed nationally. Browse ip attorneys in New York →

Mergers & Acquisitions

Stephan J. Mallenbaum is one of 49,731 m&a attorneys indexed nationally. Browse m&a attorneys in New York →

Securities Law

Stephan J. Mallenbaum is one of 64,529 securities attorneys indexed nationally. Browse securities attorneys in New York →

International Law

International law attorneys for cross-border transactions, trade, foreign investment, and treaties.

Stephan J. Mallenbaum is one of 40,133 international attorneys indexed nationally. Browse international 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.

Looking for additional New York attorneys? Browse all attorneys in New York or all attorneys in New York.

Frequently Asked

Common questions about Stephan J. Mallenbaum

Where is Stephan J. Mallenbaum's law office located?
Stephan J. Mallenbaum's law practice is located in New York, New York. The firm is Seeger Weiss LLP. You can contact the office directly through this profile page.
What practice areas does Stephan J. Mallenbaum handle?
Stephan J. Mallenbaum focuses on business, ip, m&a, securities, international. Each practice area listed reflects experience handling cases of that type in New York.
How long has Stephan J. Mallenbaum practiced law?
Stephan J. Mallenbaum has 46+ years of legal experience and has been licensed since 1980.
Where did Stephan J. Mallenbaum go to law school?
Stephan J. Mallenbaum earned their education at (J.D., 1980); (B.S., 1977).
How can I contact Stephan J. Mallenbaum for a consultation?
You can contact Stephan J. Mallenbaum directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

J.D.
Cornell Law School
- 1980
B.S.
Massachusetts Institute of Technology
- 1977

Bar Admissions

Massachusetts
Admitted: 1980
New York
Admitted: 1983

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