O’BRIEN LLP

COMPLEX COMMERCIAL LITIGATION

ATTORNEYS

PRACTICE AREAS

Complex Commercial Litigation

O’Brien LLP provides representation of the highest quality in complex commercial litigation, regulatory defense matters, employment and trade secret disputes, and white-collar criminal defense matters.   Our attorneys have successfully represented large and small businesses, including hedge funds, private equity firms, commercial banks and investment banks, broker-dealers, technology firms, family offices, as well as the principals and employees of such firms or entities, in a wide range of litigation and investigations throughout the country.   As counsel to plaintiffs and defendants, we have had great success in both trial and appellate courts.   The firm combines sophistication and wide experience with the tenacity and trial skills of a boutique firm.

Employment and Trade Secrets Matters

We have represented both employers and employees in contract negotiations, in disputes and in litigation relating to employment compensation contracts, non-competition agreements and trade secrets. We also regularly advise employers, employees, partners and principals in negotiating employment and separation agreements, agreements governing investment management entities, and agreements governing business separations.

Regulatory and White-Collar Criminal Defense

We have significant experience representing clients in civil regulatory investigations commenced by the Securities & Exchange Commission, the New York Attorney General, as well as other regulatory authorities.

The attorneys at O’Brien LLP have extensive experience defending corporations and their principals in private actions brought under the Federal Securities laws, including individual and class actions under Section 10(b).

O’BRIEN LLP

© 2026 All Rights Reserved

900 Third Avenue, 18th Floor New York, NY 10022

Phone: 917-207-7132

O’BRIEN LLP

COMPLEX COMMERCIAL LITIGATION

ATTORNEYS

PRACTICE AREAS

Complex Commercial Litigation

O’Brien LLP provides representation of the highest quality in complex commercial litigation, regulatory defense matters, employment and trade secret disputes, and white-collar criminal defense matters.   Our attorneys have successfully represented large and small businesses, including hedge funds, private equity firms, commercial banks and investment banks, broker-dealers, technology firms, family offices, as well as the principals and employees of such firms or entities, in a wide range of litigation and investigations throughout the country.   As counsel to plaintiffs and defendants, we have had great success in both trial and appellate courts.   The firm combines sophistication and wide experience with the tenacity and trial skills of a boutique firm.

Employment and Trade Secrets Matters

We have represented both employers and employees in contract negotiations, in disputes and in litigation relating to employment compensation contracts, non-competition agreements and trade secrets. We also regularly advise employers, employees, partners and principals in negotiating employment and separation agreements, agreements governing investment management entities, and agreements governing business separations.

Regulatory and White-Collar Criminal Defense

We have significant experience representing clients in civil regulatory investigations commenced by the Securities & Exchange Commission, the New York Attorney General, as well as other regulatory authorities.

The attorneys at O’Brien LLP have extensive experience defending corporations and their principals in private actions brought under the Federal Securities laws, including individual and class actions under Section 10(b).

O’BRIEN LLP

© 2026 All Rights Reserved

900 Third Avenue, 18th Floor New York, NY 10022

Phone: 917-207-7132

O’BRIEN LLP

COMPLEX COMMERCIAL LITIGATION

ATTORNEYS

PRACTICE AREAS

Complex Commercial Litigation

O’Brien LLP provides representation of the highest quality in complex commercial litigation, regulatory defense matters, employment and trade secret disputes, and white-collar criminal defense matters.   Our attorneys have successfully represented large and small businesses, including hedge funds, private equity firms, commercial banks and investment banks, broker-dealers, technology firms, family offices, as well as the principals and employees of such firms or entities, in a wide range of litigation and investigations throughout the country.   As counsel to plaintiffs and defendants, we have had great success in both trial and appellate courts.   The firm combines sophistication and wide experience with the tenacity and trial skills of a boutique firm.

Employment and Trade Secrets Matters

We have represented both employers and employees in contract negotiations, in disputes and in litigation relating to employment compensation contracts, non-competition agreements and trade secrets. We also regularly advise employers, employees, partners and principals in negotiating employment and separation agreements, agreements governing investment management entities, and agreements governing business separations.

Regulatory and White-Collar Criminal Defense

We have significant experience representing clients in civil regulatory investigations commenced by the Securities & Exchange Commission, the New York Attorney General, as well as other regulatory authorities.

The attorneys at O’Brien LLP have extensive experience defending corporations and their principals in private actions brought under the Federal Securities laws, including individual and class actions under Section 10(b).