Tammy L. Roy
Partner
212.701.3720
troy@cahill.com
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Cahill Gordon & Reindel LLP
32 Old Slip
New York, NY 10005
Practices
- Broker-Dealer – Regulatory & Litigation
- First Amendment & Media Litigation
- Commercial Litigation
- Securities Litigation, Regulation & Enforcement
- White Collar Defense & Investigations
- Congressional Investigations
Education
- George Washington University Law School, J.D., 2001, High Honors
- University of Pennsylvania, B.A., 1998, cum laude
Admissions
- New York
- Massachusetts
Tammy Roy is a member of Cahill's Executive Committee and Co-Chair of the firm's Commercial Litigation practice group. She is an accomplished trial attorney who represents global corporations and financial institutions in complex commercial and securities litigation in federal and state courts throughout the country and in connection with regulatory investigations and enforcement matters.
Tammy has been praised by Chambers as a “partner who is the full picture,” “pragmatic in terms of how she thinks about the business perspective and needs,” and “great on her feet in court and a real talent.” Clients note that she is “super detail-oriented and great at handling thorny issues in the details.” In addition to being ranked as a leading litigator by Chambers USA, Tammy has also been recognized by The Legal 500, named as a Litigation Star by Benchmark Litigation, and was featured among the 2020 Notable Women in Law by Crain’s New York Business.
"Tammy is intelligent, practical and really takes the time to understand not only the issue at hand but also to understand its impact on the business." – Chambers USA
In 2024, Tammy was named as a Thomson Reuters Stand-out Lawyer. She was recognized as a 2023 General Litigation Trailblazer by The National Law Journal, and in 2022 as one of The American Lawyer’s Litigators of the Week, for her role in the winning defense of Credit Suisse in a jury trial in the Southern District of New York involving claims of a 16-bank global conspiracy to fix prices in the foreign exchange market in violation of the federal antitrust laws. Tammy was shortlisted for the Women in Business Law Awards Americas, Financial Regulation Lawyer of the Year for both 2022 and 2023 and is listed in Lawdragon’s 500 Leading Litigators in America guide. Earlier in her career, Tammy was named to Benchmark Litigation’s “Under 40 Hot list.”
Tammy joined Cahill in 2001, and was elected to the partnership in 2010. She serves as Chair of the firm’s Women’s Initiatives Committee.
- Served as a lead counsel in the defense of S&P Global in connection with civil lawsuits and government inquiries around the United States and abroad, arising out of its ratings of structured finance securities, sovereigns, public finance, and bond insurers following the Financial Crisis.
- Secured a jury trial victory for a global bank in the Southern District of New York involving claims of a 16-bank global conspiracy to fix prices in the foreign exchange market in violation of the federal antitrust laws.
- Prevailed on behalf of UBS Securities LLC in a six-day FINRA arbitration hearing of a $20 million claim filed against UBS by a hedge fund and related entities.
- Represents Credit Suisse in connection with a series of class action lawsuits filed in the aftermath of the March 2023 announcement of the merger of Credit Suisse and UBS.
- Represents UBS Securities in two alleged market manipulation “spoofing” cases pending in the Southern District of New York.
- Represents Credit Suisse in a consolidated class action alleging that Credit Suisse violated the federal securities laws by manipulating the market and failing to disclose adequately the risks associated with its offering of Velocity Shares Daily Inverse VIX Short Term ETNs.
- Successfully represented S&P Global in five related actions filed in the Southern District of New York, alleging that S&P made misrepresentations in connection with the rating of a fund that invested in life settlement securitizations.
- Won a dismissal with prejudice for ICON plc in a qui tam action brought in Texas federal court, alleging violations of the False Claims Act.
- Won dismissals, affirmed on appeal, of multiple putative securities class actions against S&P alleging that it was subject to liability as an underwriter under Section 11 of the Securities Act of 1933 in connection with its ratings of residential mortgage-backed securities.
- Won dismissal, affirmed on appeal, of a putative securities class action against S&P and certain of its former officers alleging violations of the federal securities laws in connection with alleged misstatements and omissions in S&P’s SEC filings and other public statements.
- Won a dismissal with prejudice of a securities class action lawsuit against Global Power Equipment Group on the grounds that Plaintiffs had not pleaded a strong inference of scienter.
- Defended a leading global insurer in a class action in state court in Alabama alleging fraud claims in connection with the earlier settlement of multiple securities class actions.
- Prevailed on behalf of a public company in obtaining the dismissal with prejudice of a putative securities class action filed after the company announced its intent to restate certain of its prior financial statements.
- Represented a major financial institution in a bench trial in federal court in connection with claims relating to its role as lead underwriter for an issuance of pension obligation bonds.
- Has represented companies in a variety of industries in defense of purported class action lawsuits involving alleged violations of the federal securities laws.
- Has successfully defended multiple companies in arbitration trials seeking hundreds of millions of dollars in damages.
- Successfully defended numerous actions (including state and federal class actions and several arbitrations) that alleged an employee benefit plan offered by a securities retail brokerage firm operated to effect an illegal forfeiture of wages.