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  • Professionals (439)
  • Capabilities (88)
  • Experience (170)
  • Insights & News (5,138)
  • Other Results (132)

Professionals 439 results

Olga Loy
Olga Loy
Partner
  • Chicago
Email
+1 312-558-6338
vCard

Partner

  • Chicago
James N. Mastracchio
James N. Mastracchio
Partner
  • Washington, DC
Email
+1 202-282-5849
vCard

Partner

  • Washington, DC
Susan Elizabeth Seabrook
Susan Elizabeth Seabrook
Partner
  • Washington, DC
Email
+1 202-282-5220
vCard

Partner

  • Washington, DC
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Capabilities 88 results

Practice Area

Tax

With an international geographic reach, Winston & Strawn’s integrated tax practice addresses virtually all areas of tax law. Our group of 40 tax attorneys is well-versed in representing some of the largest public and privately-held corporations, exempt organizations, and large estates....Read more

Practice Area

Tax Controversy & Criminal Tax

Our Tax Controversy attorneys advise and represent clients in every aspect of federal and state tax investigations, as well as the criminal tax enforcement process. This includes the Internal Revenue Service’s (IRS) multi-jurisdictional examinations and administrative appeals, U.S. Competent Authority representations, post appeals mediation, and trial court and appellate litigation in every federal court hearing a tax matter....Read more

Practice Area

Government Program Fraud, False Claims Act & Qui Tam Litigation

Investigations and litigation involving alleged fraud against the government pose a significant and growing threat to organizations and individuals across all industries that engage directly or indirectly in business with federal, state, and/or local governments. The government makes aggressive use of its extensive criminal and civil investigatory powers to root out alleged fraud and abuse implicating government funds, including one of its most powerful civil enforcement tools—the federal False Claims Act (FCA)—and similar state false claims statutes....Read more

Experience 170 results

Experience

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September 10, 2025

$1.05 Billion PECO Energy Company Public Offering of First and Refunding Mortgage Bonds

We served as underwriters' counsel to BNY Capital Markets, Citigroup, PNC Capital Markets LLC, Scotiabank, US Bancorp, Mizuho and MUFG, as joint book-running managers, in connection with the registered public offering of $1.05 billion of First and Refunding Mortgage Bonds by PECO Energy Company comprised of $525 million 4.875% First and Refunding Mortgage Bonds due 2035 and $525 million 5.650% First and Refunding Mortgage Bonds due 2055....Read more

Experience

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September 9, 2025

Greenland Exploration Limited enters business combination with Pelican Acquisition Corporation and March GL Company

Winston & Strawn LLP represented Greenland Exploration Limited in a landmark business combination with Pelican Acquisition Corporation (NASDAQ: PELI) and March GL Company. The transaction, structured as a merger agreement, will result in the formation of Greenland Energy Company, expected to be publicly listed on NASDAQ under the ticker symbol “GLND.” Winston advised Greenland Exploration on all aspects of the deal, including regulatory strategy, corporate structuring, and negotiation of the merger terms....Read more

Experience

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September 8, 2025

Winston Wins Ninth Circuit Reversal and Class Certification in Swimmers’ Antitrust Case, Securing a Global-Impact Settlement with World Aquatics

Winston represents a class of professional swimmers alleging World Aquatics (WA) violated antitrust laws by blocking their participation in the competing  International Swimming League. After WA won summary judgment, Winston successfully appealed, arguing the court applied improper antitrust standards and wrongly denied certification of a damages class. In September 2024, the Ninth Circuit reversed both rulings, reviving all claims and issuing a landmark ruling on the possible application of the per se rule or quick look review to sports-associations rules. Am Law awarded Winston “Litigator of the Week” Runner-Up recognition for the win. In November 2024, the Ninth Circuit denied rehearing. In April 2025, the district court certified a damages class....Read more
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Insights & News 5,138 results

Seminar/CLE

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November 13, 2025

AI in Action: Legal Strategies for Healthcare Innovation

We are bringing together stakeholders across the healthcare ecosystem—from front-line providers to financial backers—for a panel discussion on AI in healthcare....Read more

Sponsorship

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October 27, 2025

Winston & Strawn Sponsors Tokyo Forum on U.S. Capital, Digital Assets, and AI Innovation

Winston & Strawn is proud to sponsor the upcoming Beyond Borders, Beyond Markets Tokyo Forum on U.S. Capital, Digital Assets, and AI Innovation. This event brings together global investors to explore the future of finance—from IPO strategies to AI’s role in capital markets. The forum will discuss the nuances of going public in America and offer key considerations for capital access and enhanced liquidity....Read more

Competition Corner

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October 23, 2025

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2 Min Read

California Strengthens Its Antitrust Law with Stiffer Penalties

On October 6, 2025, California Governor Gavin Newsom signed into law S.B. 763, which will comprehensively strengthen the enforcement framework of California’s Cartwright Act. 

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Other Results 132 results

Site Content

What Is the JOBS Act?

The Jumpstart Our Business Startups (JOBS) Act is legislation, enacted on April 5, 2012, designed to encourage funding of small businesses in the U.S. by easing securities regulations and therefore making it easier for private companies to access the public capital markets....Read more

Site Content

What Is Tax Evasion?

Tax evasion is the failure to pay or the deliberate underpayment of federal income taxes. The U.S. income tax system is based on voluntary compliance, and it is the taxpayer’s responsibility to report all income and to pay all taxes due. Tax evasion is a known violation of a legal duty, and may result in monetary penalties, imprisonment, or both....Read more

Site Content

What Is a Tax Authority?

A tax authority is a government body or agency responsible for collecting taxes, administering tax laws, and enforcing tax compliance. In the United States, the Internal Revenue Service (IRS) is the federal tax authority. Most states, territories, and local jurisdictions also have tax authorities to ensure compliance with applicable state and local laws and regulations. These tax authorities are generally responsible for collecting taxes, administering tax laws, and enforcing tax compliance in their respective jurisdictions....Read more
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