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  • Professionals (168)
  • Capabilities (71)
  • Experience (22)
  • Insights & News (916)
  • Other Results (38)

Professionals 168 results

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

Partner

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

Partner

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

Partner

  • Chicago
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Capabilities 71 results

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

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

Industry

Energy Transition

As core segments of the global economy continue to embrace sustainable and carbon-neutral energy resources as complementary and integral to fossil-based systems of energy production and consumption, we stand ready to guide our clients through the energy transition. Our team is at the forefront of the flourishing energy transition market, and we bring practical experience, perspective, and innovative thinking to the sector. By combining our more than 40 years of experience in renewable and conventional energy with an integrated service approach, we help clients to plan for, invest in, and thrive in today’s shifting environment. Not only does our team include experienced energy and corporate lawyers, but also practitioners with deep experience in tax credits and tax equity, project finance, infrastructure, and power and renewables to serve the varied needs of our client base....Read more

Experience 22 results

Experience

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January 22, 2026

Advised SQM on US$600M offering of subordinated capital notes due 2056 (Hybrid Bond Offering)

Winston & Strawn LLP advised longstanding client Sociedad Química y Minera de Chile S.A. (“SQM”) (NYSE: SQM) on its US$600 million offering of subordinated capital notes. The notes were offered in the United States pursuant to Rule 144A and outside the United States pursuant to Regulation S.The subordinated capital notes are due in 2056 and constitute SQM’s first international hybrid bond issuance, structured to be consistent with SQM’s recent UF 10 million (approximately US$ 430 million) Series S hybrid-subordinated bond issuance in the Chilean securities market. The notes bear an initial annual interest rate of 5.625% and are subject to reset on April 22, 2031 (the “First Reset Date”), and on every fifth anniversary thereafter, based on a spread over the 5-year U.S. Treasury bond rate, with interest rate step-ups on the fifth and twentieth anniversaries of the First Reset Date. The transaction closed on January 22, 2026.BofA Securities, Inc., Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, Santander US Capital Markets LLC, and Scotia Capital (USA) Inc. acted as initial purchasers of the notes.Link Capital Partners was financial advisor to SQM.SQM is a global company with a leading position in the lithium, iodine, and potassium nitrate markets. It develops and produces a diverse range of products for industries essential to human progress, including health, nutrition, renewable energy, and technology, driven by innovation and technological development.The Winston & Strawn team advising on the transaction included corporate partner Sey-Hyo Lee (New York) and foreign legal advisor Bruno M. Fiorino (New York). Partner Katherine Erbeznik (New York) advised on tax matters....Read more

Experience

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January 6, 2026

Brightwood Capital’s Acquisition of Museum of Illusions Group

A team led by Bradley Vaiana and Austin Leach represented Brightwood Capital Advisors, LLC (“Brightwood”), a New York–based investment firm, in its acquisition of Museum of Illusions Group, the world’s largest privately held chain of museums, from Invera Capital Partners. As part of the transaction, five previously franchised locations will transition from the chain’s largest franchisee, LOL Entertainment, to become corporate-owned sites. Winston attorneys across multiple practice areas and offices, including M&A, Tax, Intellectual Property, Employee Benefits, and the firm’s UK office, assisted in structuring a complex cross-border transaction to support Brightwood's fund investment goals. The acquisitions were completed on January 6, 2026....Read more

Experience

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November 7, 2025

Precision Aviation Group - Acquisition of Helicopter Engine Repair Overhaul Services

A team led by Austin Leach and Justin Levy represented Precision Aviation Group (PAG) in its acquisition of H.E.R.O.S., a premier Rolls-Royce M250/RR300 engine MRO provider, and its affiliate, Hye-Tech Manufacturing. ...Read more
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Insights & News 916 results

Sponsorship

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February 22, 2026

Winston & Strawn Sponsors, Speaks at SFVegas 2026

Winston & Strawn is proud to sponsor the Structured Finance Association’s flagship SFVegas 2026 conference in Las Vegas. SFVegas is the premier global gathering for the structured finance community, drawing over 9,000 professionals from across the industry to explore the trends, challenges, and opportunities shaping securitization, lending, and capital formation....Read more

Global Trade & Foreign Policy Insights

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February 19, 2026

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9 Min Read

United States Issues Significant New Sanctions Relief for Venezuela’s Oil & Gas Sector

Although Venezuela remains subject to sanctions targeting the Government of Venezuela (GoV) and entities in which it holds a 50% or greater ownership interest, the U.S. Department of the Treasury’s Office of Foreign Assets Control (OFAC) has issued a series of General Licenses (GLs) representing the broadest easing of Venezuela-related sanctions in years.

Recognitions

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February 5, 2026

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1 Min Read

Winston & Strawn Recognized in Chambers France 2026

Chambers France 2026 ranked Winston & Strawn as a leading law firm in Private Equity: Mid-Market, Pharma/Life Sciences, and Tax. Additionally, individual Winston lawyers were ranked in Banking & Finance, Pharma/Life Sciences, Private Equity, and Tax....Read more
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Other Results 38 results

Site Content

What Is Tax Controversy?

A tax controversy is a dispute between a taxpayer and a tax authority such as the United States Internal Revenue Service (IRS) concerning whether the taxpayer has properly reported and paid their tax liability, and otherwise complied with applicable tax law. A tax controversy may concern a disagreement regarding the correct amount of tax or the manner in which the IRS is attempting to collect tax, as well as whether penalties are appropriate. Tax controversies may be resolved administratively or in litigation....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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