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  1. Capabilities

Securities, M&A & Corporate Governance Litigation

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  • Overview
  • Experience

Key Contacts

James P. Smith III
View Our Full Team

Resources

Class Action Insider

In today’s market, litigators with experience in securities, corporate governance, and M&A-related (collectively, “securities litigation”) matters need to leverage their broad experience to serve as both advocate and as counsel and strategist, focused on helping clients to overcome not just a legal issue but a collective business problem. Given the frequent interplay between things such as corporate-control transactions, public offerings, activist shareholders, the use of complex derivatives and other financial instruments, bad news impacting stock performance, regulatory inquiries and investigations, and insurance coverage, strategic and tactical litigation decisions can have a wide-ranging impact on the success of a given transaction, as well as on companies, their boards, senior management, and advisors.

Our securities litigation team “sees the entire field,” collaborating with lawyers from related practice areas—transactional M&A and securities, antitrust, white collar, bankruptcy, executive compensation—and those who are focused on our clients’ sectors. We develop tailored strategies that protect our clients’ interests and maximize their chances of success. We are well versed in litigating federal securities class actions, shareholder derivative suits, M&A-related challenges, proxy contests, ERISA class actions, and securities-related adversary proceedings in bankruptcy, and in conducting internal investigations and defending regulatory investigations and enforcement actions. We often handle multi-front litigation given the scourge of parallel proceedings.

Key Contacts

James P. Smith III
View Our Full Team

Areas of Focus

We routinely defend public companies, directors and officers (D&Os), board committees, underwriters, auditors, and others in “stock-drop” and other class actions (and individual suits) brought by shareholders and other interested parties, alleging securities fraud and related claims. We have litigated claims brought under all federal and state securities laws and regulations. Our cases have arisen out of IPOs and other offerings, “earnings surprises,” financial restatements, government investigations, product failures and other bad news or “corporate trauma.”

Derivative Suits

We have similarly deep experience representing companies, boards of directors, board constituencies, special litigation committees (SLCs), and others in Delaware and state and federal courts nationwide in all types of shareholder and other derivative suits and related actions. We have responded to stockholder-demand letters, obtained dismissals of Caremark (“oversight”) claims for failure to plead “demand futility” and based on “102(b)(7)” exculpatory charter provisions, and successfully tried such claims to verdict, obtaining stays of derivative suits brought in parallel with federal securities class actions and responding to “220 demands” to inspect corporate books and records.

We represent private and public companies, directors, board committees, investors, private equity firms, and financial advisors in the full range of corporate-control litigation. We litigate in Delaware and other forums nationwide. We routinely handle matters arising out of tender offers, mergers and acquisitions, MBOs, LBOs, controlling-stockholder and other “going-private” transactions, spin-outs, spin-offs, recapitalizations, and asset purchases. Our experience includes:

  • Hostile-takeover litigation
  • Proxy contests
  • Defense of expedited shareholder class actions seeking preliminary injunctions for alleged breaches of fiduciary duty, disclosure, and/or federal proxy rule violations
  • Successful mounting and fending off challenges to defensive devices (poison pills, break-up fees, no-shops and other “lock-ups”)
  • “Busted deal” (MAC/MAE) litigation
  • Post-closing disputes relating to earn-outs, purchase-price/working-capital adjustments, and indemnification for breaches of representations and warranties

We are a frontrunner in the field of reps and warranties litigation. With an in-depth understanding of the complexities and nuances of contractual agreements, we are skilled at meticulously analyzing contracts, identifying potential breaches, and formulating comprehensive litigation strategies. This enables us to deliver favorable outcomes for our clients in SPAC-related matters, making us a go-to choice for clients seeking exceptional counsel in this nuanced area of law.

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We are well versed in the intricate landscape of corporate governance, shareholder activism, and proxy contests, and can navigate the complexities of these matters easily. We excel in advising and representing clients on issues such as boardroom disputes, activist campaigns, shareholder proposals, and contested proxy solicitations. Our proven track record of achieving favorable outcomes in corporate governance, activism, and proxy contests positions us as a trusted partner for clients seeking exceptional representation in this dynamic area.

As a leader in D&O securities litigation, we navigate such matters with precision. We are adept at formulating effective defense strategies, mitigating risks, and achieving favorable outcomes for our clients, consistently demonstrating our value as a trusted advisor and a formidable force in the field.

We represent public and private companies, boards, audit committees, special committees, SLCs, and management, as independent special counsel and otherwise, in handling complex internal investigations arising from auditor 10A demands, shareholder derivative demands, whistleblower claims, and/or the client’s own initiative. We advise directors and board committees on their fiduciary duties and corporate governance “best practices” during such investigations, protect applicable privileges, and minimize the risks such investigations can create for parallel or follow-on proceedings. We team well with forensic consultants, other experts, and/or the company’s auditors, as needed.

We have exceptional experience in Special Purpose Acquisition Company (SPAC) and de-SPAC litigation. Operating at the vanguard of this area, we possess an in-depth understanding of the complex regulatory framework governing SPAC transactions. We possess a proven track record of successfully advising and representing clients involved in SPAC mergers and acquisitions and guiding them through the de-SPAC process. With a combination of legal acumen, industry knowledge, and a keen eye for emerging trends, our firm is well equipped to provide our clients with tailored and innovative solutions in the realm of SPAC and de-SPAC litigation.

Hardworking, intelligent group of lawyers. Depth of resources is a big differentiator for them.

Client Quote—The Legal 500 US 2023

Related Capabilities

Capital Markets
Class Actions & Group Litigation
Corporate Governance
Environmental, Social & Governance (ESG)
Litigation/Trials
Mergers & Acquisitions
Private Equity
Government Investigations, Enforcement & Compliance
Cryptocurrencies, Digital Assets & Blockchain Technology
Financial Services
Food & Beverage
Health Care
Life Sciences
Medical Devices

Recent Experience

Winston Wins Unanimous Supreme Court Case Clarifying Securities Fraud Liability
Won Rare Denial of Class Certification for Medtronic in Securities Fraud Litigation
Prevailed before Supreme Court for Omnicare in Landmark Securities Act Case

Resources

Class Action Insider
Client SuccessWinston Prevails for Omnicare in Landmark Supreme Court Securities Act Case
Winston & Strawn successfully represented Omnicare and its officers and directors before the U.S. Supreme Court, securing a unanimous victory in the most important Securities Act case in decades. 
Learn More
Client SuccessWinston Prevails for Omnicare in Landmark Supreme Court Securities Act Case
Winston & Strawn successfully represented Omnicare and its officers and directors before the U.S. Supreme Court, securing a unanimous victory in the most important Securities Act case in decades. 
Learn More

Related Insights & News

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Winston Team Featured in Litigator of the Week Column

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Winston Partners Honored During the 2025 California Legal Awards

April 23, 2025

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John Schreiber Named to Los Angeles Times' 2025 Law Firm Visionaries List

April 21, 2025

In the Media

Bill O’Neil Discusses Overhaul of Delaware’s Corporate Law with Bloomberg Law

April 3, 2025

Webinar
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March 25, 2025

Sponsorship
Winston & Strawn Sponsors SIFMA C&L Annual Seminar

March 23, 2025

In the Media
Andrew Hinkes Presents Arguments to SEC Crypto Task Force for Revised Interpretation of Securities Laws as They Pertain to Digital Assets

March 3, 2025

Blog
SEC Staff Under New Administration Issues Statement Declaring That Meme Coins Are Not Securities

February 28, 2025

In the Media

Joe Motto Discusses DEI Policy Disclosures with Bloomberg Law

May 7, 2025
Client Alert
Securities Litigation Risk in the Evolving DEI Landscape
April 28, 2025
Sponsorship
Winston & Strawn Explores Digital Assets Regulations at Harvard Law's Blockchain and FinTech Initiative Conference
April 25, 2025
Recognitions
Winston Team Featured in Litigator of the Week Column
April 25, 2025
Webinar
AI for Public Companies: Leveraging Innovation for Growth & Compliance
April 23, 2025
Recognitions
Winston Partners Honored During the 2025 California Legal Awards
April 23, 2025
Recognitions
John Schreiber Named to Los Angeles Times' 2025 Law Firm Visionaries List
April 21, 2025
In the Media

Bill O’Neil Discusses Overhaul of Delaware’s Corporate Law with Bloomberg Law

April 3, 2025
Webinar
Mastering the IPO Process in 2025: Challenges and Opportunities
March 25, 2025
Sponsorship
Winston & Strawn Sponsors SIFMA C&L Annual Seminar
March 23, 2025
In the Media
Andrew Hinkes Presents Arguments to SEC Crypto Task Force for Revised Interpretation of Securities Laws as They Pertain to Digital Assets
March 3, 2025
Blog
SEC Staff Under New Administration Issues Statement Declaring That Meme Coins Are Not Securities
February 28, 2025
View All Insights & News
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