Breanne E.Vaclavik
Partner
Corporate
bvaclavik@seyfarth.com
Breanne focuses her practice on middle-market M&A, where disciplined execution and practical judgment are key to balancing competing deal priorities and getting transactions closed.
More About Breanne
Breanne acts as lead advisor for a diverse client base, from founder-led and growth-stage companies to established private equity platforms and global enterprises. Her practice spans the full life cycle of M&A deals, including structuring, negotiation, due diligence, financing, and post-closing integration. She is known for her practical, business-oriented counsel and her ability to deliver efficient, results-driven outcomes in complex, fast-moving transactions. Drawing on her deep understanding of both deal dynamics and client priorities, she translates business objectives into clear legal strategies that preserve enterprise value and mitigate risk.
Her clients appreciate her project management and coordination across stakeholders, precision in drafting and negotiation, and disciplined management of the deal process. Breanne frequently partners with Seyfarth’s technology and innovation teams to integrate innovative tools that streamline closings, improve collaboration and efficiency, enhance due diligence accuracy, and create measurable value for her clients.
In addition to her transactional work, Breanne actively tracks developments in deal terms, market trends, and regulatory changes shaping the M&A landscape. Breanne is a trusted advisor to clients on corporate governance, commercial contracting, commercial finance, and general corporate matters, often serving as outside general counsel to middle-market and growth-stage businesses. Her legal insight helps her clients balance speed, risk, and commercial priorities to effectively navigate their day-to-day operations and achieve their long-term strategic goals.
Her clients appreciate her project management and coordination across stakeholders, precision in drafting and negotiation, and disciplined management of the deal process. Breanne frequently partners with Seyfarth’s technology and innovation teams to integrate innovative tools that streamline closings, improve collaboration and efficiency, enhance due diligence accuracy, and create measurable value for her clients.
In addition to her transactional work, Breanne actively tracks developments in deal terms, market trends, and regulatory changes shaping the M&A landscape. Breanne is a trusted advisor to clients on corporate governance, commercial contracting, commercial finance, and general corporate matters, often serving as outside general counsel to middle-market and growth-stage businesses. Her legal insight helps her clients balance speed, risk, and commercial priorities to effectively navigate their day-to-day operations and achieve their long-term strategic goals.
- JD, DePaul University College of Law
- BA, University of Michigan
- Illinois
- US District Court, Northern District of Illinois
- Illinois Supreme Court
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Oct 7, 2026
Seyfarth to Sponsor and Breanne Vaclavik to Speak at the 2026 ACG Chicago Midwest Capital Connection
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Aug 20, 2026
362 Seyfarth Attorneys Recognized in 2027 Best Lawyers Rankings; Five Awarded "Lawyer of the Year"
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- Recognized as a "Ones to Watch" lawyer by Best Lawyers in America (Woodward/White Inc.) for Corporate Law and Mergers and Acquisitions Law (2026)
- Recognized for M&A: middle-market (sub-$500m) as a Next Generation Partner (2026); Leading Associate (2025); and Rising Star by Legal 500 (Legalese Ltd.) (2024)
- Named Emerging Leader by M&A Advisor (2026)
- Association of Corporate Growth (ACG) Member, Chicago Chapter
- American Bar Association Member (Section on Business Law; Young Lawyers Division)
- Co-Author, "2025 Healthcare M&A Guide (USA Chapter)," Chambers (June 3, 2025)
- Interviewee, "Expert Q&A: Effects of the Interim Final Rule on Corporate Transparency Act (CTA) Compliance," Practical Law (June 2, 2025)
- Co-Author, “FinCEN Reinstates BOI Reporting Under the Corporate Transparency Act,” Legal Update, Seyfarth Shaw LLP (February 19, 2025)
- Co-Author, “FinCEN Acknowledges Nationwide Preliminary Injunction on CTA Enforcement – Voluntary Submission Only,” Legal Update, Seyfath Shaw LLP (December 10, 2024)
- Co-Author, “Expert Q&A: Update on the Corporate Transparency Act (CTA),” Thomson Reuters’ Practical Law (November 15, 2024)
- Co-Author, "Upcoming Deadline for Corporate Transparency Act Compliance," Legal Update, Seyfarth Shaw LLP (November 20, 2024)
- Co-Author, “FinCEN's October 2024 Beneficial Ownership Information FAQ Update,” Legal Update, Seyfarth Shaw LLP (October 4, 2024)
- Contributing Author, Healthcare M&A 2024 Guide (USA Chapter) (June 18, 2024)
- Chapter Author, “Confidentiality and Nondisclosure Agreements in Mergers and Acquisitions,” in the 2023 edition of Business Law: Mergers and Acquisitions (November 1, 2023)
- Co-Author, "2023 Edition Business Law: Mergers and Acquisitions," Illinois Institute for Continuing Legal Education (October 2, 2023)
- Co-Author, Digital Health 2023, Seyfarth Shaw LLP (January 2023)
- Panelist, "Dealmakers Roundtable: An Unfiltered View of the Middle Market," ACG Chicago's 2026 Midwest Capital Connection conference, Chicago, IL (October 8, 2026)
- Co-Presenter, “CTA Compliance in 2025: What’s Changed & What’s Next,” Webinar, Seyfarth Shaw LLP (March 20, 2025)
- Co-Presenter, "Anatomy of an M&A Transaction," ACG Chicago's M&A Academy session (February 13, 2025)
- Co-Presenter, “Critical Information for Year-End CTA Compliance,” Webinar, Seyfarth Shaw LLP (October 24, 2024)
- Co-Presenter, "Health Care Beat Episode 36: US Digital Health Series – Transactional Issues," Podcast, Seyfarth Shaw LLP (April 26, 2023)
Breanne’s analytical ability, thoroughness and judgment is outstanding. It is actually quite impressive how calm and focused she remains under "deal pressure." —Client feedback
Breanne focuses her practice on middle-market M&A, where disciplined execution and practical judgment are key to balancing competing deal priorities and getting transactions closed.
More About Breanne
Breanne acts as lead advisor for a diverse client base, from founder-led and growth-stage companies to established private equity platforms and global enterprises. Her practice spans the full life cycle of M&A deals, including structuring, negotiation, due diligence, financing, and post-closing integration. She is known for her practical, business-oriented counsel and her ability to deliver efficient, results-driven outcomes in complex, fast-moving transactions. Drawing on her deep understanding of both deal dynamics and client priorities, she translates business objectives into clear legal strategies that preserve enterprise value and mitigate risk.
Her clients appreciate her project management and coordination across stakeholders, precision in drafting and negotiation, and disciplined management of the deal process. Breanne frequently partners with Seyfarth’s technology and innovation teams to integrate innovative tools that streamline closings, improve collaboration and efficiency, enhance due diligence accuracy, and create measurable value for her clients.
In addition to her transactional work, Breanne actively tracks developments in deal terms, market trends, and regulatory changes shaping the M&A landscape. Breanne is a trusted advisor to clients on corporate governance, commercial contracting, commercial finance, and general corporate matters, often serving as outside general counsel to middle-market and growth-stage businesses. Her legal insight helps her clients balance speed, risk, and commercial priorities to effectively navigate their day-to-day operations and achieve their long-term strategic goals.
Her clients appreciate her project management and coordination across stakeholders, precision in drafting and negotiation, and disciplined management of the deal process. Breanne frequently partners with Seyfarth’s technology and innovation teams to integrate innovative tools that streamline closings, improve collaboration and efficiency, enhance due diligence accuracy, and create measurable value for her clients.
In addition to her transactional work, Breanne actively tracks developments in deal terms, market trends, and regulatory changes shaping the M&A landscape. Breanne is a trusted advisor to clients on corporate governance, commercial contracting, commercial finance, and general corporate matters, often serving as outside general counsel to middle-market and growth-stage businesses. Her legal insight helps her clients balance speed, risk, and commercial priorities to effectively navigate their day-to-day operations and achieve their long-term strategic goals.
- JD, DePaul University College of Law
- BA, University of Michigan
- Illinois
- US District Court, Northern District of Illinois
- Illinois Supreme Court
Related Services
Related News & Insights
-
Sponsored Events
Oct 7, 2026
Seyfarth to Sponsor and Breanne Vaclavik to Speak at the 2026 ACG Chicago Midwest Capital Connection
-
Firm News
Aug 20, 2026
362 Seyfarth Attorneys Recognized in 2027 Best Lawyers Rankings; Five Awarded "Lawyer of the Year"
-
Legal Update
Aug 13, 2026
CTA Endgame: FinCEN Final Rule Closes the BOI Chapter for Most US Companies
-
Attorney Publication
Jun 10, 2026
Seyfarth and Chambers Release Third Healthcare M&A Guide (USA Chapter)
- Recognized as a "Ones to Watch" lawyer by Best Lawyers in America (Woodward/White Inc.) for Corporate Law and Mergers and Acquisitions Law (2026)
- Recognized for M&A: middle-market (sub-$500m) as a Next Generation Partner (2026); Leading Associate (2025); and Rising Star by Legal 500 (Legalese Ltd.) (2024)
- Named Emerging Leader by M&A Advisor (2026)
- Association of Corporate Growth (ACG) Member, Chicago Chapter
- American Bar Association Member (Section on Business Law; Young Lawyers Division)
- Co-Author, "2025 Healthcare M&A Guide (USA Chapter)," Chambers (June 3, 2025)
- Interviewee, "Expert Q&A: Effects of the Interim Final Rule on Corporate Transparency Act (CTA) Compliance," Practical Law (June 2, 2025)
- Co-Author, “FinCEN Reinstates BOI Reporting Under the Corporate Transparency Act,” Legal Update, Seyfarth Shaw LLP (February 19, 2025)
- Co-Author, “FinCEN Acknowledges Nationwide Preliminary Injunction on CTA Enforcement – Voluntary Submission Only,” Legal Update, Seyfath Shaw LLP (December 10, 2024)
- Co-Author, “Expert Q&A: Update on the Corporate Transparency Act (CTA),” Thomson Reuters’ Practical Law (November 15, 2024)
- Co-Author, "Upcoming Deadline for Corporate Transparency Act Compliance," Legal Update, Seyfarth Shaw LLP (November 20, 2024)
- Co-Author, “FinCEN's October 2024 Beneficial Ownership Information FAQ Update,” Legal Update, Seyfarth Shaw LLP (October 4, 2024)
- Contributing Author, Healthcare M&A 2024 Guide (USA Chapter) (June 18, 2024)
- Chapter Author, “Confidentiality and Nondisclosure Agreements in Mergers and Acquisitions,” in the 2023 edition of Business Law: Mergers and Acquisitions (November 1, 2023)
- Co-Author, "2023 Edition Business Law: Mergers and Acquisitions," Illinois Institute for Continuing Legal Education (October 2, 2023)
- Co-Author, Digital Health 2023, Seyfarth Shaw LLP (January 2023)
- Panelist, "Dealmakers Roundtable: An Unfiltered View of the Middle Market," ACG Chicago's 2026 Midwest Capital Connection conference, Chicago, IL (October 8, 2026)
- Co-Presenter, “CTA Compliance in 2025: What’s Changed & What’s Next,” Webinar, Seyfarth Shaw LLP (March 20, 2025)
- Co-Presenter, "Anatomy of an M&A Transaction," ACG Chicago's M&A Academy session (February 13, 2025)
- Co-Presenter, “Critical Information for Year-End CTA Compliance,” Webinar, Seyfarth Shaw LLP (October 24, 2024)
- Co-Presenter, "Health Care Beat Episode 36: US Digital Health Series – Transactional Issues," Podcast, Seyfarth Shaw LLP (April 26, 2023)
Breanne’s analytical ability, thoroughness and judgment is outstanding. It is actually quite impressive how calm and focused she remains under "deal pressure." —Client feedback