Mikkel Vislie

Darrell Windham is the managing member of the firm’s Austin office and has forty years of experience representing early stage companies, publicly traded and privately held clients, private equity funds and investors in complex mergers and acquisitions (M&A), strategic joint ventures, capital markets and other domestic and global business transactions. Darrell has experience in a wide variety of industries, including life sciences, medical devices, technology, software and semi-condu...

David M. Lange is a top attorney recognized by Best Lawyers in the practice area(s) of Mergers and Acquisitions Law. David M., who practices law in Dallas, Texas, has been recognized since 2025. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which David M. is held by other top lawyers in the same geographic and legal practice area.

Steve Levine practices in the area of litigation with a focus on environmental counseling. Mr. Levine has wide experience in environmental litigation arising from enforcement, toxic tort, and business-related claims, and as a significant part of these engagements, he works closely with experts in a variety of professional fields. He routinely interacts with the Environmental Protection Agency in several regions and state environmental regulatory agencies in several states in matters relating ...

Jonathan Ko is a partner in the Securities and Capital Markets practice and is based in the Los Angeles office. Mr. Ko represents private and public companies, investment banks, private equity firms and other institutional investors in a wide range of capital market transactions across various industries, including financial services, gaming, hospitality, real estate, retail and technology. These transactions include initial public offerings, follow on and secondary offerings, and public and ...

Sara, a shareholder at Walkup, prosecutes and serves as lead trial lawyer for severely injured individuals in cases involving defective products, transportation network companies like Uber and Lyft, aviation crashes, dangerous conditions of property, medical negligence, vehicular negligence, sexual assault, nursing home abuse, and other wrongdoing. When she isn’t representing clients, Sara is a lecturer at Stanford Law School, co-directing the Trial Advocacy course. She serves on the SF...

Michael A. Boldt is a top attorney recognized by Best Lawyers in the practice area(s) of Energy Law and Energy Regulatory Law. Michael A., who practices law in Austin, Texas, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Michael A. is held by other top lawyers in the same geographic and legal practice area.

John Cross is a corporate attorney and business adviser, often serving as the outside general counsel for companies not large enough to have an in-house legal department. He assists clients in general business and transactional matters, contracts, mergers and acquisitions, securities, franchises, and real estate. John works with individuals and businesses on various corporate and transactional matters, including formation, organization and choice of entities, shareholder agreements, LLC agree...

Area of Emphasis Marc Felezzola is a shareholder in Babst Calland’s Litigation and Environmental groups. Mr. Felezzola’s practice focuses on complex construction-related and environmental matters. On the construction side of his practice, Mr. Felezzola serves as outside general counsel for owners, developers, design professionals, and construction companies, and frequently represents them in a variety of commercial and construction-related disputes including construction bid prote...

James F. Herbison is a top attorney recognized by Best Lawyers in the practice area(s) of Antitrust Law and Litigation - Antitrust. James F., who practices law in Chicago, Illinois, has been recognized since 2019. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which James F. is held by other top lawyers in the same geographic and legal practice area.

Jeff Witt is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Jeff, who practices law in Washington, District of Columbia, has been recognized since 2024. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Jeff is held by other top lawyers in the same geographic and legal practice area.