United States

Arnold & Porter announced today that Natalie Sinzig has joined the firm’s Intellectual Property & Technology practice as counsel in San Francisco.  Natalie is an accomplished IP litigator with significant experience leading high-stakes patent, trade secret, and copyright disputes across a broad range of technologies. Her practice spans complex matters involving AI and machine learning, medical devices, solar panels, wireless networks, radio frequency identification systems, semiconductors, batteries, and digital mobile radios. With over a decade of experience, Natalie has handled matters in both state and federal courts as well as before the Patent Trial and Appeal Board. She has successfully guided clients through all phases of litigation—from pre-suit investigations and discovery through trial strategy and post-trial proceedings—delivering favorable outcomes in high-value matters. She also publishes thought leadership on IP and cybersecurity matters impacting technology companies. Prior to joining Arnold & Porter, Natalie was a partner in the IP Litigation group at a top-ranked Am Law 100 firm, where she managed critical aspects of motion practice, witness preparation, expert strategy, and trial execution in complex technology disputes by translating highly technical subject matter into compelling courtroom narratives. Natalie earned her J.D. from the University of California, Berkeley, School of Law, where she received a Law & Technology Certificate. She also holds a B.A., magna cum laude, from the University of California, Berkeley.

SEATTLE, March 9, 2026 — Arnold & Porter announced today that Rhys Hefta, a lawyer with over 15 years of experience in Seattle, has joined the firm’s Real Estate practice as a partner, resident in Seattle. The firm’s Seattle office serves as a hub for regulatory, litigation, and transactional work across key practices, including real estate, as well as class actions, complex commercial litigation, corporate transactions, employment disputes, technology transactions and healthcare and hospital matters. With Rhys’ arrival, Arnold & Porter’s team in the heart of downtown Seattle has increased to 36 attorneys and staff since opening the office in July 2025. Building on this steady and purposeful growth, the firm expects to continue expanding its team in the region. Pallavi Mehta Wahi, Arnold & Porter Chair of Western U.S. Strategic Growth and head of the Seattle office, said: “Rhys is an excellent lawyer with deep experience and strong credentials. He has grown an impressive practice in real estate financing focused on sophisticated transactions for lender and borrower clients and is an analytical, thoughtful, strategic adviser. I am confident he will be instrumental in supporting our Real Estate team as we continue to grow on the West Coast and in Seattle.” Rhys has a broad real estate finance practice, advising clients across a range of real estate asset classes, including office, hospitality, retail, multifamily, industrial/logistics, and senior housing. He represents commercial real estate lenders – from life insurance companies to Wall Street investment banks and foreign financial institutions – and counsels them on loan originations, structuring, purchases and sales, securitizations, syndications, joint ventures, workouts, and restructurings. He regularly advises lenders on complex senior and subordinate financings, multi‑state portfolio deals, and transactions involving mezzanine debt and preferred equity. In addition, Rhys advises landlord and tenants on commercial leasing matters and assists owners in negotiating asset, property management, and franchise agreements. In joining the firm, Rhys said: “Arnold & Porter’s Real Estate group, which actively advises an array of clients on finance, agribusiness, joint venture, and development matters, is an excellent fit for my practice. I am pleased to be joining my new colleagues, both in Seattle and across the firm’s well-established real estate platform, and to be part of a regulatory platform of Arnold & Porter’s stature in Seattle.” Rhys holds a J.D. from Columbia Law School, where he was a Harlan Fiske Stone Scholar, and a B.A. from the University of Washington, cum laude. About Arnold & Porter Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues. With over 1,000 lawyers practicing in 16 offices worldwide, we offer an integrated approach that spans more than 40 practice areas. Through multidisciplinary collaboration and focused industry experience, we provide innovative and effective solutions to mitigate risks, address challenges, and achieve successful outcomes.

SEATTLE, March 9, 2026 — Arnold & Porter announced today that Rhys Hefta, a lawyer with over 15 years of experience in Seattle, has joined the firm’s Real Estate practice as a partner, resident in Seattle. The firm’s Seattle office serves as a hub for regulatory, litigation, and transactional work across key practices, including real estate, as well as class actions, complex commercial litigation, corporate transactions, employment disputes, technology transactions and healthcare and hospital matters. With Rhys’ arrival, Arnold & Porter’s team in the heart of downtown Seattle has increased to 36 attorneys and staff since opening the office in July 2025. Building on this steady and purposeful growth, the firm expects to continue expanding its team in the region. Pallavi Mehta Wahi, Arnold & Porter Chair of Western U.S. Strategic Growth and head of the Seattle office, said: “Rhys is an excellent lawyer with deep experience and strong credentials. He has grown an impressive practice in real estate financing focused on sophisticated transactions for lender and borrower clients and is an analytical, thoughtful, strategic adviser. I am confident he will be instrumental in supporting our Real Estate team as we continue to grow on the West Coast and in Seattle.” Rhys has a broad real estate finance practice, advising clients across a range of real estate asset classes, including office, hospitality, retail, multifamily, industrial/logistics, and senior housing. He represents commercial real estate lenders – from life insurance companies to Wall Street investment banks and foreign financial institutions – and counsels them on loan originations, structuring, purchases and sales, securitizations, syndications, joint ventures, workouts, and restructurings. He regularly advises lenders on complex senior and subordinate financings, multi‑state portfolio deals, and transactions involving mezzanine debt and preferred equity. In addition, Rhys advises landlord and tenants on commercial leasing matters and assists owners in negotiating asset, property management, and franchise agreements. In joining the firm, Rhys said: “Arnold & Porter’s Real Estate group, which actively advises an array of clients on finance, agribusiness, joint venture, and development matters, is an excellent fit for my practice. I am pleased to be joining my new colleagues, both in Seattle and across the firm’s well-established real estate platform, and to be part of a regulatory platform of Arnold & Porter’s stature in Seattle.” Rhys holds a J.D. from Columbia Law School, where he was a Harlan Fiske Stone Scholar, and a B.A. from the University of Washington, cum laude. About Arnold & Porter Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues. With over 1,000 lawyers practicing in 16 offices worldwide, we offer an integrated approach that spans more than 40 practice areas. Through multidisciplinary collaboration and focused industry experience, we provide innovative and effective solutions to mitigate risks, address challenges, and achieve successful outcomes.

NEW YORK and WASHINGTON, D.C., March 2, 2026 — Clients face increasing scrutiny and regulatory risk from state attorneys general (AGs), who have aggressively sought to fill the gap left by diminished federal enforcement. In recognition of the increased investigation and litigation activity by state AGs, Arnold & Porter has formed a dedicated State Attorneys General Investigations & Litigation Task Force, a multidisciplinary team led by former state and federal government prosecutors and enforcers that will advise and defend clients facing increasingly complex, high-stakes investigations and litigation involving state AGs. “For many years, we have helped clients stay ahead of the curve with strategic, proactive counsel that mitigates risk,” said Benjamin Mizer, former Acting Associate Attorney General at the U.S. Department of Justice. “This Task Force helps us coordinate our deep bench of litigators and regulatory attorneys with first-hand knowledge of some of the nation’s most active state AGs. Having been on both sides of the table, our team understands how state AGs think and what drives their decision-making. This group has the experience, relationships, and insight to help guide clients through these complex challenges and understands the nuances of state-level enforcement.” “Regulated entities increasingly find themselves facing conflicting enforcement demands, caught between federal and state authorities who take opposing views of compliance obligations,” added Meredith Osborn, former Chief Trial Deputy at the City Attorney’s Office for San Francisco. “Arnold & Porter has guided clients caught in these kinds of dilemmas, and today’s changing enforcement landscape is the perfect time to concentrate that expertise in a targeted State AG Task Force.” Arnold & Porter has a long history of success in single- and multi-state AG matters, often resolving investigations favorably and discreetly before they escalate, as well as aggressively litigating in state court when necessary. Having forged significant relationships with many state AGs, the group helps clients proactively identify issues, provide guidance to avoid inquiries and litigation, anticipate where investigators may focus their efforts, and devise effective, practical measures to limit our clients’ exposure. The Task Force will also monitor state regulatory and litigation developments to keep clients ahead of emerging enforcement trends nationwide. Collectively, the team brings decades of experience advising on government investigations and litigation across a broad swath of industries, including the pharmaceutical and healthcare, financial services, energy, consumer products, and many other industries. About Arnold & Porter Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues. With over 1,000 lawyers practicing in 16 offices worldwide, we offer an integrated approach that spans more than 40 practice areas. Through multidisciplinary collaboration and focused industry experience, we provide innovative and effective solutions to mitigate risks, address challenges, and achieve successful outcomes.