
Sonia Stewart
- Barrister, NSW 2016
- Solicitor, High Court of Australia 2002
- Solicitor, Supreme Court of NSW 2001
- PHONE +61 2 8066 6153
- EMAIL sonia.stewart@5wentworth.com
Overview
Sonia specialises in intellectual property law, with a strong focus on trade marks, branding and advertising. This includes obtaining injunctive relief to restrain competitor brand launches and advertising campaigns, over a career spanning more than two decades.
Admitted in 2001 and called to the Bar in 2016, Sonia was formerly a Senior Associate in the Intellectual Property & Dispute Resolution Group at Mallesons (now KWM). Sonia has also held senior in-house and executive roles for major brand owners of fast-moving consumer goods and in highly regulated industries. Sonia’s corporate experience enables her to advise clients in a concise and commercially relevant manner.
Sonia is commended by clients and solicitors for her collaborative approach to working and the tenacity and clarity of her advocacy. She appears regularly, both led and unled, in litigation at trial and appellate level, representing a variety of clients, including in challenging areas such as tobacco, alcohol, gambling, food & beverages and pharmaceuticals.
Sonia’s portfolio of clients includes global brands such as The a2 Milk Company, Pastificio Rana S.p.A (RANA pasta), PDP Fine Foods (WICKED SISTER Desserts), Cantarella Bros (ORO coffee), NPPA (PayID), Myriad Women’s Health (FORESIGHT Carrier Screening), NOVA Entertainment, Procter & Gamble, Juno Pharmaceuticals, ProductReview.com.au, Nestlé and Imperial Tobacco.
Sonia appears primarily in the Federal Court of Australia and before IP Australia. Sonia has been recognised in the Doyles Guide for 2022, 2023, 2024 and 2025 as recommended Junior Counsel Intellectual Property (New South Wales). Sonia also regularly presents at and chairs seminars on brands and trade marks.
Qualifications
- GDLP ANU 2001
- LLB UNSW 2000
- BA (Hons) USYD 1993