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 focus on trade marks, branding and advertising law. This
includes obtaining injunctive relief to restrain competitor brand launches and advertising campaigns, over a
career spanning almost 25 years.
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. 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, Cantarella Bros (ORO coffee),
Pastificio Rana S.p.A (RANA pasta), PDP Fine Foods (WICKED SISTER Desserts), 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 is ranked as a Leading
Junior in the Legal 500 and has been recognised in the Doyles Guide for 2022, 2023, 2024, 2025 and 2026 as
recommended Junior Counsel Intellectual Property
Qualifications
- GDLP ANU 2001
- LLB UNSW 2000
- BA (Hons) USYD 1993