WTR 1000 – Silver Tier

(released 7th February 2023)

Castellanos & Co is acclaimed for its “quality of work, responsiveness and depth of knowledge”. (2023)

“The practitioners provide sound advice and adopt a no-nonsense approach to trademark matters.” (2023)

“As an outfit with decades of experience in the Colombian market, its multidisciplinary practitioners are well-trained to provide the full range of trademark services. “ (2023)

“CASTELLANOS earns effusive praise from clients, which is a testament to its quality” (2022)

“In response to any IP inquiry in Colombia, the firm provides thorough analyses and practical recommendations. The team is attentive to detail and takes care of everything speedily and promptly.” (2022)

Individual rankings (2023)

Ximena Castellanos – Silver

Margarita Castellanos – Silver

Chambers Latin America 2022 – Band 3

(released 26 August 2022)

“Castellanos & Co’s services are always stable, reliable, and of high quality. The lawyers provide good solutions considering their clients’ characteristics. For us, the speed of their responses is important and they perfectly meet this requirement.” (2022)

Notable practitioners

Margarita Castellanos is praised by interviewees, and one of them comments: “Margarita Castellanos is a very experienced IP lawyer that provides clients with innovative approaches to their problems in Colombia.” Another market commentator adds: “She is diligent, competent, knowledgeable, and friendly.” (2022)

Ximena Castellanos comes highly commended by interviewees for her well-established intellectual property practice in Colombia. One observer notes: “We have had a great experience working with Ximena Castellanos.” Another commentator affirms: “She is a very devoted lawyer.” (2022)

A market onlooker appreciates that the firm can provide “quick responses and answers that are thorough, practical, and understandable.” (2022)

Individual Rankings

Ximena Castellanos – Band 3                                                               

Margarita Castellanos – Band 3

Legal 500 Latin America 2022 – Tier 2

(released 19 October 2022)

IP boutique Castellanos & Co is noted for its ‘precise and fast‘ lawyers, who are ‘inventive and propose the best solutions‘.

The firm is primarily recognized for its focus on prosecution work —both in the patents and trademarks areas— as well as its strength in administrative litigation, particularly contentious work against the Patent and Trademark Office.

Practice head(s):

Ximena Castellanos; Margarita Castellanos


“An excellent IP practice. Lawyers know the subject, their answers are precise and fast, and their rates are reasonable.” (2022)

“Lawyers are very dedicated and proactively take care of the different queries and procedures.” (2022)

“Ximena Castellanos and Margarita Castellanos’ sector knowledge and relationships make their cases successful.” (2022)

IAM Patent 1000 2021 – Silver Tier

(29 June 2022)

IP boutique Castellanos & Co has cemented its presence on the IP scene with its “well-qualified team of professionals and extensive patent prosecution expertise”.

Heading up the patent side is Margarita Castellanos, who possesses profound knowledge of Colombian patenting processes but is equally dextrous when navigating the intricacies of international portfolios too.

Managing partner Ximena Castellanos brings formidable cross-border advocacy to the table. Her extensive international network of contacts has brought the outfit considerable work in delivering for foreign clients in Colombia, and 2021 saw 90 new entities enlist its services.

Castellanos is proud to be one of Colombia’s only female-owned law firms and this year sees María Guevara, a chemical engineer and expert patent filer, join the IAM Patent 1000. Maria is regularly called upon for her expert advice on patent feasibility and other biotechnology prosecution instructions.

Individual Rankings

Ximena Castellanos – Silver

Margarita Castellanos – Silver

María Guevara – Bronze