WTR 1000 2023 – Silver Tier


Silver – Firms

“One of the best law firms in Colombia for IP matters, we have worked with Castellanos & Co for years and are very pleased with the professionalism and commitment with which they handle our trademark matters.” The all-star duo Margarita Castellanos and Ximena Castellanos lead the prosecution-focused powerhouse and have a combined 45 years of experience. In addition to supporting on portfolio management tasks, they are skilled in administrative litigation. The high level of skill associated with the team attracts patrons who are seeking precision in the resolution of their trademark issues.

Individual rankings (2024)

Ximena Castellanos – Silver

Margarita Castellanos – Silver

Chambers Latin America 2024 – Band 3

(released august 24, 2023)

Castellanos & Co 

What the team is known for Castellanos & Co is an active intellectual property practice group in Colombia that is known to provide counsel on patent and trade mark registrations, as well as opposition, nullity proceedings and infringement cases. Castellanos & Co is frequently retained by players from the fashion, biotechnology and pharmaceutical industries. 


“Castellanos & Co’s team can handle all type of trademark matters, and provide solutions for its clients’ issues. They offer well-rounded responses with strategy.” 

Work highlights 

Castellanos & Co assisted Alibaba Group in its successful application for the registration of its trade mark ALI. 

Notable practitioners 

Well-regarded partner Margarita Castellanos leads the patent practice of Castellanos & Co’s intellectual property department. She enjoys experience advising clients on both patent and trade mark prosecutions in the Colombian market. 

Strengths: “She has been fantastic and able to provide advice throughout the process of patent prosecution. She has been very prompt in responding to questions and providing deep analysis of the particular rejections.” 

Head of department and managing partner Ximena Castellanos maintains a well-established intellectual property practice in Colombia. She regularly represents clients in trade mark registrations and oppositions as well as management of trade mark portfolios. Strengths: “Ximena Castellanos is very experienced and provides sophisticated strategies and recommendations to clients. She does not spare words or time in providing with the best advice possible.”

Legal 500 Latin America 2024 – Tier 2

A specialised boutique with a high quality of professionals’, Castellanos & Co’s focus on trade mark and patent prosecution pays dividends and the group is routinely engaged by multinational clients. The team additionally enjoys strong international law firm relationships and is often a first port of call for major global firms looking for local support on search and opinion work and administrative litigation. Managing partner Ximena Castellanos heads the trade mark practice and is equipped to advise on registrations, oppositions and other portfolio management issues. Margarita Castellanos fronts the patent department and is also a key contact for trade mark matters.

Practice head(s):

Ximena Castellanos; Margarita Castellanos


‘A specialised boutique with a high quality of professionals, knowledgeable about the subject and the industry. We appreciate its prompt attention, clear billing and easy collaboration.’

‘The team knows the industry and the subject well. It is very reliable. Ximena and Margarita Castellanos successfully run the firm.’

‘For me, the best thing about this team when compared to others is its ability to provide complete and prompt responses, particularly Margarita and Ximena Castellanos.’

Work highlights

  •     Represented Brazil-headquartered Dexco, which recently changed its name from Duratex, in overcoming significant obstacles to register the “DEXCO” wordmark.
  •     Represented Saint-Gobain Glass in a patent application relating to a method for producing coloured laminated glazing.
  •     Handled the successful enforcement of Rihanna’s “FENTY BEAUTY” mark against a highly similar application for identical goods.

IAM Patent 1000 2023 – Silver Tier

(released 2024)


Silver – Firms

Due to the firm’s high level of specialisation in the life sciences industry, Castellanos & Co’s persuasive arguments have successfully achieved patent protection for GC Aesthetics Ltd’s new medical device. Instrumental in this case was the skilful Margarita Castellanos, who leads as the head of patents. Margarita wields over 20 years of experience in the registration of patents, as such, she has an in-depth knowledge of Colombian IP laws. Managing partner Ximena Castellanos boasts a varied international experience and multilingual abilities. Finally, María Guevara is an adept patent prosecutor; she combines this skill with her background in chemical engineering to provide patent advisory services on complex biotechnological matters.


Recommended Individuals

Margarita Castellanos


Ximena Castellanos


María Guevara