TORONTO, November 11, 2026 – Rosa Ventures Ltd. (“Rosa Ventures” or the “Company”), a Toronto-based junior copper exploration company focused on advancing porphyry copper-gold projects in the Andes, is pleased to announce that it has retained Grove Corporate Services Ltd. (“Grove”) to provide back-office corporate services and that Stephen Coates, Founder and CEO of Grove, has joined the Company’s Advisory Board as a Capital Markets Advisor.

Grove will provide a full suite of corporate administration, governance, regulatory compliance, accounting, and issuer support services. This engagement is intended to strengthen Rosa Ventures’ operational infrastructure as the Company advances its Chilean assets, including the San Lázaro and Polanco projects.

“As we scale our exploration activities in Chile, having a proven back-office partner is essential,” said Ned Nadima, CEO and Chairman of Rosa Ventures. “Grove’s deep experience with Canadian exchanges, regulators, and small-cap resource companies makes them an ideal fit. We are equally pleased to welcome Stephen Coates to our Advisory Board. His capital markets expertise and long track record in the junior mining sector will be a valuable asset as we execute our growth strategy.”

Stephen Coates brings more than 20 years of experience in capital markets, financial structuring, business development, and strategic communications across Canada, the United States, the United Kingdom, and Australia. He has founded and served as Chairman or CEO of several publicly listed companies and currently advises or serves as a director of multiple public and private small-cap companies, with a particular focus on the resource sector. He is the Founder and CEO of Grove Corporate Services and Principal of Grove Capital Group.

“Rosa Ventures has assembled an attractive portfolio of copper-gold projects in one of the world’s premier mining jurisdictions,” said Stephen Coates. “I look forward to supporting Ned and the team as they advance these assets.”

Technical Deep Dive

The Company will host a technical deep dive titled “Inside Rosa Ventures’ Exploration Strategy”, hosted by Red Cloud Media. The event will take place on January 21, 2027, from 1:00 PM to 2:00 PM. The session will cover the company’s project portfolio, the exploration strategy guiding its work, and the technical and operational foundations being established to support long-term growth.

About Rosa Ventures
Rosa Ventures is a Toronto-based junior exploration company actively advancing base metal projects in the highly prolific Andes region, with a primary focus on porphyry copper-gold opportunities in Chile. The Company is committed to unlocking significant value through disciplined exploration.

About Grove Corporate Services
Grove Corporate Services is a Toronto-based provider of corporate administration, governance, regulatory, accounting, and capital markets support services to private and public companies, with extensive experience serving small-cap and resource exploration issuers. Grove also operates AGM Connect and OTC Advisory Services.