Mineros Opens Short Insider Trading Window
Directors and managers of Mineros-listed companies face strict privilege conditions before trading shares during the offer period.
Updated on Nov. 6, 2026 in Public Companies
Mineros S.A., a Latin American gold miner headquartered in Medellin, Colombia, announced that its board authorized directors and management to buy or sell company shares in the market for seven calendar days, ending March 20, 2025. The authorization was granted in the context of the Amended Sun Valley Offer and applies to shareholders trading in Mineros stock on the Toronto and Colombia exchanges.
Why it matters
The board granted the authorization on March 13, 2025, under the condition that no board or management member held privileged information, and it was tied to the Amended Sun Valley Offer. For public companies, this illustrates how insider trading windows are narrowed and conditioned during active transactions, and why compliance with internal privileged-information policies is central to any such move.
The board authorization runs for seven calendar days, concluding Thursday, March 20, 2025, and was recorded in Board Minute No. 583 from the March 13 meeting. The source provides no comparison to prior authorization periods or trading volumes, so the scale of the window cannot be benchmarked from this filing alone.
The players
Mineros S.A.
A Latin American gold miner headquartered in Medellin, Colombia, operating mines in Colombia and Nicaragua and listed on the Toronto and Colombia stock exchanges.
The details
The board's authorization permits directors and management to trade Mineros shares only under strict conditions: each must confirm no privileged information is in their possession, and the trades must comply with Mineros' Policy on the Use of Privileged Information and applicable Colombian regulations. The authorization is linked to the Amended Sun Valley Offer, and the company stated that any decision to participate in that offer or to buy or sell shares remains at the discretion of individual directors and management.
Timeline
March 13, 2025: Board meeting grants the authorization, recorded as Minute No. 583.
March 14, 2025: Mineros announces the board authorization in a press release.
March 20, 2025: The seven-day authorization period concludes.
Market Landscape
Trading authorizations of this kind sit within the disclosure and insider-trading framework that Colombian law and Mineros' own policy establish for companies listed on the Colombia Stock Exchange. The authorization is tied to the Amended Sun Valley Offer, placing it in the context of an active transaction rather than routine trading.
Operators of publicly listed companies should review whether any internal trading authorizations involve privileged information and confirm that each insider's trades comply with their company's policy and local securities rules. Anyone considering a position in a company during a tender or takeover-style offer should consult qualified counsel or a securities professional before acting.
The takeaway
The key operating lesson is that trading permissions granted during an active offer carry strict conditions, including a written confirmation that no privileged information is held. Companies should track the expiration date of any such authorization and document compliance, and anyone affected should seek advice from qualified counsel or an accountant before trading.
Further reading
For more on how listed companies manage trading windows and disclosure during deals, see the Public Companies section.
