Mónica de Greiff resigns as ISA director and reshapes ISA stock governance

Published on 10/16/2026 at 00:07 | Editorial responsibility: Rafael Müller, Editor-in-Chief AD HOC NEWS

ISA's board change took effect October 12, 2026, after a March appointment. For ISA stock, an October 28, 2026 assembly is the next dated event.

Governance calendar takes shape

Mónica de Greiff's resignation took effect on October 12, 2026.
De Greiff joined the board in March 2026 for the 2026 to 2028 statutory term.
ISA scheduled a virtual extraordinary meeting for October 28, 2026.

ISA, COE15PA00026, Illustration mit AI erstellt.

Interconexion Electrica S.A. E.S.P. (COE15PA00026) lost board member Mónica de Greiff with effect from October 12, 2026, according to El Fondo. The resignation also ended her roles on ISA's Organizational Talent and Audit and Risk committees.

Governance change takes effect

El Fondo reported that De Greiff submitted her resignation on October 12, 2026, and that it took effect immediately. The filing described the departure as the first board change at the Ecopetrol subsidiary under President Abelardo de la Espriella.

Three dates define the sequence

Semana places De Greiff's appointment on March 27, 2026, when Ecopetrol nominated her to ISA's board for the 2026 to 2028 statutory period. The same report links the governance change to an extraordinary meeting scheduled for October 28, 2026.

What does October 28 decide?

Head Topics reported that ISA called a virtual extraordinary shareholder meeting for October 28, 2026, to address corporate matters following the board change. For investors, the calendar puts governance composition ahead of the next clearly dated corporate decision.

Utility structure remains central

ISA operates in the electricity infrastructure and transmission business, with Colombia as its home market. The company is identified as a utility and electricity supplier by Eulerpool. The board timeline therefore matters mainly as a governance development around a regulated infrastructure group.