Tantalus Systems Added to Nasdaq OMX Clean Edge Smart Grid Infrastructure Index and First Trust Smart Grid Infrastructure ETF (GRID)

Inclusion places Tantalus among the global companies advancing smart grid and electric infrastructure technologies

Burnaby, British Columbia--(Newsfile Corp. - September 24, 2026) - Tantalus Systems (TSX: GRID) (OTCQX: TGMPF) ("Tantalus" or the "Company"), a technology company dedicated to helping utilities modernize their distribution grids by harnessing the power of data, announced today that it has been added to the Nasdaq OMX Clean Edge Smart Grid Infrastructure™ Index (the "QGRD™ Index"), effective prior to market open on September 21, 2026, as part of the Index's September 2026 semi-annual reconstitution. With its inclusion in the QGRD Index, Tantalus is now a holding of the First Trust NASDAQ® Clean Edge® Smart Grid Infrastructure Index Fund (NASDAQ: GRID) (the "Fund"), an exchange-traded fund that tracks the QGRD Index and reported approximately US$12.1 billion in net assets as of September 22, 2026.