** Shares of U.S. utility NiSource NI.N up 2.6% at $49 premarket as Big Tech firms seek reliable, cleaner energy sources to power data centres, driven by AI usage
** Co announced on Thursday it signed a long-term energy supply deal with an Alphabet GOOGL.O unit and expanded its agreement with Amazon AMZN.O
** Under deal with Alphabet unit, NI to supply power to support large data center in Indiana from summer 2026
** NI expanded agreement with Amazon to speed up power delivery to its sites and bring forward bill credits for households
** Co's GenCo model for large customers aims to deliver system-wide savings of ~$1.25 bln, or $90-$115 a year per household, shielding existing customers from added costs
** As of last close, NI stock up 14.2% YTD
(Reporting by Tharuniyaa Lakshmi in Bengaluru)
((tharuniyaa@thomsonreuters.com))