UNIONBANK Union Bank of India Changes in credit ratings Announcement 2025 - Credit Rating Upgrade Union Bank of India has received an upgrade in its credit ratings by S&P Global Ratings from BBB-/Positive/A-3 to BBB/Stable/A-2 on August 14, 2025..Find Corporate Announcements for Press Releases, AGM, Insider Trading & SAST, Results and Corporate Action for Union Bank of India