- Centel refund/rate cut, 1986: $2,000,000
- Blocked Nicor Gas rate hike, secured refund, 1987: $40,000,000
- Peoples/North Shore Gas rate cut/refund, 1987: $27,000,000
- ComEd rate deal rejected, 1987: $1,320,000,000
- Overturned ComEd rate hike, 1987: $245,000,000
- Illinois Power rate deal blocked, 1988: $3,000,000,000
- ComEd rate deal overturned, 1989: $750,000,000
- ComEd rate case settlement, 1993: $1,679,000,000
- Ameritech rate cut, 1994: $465,000,000
- 10-year rate cut under electric restructuring law, 1997: $6,288,124,185
- ComEd customer assistance fund, 2000: $400,000
- CILCO refund, 2001: $20,400,000
- Ameritech merger savings settlement credit, 2002: $224,000,000
- Verizon merger savings settlement credit, 2003: $139,686,512
- Blocked ComEd/IP merger/rate-hike legislation, 2003: $2,000,000,000
- SBC voicemail class action settlement, 2004: $40,000,000
- Cut ComEd rate hike, 2005: $262,455,000
- Peoples Gas/Enron refund, 2006: $100,000,000
- Cut Peoples/North Shore Gas rate hike, 2007: $32,267,000
- Cut Ameren electric rate hike, 2007: $58,342,000
- Cut ComEd rate hike, 2007: $87,761,000
- Ameren/ComEd refunds after power auction abolished, 2007: $1,001,000,000
- Cut Nicor Gas rate hike,2008: $72,237,000
- Cut Ameren gas/electric rate hike, 2009: $118,618,000
- Cut Peoples/North Shore Gas rate hike, 2009: $58,717,000
- Cut ComEd rate hike, 2010: $218,793,000
- Illinois Power Agency procurement savings, 2009-11: $1,639,663,226
- Cut Peoples/North Shore Gas rate hike, 2011: $61,504,000
- Cut Peoples/North Shore Gas rate hike, 2012: $40,920,000
- Nicor Gas refund, 2013: $72,149,519
Total savings: $20.065 billion
