| Peter O'Brien | $7,000 | Dec 30, 2025 | Friends of Mike Quigley | President |
| Peter O'Brien | $7,000 | Dec 30, 2025 | Friends of Mike Quigley | President |
| Peter O'Brien | $1,033 | Dec 9, 2025 | Preckwinkle for President | Real Estate Management |
| Peter O'Brien | $1,033 | Dec 9, 2025 | Preckwinkle for President | Real Estate Management |
| Peter O'Brien | $1,000 | Mar 24, 2025 | Friends of Raymond A Lopez | President |
| Peter O'Brien | $1,000 | Mar 24, 2025 | Friends of Raymond A Lopez | President |
| Peter O'Brien | $6,900 | Dec 30, 2023 | Citizens for Giannoulias | Owner |
| Peter O'Brien | $6,900 | Dec 30, 2023 | Citizens for Giannoulias | Owner |
| Peter J O'Brien | $6,900 | Nov 17, 2023 | Joy for Justice, Inc. | President |
| Peter J O'Brien | $6,900 | Nov 17, 2023 | Joy for Justice, Inc. | President |
| Peter J O'Brien | $6,900 | Nov 17, 2023 | Joy for Justice, Inc. | President |
| Peter O'Brien | $1,500 | Dec 21, 2022 | Neighbors for Brian Comer | President |
| Peter O'Brien | $1,500 | Dec 21, 2022 | Neighbors for Brian Comer | President |
| Peter O'Brien | $1,500 | Dec 21, 2022 | Neighbors for Brian Comer | President |
| Peter O'Brien | $6,000 | Oct 21, 2022 | Friends of Kimberly Walz | Owner |
| Peter O'Brien | $6,000 | Oct 21, 2022 | Friends of Kimberly Walz | Owner |
| Peter O'Brien | $6,000 | Oct 14, 2022 | Friends of Paul Struebing | Owner |
| Peter O'Brien | $6,000 | Oct 14, 2022 | Friends of Paul Struebing | Owner |
| Peter O'Brien | $6,000 | Jul 26, 2022 | Citizens for Giannoulias | Owner |
| Peter O'Brien | $6,000 | Jul 26, 2022 | Citizens for Giannoulias | Owner |
| Peter O'Brien | $6,000 | Mar 31, 2021 | Citizens for Giannoulias | Owner |
| Peter O'Brien | $6,000 | Mar 31, 2021 | Citizens for Giannoulias | Owner |
| Peter J O'Brien, Sr | $1,500 | Feb 27, 2015 | Citizens for Danny Solis | Real Estate |
| Peter J O'Brien, Sr | $1,500 | Feb 27, 2015 | Citizens for Danny Solis | Real Estate |
| Peter J O'Brien, Sr | $1,500 | Feb 27, 2015 | Citizens for Danny Solis | Real Estate |
| Peter J O'Brien, Sr | $1,500 | Feb 27, 2015 | Citizens for Danny Solis | Real Estate |
| Peter J O'Brien, Sr | $1,500 | Feb 26, 2015 | Friends of Margaret Laurino | Owner |
| Peter J O'Brien, Sr | $1,500 | Feb 26, 2015 | Friends of Margaret Laurino | Owner |
| Peter O'Brien | $1,500 | Feb 24, 2015 | Friends for Mary O'Connor | Real Estate Management |
| Peter O'Brien | $1,500 | Feb 24, 2015 | Friends for Mary O'Connor | Real Estate Management |
| Peter J O'Brien, Sr | $1,500 | Feb 23, 2015 | Citizens to Elect Emma Mitts | Owner |
| Peter J. O'Brien, Sr. | $1,500 | Feb 20, 2015 | Friends of Glenda Franklin | Owner |
| Peter J. O'Brien, Sr. | $1,500 | Feb 20, 2015 | Friends of Glenda Franklin | Owner |
| Peter J. O'Brien, Sr. | $1,500 | Feb 20, 2015 | Friends of Glenda Franklin | Owner |
| Peter O'Brien | $2,500 | Nov 7, 2014 | Friends for Mary O'Connor | Real Estate Management |
| Peter O'Brien | $2,500 | Nov 7, 2014 | Friends for Mary O'Connor | Real Estate Management |
| Peter O'Brien | $1,000 | Jun 28, 2014 | Citizens for Bridget Gainer | Owner |
| Peter O'Brien | $1,000 | Jun 28, 2014 | Citizens for Bridget Gainer | Owner |
“the ward with no alderman”