| Oklahoma Assoication of Career and Technology Education PAC (Okacte Pac) | Q | OK |
| Oklahoma Bankers Association Federal Public Affairs Committee | Q | OK |
| Oklahoma Community Action Program - Political Action Committee INC | Q | OK |
| Oklahoma Conservative Alliance | O | CA |
| Oklahoma Democratic Party | Y | OK |
| Oklahoma for Brandon | H | OK |
| Oklahoma Grocers Association Political Action Committee | N | OK |
| Oklahoma Leadership Council | Y | OK |
| Oklahoma Libertarian Party | X | OK |
| Oklahomans for Law and Order | O | VA |
| Oklahomans for Madison | S | OK |
| Oklahomans for Nuttle INC | H | OK |
| Oklahomans for Truth, Responsibility, Unity, Markets, & Prosperity PAC | O | OK |
| Oklahomans for Tyler | S | OK |
| Oklahoma Senate Republican Nominee Fund - Jim Inhofe | S | TX |
| Oklahoma Strong | N | VA |
| Oklahoma Values PAC | O | VA |
| Oklahoma Victory Committee | O | WI |
| Oklahoma Victory Committee | O | KY |
| Okpa for Congress | H | TX |
| Ok Senate Republican Nominee Fund 2022 | N | VA |
| Ok Senate Victory Fund | N | OK |
| Oktibbeha County | X | MS |
| Ola for Congress | H | NY |
| Old Breed PAC | N | WI |
| Old Breed PAC, INC. | N | GA |
| Old Dominion Freight Line INC. Political Action Committee (Old Dominion Pac) | Q | NC |
| Old Drum Conservative PAC | O | MO |
| Old Glory Super PAC | O | OH |
| Old Line Leadership PAC | O | MD |
| Old Line PAC | O | TX |
| Old National Bank PAC | Q | IN |
| Old North PAC | O | TX |
| Old North State PAC | N | NC |
| Old Willis for US Senate Committee | S | MI |
| Oleary for Congress | H | IA |
| Ole' Savior/O Savior US President Candidate 2020 Democrat | P | MN |
| Olin Corporation Good Government Fund | Q | MO |
| Oliva for Congress | H | NY |
| Olive Ai INC. Civic Action Fund | N | OH |
| Oliver Rosenberg for Congress | H | NY |
| Olivia for Congress | H | NJ |
| Olivia Winsteard for the House of Representatives 2020 | H | OH |
| Olivier for President | P | CA |
| Olkowski | P | AZ |
| Olmack for the People | H | VA |
| Olmack for US Congress | H | VA |
| Olsen 4 Congress | H | AZ |
| Olsen for Congress | H | TN |
| Olson for Congress Committee | H | TX |
| Olson for Oklahoma | H | OK |
| Olson Victory Fund | N | TX |
| Olsson Frank Weeda Terman Matz PC PAC | N | DC |
| Olsson INC PAC | Q | NE |
| Olympia Dsa | I | WA |
| Olympic Steel INC Political Action Committee | N | OH |
| O'Malley for President | P | DC |
| Om Alone PAC | O | TX |
| Omar2020 | H | FL |
| Omar Boulos for President | U | NC |
| Omari Faulkner for Virginia | S | VA |
| Omari Hardy for Congress | H | FL |
| Omar in the House | H | CA |
| Omar Kadir Por Tejas | H | TX |
| Omar Navarro for Congress | H | CA |
| Omar Qudrat for Congress | H | CA |
| Omar Vaid for Congress | H | NY |
| Omega Protein INC. PAC | Q | TX |
| O'Melveny & Myers Political Action Committee | Q | DC |
| Omeria Scott for US Senate | S | MS |
| Omnova Solutions INC Political Action Committee (Opac) | Q | OH |
| Omolola Olabode Turner | P | TX |
| Once Again | N | MD |
| Once You Go Black Political Action Committee | N | CO |
| Oncor Political Action Committee of Oncor Electric Delivery Administration Corp. | Q | TX |
| Onder for Congress | H | MO |
| Onder Victory Fund | N | WI |
| Ondraus for Congress | H | WA |
| One America | O | CT |
| One America | N | CA |
| Oneamerica | I | WA |
| Oneamerica Financial Partners, INC. PAC | Q | IN |
| One America, INC. | O | GA |
| One American Perception | V | PA |
| One America Strong PAC | N | SC |
| Oneamerica Votes | I | WA |
| Oneamerica Votes Justice for All Fund | V | WA |
| One Apia Nevada | I | NV |
| One Apia Nevada PAC | I | NV |
| One Apia PAC | O | NV |
| One By One | N | DC |
| One Chance Initiative | O | NV |
| One Community PAC | V | TX |
| One Country Fund | O | DC |
| One Country, One Destiny PAC | N | OH |
| One for All Committee | O | DC |
| One Future Fund | N | DC |
| One Gas, INC. Political Action Committee | Q | OK |
| One Generation | Q | CO |
| One Georgia PAC | Q | GA |
| One Giant Leap PAC | O | VA |
| One Human Race 2020 | X | OH |
| O'Neill and Associates PAC | Q | MA |
| One Level Higher | O | TX |
| One Love Unites | P | CA |
| Onemain Holdings INC. PAC | Q | IN |
| One More Time PAC | V | DC |
| One Nation | I | VA |
| One Nation Foundation | S | FL |
| One Nation PAC | W | VA |
| One Nation Under God (501-C3) | E | IL |
| One Nation Under God Foundation (501c3) | E | IL |
| One Nation United | O | CA |
| One New Jersey United | O | NJ |
| Oneok INC. Employee Political Action Committee | Q | OK |
| One PAC | N | CT |
| Onepacusa | O | FL |
| One Party | X | CA |
| One Paw | P | MI |
| One People'S Campaign | I | IL |
| One People United Super PAC | U | CA |
| One Pittsburgh | I | PA |
| One Seat for Liberty...Skelton for Congress | H | WA |
| One Talahassee | I | FL |
| Onetoughsheriff | O | VA |
| One Virginia Fund | N | VA |
| O.N.E. Voice | N | OK |
| One Voice | Q | DC |
| One Vote At A Time | O | CA |
| One Vote At A Time Victory Fund | N | CA |
| Online Fundraising PAC | V | DC |
| Online Lenders Alliance Political Action Committee (Ola Pac) | Q | DC |
| Only If You Run | N | MA |
| Only the Truth PAC Org LLC | O | FL |
| on My Road to the White House the Committee to Elect Vanessa McGee-Smithkearney for Presid | P | NC |
| Onondaga County Democratic Committee | X | NY |
| Onondaga County Democratic Committee 2022 | N | NY |
| Onslow County Republican Men'S Club | I | NC |
| Onteora Parents Engaged Now | N | NY |
| on the Move PAC | N | DC |
| Onward America | O | DC |
| Onward Kentucky | O | KY |
| Onward Ohio | O | KY |
| Onward PAC | N | VA |
| Onward Political Action Committee | N | IL |
| Onward Sc | O | SC |
| Onward Together Committee | Q | NY |
| on Wisconsin PAC, INC. | Q | WI |
| Oorah! Political Action Committee | Q | IN |
| O PAC | N | MD |
| Opeiu Local 153 "Vote" (Voice of the Electorate) Committee | Q | NY |
| Open America PAC | O | DC |
| Open Democracy PAC | V | DC |
| Open New York | I | NY |
| Open Progress | I | CA |
| Opensourcemt | O | MT |
| Open Streets PAC | N | CA |
| Operating Engineers Local 478 Political Action Committee (Oe478pac) | Q | CT |
| Operating Engineers Local # 649 Political Action Committee | Q | IL |
| Operating Engineers Local 98 Pol Action Committee - Social Action Fund | Q | MA |
| Operation 147 | O | DC |
| Operation Bullyproof | O | FL |
| Operation Frederick Douglass | O | DE |
| Operation Restore INC | O | TX |
| Operation Restore Military Honor and Valor, INC. | O | IL |
| Operation Saving Democracy | O | KY |
| Opiod Crisis | H | CT |
| Opioid Crisis | H | CT |
| Opn Victory PAC | N | GA |
| Opowu | P | AL |
| Oppenheimerfunds, INC. Political Action Committee | Q | GA |
| Oppo PAC | O | IL |
| Opportunity and Responsibility Restored in Our Nation PAC | Q | UT |
| Opportunity Financial, LLC Credit Access PAC | N | IL |
| Opportunity First | Q | TX |
| Opportunity for All Action Fund | I | DC |
| Opportunity for Tomorrow | O | AZ |
| Opportunity for Virginians PAC | O | VA |
| Opportunity Matters Fund Action | O | VA |
| Opportunity Matters Fund, INC. | O | MA |
| Opportunity Ny | O | NY |
| Opportunity PAC - A Coalition of Teachers Health Care Givers Faculty Members School Employees and Public and Pr | I | CA |
| Optimum Logistics Corp PAC | N | TN |
| Option Care Health INC. PAC | Q | IL |
| Optiver Americas LLC PAC (Optiver Pac) | N | IL |
| Or-04 Republican Nominee Fund 2022 | N | VA |
| Or-05 Republican Nominee Fund 2022 | N | VA |
| Oracle America, INC. Political Action Committee (Oracle Pac) | Q | DC |
| Oram for Congress | H | FL |
| Orange Coast Huddle | N | CA |
| Orange County PAC | O | CA |
| Orange County Republican Executive Committee | Y | FL |
| Orange County Veterans Democratic Club | N | CA |
| Orange County Victory Fund | Q | CA |
| Orange County Young Democrats Federal | U | CA |
| Orano PAC | N | MD |
| Oray Auzenne for Congress | H | CA |
| Orbis Technologies Federal PAC | N | DC |
| Ord2 Indivisible Action Fund | O | OR |
| Order of the Dracul | X | CA |