| CALIFORNIANS FOR INNOVATION | $692K | 30 | 2014, 2016 |
| CALIFORNIA DEMOCRATIC PARTY | $218K | 17 | 2002, 2014, 2016, 2000 |
| DCCC | $133K | 117 | 2010, 2002, 2014, 2006, 2004, 2012, 2008, 2000 |
| INTERNATIONAL BROTHERHOOD OF ELECTRICAL WORKERS POLITICAL ACTION COMMITTEE | $87K | 35 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN ASSOCIATION FOR JUSTICE POLITICAL ACTION COMMITTEE (AAJ PAC) | $83K | 47 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| MACHINISTS NON PARTISAN POLITICAL LEAGUE OF THE INTERNATIONAL ASSOCIATION OF MACHINISTS & AEROSPACE WORKERS | $72K | 19 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| AMERICAN FEDERATION OF TEACHERS, AFL-CIO COMMITTEE ON POLITICAL EDUCATION | $70K | 28 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| SEIU COPE (SERVICE EMPLOYEES INTERNATIONAL UNION COMMITTEE ON POLITICAL EDUCATION) | $70K | 20 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| NATIONAL ASSOCIATION OF REALTORS POLITICAL ACTION COMMITTEE | $68K | 35 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |
| D.R.I.V.E. - DEMOCRAT, REPUBLICAN, INDEPENDENT VOTER EDUCATION (THE PAC OF THE INTERNATIONAL BROTHERHOOD OF TEAMSTERS) | $66K | 25 | 2010, 2002, 2014, 2006, 2016, 2004, 2012, 2008, 2000 |