2. AFL-CIO: The nation's largest federation of labor unions, representing more than 12 million members. Its affiliates include the American Federation of State, County and Municipal Employees (AFSCME), American Federation of Teachers, and Communications Workers of America.
Donations: $2,306,372
Recipients:
American Bridge 21st Century, AFL-CIO Workers' Voices PAC

3. Service Employees International Union: Union representing more than 2 million healthcare and service workers.
Donations:
$1,945,000
Recipients:
Priorities USA Action, American Bridge 21st Century, Majority PAC, House Majority PAC, Rethink PAC

4. FreedomWorks: 501(c)4 arm of the tea party super-PAC chaired by former House Majority Leader Dick Armey. It does not have to disclose its donors.
Donations:
$1,336,779
Recipient:
FreedomWorks for America (own super-PAC)

5. Cooperative of American Physicians: Malpractice and medical liability insurer that gave to its eponymous super-PAC.
Donations:
$1,300,149
Recipient:
Cooperative of American Physicians

6. American Federation of State, County & Municipal Employees: AFL-CIO afilliated public employees' union with more than 1.6 million members.
Donations:
$1,200,000
Recipients:
American Bridge 21st Century, House Majority PAC, AFL-CIO Workers' Voices PAC, Women Vote!

7. Communications Workers of America: AFL-CIO afilliated telecommunications union with more than 700,000 members.
Donations:
$1,097,971
Recipients:
Communications Workers of America (own super-PAC), House Majority PAC, Independent Source, The American Worker

8. (tie) Eli Publishing, Inc.: Mysterious company based in Provo, Utah. Shares an address with F8 LLC.
Donations:
$1,000,000
Recipient:
Restore Our Future (pro-Romney super-PAC)

8. (tie) F8 LLC: Mysterious company based in Provo, Utah. Shares an address with Eli Publishing.
Donations:
$1,000,000
Recipient:
Restore Our Future

8. (tie) Melaluca: Idaho-based company that sells dietary supplements and "green" cleaning products via "independent marketing executives."
Donations:
$1,000,000
Recipient:
Restore Our Future

8. (tie) Rooney Holdings, Inc.: Oklahoma-based private investment firm. Its CEO, Francis Rooney, was the US Ambassador to the Vatican from 2005 to 2008.
Donations:
$1,000,000
Recipient:
Restore Our Future

8. (tie) W Spann LLC: Front company founded by Edward Conard, former managing director at Bain Capital.
Donations:
$1,000,000
Recipient:
Restore Our Future

8. (tie) Whiteco Industries: Privately owned Indiana company with subsidiaries in construction, hospitality, outdoor advertising, and real estate.
Donations: $1,000,000
Recipient:
American Crossroads

9. Crow Holdings: Investment firm that manages the family fortune of the late real estate magnate Trammel Crow. Harlan Crow is his son.
Donations:
$900,000
Recipients:
American Crossroads, Restore Our Future, FreedomWorks for America

10: Oxbow Carbon: Coal and oil company founded by William Koch, the brother of Charles and David Koch. It mines more than 5 million tons of coal annually.
Donations:
$750,000
Recipient:
Restore Our Future

11. American Federation of Teachers: AFL-CIO afilliated union with more 1.5 million members in education, health care, and public service.
Donations:
$700,000
Recipients:
AFL-CIO Workers' Voices PAC

12. (tie) MBF Family Investments: Private investment fund linked to Miguel Fernandez, the chairman of a Florida private-equity firm.
Donations:
$500,000
Recipient:
Restore Our Future

12. (tie) Unite Here Tip State & Local Fund: Outside spending group affiliated with Unite Here, an AFL-CIO afilliated labor union representing hotel, gaming, food service, and manufacturing workers.
Donations:
$500,000
Recipients:
AFL-CIO Workers' Voices PAC

13. National Education Association: Union representing more than 3.2 million public school teachers
Donations:
$484,151
Recipients:
NEA Advocacy Fund (own super-PAC), The American Worker

14. Alliance Management Holdings: Partnership that owns Alliance Resource Management, a coal company.
Donations:
$425,000
Recipients:
American Crossroads

Top 20 People* Giving to Super-PACs

*The non-corporate kind

1. Sheldon and Miriam Adelson: The Las Vegas casino magnate is worth $21.5 million, making him America's 8th-richest person. (The Adelsons' donations were made after the disclosure deadline for 2011.)
Donations: $10,000,000
Recipient:
Winning Our Future (pro-Gingrich)

2. Harold Simmons: Runs the metals, chemicals, and waste management corporation Contran. He's worth $9.3 billion.
Donations:
$5,600,000
Recipients:
American Crossroads, Winning Our Future, Americans for Rick Perry (now called Restoring Prosperity Fund)

3. Bob Perry: Head of Houston-based homebuilding empire. His net worth: $650 million.
Donations: $3,600,000
Recipients:
American Crossroads, Restore Our Future, Make Us Great Again (pro-Rick Perry).

4. (tied) Ed Conard: A former Bain Capital managing director, he's given $2 million to a pro-Romney super-PAC—half through a shady front company (see previous list) and half in his own name.
Donations:
$2,000,000
Recipient:
Restore Our Future

4. (tied) Jeffrey Katzenberg: DreamWorks Animation CEO and major Obama fundraiser.
Donations:
$2,000,000
Recipient:
Priorities USA Action (pro-Obama)

4. (tied) Jerry Perenchio: The former CEO of Spanish-language network Univision. He's worth $2.3 billion.
Donations:
$2,000,000
Recipient:
American Crossroads

5. Jon Huntsman Sr.: Salt Lake City businessman, philanthropist, and former Nixon administration official who boosted his son's ill-fated presidential bid.
Donations:
$1,887,040
Recipient:
Our Destinty PAC (pro-Huntsman super-PAC)

6. Robert Mercer: Co-CEO of the $15 billion hedge fund Renaissance Technologies
Donations: $1,100,000
Recipients:
Restore Our Future, Club for Growth

7. (tie) Paul and Sandra Edgerly: Paul serves as a managing director at Bain Capital.
Donations: $1,000,000
Recipient:
Restore Our Future

7. (tie) Amy Goldman: New York author—no additional information known.
Donations:
$1,000,000
Recipient:
Planned Parenthood Votes

7. (tie) John Paulson: Hedge fund tycoon who's America's 17th-richest person with a net worth of $15.5 billion.
Donations:
$1,000,000
Recipient:
Restore Our Future

7. (tie) Julian Robertson: Former hedge fund manager worth $2.4 billion.
Donations: $1,000,000
Recipient:
Restore Our Future

7. (tie) Robert Rowling: Worth $4.7 billion, Rowling owns TRT Holdings, whose assets include the Tana Exploration oil company.
Donations: $1,000,000
Recipient:
American Crossroads

7. (tie) Paul Singer: Hedge fund founder
Donations: $1,000,000
Recipient:
Restore Our Future

8. Fred Eychaner: Reclusive Chicago media mogul and major backer of liberal causes.
Donations: $950,000
Recipients:
Priorities USA Action, House Majority PAC, America Votes Action Fund

9. Peter Thiel: Venture capitalist (and Bilderberg Group member) who made $1.5 billion co-founding PayPal and investing in Facebook.
Donations: $900,000
Recipient:
Endorse Liberty (pro-Paul)

10. (tie) Philip Geier: Venture capitalist and former CEO of one of the world's largest advertising holding companies.
Donations: $750,000
Recipients:
American Crossroads, Restore Our Future

10. (tie) Chris Shumway: Hedge fund manager who retired last year at age 45.
Donations: $750,000
Recipient:
Restore Our Future

11. Kenny Troutt: Billionaire founder of Excel Communications.
Donations:
$700,000
Recipients:
American Crossroads, Make Us Great Again (pro-Perry)

12. John Templeton: Runs the John Templeton Foundation, a nonprofit started by his late father, a wildly successful investor.
Donations: $550,000
Recipients:
Red White and Blue Fund (pro-Santorum), Raising Red, and American Crossroads