There's a lot of money in politics and Democratic nominee Hillary Clinton has raised remarkable amounts of it this election cycle. The total amount raised by the official campaign committee, the DNC, super PACs, PACs and joint fundraising committees, is nearing the $1 billion mark. (See also, Why Wall Street Won't Give Money to Trump's Campaign)

In six months, Clinton's official campaign committee Hillary for America has raised $460 million. However, since there is a cap on the amount an individual can contribute to a campaign directly, super PACs remain important to big donors. According to the Center for Responsive Politics, more than half the amount raised by Clinton and her allies this election cycle came from large individual contributions, versus only 15% of Donald Trump's campaign funds. (See also, Top 10 Donors to the Trump Campaign)

Priorities USA Action, the main pro-Clinton super PAC, has raised a total of $155 million. It raised almost $25 million in September, narrowly beating its August tally, making it the super PAC's best fundraising month yet. FEC filings released Thursday night show us who was driving the surge in donations.

The following are the biggest donors to Clinton's campaign:

1. Dustin Moskovitz and Cari Tuna: $35 million (including donations to non-partisan voter registration efforts)

Facebook (FB) co-founder Dustin Moskovitz and his wife Cari Tuna revealed their plans to support the Democrats with donations in two Medium posts, one in the first week of September and one in early October. They said, "Like many Democratic voters, we don’t support every plank of the platform, but it is clear that if Secretary Clinton wins the election, America will advance much further toward the world we hope to see. If Donald Trump wins, the country will fall backward, and become more isolated from the global community."

In September, Moskovitz said they gave a total of $20 million to pro-Clinton, pro-Democrat organizations including the Hillary Victory Fund, the DSCC, and the DCCC, the League of Conservation Voters (LCV) Victory Fund, For Our Future PAC, MoveOn.org Political Action, Color Of Change PAC and several nonpartisan voter registration efforts. In October, Moskovitz contributed $15 million to policy advocacy organizations, including the PUA super PAC, and $7 million to nonpartisan voter registration and get-out-the-vote efforts. He donated $2.5 million to the PUA super PAC in September and $5 million in October.

2. Donald Sussman, Paloma Partners: $21,100,000

The president of this Connecticut-based hedge fund donated $21 million to the PUA super PAC and $100,000 to the Correct the Record super PAC. Correct the Record collects money to pay for personnel whose job it is to defend Clinton online. Of the total figure, $2 million was given in October for which the filings haven't been released yet.

3. Jay Robert Pritzker and Mary Pritzker, Pritzker Group and Pritzker Family Foundation: $12,600,000

JB, the heir to the Hyatt Hotel fortune (H) and co-founder of an investment firm, donated to the PUA super PAC along with his wife. The Pritzker Family Foundation led by Jay Robert also donated to PUA super PAC.

4. Haim Saban and Cheryl Saban, Saban Capital Group: $10,000,000

Chairman of Univision Communications Haim Saban has been a long-time friend of Clinton, and his wife Cheryl sits on the board of the Clinton Foundation. Both donated separately to the PUA super PAC.

5. George Soros, Soros Fund Management: $9,525,000

The 85-year-old billionaire has been vocal about his disdain for Trump. He donated $9.5 million to the PUA super PAC and $25,000 to the Ready super PAC.

6. S. Daniel Abraham, SDA Enterprises: $9,000,000

The 91-year-old sold his weight loss brand Slim-Fast to Unilever for $2.3 billion in 2000. He advocates for a two-state solution for Israel and Palestine and is the founder of the S. Daniel Abraham Center for Middle East Peace. He donated to the PUA super PAC.

7. Fred Eychaner, Newsweb Corporation: $8,005,400

Eychaner is the founder and chairman of Newsweb, a Chicago media company.He donated to the PUA super PAC and Clinton's campaign committee.

8. James Simons, Euclidean Capital: $7,000,000

The billionaire hedge fund manager and mathematician donated to the PUA super PAC.

9. Henry Laufer and Marsha Laufer, Renaissance Technologies: $5,500,000

Henry is a director at Renaissance Technologies, an investment management firm founded by James Simon, #7 on this list. Marsha served as the chairwoman of Brookhaven Democratic Party. The Laufers donated to the PUA super PAC and Henry gave $500,000 to the Correct the Record Super PAC.

10. Laure Woods, Laurel Foundation: $5 million

Laure Woods is the president and founder of Laurel Foundation, a private foundation focused on the education, health and welfare of children

And Others

David E. Shaw, founder of D.E. Shaw & Co., donated $3 million to the PUA super PAC and $50,000 to the Ready super PAC.

The following have all given to the PUA super PAC: Herb Sandler, whose foundation has supported the Center for Responsible Lending, ProPublica and the Centre for American Progress, donated $3 million. Bernard L. Schwartz, chairman of BLS Investments and life-long supporter of the Democratic Party, donated $2.5 million. Chairman of Dreamworks New Media Jeffrey Katzenberg and director Steven Spielberg both donated $1 million each. Movie producer Thomas Tull, who was responsible for such hits as "The Hangover" and "300", has given $1.5 million. (See also: Democratic National Convention 2016 Donor's Names Released )

Corporations aren’t allowed to directly donate money to a candidate’s campaign committee. However, they can sponsor political action committees (PACS) or donate unlimited amounts to independent expenditure only committees (Super PACS). Individuals can donate a maximum of $2,700 (per election) to a candidate’s campaign committee and unlimited amounts to Super PACs. Super PACs cannot make contributions to candidates, parties or other PACs but can independently advocate for a certain candidate.

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