The 2016 elections have seen a surge in contributions from “ghost corporations,” so-called because they are not functioning businesses or non-profits, and hence seem to exist solely to shield their owners’ identities.

Ghost corporations are a particularly dangerous and alarming new twist in campaign financing in the wake of the Supreme Court’s 2010 Citizens United decision. They make a mockery of one of the central claims of that decision: that “prompt disclosure” and “transparency” would allow U.S. democracy to survive the unlimited flood of money into elections from individuals, corporations and unions.

So exposing the real donors hiding behind ghost corporations is essential. And The Intercept has now determined the identity of the donor behind this cycle’s second-most generous ghost corporation, Children of Israel LLC. He is Saul Fox, a California private equity CEO.

Children of Israel LLC contributed $150,000 in 2015 to Pursuing America’s Greatness, a Super PAC supporting Mike Huckabee’s presidential run; $400,000 in 2016 to Stand for Truth, a Super PAC supporting Ted Cruz; and $334,000 to the Republican National Committee.

Fox’s motive in masking his identity is unknown. He did not respond to multiple requests for comment.

Fox’s funding of Children of Israel LLC can be pieced together via a close examination of corporate and FEC filings, specifically a twice-amended Republican National Committee year-end filing for 2015.

According to the Republican National Committee’s initial Jan. 31, 2016, filing with the FEC, Saul Fox personally gave the RNC the annual legal maximum of $334,000 on Dec. 10, 2015. (Congress recently crafted new rules that allow individuals to give $33,400 to national parties’ general accounts, and then $100,200 each to accounts for their headquarters, conventions and legal funds. There are therefore technically four separate donations.)

In that original filing, Fox’s address is listed as being on a street in Cupertino in Silicon Valley. This address is the same as the home address of Shaofen Gao — a realtor in Silicon Valley who, in filings with the state of California, is listed as the registered agent for Children of Israel LLC.

The RNC then amended that filing twice, most recently in May. The May filing has new information: it says for the first time that when the RNC received $334,000 on Dec. 10, 2015, the money came from Children of Israel. And the amended filing lists Fox, immediately after the Children of Israel entries — with the same transaction ID as the Children of Israel donations, with an “M” added at the end.

The “M” stands for “memo,” and signifies that the entry is not a separate donation but exists to provide additional information about the Children of Israel contribution. In this case, the entry’s additional information is that the contribution from Children of Israel is attributable in full to Saul Fox.