Sean Eldridge, a Hudson Valley investor and political activist who is mulling a potential challenge next year to GOP Rep. Chris Gibson, has raised $311,215 over the past three months, according to a report filed with the FEC.

During that same period, Eldridge spent $31,517. (His expenses include $10,000 to KnickerbockerSKD, which has been handling the press for his unofficial campaign). He has $279,607 on hand.

“We’re grateful for the strong support and interest Sean is receiving as he considers a congressional bid,” Knickerbocker’s Mike Morey told me this afternoon.

The report covers a three-month period from January 1 to March 31.

A source close to Eldridge confirmed in early February that he was eyeing a possible run for Congress, and later that some month, Eldridge and his husband, Facebook co-founder Chris Hughes, reportedly purchased a $2 million home in Gibson’s district. (NY-19).

UPDATE: I’m told Eldridge and Hughes purchased their new home in January – before reports of Eldrirdge’s potential congressional run started to leak out.

Hughes maxed out ($5,200 – $2,600 each for primary and general) to Eldridge’s committee, but so far, the wealthy couple has not put a substantial amount of cash behind this endeavor – something that generally occurs in the form of a loan with potential self-funders.

There are a number of contributors of note in Eldridge’s filing, including Tim Gill, a prominent gay rights activist and donor ($1,500); and John Barabino ($2,600), who is a member of the Gill Foundation Board of Directors; and attorney and gay rights advocate Evan Wolfson ($1,000).

Also of note: George Soros gave $1,500, Jennifer Soros $2,600 and Jonathan Soros $2,600. Jonathan Soros (Friends of Democracy) and Eldridge (Protect Out Democracy) are both investing in a push by well-heeled New York Democrats to establish a publicly funded campaign finance system in New York. Both groups spent heavily in last year’s tight Senate race that was ultimately won by Democratic Sen. Cecilia Tkaczyk.

Eldridge so far hasn’t formally announced he’s running, but this strong fund-raising show increases the likelihood he’ll ultimately throw his hat into the ring. (At the end of December 2012, Gibson had $15,016 on hand and just over $1,000 worth of debt).

Eldridge Q1 FEC Report by liz_benjamin6490