Open Secrets has the data here:
https://www.opensecrets.org/politicians/summary.php?cid=N00013345
These big donors include $39,150 from employees of Rubie's Costumes, $35,400 from employees of Amneal Pharmaceuticals, $25,600 from employees of Deloitte, and $23,800 from employees of the John P. Picone Company, a construction firm.
http://www.opensecrets.org/races/contrib.php?id=NY03&cycle=2014
Congressman Israel’s Republican opponent for the Third District seat, Grant Lally, has raised almost all of his money from individual donors, and needless to say has a lot less money than Israel:
http://www.opensecrets.org/races/geog.php?id=NY03&cycle=2014
There are some races around the country where the Republican has outraised and outspent a Democrat who depends upon small donors. New York’s Third Congressional District is not one of those races. This leaves Democrats in that District in a bad predicament if they really believe in government that is responsive to ordinary people.
For the rest of us, the broader issue is who is hurt by the campaign finance system. This district, whcih given its demographics could elect a Republican, presents clear evidence that the money does not favor one party or the other, but favors incumbents because incumbents can deliver the favors people want.