Top Contributors, 2008 Cycle (Obama)

https://www.opensecrets.org/pres08/contrib.php?cid=N00009638

"SNIP..........

Because of contribution limits, organizations that bundle together many individual contributions are often among the top donors to presidential candidates. These contributions can come from the organization's members or employees (and their families). The organization may support one candidate, or hedge its bets by supporting multiple candidates. Groups with national networks of donors - like EMILY's List and Club for Growth - make for particularly big bundlers.

University of California $1,799,460
Goldman Sachs $1,034,615
Harvard University $900,909
Microsoft Corp $854,717
JPMorgan Chase & Co $847,895
Google Inc $817,855
Citigroup Inc $755,057
US Government $638,335
Time Warner $617,844
Sidley Austin LLP $606,260
Stanford University $603,866
National Amusements Inc $579,098
Columbia University $570,839
Skadden, Arps et al $554,439
WilmerHale Llp $554,373
US Dept of Justice $540,636
IBM Corp $534,470
UBS AG $534,166
General Electric $532,031
Morgan Stanley $528,182

............SNIP"