The highly controversial Proposition 8 passed in California with 52.1% of the vote (~ 6.45/12.39 million votes).
There were many campaign contributions both for and against Proposition 8, as would be expected in any large charged campaign. However, Proposition 8 is a different case. According to Wikipedia, The campaigns for and against Proposition 8 raised $35.8 million and $37.6 million, respectively, becoming the highest-funded campaign on any state ballot that day and surpassing every campaign in the country in spending except the presidential contest. The list of donors includes people from all sorts of local businesses and organizations (restaurants, school organizations, public servants/state employees) and all sorts of positions ranging from unknown "employees" to admins. There are also a lot of residents who are involved with or own businesses elsewhere, such as in Sacramento and the surrounding area, which were not included below.
Using the database provided by the Los Angeles Times, available here, donations from "Davis, CA 95616" found 224 total donors who contributed $100 or more. (That seemed to automatically include area code 95617 and 95618. However, searching for those specifically returned 222 and 225 donors.)
—54 donations supporting Prop 8, totaling: $22,417.00 (~$415 per donor).
—170 donations opposing Prop 8, totaling: $42,111.00 (~$218 per donor).
Owners of a Davis Business that donated to Yes on 8:
Mr. Wiscombe of Wiscombe's Davis Funeral Chapel. ($200)
Mr. Purves and Mr. Purves of Purves and Associates. ($250 and $250)
Owners of a Davis Business that donated to No on 8: