Lobbyists working on state legislation in California must file detailed quarterly reports with the California Secretary of State's Office.
Summary information from the reports and the reports themselves are available online at the Secretary's of State's Cal-Access site at:
You then can search by the name of an individual lobbyist or a lobbying firm to determine what companies or people the lobbying firm represents.
Or you can search by the name of a company or person to see what lobbyists they employ.
In both cases, you can access the detailed quarterly reports filed by the lobbyists that disclose the amount of money each company/person paid a lobbyist and the list of the legislative bills that were lobbied.
To access the reports, once you've done a search and retrieved a page with summary information on a particular lobbying firm or a lobbyist employer, click on the link toward the top for:
Financial Activity/Filing History
Scroll down and you'll information on what the lobbyists were paid or what legislation was lobbied.
For more detailed information, click on a link to one of the quarterly reports to call up the document in pdf format. For lobbyists these reports will list the specific legislation they lobbied.