In the Opportunities section of Reports, you can see a breakdown of all users who have updated Opportunities in the Opportunities Stats report.
When you open the Opportunities Stats report, you can filter the report by a specific date range.
After the date range filter, you can view the report. This report will allow you to view all users who have created Opportunities in the system, along with the total number of opportunities they have edited, total number they converted into Leads, total number of Disregarded opportunities, and the percentage of their opportunities that were disregarded.
From here you can filter sort by a specific criteria by clicking a column heading. You may also filter down based on any keyword by typing in the filter box. Clicking the Excel button will export the list into a spreadsheet.