The 2016 primaries were dominated by Hillary Clinton, while Bernie did get a large number of delegates.
Hillary Clinton-Nominee (2,766)
Bernie Sanders- Withdrew on 7/26/2016 (1,892)
Martin O' Malley- Withdrew on 2/1/2016 (1 superdelegate)
Lawrence Lessig- Withdrew on 11/2/2015
Lincoln Chafee- Withdrew on 10/23/2015
Jim Webb- Withdrew on 10/20/2015
The Progressive Party chose its candidate in a different way than the Democrats, Republicans, Libertarians, and Greens. Due to being founded three and a half months before the election, they decided to do a nationwide primary on August 15th with 1,500 delegates (all pledged) and then a convention from August 30th to September 2nd. All candidates could only withdraw during the convention.
Bernie Sanders-Nominee (986)
Lawrence Lessig-Withdrew on September 1st (148)
Keith Ellison-Withdrew on August 31st (147)
Jeff Merkley-(VP) Withdrew on August 31st (103)
Anthony Pollina- Withdrew on August 31st (51)
Ruben Gallego- Withdrew on August 30th (24)
The Moderate Republican party used the same system as the Progressive Party, except they had 900 delegates, and they had their nationwide primary on August 13th and their convention from September 3rd to September 7th.
John Kaisch-Nominee (468)
Paul Ryan- Withdrew on September 6th (301)
Jon Huntsman- Withdrew on September 5th (101)
Carly Fiorina- Withdrew on September 4th (21)
George Pataki-(VP) Withdrew on September 4th (11)