| Year | Awardee | Research Topic |
| 2023 | Laura Eme | Origin and genome evolution of eukaryotic microbes (a.k.a. protists) and archaea. |
| 2022 | Anastasios Tsaousis | The molecular interactions between Cryptosporidium and its host; the complexity of its life cycle |
| 2021 | Fabien Burki | Eukaryotic Tree of Life – diversity and evolution of microbial eukaryotes |
| 2020 | Vladimir Hampl | Diversity, molecular and cell biology of Preaxostyla, a protist group that has succeeded in eliminating mitochondria. |
| 2019 | Enrique Lara | Protist diversity patterns at the species level – the case of testate amoebae |
| 2018 | Micah Dunthorn | Equating OTUs With Species Diversity |
| 2017 | Tom Richards | |
| 2016 | Joel Dacks | Diversity of membrane-trafficking machinery |
| 2015 | Susanne Menden-Deuer | Roles of protists in the marine plankton |
| 2014 | Ross Waller | Evolution in Aveolates |
| 2013 | John Archibald | Origin and evolution of eukaryotes |
| 2012 | Alastair G. B. Simpson | Phylogeny and ultrastructure of excavate flagellates |
| 2011 | Virginia Edgcomb | Ecology and phylogeny of marine protists, especially ciliates |
| 2010 | Andrew Roger | Phylogeny of eukaryotes and genome evolution |
| 2009 | Laura Katz | Evolution of eukaryotic microbes |
| 2008 | ||
| 2007 | ||
| 2006 | Per Juel Hansen | Ecology of marine flagellates and ciliates, emphasizing mixotrophy |
| 2005 | Patrick Keeling | Lateral gene transfer and compact genomes |
| 2004 | ||
| 2003 | Burt Goldberg | Biochemistry and drug metabolism of anaerobic protozoa |
| 2002 | David A. Scott | Vacuolar pyrophosphatase of trypanosomes |
| 2001 | ||
| 2000 | Guan Zhu | Biochemistry and metabolism of apicomplexan parasites |
| 1999 | David Caron | Ecology of planktonic protists, particularly flagellates |
| 1998 | Jo Ann Burkholder | Pfeisteria and harmful algal blooms |
| 1997 | ||
| 1996 | Melanie T. Cushion | Pathobiology of Pneumocystis infection |
| 1995 | C. Graham Clark | Genetic diversity of intestinal protists |
| 1994 | Nigel Yarlett | Hydrogenosomes and anaerobic metabolism of protists |
| 1993 | ||
| 1992 | Carolyn L. Jahn | Genome rearrangements and development of hypotrich |
| 1991 | Diane K. Stoecker | Ecology of planktonic protists, especially ciliates |
| 1990 | Stephen F. Ng | Morphogenetic functions of the micronucleus of ciliates |
| 1989 | ||
| 1988 | Roberto Docampo | Trypanosomes and calcium metabolism |
| 1987 | Alan Fairlamb & Kwang-Poo Chang | Metabolism and functions of trypanothione & Biochemistry and cell biology of Leishmania |
| 1986 | Graham H. Coombs | Biochemistry of parasites, particularly Leishmania and Trichomonas |
| 1985 | John Mansfield | Host-parasite relationships of African trypanosomes |
| 1984 | Stephen Hajduk | Antigenic variation and kinetoplast DNA of African trypanosomes |
| 1983 | Cyrus J. Bacchi | Biochemistry and physiology of hemoflagellate protozoa |
| 1982 | Yoshinori Nozawa | Membrane biology of Tetrahymena |
| 1981 | Donald G. Lindmark | Metabolism of hydrogenosomes, particularly of Giardia |
| 1980 | Larry Simpson | Mitochondrial genome of kinetoplastids, particularly trypanosomes |
| 1979 | George C. Hill | Biochemistry and molecular biology of African trypanosomes |
| 1978 | Richard D. Allen | Ultrastructure and cell biology of ciliates, particularly organelles of Paramecium |
| 1977 | ||
| 1976 | Miklós Müller | Hydrogenosomes and anaerobic metabolism of protists |
