| American Antiquarian Society | Independent Research Libraries - Matching Endowment in Support of Core Functions | 04/04/92 | $1,500,000 | Worcester, MA, United States | Public Knowledge |
| LYRASIS | Establishing Organizational Home for CollectionSpace | 12/05/13 | $1,500,000 | Atlanta, GA, United States | Public Knowledge |
| University of Michigan | JSTOR - Journal Storage Project | 12/12/94 | $1,500,000 | Ann Arbor, MI, United States | Public Knowledge |
| The Book Arts Press, Inc. | The Andrew W. Mellon Fellowship for Diversity, Inclusion & Cultural Heritage | 06/06/19 | $1,500,000 | Charlottesville, VA, United States | Public Knowledge |
| Henry E. Huntington Library & Art Gallery | Independent Research Libraries Program | 04/04/92 | $1,500,000 | San Marino, CA, United States | Public Knowledge |
| University of Virginia | Preservation Program | 03/14/08 | $1,500,000 | Charlottesville, VA, United States | Public Knowledge |
| Modern Language Association of America | MLA International Bibliography | 06/18/99 | $1,500,000 | New York, NY, United States | Public Knowledge |
| Council on Library and Information Resources | Operational Support | 06/04/15 | $1,500,000 | Washington, DC, United States | Public Knowledge |
| Council on Library and Information Resources | Operational Support II | 06/01/17 | $1,500,000 | Washington, DC, United States | Public Knowledge |
| University of Calgary | Digital Preservation of EMIC Audio Archive | 09/11/17 | $1,500,000 | Calgary, AB, Canada | Public Knowledge |
| Council on Library and Information Resources | General Support V | 06/06/13 | $1,550,000 | Washington, DC, United States | Public Knowledge |
| Ithaka Harbors, Inc. | Portico - E-Archive | 12/17/04 | $1,600,000 | New York, NY, United States | Public Knowledge |
| JSTOR | Arts and Humanities - Phase II | 12/17/99 | $1,750,000 | New York, NY, United States | Public Knowledge |
| University of North Carolina at Chapel Hill | Extending the Reach of Southern Audiovisual Sources | 05/31/18 | $1,752,000 | Chapel Hill, United States | Public Knowledge |
| American Council of Learned Societies | Technology Fellowships II | 06/13/08 | $1,777,000 | New York, NY, United States | Public Knowledge |
| American Council of Learned Societies | Digital Innovation Fellowship Program | 06/03/11 | $1,900,000 | New York, NY, United States | Public Knowledge |
| Ithaka Harbors, Inc. | Ithaka/ArtSTOR NextGen Capital Project | 06/01/17 | $1,997,000 | New York, NY, United States | Public Knowledge |
| Ithaka Harbors, Inc. | Online Database of Scholarly Resources | 03/19/04 | $2,000,000 | New York, NY, United States | Public Knowledge |
| Hypothes.is Project | Scaling Annotation in Scholarship and the Humanities | 05/31/18 | $2,000,000 | San Francisco, United States | Public Knowledge |
| Ithaka Harbors, Inc. | Capital Fund III | 12/17/04 | $2,000,000 | New York, NY, United States | Public Knowledge |
| Yale University | Music Librarian Endowment | 10/07/94 | $2,000,000 | New Haven, CT, United States | Public Knowledge |
| American Museum of Natural History | Integrated Digital Library | 03/19/99 | $2,000,000 | New York, NY, United States | Public Knowledge |
| Modern Language Association of America | JSTOR Modern Language and Literature Journals | 12/17/99 | $2,000,000 | New York, NY, United States | Public Knowledge |
| New York Public Library | Preservation of At-Risk Audiovisual Collections | 09/15/16 | $2,000,000 | New York, NY, United States | Public Knowledge |
| University of Kentucky | Digital Restoration of the Herculaneum Papyri | 03/06/19 | $2,002,000 | Lexington, KY, United States | Public Knowledge |
