In the collection of:
- The National Gallery *
- The Addison Gallery of American Art **
- Maeght Gallery, Paris
- The Provincetown Art Association and Museum
- Cape Cod Museum of Art
- University of Maine
- Colby Sawyer College
- Haystack Mountain School
- St. Anselm College
- Dartmouth College ***
- University of New Hampshire***
- Private Collections in: York, Maine; Deer Isle, Maine; Stonington, Maine; Blue Hill, ME, Castine, Maine; Boston, MA; Newton, MA; Barnstable, MA; Orleans, MA; Truro, MA; Sommerville, MA; Portsmouth, NH; Lake Worth, FL; New York, NY, Rhode Island, Pennsylvania, and Elsah, IL.
* https://www.nga.gov/collection/art-object-page.147225.html
**http://accessaddison.andover.edu/objects-1/info?query=mfs%20all%20%22Holst%22&sort=9&page=3
***according to the “Florida Alligator,” “Colby Currier,” his 1977 CV, and “”Art New England.”