Katherine Sophie Dreier (September 10, 1877-March 29, 1952) was an American artist, lecturer, patron of the arts, and social reformer. Dreier was also an active suffragette.
Biography on Wikipedia: https://en.wikipedia.org/wiki/Katherine_Sophie_Dreier

Self-Portrait by Katherine S. Dreier
1911 / Oil on canvas / 20-1/16″x16″ / Yale University Art Gallery, New Haven, CT

Katherine S. Dreier Papers / Société Anonyme Archive:
https://beinecke.library.yale.edu/collections/highlights/katherine-s-dreier-papers-societe-anonyme-archive

Further reading:
https://www.guggenheim.org/history/katherine-s-dreier
https://awarewomenartists.com/en/artiste/katherine-dreier/
https://www.gazette-drouot.com/en/article/the-spirit-of-modern-art%253A-the-societe-anonyme-collection/22673