Magnum Photos is an international photographic cooperative owned by its photographer-members, with offices in Paris, New York City, London and Tokyo.

In 2010, MSD Capital acquired a collection of nearly 200,000 original press prints of images taken by Magnum photographers, which in 2013 it donated to the Harry Ransom Center.

[1] In response to a letter telling him that he was a member, Rodger wrote that Magnum seemed a good idea but, "It all sounded too halcyon to be true," when Capa had told him of it and, "I rather dismissed the whole thing from my mind".

The cooperative's archive includes photographs depicting family life, drugs, religion, war, poverty, famine, crime, government and celebrities.

presumably agreed by those present [at the first meeting] that Magnum was a fine new name for such a bold new venture, indicative as it was of greatness in its literal Latin translation, toughness in its gun connotation and celebration in its champagne mode.

Full members can choose to become contributors after 23 years of membership; this status gives them increased liberty to work outside Magnum, at the cost of their voting rights.

[10] Magnum's photographers meet once a year, during the last weekend in June, in New York City, Paris or London, to discuss the cooperative's business.

Given the tags on the photos, there was concern that Magnum was making available photographs of children featuring nudity; that documented encounters that constituted a record of acts of child sexual abuse; and that were problematic[clarification needed] in terms of the way they had been labelled for searching.

It had formed a partnership with the Harry Ransom Center at The University of Texas at Austin to preserve, catalog, and make photographs available to the general public.