Short answers, pulled from the story.
Bones studio began operations in October 1998 with eight founders. The number eight directly inspired the studio's name as a metaphor for the founders being mere bones that needed to work hard to become a fully realized body.
Masahiko Minami, Hiroshi Osaka, and Toshihiro Kawamoto were the founders of Bones studio. All three were former staff members of Sunrise before leaving to establish their own creative home in Igusa, Suginami, Tokyo.
Co-founder Hiroshi Osaka died from cancer on the 24th of September 2007 at the age of 44. His death left a significant void in the leadership and creative direction of Bones, forcing the organization to restructure its board of directors.
Bones studio has six production divisions known as Studio A through Studio F. Studio A is led by Naoki Amano, Studio B by Tatsuya Saito, Studio C by Yoshihiro Oyabu, Studio D by Nobuhito Takemoto, Studio E handles the Eureka Seven: Hi-Evolution trilogy, and Studio F began working on an unknown project in 2024.
Bones released the first Fullmetal Alchemist series from 2003 to 2004 under the direction of Seiji Mizushima. The second adaptation, Fullmetal Alchemist: Brotherhood, began in 2009 and was directed by Yasuhiro Irie.
Bones made a significant structural change in October 2024 by spinning off its production division under a separate, wholly owned subsidiary known as Bones Film. All productions from 2025 onward will be credited to Bones Film.