Per Pompey, the three-time all-star also does not intend to report to training camp.
Simmons voiced his desire to leave Philadelphia in a meeting with team co-managing partner Josh Harris, president of basketball operations Daryl Morey, general manager Elton Brand and coach Doc Rivers.
Pompey reports the 76ers continue to try to deal Simmons, whose value has plummeted after a disastrous playoff performance.
However, the organization is having a tough time finding a partner for a deal, in part, due to its lofty trade demands, per Pompey.
The 76ers do not want to trade the 25-year-old point-forward for less than market value, but a source told Pompey that Morey's demand for a king's ransom is holding up negotiations.
Simmons — who has four years and $147 million remaining on his contract — is reportedly unconcerned by the possibility of the team fining him for holding out and failing to show up at camp.