What happened to the holdings of the Atreides family after Duke Leto is assassinated?
His family rules planet Caladan, has a seat in the Landsraad assembly of noble families, has control over planet Arrakis, and owns a large stake in the Combine Honnete Ober Advancer Mercantiles (CHOAM). The CHOAM organization controls much of the economic affairs across the galaxy.
An answer to this question says what happened to Caladan, but does not say what happened to the rest of House Atreides vast wealth.
After the Atreides moved to Arrakis, Count Hasimir Fenring was named Siridar-Absentia of Caladan. However, when House Atreides ascended to the Golden Lion Throne in 10193 AG following the Arrakis Revolt, Caladan once again came under the direct rule of the Atreides.
And control over Arrakis was returned to House Harkonnen.
But what happened to the rest of the family holdings?
Was their seat in the Landsraad given to another house? Would that seat be abolished?
And who would inherit the family's other economic assets?