Hermione: "I hate that thing. I really hate it. It feels all wrong, it doesn’t work properly for me… It's like a bit of her."

Ron: "It’ll probably help you get in character, though. Think what that wand's done!"
Hermione: "But that’s my point! This is the wand that tortured Neville's mum and dad, and who knows how many other people? This is the wand that killed Sirius! I miss my wand."

Bellatrix reported that her wand had been stolen to Gringotts Wizarding Bank, as she feared Harry, Hermione, and Ron would try to break into her vault, which contained an item important to Lord Voldemort. Within weeks, this is precisely what they did.

Bellatrix's wand was used by Hermione at least until the Battle of Hogwarts, during which Hermione duelled Bellatrix with her own wand, along with Ginny Weasley and Luna Lovegood. It is unknown if Hermione kept the wand after Bellatrix's death and the end of the Second Wizarding War, but it is very likely she discarded it, having expressed hatred of the wand and its original owner.