As many of you already know, Palantir is an AI surveillance company, and in the Legendarium (the term for every piece of LOTR lore, including Unfinished Tales, the Silmarillion and more) the Palantir are magical stones made by the Elves that both allow people who wield them to communicate with one another, mostly used to manipulate and decieve the viewer, but there's more companies that I didn't know existed until looking various terms up as a result.

Anduril (Flame of the West in Elvish/Sindarin) is the reforged sword given to Aragorn, made from the shards of Narsil (in the books, it's reforged before the Council of Elrond and Aragorn carries it with him the entire time, as book Aragorn has essentially already gone through his character arc and just wants to be king, while Jackson's Aragorn receives Anduril as a gift from Elrond during the Ride to Gondor, in order to show the Army of the Dead that he is Isildur's heir and gain their service. The Thiel company is a drone company.

The Valar are the first of the beings created by the Abrahamic God of the Legendarium, Eru Iluvatar, effectively demigods, and the Thiel company is a VC investment firm.

Mithril is a metal lighter than silk and stronger than steel mined by the dwarves, which most notably in the trilogy is given to Frodo before leaving the Council of Elrond and saves him from getting stabbed several times, and while this isn't the last company (it's another VC investment firm), it's just really weird seeing someone intentionally take these terms and pervert them for his own purposes, as if he's trying to supplant Tolkien and have those terms remembered for how he uses them.