"to vest" is a correct and usable phrase in written English.
To vest can mean to formally give someone the title, rights, or duties of a particular office or position or it can mean to set something aside or authorize someone to use something. For example, "The board voted to vest the CEO with additional duties."
Dictionary
to vest
noun
A loose robe or outer garment worn historically by men in Arab or Middle Eastern countries.
Exact(60)
Maybe they don't allow options to vest immediately.
This is the final tranche of those shares to vest.
Whatever happened to vest and shorts, proper shorts?
The rest are to vest on Sept. 1, 2003.
"There are no pending proposals to vest the I.T.U. with direct Internet governance authority".
"I don't want to vest my self-esteem in the approval of strangers".
That move also has costs, though, especially with more stock payouts that take years to vest.
She again will be able to vest, or cash out, portions of that over three years.
"Employees were paid in restricted stock that took several years to vest.
That particular grant of restricted stock will not start to vest until 2016.
Assuming markets improve, it suggests more upside for employees when the stock starts to vest a few years on.
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com