Current evidence suggests he didn’t even do a prelim background check. His mistress worked for Chinese state television prior to the role she assumed through which she was introduced to him.
Source: The Economist. (Paywalled) https://economist.com/business/2026/11/11/there-has-never-be...
> That she might be a Chinese agent would have been obvious to Mr Huang had he inquired about her background: before going into business, Ms Huang worked at a Chinese state-run broadcaster known by its unimprovable acronym, “CCTV”.
A piece of speculative but interesting information: the FBI didn't give Jensen Huang a "defense briefing" which would warn him that he was being targeted, despite them knowing Alice Huang was a spy a year prior (memo circulated in May by the state department). Apparently this is very atypical.
The FBI so far has not provided a reason for the lack of a brief, but one reason they might not provide one is they suspect the target is a willing participant.