Should validation classes be static classes?

I m working on a system which get thousands of requests per second, and essentially one of the tasks we are trying to avoid is to create unnecessary/extra objects.

We need to validate incoming request for 6 request items per se.

I m thinking of creating a class per each item validation.

However, I m trying to justify if i should use static validation classes vs object with instances that contains HttpRequest as the instance field.

should i use static classes or objects? what would you do?

Essentially, what I m doing is injecting List<IValidator> validators to request handler and iterating over it. but not sure if i should have an instance vs static classes.