Context: I am currently a college student in my senior year. I have completed several internships, and am currently interviewing for full time roles.
Yesterday I completed super day (final round) interviews with two different companies (henceforth A and B). In both instances, I was provided with an interview schedule and the names of the people whom I would be speaking with. I was not provided with email addresses or contact information.
To provide a bit more context, my HR contact from company A reached out to let me know that I should expect to hear back about their decision within two weeks. Company B told me that they expect to make a decision within two business days. At this point I would strongly prefer working at company A.
Both A and B are large, well-known corporations, and in both cases I am interviewing for very competitive consulting / analyst rotation programs.
It is my understanding that it is always proper etiquette to send thank you notes to one's interviewers after an interview. My question: would it be perceived as poor etiquette if I looked up their email addresses to send thank you notes, when this information was not provided to me in the first place? Or would it be more damaging if I did not send a thank you note at all?
In both cases, my interviewers were employees who worked in roles similar to the ones that I am applying for. My HR contact/recruiter has been my point of contact for all communications regarding the application process.
I would appreciate a bit of insight concerning this matter.
Edit: The industries in question are banking and strategy consulting.