LinkedIn campaigns give us - 1. Company-level impression and engagements 2. Seniority level breakups 3. Job title level breakups Are there (not bank breaking) tools that can help correlate who from which company saw/engaged with these ads?

Being Shameless and plugging the company I'm currently consulting. You could solve this with ZenABM.com I'm currently using this tool for my clients to figure the intent and stage of each of the companies. Job titles are in WIP features. Not sure if they have seniority level in the roadmap. But they push the company level data to the CRM and I setup workflows in HubSpot for BDR outreach. Happy to connect you with the founders

ZenABM, its usability seems quite smooth. I mostly use Fibbler to push data back into HubSpot—it gives the SDR team a mix of signals like engagement and impressions at the account level, so they know which accounts to go after