My E-3 employer is no longer in business; can I keep my priority date if I find a new petitioner?
Yes. Per the Foreign Affairs Manual: “Unless revoked pursuant to 8 CFR 205.2 for fraud or misrepresentation, a priority date accorded by approval of an employment-based first, second, or third preference petition is retained by the beneficiary for any other first, second, or third preference petition approved subsequently for the same beneficiary. In all cases, the beneficiary of multiple petitions is entitled to the earliest of the filing dates of the various petitions.”
Your new prospective employer will need, however, to file a new I-140 and complete all the necessary associate paperwork before your interview with a consular officer can be scheduled.