H1b transfer

[Helpful hands]

I am working as a PT in Out-Patient clinic on H1b visa.

On my I-797 Company name is ABC but now employer is changing the company name from ABC to XYZ and will use different tax ID. My job duties & place will remain the same but they will issue the pay check with new company name XYZ.

Do I have to file H1b transfer from ABC to XYZ?

[Helpful hands]

On my I-797 only company name ABC is mentioned not a employer name & I am getting pay with company name ABC.

In my case my employer has 2 company ABC & XYZ with 2 different Tax ID (FEIN) and now he is closing one (ABC) by which he filed my H1b and transfer all employee, data & assets to company XYZ. My work location & duties will remain the same.

Do I have to file H1b transfer as my I-797 company name & FEIN is change or

file amendment or

Public Notarized Letter