if I have manufacturers data in the advertisment which includes the company identifier, does a scan response packet with additional manufacturers data require the company identifier in the scan response data

[toy-knowlogy]

essentially, is the company identifier required in both the advertisement manufacturers data and the scan response manufacturers data?

[RK]

.. must read question better before replying ..

Any manufacturer data in either advertising response must conform to the specification for manufacturer data and that requires the company identifier as the first two octets.

So you can put in or leave out the entire manufacturer data from either advertising packet, but if you put it in, it must have the company identifier. See Supplement To Bluetooth Core Specification Part A section 1.4