Identifying the primary SIC code when multiple SIC codes are returned

Hello,

I have a question regarding the SIC code data returned from the Company API.

My understanding is that companies can pick more than one SIC code to describe their business but have to define a primary SIC code when they file with Companies House.

When multiple SIC codes are returned from the Company API, is the 1st SIC code in the list the primary SIC code? If not, is there a way of identifying which SIC code is the primary SIC code?

Thank you.

When forming companies through XML multiple SIC Codes are submitted just by repeating the same single item field multiple times. There aren’t any modifiers or anything that differentiates them.

My guess would be the differentiation between “primary” and other sic codes is just a cosmetic part of the UI of whatever system you’re using to file and not actually recorded as such anywhere or transmitted to CH.

This is just an unofficial guess though, you may still want CH confirmation.