Spanish to English Bus/Financial Insurance Reinsurance

I am translating a series of insurance contracts and the current one deals with reinsurance.
The following line appears in the first line of the contract...

El Retrocesionario abonará a la Retrocedente la parte que le corresponde...

I know that "Retrocesionario" is equivalent to the term "Retrocessionaire" (the company that is reinsuring the insurer) which is used in English but I am unable to find an equivalent for "Retrocedente".

My feeling is that this is simply "Insurer" - can anyone confirm that or suggest otherwise?
Thank you!