HARRPA has 18 companies (of which two associate members) all listed by type of production:
- Rosin Resins & Pine Chemicals
- Hydrocarbon Resins.
Companies producing both Rosin Resins & Pine Chemicals and Hydrocarbon Resins are combined under one category: "Rosin Resins & Pine Chemicals and Hydrocarbon Resins Producers"
A) Rosin Resins & Pine Chemicals Producers (RRP)
RRP Associated Members
B) Hydrocarbon Resins Producers (HCR)
C) Rosin Resins and Pine Chemicals and Hydrocarbon Resins (RRP + HCR)