- Assogomma
- Gomma
- Assogomma
- Trasformatore
SO.T.AC. SRLAssociated since 2000
- Assogomma
- Gomma
SOGO SPAAssociated since 2022
- Assogomma
- Trasformatore
SOLE PONTEDERA SPAAssociated since 1990
- Assogomma
- Gomma
SOLGOMMA SPAAssociated since 1999
- Assogomma
- Aggregato
SOLVAY SPECIALTY POLYMERS ITALY SPAAssociated since 2023
- Assogomma
- Gomma
SPECIAL RUBBER SRL UNIPERSONALEAssociated since 2024
- Assogomma
- Trasformatore
SPIVAL SPAAssociated since 2024
- Assogomma
- Trasformatore