- SIGMA COATINGS Protective Coatings and Marine Business Unit
- Silentor A/S
- SIMRAD AB
- Sims Pump Valve Co Inc
- Simtronics ASA (Head office)
- Sino Age Development Techtrade Ltd
- Sino-European Marine Services GmbH
- Sinsin Trading Co.,Ltd
- Sinwa Singapore Pte Ltd
- Siong Ping Engineering Sdn Bhd
- SITINDUSTRIE MARINE SAS
- SKB Life Saving Equipment
- SKF Coupling Systems AB
- SLAVIA GRATINGS s.r.o.
- Sleev-it Fire Systems Limited
- SM ELECTRICS GmbH
- SMC - Ship Motion Control
- SMECO
- SMEDEGAARDEN
- SMIT Hydraulics
- Smith Flow Control Ltd.
- Soc Nouvelle ACEBI SA
- Societe Internationale des Moteurs Baudouin
- SODENA AS
- SOFEC, Inc.
- Sofia Marine EOOD
- Sogenai S.p.A. SeaNet
- SOLAR SOLVE MARINE
- Solberg Scandinavian AS
- Somas Instrument AB
- Somet d.o.o.
- Sondex BV
- SORMEC Marine Crane
- Southern Marine Consult AS
- SP Consultores y Servicios
- Spartan Industrial Marine
- Sperre Asia PTE Ltd
- Sperre Rotterdam BV
- SPERRY MARINE A/S
- SPETECH Ltd.
- SPM Instrument BV
- SPRAYING SYSTEMS DEUTSCHLAND GMBH
- SPX Flow Technology Assen B.V.
- SPX Flow Technology Danmark A/S
- SRH Marine Electronics SA
- SSB Cryogenic Services Pte Ltd
- STA Schiffstechnik & Anlagenbau GmbH
- Stadt Automasjon AS
- STAHL Waschereimaschinenbau GmbH
- Stang Industries Inc. & CounterFire LTD.
- Star Instruments Ltd
- State Enterprise Admiralty Shipyards (Head Office)
- Statendam Steel Plates
- STAUFF International Trading (Shanghai) Co. Ltd.
- STC-Steyr Walzlager Deutschland GmbH
- Steering Gear Production Plant Ltd.
- Steerprop Ltd
- STEINSVIK AS
- STENTO ASA
- Stephens-Adamson Division
- Sterling Impreglon Asia Pte Ltd
- Sterlite Industries India Ltd
- Stierli Bieger AG
- STM Spain S.A.
- Stone Marine Propulsion Limited
- Stone Marine Singapore Pte Ltd
- STOP CHOC Schwingungstechnik GmbH
- STORK KWANT BV
- Straaltechniek Minex International SRL
- STRAITS SHIPPING SERVICES
- Stromag AG
- STS Sensoren Transmitter Systeme GmbH
- STT International Ltd.
- Sulzer Pumpen (Deutschland) GmbH
- Sun Marine Seats BV
- Sun-King Knitted Belt Product Ltd
- Sunflame Co., Ltd.
- SUNNY MARINE MACHINERY CO.,LTD
- Sunrise Marine Equipment Co. Ltd.
- Super Safety Services
- Superbolt, Inc.
- Supermar Machinery Ltd
- SUPON SA
- SURVITEC GROUP LIMITED
- Suzhou Marine Machinery Co., Ltd
- Suzhou Tongshun Marine Mechinery co.,Ltd
- Svend Hoyer A/S
- SYBERG AS
- Sylvia Electric (S) Pte Ltd
- T&E Engineering BV
- T-ISS Solastape BV
- T.R.K Group Co., Limited
- Taiko Kikai Industries Co., Ltd.
- Taiyo Electric Mfrg Co Ltd
- Taizhou Big Stone Imp. & Exp. Co., Ltd.
- Taizhou Lingxiao Pump Industrial Co. Ltd.
- TAIZHOU TIPANI HARDWARE CO.,LTD
- TAMEL SA
- TAMROTOR MARINE COMPRESSOS AS
- TANABE PNEUMATIC MACHINERY CO LTD