- S&B Beschlaege GmbH
- S.A. Sedni
- Saab TransponderTech AB
- SAACKE MARINE SYSTEMS /SAACKE GmbH
- SAACKE VKK MARINE BOILERS GMBH
- SAB Schunemann GmbH
- Safe Pack Sicherheitsverpackungen GmbH
- Safestairs Hafentreppen GmbH
- Safetec Brandes und Niehoff
- Saft
- SALVEX
- SAM Electronics GmbH
- SAM Electronics Nederland BV
- Sandfirden Technics b.v.
- Santon Holland B.V.
- Scan-Sense AS
- Scandex AG
- Scandinavian Boiler Service A/S
- SCANDINAVIAN BOILER SERVICE Inc. (SBS)
- SCANDINAVIAN ELECTRIC AS
- Scandinavian Micro Systems AS
- SCANROPE MARINE A/S
- Scanvi-Interyards AS
- Scardana Americas Brokerage (Head Office)
- SCHAAF GmbH & Co. KG
- Schaffran Propeller + Service
- Schaller Automation
- SCHIFFSDIESELTECHNIK Kiel GmbH
- Schilder Gerlach GmbH
- SCHMIDT CLEMENS GmbH Co. KG
- SCHMITT ANCHORS & CHAINCABLES B.V.
- SCHNEIDER ELECTRIC
- Schoenrock Hydraulik Marine Systems GmbH
- Schonwolf Hamburg
- SCHOTTEL GmbH
- Schwarze-Robitec GmbH
- SCHWINGUNGSTECHNIK-BRONESKE GmbH
- Scotgrip (UK) Ltd
- SDT International
- SEAB Marine AB
- Seafresh Desalinators Ltd
- Seaglaze Marine Windows Ltd
- Sealtech ApS
- Seasafe Systems
- SeaVsat
- SEBERT ENGINEERING GMBH
- SEC SHIP'S EQUIPMENT CENTRE BREMEN GmbH
- SEC Ship's Equipment Centre Groningen B.V.
- SEEKARTE KAPITAN A. DAMMEYER GmbH & Co. KG
- SES-X MARINE TECHNOLOGIES
- Shelquip Ltd
- Sherwin Williams
- SHIP EQUIP AS
- Shipham Valves Ltd
- Ships Electronic Services Ltd
- SIEMENS AG Industrial Solutions and Services Industrial Plants
- Siemens Nederland N.V. Bruinhof Marine
- SIGMA COATINGS Protective Coatings and Marine Business Unit
- Silentor A/S
- SIMRAD AB
- Sims Pump Valve Co Inc
- Simtronics ASA (Head office)
- Sino-European Marine Services GmbH
- SITINDUSTRIE MARINE SAS
- SKB Life Saving Equipment
- SKF Coupling Systems AB
- Sleev-it Fire Systems Limited
- SM ELECTRICS GmbH
- SMC - Ship Motion Control
- SMEDEGAARDEN
- Smith Flow Control Ltd.
- Soc Nouvelle ACEBI SA
- Societe Internationale des Moteurs Baudouin
- SODENA AS
- SOFEC, Inc.
- SOLAR SOLVE MARINE
- Solberg Scandinavian AS
- Somas Instrument AB
- Sondex BV
- Southern Marine Consult AS
- SP Consultores y Servicios
- Spartan Industrial Marine
- Sperre Rotterdam BV
- SPERRY MARINE A/S
- SPM Instrument BV
- SPRAYING SYSTEMS DEUTSCHLAND GMBH
- SPX Flow Technology Assen B.V.
- SPX Flow Technology Danmark A/S
- STA Schiffstechnik & Anlagenbau GmbH
- Stadt Automasjon AS
- STAHL Waschereimaschinenbau GmbH
- Stang Industries Inc. & CounterFire LTD.
- Star Instruments Ltd
- Statendam Steel Plates
- STC-Steyr Walzlager Deutschland GmbH
- STEINSVIK AS
- STENTO ASA
- Stephens-Adamson Division
- STM Spain S.A.
- Stone Marine Propulsion Limited