- S.A. Sedni
- S.C.M. S.r.l.
- Saab TransponderTech AB
- SAACKE MARINE SYSTEMS /SAACKE GmbH
- SAACKE VKK MARINE BOILERS GMBH
- SAB Schunemann GmbH
- SAER Elettropompe S.p.A.
- Safe Pack Sicherheitsverpackungen GmbH
- Safestairs Hafentreppen GmbH
- Safetec Brandes und Niehoff
- Saft
- SALVEX
- SAM Electronics GmbH
- SAM Electronics Nederland BV
- Sami Instruments srl
- Sandfirden Technics b.v.
- Santon Holland B.V.
- Scandex AG
- SCANDINAVIAN BOILER SERVICE Inc. (SBS)
- 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
- SEAB Marine AB
- Seafresh Desalinators Ltd
- Seaglaze Marine Windows Ltd
- Seagull Marti Deniz Temizligi Ltd. Sti.
- SeaKing (International) AG
- Seasafe Systems
- Seastema S.p.a.
- Seastemi s.r.l.
- Seatek SpA
- SeaVsat
- SEBERT ENGINEERING GMBH
- SEC SHIP'S EQUIPMENT CENTRE BREMEN GmbH
- SEC Ship's Equipment Centre Groningen B.V.
- SECKIN KLIMA
- SEEKARTE KAPITAN A. DAMMEYER GmbH & Co. KG
- SEIM S.r.l.
- Semar Marine & Industrial Co.
- SENKRON ELEKTROMEKANIK LTD
- Shelquip Ltd
- Sherwin Williams
- Ship Machine-Building JSCo
- 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
- SIMRAD AB
- Sims Pump Valve Co Inc
- Sino-European Marine Services GmbH
- SITINDUSTRIE MARINE SAS
- SKF Coupling Systems AB
- SLAVIA GRATINGS s.r.o.
- Sleev-it Fire Systems Limited
- SM ELECTRICS GmbH
- SMC - Ship Motion Control
- 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
- Somas Instrument AB
- Sondex BV
- SORMEC Marine Crane
- SP Consultores y Servicios
- Sperre Rotterdam BV
- SPETECH Ltd.
- SPM Instrument BV
- SPRAYING SYSTEMS DEUTSCHLAND GMBH
- SPX Flow Technology Assen B.V.
- STA Schiffstechnik & Anlagenbau GmbH
- STAHL Waschereimaschinenbau GmbH
- Stang Industries Inc. & CounterFire LTD.
- Star Instruments Ltd
- State Enterprise Admiralty Shipyards (Head Office)
- Statendam Steel Plates
- STC-Steyr Walzlager Deutschland GmbH
- Steering Gear Production Plant Ltd.
- Stierli Bieger AG
- STM Spain S.A.
- Stone Marine Propulsion Limited
- STOP CHOC Schwingungstechnik GmbH
- STORK KWANT BV
- Straaltechniek Minex International SRL