| Company | Search On | Records | Category | Sub category |
| SAAB-Scania Aerospace Division | SAAB | 79 | Aircraft Manufacturers | Non UK |
| Saalfeld Aircraft Co | Saalfeld | 1 | Aircraft Manufacturers | Autogyro |
| Sabena | Sabena | 8 | Maintenance | Contractors |
| Sadd & Sons Ltd. John | Sadds | 4 | Fabrication | Woodworking |
| SAFT. Societe Des Accumulateurs Fixes Et De Traction | SAFT | 2 | Components | Electrical |
| Sagar & Co Ltd. J. | Sagar | 16 | Engineering Equipment | Machining |
| Sage & Co Ltd. Frederick | Sage | 24 | Components | Propellers |
| Salmesbury Engineering Ltd | SalmesburyEngineering | 3 | Manufacturing | Machining |
| Salmons & Sons | Salmons | 1 | Fabrication | Wood |
| Salmson Aero Engines Ltd. British | Salmson | 99 | Engine Manufacturers | |
| Standard Alloys Ltd | SALStandardAlloys | 1 | Engineering Equipment | Solder |
| Salter & Co Ltd. Geo | Salter | 74 | Components | Springs |
| S.A.Brevetti | Salvator | 4 | Survival Equipment | Parachutes |
| Salvolene Lubricants Ltd | Salvolene | 2 | Lubricant Suppliers | |
| Samuel Fox & Co Ltd | SamuelFox | 84 | Materials | Steel |
| Samuel Jones & Co Ltd | SamuelJones | 14 | Factory | Logistics |
| Samuel Mercer & Co | SamuelMercer | 2 | Suppliers | Sheet Metal |
| Samuel Osborn & Co Ltd | SamuelOsborn | 7 | Engineering Equipment | Machine Tools |
| Samuel White & Co Ltd. J. | SamuelWhite | 25 | Marine Craft | |
| Sanders Aeroplane Co | Sanders | 18 | Aircraft Manufacturers | |
| Sanderson Brothers & Newbould Sheffield Ltd | SandersonBrothers | 1 | Materials | Steel |
| Sandvik Steels | SandvikSteels | 3 | Materials | Steel |
| Sandwell Casting Co | SandwellCasting | 5 | Manufacturing | Castings |
| Sangamo Weston Ltd | SangamoWeston | 123 | Instrument Manufacturers | Flight Instruments |
| Sanitary & Water Fittings Mfg Co | Sanitary | 3 | Materials | Solder |
| Sankey & Sons Ltd. Joseph | Sankey | 39 | Fabrication | Castings |
| Sansum & Co. S. | Sansum | 4 | Manufacturing | Tubing |
| Santon Ltd | Santon | 19 | Factory | Catering |
| Santoni. D.Lawrence | Santoni | 2 | Engine Manufacturers | |
| Saunders-Roe Ltd. | SARO | 268 | Aircraft Manufacturers | Flying Boat |
| Sasco Group | Sasco | 2 | Components | Accessories |
| SATCO. N.V.Hollandse Signaalapparaten | Satco | 7 | Airfields | Air Traffic Control |
| Saudi Arabian Airlines | Saudia | 1 | Air Transport | Airlines |
| Saunders Ltd. S E | Saunders | 44 | Aircraft Manufacturers | |
| Saunders Aircraft Corporation | SaundersCorp | 3 | Aircraft Manufacturers | Non UK |
| Saunders Valve Company Ltd | SaundersValve | 211 | Components | Piping |
| Savage Ltd. W.Bryan | Savage | 23 | Testing | Test Equipment |
| Savage & Parsons Ltd | SavageParsons | 1 | Avionics | Test Equipment |
| Savoia-Marchetti | SavoiaMarchetti | 2 | Aircraft Manufacturers | Non UK |
| Scalecraft | Scalecraft | 11 | Models | Display |
| Schermuly Pistol Rocket Apparatus Ltd. The | Schermuly | 3 | Survival Equipment | Pyrotechnics |
| Schlumberger. Enertic | Schlumberger | 1 | Testing | Test Equipment |
| Schottel (England) Ltd | Schottel | 1 | Components | Controls |
| Schrader | Schrader | 31 | Engineering Equipment | Pneumatics |
| Sciaky Electric Welding Machines Ltd | Sciaky | 10 | Engineering Equipment | Welding |
| Scintilla Ltd | Scintilla | 43 | Components | Magnetos |
| Scott Bader & Co Ltd | ScottBader | 1 | Materials | Resin |
| Scottish Aviation Ltd | ScottishAviation | 105 | Aircraft Manufacturers | |
| Scrivener Ltd. Arthur | Scrivener | 2 | Engineering Equipment | Machine Tools |
| Scud Flying Model Aircraft | Scud | 6 | Models | Flying |
| Sealdraught Ltd | SealDraught | 1 | Manufacturing | Seals |
| Searle Aircraft & Sheet Metal Works Ltd | Searle | 3 | Manufacturing | Sheet Metal Work |
| Seaspeed | Seaspeed | 1 | Air Transport | Airlines |
| Security Steel Strapping Ltd | SecurityStrapping | 1 | Factory | Logistics |
| Selectus Ltd | Selectus | 5 | Materials | Velcro |
| Selenia Industrie Elettroniche ApA | Selenia | 14 | Airfields | Radar |
| Selfridge & Co Ltd | Selfridges | 43 | Distributors | Flying Clothing |
| Sellman & Hill Ltd | SellmanHill | 2 | Manufacturing | Sheet Metal Work |
| Selsdon Aero & Engineering Co | Selsdon | 16 | Aircraft | Components |
| Selson Engineering Co Ltd | SelsonEngineering | 1 | Engineering Equipment | Machine Tools |
| S.E.Opperman Ltd | SEOpperman | 40 | Components | Gears |
| Sepecat | Sepecat | 19 | Aircraft Manufacturers | |
| Societe Detude De La Propulsion Par Reaction | SEPR | 6 | Aircraft Manufacturers | Rockets |
| Sequoia Aircraft Corporation | Sequoia | 1 | Aircraft Manufacturers | Non UK |
| Serck Radiators Ltd | Serck | 38 | Components | Radiators |
| Jimmy James Test Pilot | Services | 3 | Aerial Work | Test Pilot |
| Seton Creaghe Engineering | SetonCreaghe | 2 | Collaboration | Consultancy |
| SFIM (Great Britain) Ltd | SFIM | 1 | Instrument Manufacturers | |
| Societe Generale Aeronautique | SGA | 5 | Aircraft Manufacturers | Non UK |
| S.G.Brown Ltd | SGBrown | 48 | Instrument Manufacturers | Flight Instruments |
| S.G.Leach & Co Ltd | SGLeach | 2 | Factory | Air Conditioning |
| Shackleton & Murray | ShackletonMurray | 3 | Aircraft Manufacturers | |
| Shafer Bearing & Chain Belt Co | Shafer | 3 | Components | Chains |
| Shannon Visible Records Ltd. The | Shannon | 6 | Factory | Office Equipment |
| Sheet Metal Components (Reading) Ltd | SheetMetalComp | 1 | Manufacturing | Sheet Metal Work |
| Sheffield Simplex Motor Works Ltd. The | SheffieldSimplex | 2 | Engine Manufacturers | |
| Shell Mex Ltd | Shell | 886 | Fuel Suppliers | |
| Shenstone & Co Ltd | Shenstone | 2 | Aeronautical Engineers | |
| Shepperd Metal Productions Ltd | ShepperdMetal | 1 | Manufacturing | Sheet Metal Work |
| Shoreham-By-Sea. Airport | Shoreham | 9 | Airfields | Flying School |
| Shorrock Developments Ltd | ShorrockDevelopments | 6 | Leisure | Airband Radio |
| Short Brothers | Short | 626 | Aircraft Manufacturers | |
| Short & Mason Ltd |
Short and Mason |
78 | Instrument Manufacturers | Flight Instruments |
| SIAI Marchetti | SIAIMarchetti | 31 | Aircraft Manufacturers | Non UK |
| Siddeley-Deasy Motor Car Co Ltd | SiddeleyDeasy | 12 | Aircraft Manufacturers | |
| Siebe Gorman & Co Ltd | SiebeGorman | 26 | Components | Cabin Seating |
| Siegrist-Orel Ltd | SiegristOrel | 5 | Components | Electrical |
| Siemens-Schuckert (Great Britain) Ltd | Siemens | 8 | Manufacturing | Rolling Mills |
| Sigmund Pumps Ltd | SigmundPumps | 1 | Components | Pumps |
| Sikorsky Aircraft | Sikorsky | 17 | Aircraft Manufacturers | Rotary Wing |
| Silentbloc Ltd | Silentbloc | 20 | Components | Bearings |
| Silent Gliss Ltd | SilentGliss | 2 | Fixtures and Fittings | Cabin Furnishings |
| Silico Enamel Co | SilicoEnamel | 1 | Finishes | Paints |
| Silver City Airways | SilverCity | 3 | Air Transport | Airlines |
| Silvertown Lubricants Ltd | Silvertown | 35 | Lubricant Suppliers | Oil |
| Simmonds Aerocessories Ltd | Simmonds | 257 | Components | Controls |
| Simmonds Development Corporation | SimmondsDev | 5 | Finance | Venture Capital |
| Simmons & Hawker Ltd | SimmonsHawker | 1 | Manufacturing | Pipes |
| Simms Magneto Co Ltd | SimmsMagneto | 81 | Components | Magnetos |
| Simms Motor Units Ltd | SimmsMotor | 20 | Instrument Manufacturers | Gauge |
| Simon Equipment Ltd | SimonEquipment | 10 | Data | Recording |
| Simplifix Couplings Ltd | Simplifix | 1 | Components | Couplings |
| Simpsons Of Picadilly | Simpsons | 5 | Clothing | Uniforms |
| Simpson Williams & Co | SimpsonWilliams | 3 | Fasteners | Clamps |
| Singer Company. The | SingerLink | 2 | Training | Flight Simulation |
| Sintered Products Ltd | SinteredProducts | 1 | Materials | Sintered Metals |
| Skefco Ball Bearing Co Ltd | SKF | 45 | Components | Bearings |
| Skilsaw. British Equipment Ltd | Skilsaw | 6 | Engineering Equipment | Hand Tools |
| Skinners (Southampton) Ltd | Skinners | 7 | Manufacturing | Precision Engineering |
| Skybirds. A J Holladay & Co Ltd | Skybirds | 60 | Models | Display |
| Skyhi Limited | Skyhi | 56 | Ground Equipment | Jacks |
| Skyways Of London | Skyways | 12 | Air Transport | Airlines |
| S Lewis | Slewis | 30 | Clothing | Flying Clothing |
| Slick Brands Ltd | Slick | 1 | Consumables | Sealant |
| Slingsby Sailplanes Ltd | Slingsby |
20 | Aircraft Manufacturers | Gliders |
| Smart & Brown (Machine Tools) Ltd | SmartBrown | 6 | Components | Radio |
| Smith-Adams Separator Co Ltd. The | SmithAdams | 1 | Chemicals | Anti Corrosion |
| Smith & Ansell Ltd | SmithAnsell | 1 | Fabrication | Sheet Metal Work |
| Smith-Clayton Forge Ltd | SmithClayton | 16 | Manufacturing | Forging |
| Smith & Dowse | SmithDowse | 1 | Manufacturing | Components |
| Smith & Grace Ltd | SmithGrace | 1 | Factory | Machinery |
| Smith Meters Ltd | SmithMeters | 7 | Instrument Manufacturers | Flight Instruments |
| Smiths. S.Smith and Sons | Smiths | 707 | Instrument Manufacturers | |
| Smiths Industries Ltd | SmithsIndustries | 25 | Components | |
| Smith's Stamping Works (Coventry) Ltd | SmithsStamping | 1 | Manufacturing | Stampings |
| Societe Nationale De Constructors Du Sud-Ouest | SNASCO | 10 | Aircraft Manufacturers | Non UK |
| Societe Nationale De Constructors Du Nord | SNCAN | 1 | Aircraft Manufacturers | Non UK |
| Societe National D'etude De Construction De Moteurs D'Aviation | SNECMA | 16 | Engine Manufacturers | Non UK |
| Snercold Engineering Co Ltd. The | Snercold | 3 | Manufacturing | Sheet Metal Work |
| Snewin. C.B.N. | Snewin | 1 | Suppliers | Wood |
| Soag Machine Tools Ltd | Soag | 1 | Engineering Equipment | Machine Tools |
| Solartron Electronic Group Ltd. The | Solartron | 26 | Airfields | Air Traffic Control |
| Solar Weld Languepin Ltd | SolarWeld | 3 | Engineering Equipment | Machinery |
| Solex Ltd | Solex | 3 | Instrument Manufacturers | Test Equipment |
| Sopwith Aviation Co Ltd | Sopwith | 64 | Aircraft Manufacturers | |
| Sorbo Ltd | Sorbo | 4 | Materials | Rubber |
| Southam & Wood Ltd | SouthamWood | 2 | Components | Radiators |
| South Coast Air Taxis Ltd | SouthCoast | 1 | Air Transport | Air Charter |
| South Downs Aero Club | SouthDowns | 1 | Training | Flying School |
| Southern Aircraft Ltd | SouthernAircraft | 1 | Aircraft Manufacturers | |
| Southern Forge Ltd | SouthernForge | 26 | Manufacturing | Forging |
| Southern Instruments Oscillograph Division | SouthernInstruments | 5 | Instrument Manufacturers | Test Equipment |
| Southwark Manufacturing Co Ltd. The | SouthwarkMfg | 2 | Components | Gaskets |
| Space Models Ltd | SpaceModels | 1 | Models | Display |
| Spa Guilds Ltd | SpaGuilds | 1 | Manufacturing | Precision Engineering |
| Spartan Aircraft Ltd | Spartan | 146 | Aircraft Manufacturers | |
| S.P.E. Self Priming Pump & Engineering Co Ltd |
SPE | 67 | Components | Controls |
| Spear & Jackson Ltd | SpearJackson | 4 | Materials | Steel |
| Specialloid Ltd | Specialloid | 1 | Components | Pistons |
| Specto Ltd | Specto | 3 | Testing | Electrical |
| Silvertown Lubricants Ltd | Speedolene | 2 | Lubricant Suppliers | |
| Speke Airport. Liverpool | Speke | 1 | Airfields | Airfield Operators |
| Spencer Moulton | SpencerMoulton | 9 | Components | Rubber |
| Spencer & Sons (Market Harborough) Ltd | SpencerSons | 1 | Manufacturing | Precision Engineering |
| Spensers Ltd | Spensers | 1 | Manufacturing | AGS |
| Sperry Gyroscope Company Ltd | Sperry | 455 | Instrument Manufacturers | Flight Instruments |
| Sperry Rand Ltd | SperryRand | 7 | Avionics | Navigation |
| Sphinx Maufacturing Co | Sphinx | 23 | Components | Spark Plugs |
| Spicers Ltd | Spicers | 2 | Components | Electrical |
| Spiral Tube & Components Co | SpiralTube | 23 | Components | Radiators |
| Splintex Safety Glass Ltd | Splintex | 7 | Materials | Transparencies |
| Spring Washers Ltd | SpringWashers | 1 | Aircraft Parts | Accessories |
| Spurlings Ltd | Spurlings | 13 | Airfields | Ground Handling |
| S.Sherman & Son | SSherman | 1 | Manufacturing | Sheet Metal Work |
| S.S.White Co. The | SSWhite | 11 | Engineering Equipment | Flexible Shaft Equipment |
| Stace & Co Ltd. M.E. | Stace | 5 | Components | Rubber |
| Stainless Steel Wire Co Ltd | StainlessWire | 13 | Manufacturing | Wire |
| Standard Aircraft Manufacturing Co | StandardAircraftMfg | 4 | Manufacturing | Components |
| Standard Motor Co Ltd | StandardMotor | 19 | Vehicles | Cars |
| Standard Telephones and Cables Limited | StandardRadio | 252 | Components | Wireless |
| Standard Range & Foundry Co Ltd | StandardRange | 1 | Structures | Fittings |
| Stanley Aviation Co | StanleyAviation | 2 | Components | Aircraft |
| Stanley Aviation Corp | StanleyAviationCorp | 1 | Components | R & D |
| Staravia | Staravia | 12 | Aircraft Parts | Suppliers |
| Stargate Engineering Ltd | Stargate | 1 | Manufacturing | Machining |
| Statax Engine Co Ltd | Statax | 1 | Engine Manufacturers | |
| Staverton Airport | Staverton | 1 | Airfields | |
| Steel Barrel Co Ltd. The | SteelBarrel | 3 | Ground Equipment | Refuelling |
| Steel, Peech & Tozer | SteelPeech | 1 | Manufacturing | Forging |
| Steel Stampings Ltd | SteelStampings | 6 | Manufacturing | Presswork |
| Stemco Ltd | Stemco | 2 | Ground Equipment | Refuelling |
| Step Industrial Equipment Ltd | Step | 1 | Engineering Equipment | Lubrication |
| Stephens Tractors Ltd | StephensTractors | 3 | Ground Equipment | Aircraft Tractors |
| Sterling Metals Ltd | SterlingMetals | 72 | Manufacturing | Castings |
| Sternol Ltd | Sternol | 72 | Health And Safety | Personal Protection |
| Stewart Aeronautical Supply Co Ltd | StewartAeronauticalSupply | 13 | Aircraft Parts | Distributors |
| St Helens Cable & Rubber Co Ltd | StHelensCable | 12 | Components | Wire |
| Stinson | Stinson | 12 | Aircraft Manufacturers | Non UK |
| Stockists. Archibald Dawnay | Stockists | 3 | Materials | Stockists |
| Stockport Manufacturing Co Ltd. The | StockportMfg | 1 | Manufacturing | Sheet Metal Work |
| Stokes & Holt Ltd | StokesHolt | 1 | Manufacturing | Cane |
| Stone-Chance Ltd | StoneChance | 1 | Components | Electrical |
| Stonehouse Steel Equipments | StonehouseSteel | 2 | Factory | Storage |
| Stotts Of Oldham | Stotts | 1 | Engineering Equipment | Adhesives |
| Strachan & Brown | StrachanBrown | 2 | Aeronautical Engineers | |
| Straight Aviation Training Ltd | StraightAviation | 16 | Training | Flight Simulation |
| Stratton & Co Ltd | Stratton | 1 | Manufacturing | AGS |
| Stream-Line Filters Ltd | Streamline | 77 | Components | Filters |
| Stringer & Co (Sheffield) Ltd | Stringer | 1 | Manufacturing | Forging |
| S.T.Robson Ltd | STRobson | 3 | Manufacturing | Parts |
| Structures | Structures | 55 | Structures | Hangars |
| S.M.Stuart-Turner & Co (Surrey) Ltd | StuartTurner | 1 | Components | Pumps |
| B.F Sturtevant Company | Sturtevant | 23 | Engine Manufacturers | Non UK |
| S.U.Carburetter Co Ltd |
S.U. | 4 | Components | Carburetters |
| Submarine Cables Ltd | SubmarineCables | 5 | Survival Equipment | Beacon |
| Suchy Holdings Ltd | Suchy | 4 | Components | Accessories |
| Sud Aviation |
SUD |
98 | Aircraft Manufacturers | Non UK |
| Suffolk Iron Foundry (1920) Ltd | SuffolkIron | 11 | Engineering Equipment | Welding |
| Suflex Ltd | Suflex | 6 | Components | Electrical |
| Sugg & Co Ltd. William | Sugg | 2 | Engineers | Aircraft |
| Sunbeam Motor Car Co Ltd | SunbeamCoatalen | 72 | Engine Manufacturers | |
| Sun Electrical Company Ltd. The | SunElectrical | 8 | Components | Electrical |
| Sunley & Co Ltd. B. | Sunley | 13 | Airfields | |
| Sunstrand Aviation | Sunstrand | 1 | Components | Electrical |
| Super Aviation Co Ltd | SuperAviation | 2 | Manufacturing | Components |
| Superflexit Ltd | Superflexit | 10 | Manufacturing | Tubing |
| Supermarine | Supermarine | 167 | Aircraft Manufacturers | |
| Super Oil Seals & Gaskets Ltd | SuperOilSeals | 33 | Aircraft Manufacturers | Seals |
| Suplex Lamps Ltd | SuplexLamps | 1 | Components | Lighting |
| Surrey Flying Services Ltd | SurreyFlyingServices | 14 | Air Transport | Air Charter |
| Surridges Patents Ltd | SurridgesPatents | 16 | Materials | Adhesives |
| Survival (Misc) | Survival | 3 | Survival Equipment | Parachutes |
| Sutcliffe Ventilating & Drying Co Ltd | SutcliffeVentilating | 2 | Factory | Air Conditioning |
| Sutherland Meter Company Ltd. The | SutherlandMeter | 1 | Manufacturing | Sheet Metal Work |
| Swanser & Son | SwanserSon | 2 | Manufacturing | Components |
| Swearingen Aircraft | Swearingen | 15 | Aircraft Manufacturers | Non UK |
| Swift Aviation Co | SwiftAviation | 2 | Manufacturing | Components |
| Swift Levick & Sons Ltd | SwiftLevick | 1 | Materials | Steel |
| Swissair | Swissair | 3 | Air Transport | Airlines |
| S. Wolf & Co Ltd | SWolf | 16 | Engineering Equipment | Hand Tools |
| Sywell Aerodrome | Sywell | 8 | Airfields | |
