| Company | Search On | Records | Category | Sub category |
| WACO. Advance Aircraft Company | Waco | 4 | Aircraft Manufacturers | Non UK |
| Wade & Jones Ltd | WadeJones | 1 | Components | Electrical |
| Wadkin & Co | Wadkin | 26 | Engineering Equipment | Machining |
| WAECO Ltd | WAECO | 1 | Survival Equipment | Inflatables |
| Wainwright | Wainwright | 15 | Clothing | Flying Clothing |
| W.A & R.J. Jacobs Ltd | WAJacobs | 2 | Manufacturing | Stampings |
| Walker Crossweller & Co Ltd | WalkerCrossweller | 3 | Instrument Manufacturers | Flow Indicators |
| Wallington Weston & Co Ltd | WallingtonWeston | 4 | Materials | Plastics |
| Wallis Autogyros Ltd | Wallis | 2 | Aircraft Manufacturers | Autogyro |
| Walsall Aerodrome | Walsall | 15 | Airfields | |
| Walter & Co. J. | Walter | 10 | Engine Manufacturers | Non UK |
| Walter Lawrence & Son Ltd | WalterLawrence | 1 | Manufacturing | Jigs |
| Walter's Electrical Manfg Co | WalterMFG | 9 | Components | Electrical |
| Walter Spencer & Co Ltd | WalterSpencer | 1 | Components | AGS |
| Walton Yacht Works | WaltonYacht | 21 | Watercraft | Launches And Tenders |
| W.A.Parker (Aircraft Spares) Ltd | WAParker | 1 | Aircraft Parts | Accessories |
| Ward Brooke & Co Ltd | WardBrooke | 32 | Manufacturing | Accessories |
| Wardle Engineering Co Ltd | Wardle | 2 | Factory | Lighting |
| Warerite Ltd | Warerite | 1 | Materials | Laminated Plastics |
| Waring & Gillow Ltd | WaringGillow | 3 | Aircraft Manufacturers | |
| Warner Engineering | WarnerEngineering | 1 | Engineering Equipment | Clinometer |
| Warwick Aviation Co Ltd | WarwickAviation | 4 | Manufacturing | Aircraft Constructors |
| Warwick Aviation Co Ltd | WarwickAviation | 4 | Manufacturing | Aircraft Constructors |
| Warwick Rim & Sectioning Co Ltd | WarwickRim | 3 | Manufacturing | Sheet Metal Work |
| Warwick Wright Ltd | WarwickWright | 31 | Engine Manufacturers | |
| W.A.Smith & Co Ltd | WASmith | 2 | Clothing | Protective |
| Wassmer | Wassmer | 2 | Aircraft Manufacturers | Non UK |
| W.A.Walber & Co | WAWalber | 1 | Factory | Machinery |
| W & A.Williamson & Co Ltd | WAWilliamson | 5 | Manufacturing | Sheet Metal Work |
| Waymouth Gauges & Instruments Ltd | Waymouth | 1 | Components | Controls |
| Wayne | Wayne | 9 | Ground Equipment | Refuelling |
| Way & Waller | WayWaller | 8 | Letting Agents | |
| W.B.Chippendale & Co | WBChippendale | 1 | Aircraft Manufacturers | |
| Wright Bindley And Gell Ltd | WBG | 10 | Components | Machining |
| W.Canning & Co | WCanning | 4 | Finishes | Electroplating |
| W.Chamberlain | WChamberlain | 2 | Manufacturing | Stamps |
| Weatherly Oilgear Ltd | Weatherly | 1 | Engineering Equipment | Machine Tools |
| Weathershields Ltd | Weathershields | 15 | Fasteners | AGS |
| Webb Peet & Co | WebbPeet | 3 | Engine Manufacturers | |
| Webley & Scott Ltd | Webley | 4 | Survival Equipment | Signal Guns |
| Wells Aviation Ltd | Wells | 18 | Aircraft Manufacturers | |
| Wellworthy Ltd | Wellworthy | 78 | Components | Piston Rings |
| Welsh Metal Industries Ltd | WelshMetal | 2 | Materials | Anodising |
| Western Airways Ltd | WesternAirways | 4 | Maintenance | Aircraft |
| Western Manufacturing (Reading) Ltd | WesternManufacturing | 74 | Fabrication | Machining |
| Western Precision Co Ltd | WesternPrecision | 1 | Fabrication | Precision Engineering |
| Westinghouse Brake & Signal Co Ltd | Westinghouse | 8 | Components | Electrical |
| Westland | Westland | 697 | Aircraft Manufacturers | |
| Westley Smith & Co Ltd | WestleySmith | 1 | Components | Gears |
| Westminster Airways Servicing Ltd | Westminster | 2 | Manufacturing | Precision Engineering |
| Weston Hurlin Co | WestonHurlin | 4 | Aeronautical Engineers | |
| Westool Ltd | Westool | 1 | Components | Electrical |
| Westward Airways Ltd | Westward | 1 | Air Transport | Airlines |
| Westway Models Ltd | WestwayModels | 13 | Models | Display |
| Weyburn Engineering Co Ltd | WeyburnEng | 44 | Components | |
| W.G.Evans & Sons | WGEvans | 2 | Manufacturing | Components |
| W.G.Tarrant | WGTarrant | 3 | Aeronautical Engineers | |
| W.G.Walker & Co | WGWalker | 2 | Testing | Test Equipment |
| W.H.Allen & Son & Co Ltd | WHAllen | 6 | Engine Manufacturers | |
| W.Harbrow | WHarbrow | 11 | Structures | Hangars |
| W.H.Briscoe | WHBriscoe | 2 | Manufacturing | Components |
| Wheeler & Sons | WheelerSons | 1 | Factory | Air Conditioning |
| W. Henshall & Sons (Addlestone) Ltd | WHenshall | 34 | Finishes | Galley Equipment |
| W.H.Ewen | WHEwen | 8 | Training | Flying School |
| W.H.Fulford | WHFulford | 1 | Engineering Equipment | Limit Gauges |
| Whitehall Paints Ltd | WhitehallPaints | 1 | Finishes | Ice Protection |
| Whitehead Aircraft Co Ltd | Whitehead | 15 | Aircraft Manufacturers | |
| Whitehouse Industries | Whitehouse | 14 | Fasteners | AGS |
| Whiteley Electrical Radio Ltd | Whiteley | 18 | Components | Electrical |
| Whitely Products Ltd | WhitelyProducts | 1 | Manufacturing | AGS |
| Whiteman & Moss | WhitemanMoss | 28 | Fasteners | AGS |
| Whitworth Gloster Aircraft Ltd | WhitworthGloster | 1 | Aircraft Manufacturers | Missiles |
| W.H.Paul Limited | WHPaul | 2 | Fabrication | Steel |
| W.H.Sanders (Electronics) Ltd | WHSanders | 3 | Manufacturing | Electronics |
| W.H.Willcox & Co Ltd | WHWillcox | 2 | Components | Universal Joints |
| Wickman Of Coventry | WickmanCoventry | 1 | Factory | Logistics |
| Wicki. Foster, Wikner Aircraft Co Ltd | Wicko | 10 | Aircraft Manufacturers | |
| Wideroes Flyveselskap A/S | Wideroe | 1 | Air Transport | Airlines |
| Wiggins Teape | WigginsTeape | 2 | Manufacturing | Paper |
| White & Company Ltd. J. Samuel | Wight | 24 | Literature | Book |
| Wilfley Company Ltd | Wilfley | 11 | Structures | Hangars |
| Wilkins, Cambell & Co Ltd | WilkinsCambell | 1 | Chemicals | Wax |
| Wilkinson Heywood & Clatk Ltd | WilkinsonHeywood | 7 | Finishes | Paints |
| Willans & Robinson Ltd | WillansRobinson | 1 | Manufacturing | Castings |
| Willcocks, Evans & Fletcher Ltd | WillcocksEvans | 2 | Manufacturing | Sheet Metal Work |
| Willesden Varnish Company Ltd. The | WillesdenVarnish | 1 | Finishes | Varnish |
| William Asquith Ltd | WilliamAsquith | 1 | Engineering Equipment | Machine Tools |
| William Heaton & Sons Ltd | WilliamHeaton | 2 | Materials | Fabrics |
| William Jessop & Sons Ltd | WilliamJessop | 49 | Materials | Steel |
| William Mallinson & Sons Ltd | WilliamMallinson | 40 | Manufacturing | Sheet Metal Work |
| William Moss & Sons Ltd | WilliamMoss | 9 | Ground Equipment | Servicing Platforms |
| William Neal & Son | WilliamNeal | 1 | Structures | Hangars |
| William Oldroyd & Sons Ltd | WilliamOldroyd | 2 | Chemicals | Adhesives |
| William-Pinney Ltd | WilliamPinney | 1 | Components | Fuel Tanks |
| William Robertson Ltd | WilliamRobertson | 1 | Manufacturing | Steel |
| Williams & James (Engineers) Ltd | WilliamsJames | 11 | Ground Equipment | Pneumatics |
| Williamson Manufacturing Co Ltd | Williamson | 151 | Role Equipment | Cameras |
| Williams & Williams Ltd | WilliamsWilliams | 4 | Manufacturing | Sheet Metal Work |
| William Warne & Company Ltd | WilliamWarne | 5 | Components | Ducting |
| Willson Brothers | WillsonBros | 4 | Clothing | Flying Clothing |
| Wills Pressure Filled Joint Rings | WillsRings | 1 | Components | Seals |
| Wilmot Breeden Ltd | WilmotBreeden | 12 | Manufacturing | Presswork |
| Wilson Bros & Gibson | WilsonBros | 6 | Aircraft Manufacturers | |
| Wilson & Kyle | WilsonKyle | 1 | Engineering Equipment | Jigs |
| Windak Ltd | Windak | 21 | Clothing | Leisure |
| Windovers Ltd | Windovers | 9 | Manufacturing | Sheet Metal Work |
| Wingard (M.A.) Ltd | Wingard | 1 | Aeronautical Engineers | Precision Engineering |
| Winget Ltd | Winget | 9 | Fabrication | Jigs |
| Wingfiled Smith. S.C. | WingfiledSmith | 4 | Fasteners | AGS |
| Winstay Holdings Ltd | Winstay | 1 | Factory | Air Conditioning |
| Winston Electronics Ltd | WinstonElectronics | 2 | Airfields | Radar |
| Wirek (Electronics) Ltd | Wirek | 1 | Testing | Tape Recorders |
| Wire-Wove Roofing Co | WireWove | 11 | Structures | Hangars |
| Witney & Oxford Aero Club | WitneyOxford | 3 | Training | Flying School |
| Witton,Witton & Co | Witton | 1 | Manufacturing | Components |
| W.J.Bithell Ltd | WJBithell | 1 | Manufacturing | Steel |
| W & J.Knox | WJKnox | 1 | Materials | Linen |
| W.M.Kenyon & Sons Ltd | WMKenyon | 1 | Manufacturing | Rope |
| Wolseley Tool & Motor Car Ltd | Wolseley | 45 | Engine Manufacturers | |
| Wolverhampton Aviation | Wolverhampton | 2 | Repairs | Stockists |
| Wondegrip Products Ltd | Wondegrip | 8 | Finishes | Non Slip |
| Woodhouse & Mitchell Ltd | WoodhouseMitchell | 2 | Engineering | Welding |
| Woodley Airfield | Woodley | 1 | Airfields | Flying School |
| Woodside Engineering Company Ltd | WoodsideEngineering | 6 | Manufacturing | Components |
| Woodwards Spring & Washer Co | Woodwards | 2 | Components | Springs |
| Wooler Engineering Co Ltd | Wooler | 1 | Manufacturing | Machining |
| Worcester Sheet Metal & Pressings Co | WorcesterSheetmetal | 3 | Manufacturing | Sheet Metal Work |
| Worldwin Pistons Ltd | Worldwin | 3 | Components | Pistons |
| Worms Aircraft Construction Co | Worms | 4 | Manufacturing | Components |
| Wortman & Son Ltd. B. | Wortman | 2 | Aircraft Manufacturers | |
| Wright Aeronautical Corporation | Wright | 68 | Engine Manufacturers | |
| Wright Anderson & Co Ltd | WrightAnderson | 18 | Airfields | Hangars |
| Wrightson & Pearse | WrightsonPearse | 8 | Sales & Brokerage | |
| Wrightways Ltd | Wrightways | 9 | Aerial Work | Maintenance |
| W.S.Electronics (Production) Ltd | WSElectronics | 3 | Avionics | Radio |
| W.S.Shackleton Ltd | WSShackleton | 47 | Aircraft Suppliers | Aircraft Sales |
| W.Suckling & Sons | WSuckling | 3 | Manufacturing | Stampings |
| W.T.Clark & Co | WTClark | 2 | Manufacturing | Sheet Metal Work |
| W.T.Henley's Telegraph Works Co Ltd | WTHenly | 2 | Engineering Equipment | Soldering |
| W.T.Nicholson & Clipper Co Ltd | WTNicholson | 1 | Survival Equipment | Belts |
| W.Wesson & Co | WWesson | 3 | Materials | Steel |
| W.W.Hill, Son & Wallace Ltd | WWHill | 1 | Materials | Steel |
| W.Wilson & Sons (London) Ltd | WWilson | 22 | Materials | Aluminium Alloys |
| Wycombe Aircraft Constructors Ltd | WycombeAircraft | 2 | Aircraft Manufacturers | |
| Wynn & Co. E.D. | Wynn | 16 | Aircraft Parts | Flight Instruments |
