Sorted by name. Group parents are marked.
| ITC PACKAGING GROUP SL lapsed | IBI |
| ITF MEDILAB FARMA SA | Alcobendas |
| ITF RESEARCH PHARMA, S.L. | Alcobendas |
| ITI CIGARS S.L | Madrid |
| ITINERE INFRAESTRUCTURAS SA group parent | Bilbao |
| ITP EXTERNALS SL | Derio |
| ITURRI SA | SEVILLA |
| IURISTEL S.A. | Barcelona |
| IVALIA ESTETICA MEDICA, SOCIEDAD LIMITADA lapsed | LAS PALMAS DE GRAN CANARIA |
| IVASON INVEST S.L. | Barcelona |
| IVECO ESPAÑA SL | MADRID |
| IVI BARCELONA S.L. | Barcelona |
| IVI MADRID SL | Madrid |
| IVI RMA GLOBAL SL | Valencia |
| IZERTIS SA | Gijón |
| IZERTIS VENTURES SL | Madrid |
| J A AROCHA SOCIEDAD LIMITADA | LAS PALMAS DE GRAN CANARIA |
| J J SHOPS MADRID SL lapsed | LEGANÉS |
| J JUAN S.A. | Gavà |
| J R INVESTMENTS ROS S.L. group parent | Barcelona |
| J&C PRIME BRANDS S.L. | Sant Sadurní d'Anoia |
| J. VILASECA S.A. | Capellades |
| J.G. AUTOMOTIVE, S.A. | Alcobendas |
| JAENDA SL lapsed | Mont-ras |
| JAESURE SL | Madrid |
| JAFER ENTERPRISES R&D S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| JAIME SORIANO SA EN LIQUIDACION group parent lapsed | MADRID |
| JAIOLAN SL group parent | Donostia/San Sebastián |
| JALAEBRO SOCIEDAD ANONIMA | Zaragoza |
| JANDIA PLAYA SOCIEDAD ANONIMA | MORRO JABLE |
| JANSSEN-CILAG, S.A. | MADRID |
| JAPOFISH SA | Valencia |
| JAUSEN 2013 SL | Deba |
| JB CAPITAL MARKETS SOCIEDAD DE VALORES SA | Madrid |
| JB FILIALES Y PARTICIPADAS SL | Madrid |
| JCM TECHNOLOGIES SAU | VIC |
| JEALSA FOODS SA | Boiro |
| JEALSA RIANXEIRA 2 S.L.U. lapsed | Boiro |
| JEMA ENERGY, S.A. lapsed | Lasarte-Oria |
| JERA AVANZA SL | Murcia |
| JEZZINE UNO SL | Madrid |
| JG FINANTIAL AND STOCKS INVESTMENT SL group parent | Alcobendas |
| JHK TRADER, S.L. | Fuenlabrada |
| JILGUERO SOLAR SL | Madrid |
| JILOCA INDUSTRIAL, SA | Santa Eulalia |
| JIS CAPITAL GLOBAL SL group parent | Zaragoza |
| JJJ320 GROUP SL group parent | MURCIA |
| JMAC, S.L. lapsed | Madrid |
| JME VENTURE CAPITAL SGEIC SA | Madrid |
| JOAN COLLELL PASCUAL S.L. | Cornellà de Llobregat |
| JOAQUIN DAVILA Y COMPAÑIA SA | Vigo |
| JOBELSA SOFT-TRIM SL lapsed | Benicasim/Benicàssim |
| JOBS AND TALENT S.L | Madrid |
| JOCS VALENCIANS SA | Elche/Elx |
| JOFEMAR SA | Peralta/Azkoien |
| JOHNSON & JOHNSON SA | MADRID |
| JOHNSON CONTROLS-HITACHI AIR CONDITIONING SPAIN S.A. | Vacarisses |
| JORCAS S.A. lapsed | Tàrrega |
| JORDAN ARAGON SOCIEDAD ANONIMA | Figueruelas |
| JORDAN MARTORELL S.L. lapsed | Martorell |
| JORGE ENERGY S.L. | Zaragoza |
| JORGE PORK MEAT S.L. | Zaragoza |
| JORGE S.L. group parent | Zaragoza |
| JORJAVI CREW SOCIEDAD LIMITADA | Valencia |
| JOSE ESTEVEZ SA | Jerez de la Frontera |
| JOSE JURADO SA | Madrid |
| JOSE LUIS MONTOSA SL lapsed | Vélez-Málaga |
| JOSE ROYO SOCIEDAD LIMITADA | Valencia |
| JOSEL S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| JOSMAR INDA GROUP SL | Aguilar de la Frontera |
| JOT INTERNET MEDIA ESPAÑA SL | Madrid |
| JOTUSA 2000 SL group parent | MOLINA |
| JOYE MEDIA S.L. group parent lapsed | Barcelona |
| JOYERÍA TOUS S.A. | Manresa |
| JPV INVERSIONES S.L. lapsed | Sant Cugat del Vallès |
| JSS REAL ESTATE SOCIMI, S.A. lapsed | Madrid |
| JT HIRING EMPRESA DE TRABAJO TEMPORAL SL | Madrid |
| JUAN IGUARAN SL lapsed | Leaburu |
| JUAN NAVARRO GARCIA, S.A. | Murcia |
| JUAN RAMON LOZANO INFINITY, S.L. group parent | Madrid |
| JUAN RAMON LOZANO SOCIEDAD ANONIMA | Villarrobledo |
| JUAN Y JUAN INDUSTRIAL SL | Vilallonga/Villalonga |
| JUAN Y JUAN SOCIEDAD LIMITADA group parent | Vilallonga/Villalonga |
| JUBA PERSONAL PROTECTIVE EQUIPMENT SL | LOGROÑO |
| JUGUETERIA NIKKI, S.L. | Palmas de Gran Canaria, Las |
| JULIANO BONNY GÓMEZ,S.L. lapsed | Palmas de Gran Canaria, Las |
| JULIO CRESPO CANARIAS, S.A. | Güímar |
| JULIO CRESPO, S.A. group parent | Valdemoro |
| JULIUS BAER SERVICES (SPAIN) S.L. | Madrid |
| JUMO SERVICIOS INMOBILIARIOS, S.A. | Ordes |
| JUNCTION PARQUE ALAMEDA, SL | Madrid |
| JUNCTION PARQUE CASTELLON S.L. | Madrid |
| JUNCTION PARQUE GRANADA, S.L. | Madrid |
| JUNCTION PARQUE HABANERAS S.L. | Madrid |
| JUNCTION PARQUE HUELVA SL | Madrid |
| JUNCTION PARQUE MERIDA, S.L. | Madrid |
| JUNCTION PARQUE MOTRIL SL | Madrid |
| JUNCTION PARQUE PRINCIPADO S.L. | Madrid |
| JUNCTION PARQUE VILLANUEVA 1, S.L. lapsed | Madrid |
| JUNGLE BOX,S.L. lapsed | Madrid |
| JUNGLE21 SA | MADRID |
| JUNO POWER S.L.(SOCIEDAD UNIPERSONAL) | Badalona |
| JUPITER INVERSIONES, SICAV, SA lapsed | Madrid |
| JURISA INVESTMENTS, S.L. | Madrid |
| JUSEDE INVESTMENTS SL group parent | SADA |
| JUVER ALIMENTACION, S.L. | Murcia |
| KADION ESPECIALIDADES QUIMICAS S.L. | Barcelona |
| KAIKU CORPORACION ALIMENTARIA S.L | Donostia/San Sebastián |
| KAIKU INTERNACIONAL S.L | Donostia/San Sebastián |
| KAIXO BONDCO TELECOM, S.A. | Pozuelo de Alarcón |
| KAIXO TELECOM, S.A. | Donostia/San Sebastián |
| KAIZAHARRA CORPORACION EMPRESARIAL SL group parent | Bilbao |
| KALMAR SPAIN CARGO HANDLING SOLUTIONS SA | ALGECIRAS |
| KAMAX SL lapsed | MUSEROS |
| KAO CHEMICALS EUROPE S.L. (SOCIEDAD UNIPERSONAL) | Barberà del Vallès |
| KAO CORPORATION S.A. | Barberà del Vallès |
| KARDHAM GABITECO SA | Madrid |
| KARTERA 1 SL | Bilbao |
| KARTIKEYA RAMBLAS S.L. (SOCIEDAD UNIPERSONAL) lapsed | Barcelona |
| KATELAIE INVERSIONES S.L. | Barcelona |
| KAUDAL CONTROL Y GESTION DE PROYECTOS S.L.U. | Santa Cruz de Tenerife |
| KAUDAL TECHNOLOGY INVESTMENT, S.L. lapsed | Leganés |
| KDP PARQUESUR RESTAURACION SL lapsed | Madrid |
| KEEPER INVERSIONES, SICAV, S.A. lapsed | Madrid |
| KELAG INTERNATIONAL MADRID SL | Madrid |
| KEMETYL IADA S.L.(SOCIEDAD UNIPERSONAL) | Vilobí del Penedès |
| KEOPS CORPORACION EMPRESARIAL, S.A. group parent | Alcobendas |
| KERABEN GRUPO SAU | Nules |
| KERAMEX SA | Vila-real |
| KERN PHARMA S.L. | Terrassa |
| KEROS CERAMICA SL lapsed | Onda |
| KERRY IBERIA TASTE & NUTRITION SL | Pinto |
| KEYLAB S.L. (SOCIEDAD UNIPERSONAL) | Rubí |
| KEYTEL SOCIEDAD ANONIMA | Madrid |
| KHEME CHEMICAL SL | Sagunto/Sagunt |
| KILOMETROS DE PIZZA SL lapsed | Madrid |
| KIMBERLY CLARK SL | MADRID |
| KINANOS SOLAR, SL | Madrid |
| KING REGAL SA | Oliva |
| KINSAN TRADE SL | Nules |
| KINVERIX CAPITAL, S.L. | Rozas de Madrid, Las |
| KION RENTAL SERVICES SA | Barcelona |
| KITCHEN BATH VENTURES, S.L. group parent | Madrid |
| KIVET VETERINARIA, S.L. | Madrid |
| KIWI INVER-CAP S.L. | Barcelona |
| KIWOKO PET SOCIEDAD LIMITADA | Alcorcón |
| KIZOROS, S.L. | Leganés |
| KKR INCEPTION BIDCO, S.L.U. lapsed | MADRID |
| KLINGER SPAIN SA | Madrid |
| KLUBER LUBRICATION GMBH IBERICA SOCIEDAD EN COMANDITA | Parets del Vallès |
| KME SPAIN SA | BARCELONA |
| KNET COMUNICACIONES SLU | LOGROÑO |
| KNORR-BREMSE ESPAÑA SA | Getafe |
| KNOXTYL DESIGN SL lapsed | Mallabia |
| KONECTA BTO, S.L. | Madrid |
| KONECTA MEDIACION S.L. | Madrid |
| KORE DESARROLLO CORPORATIVO SL | Huarte/Uharte |
| KORE HAUS SL lapsed | Valladolid |
| KOREA HOME APPLIANCES S.L. (SOCIEDAD UNIPERSONAL) lapsed | Manlleu |
| KORIAN CONCESIONES 2022 SL lapsed | Benalmádena |
| KOSORKUNTZA AGRUPACION DE INTERES ECONOMICO lapsed | BILBAO |
| KPMG ASESORES S.L. | Madrid |
| KPMG CES S.L. lapsed | Madrid |
| KPMG S.A. group parent | Madrid |
| KPMG TRANSFORMACION Y TECNOLOGIA SL | Madrid |
| KRASIS CONSULTING, S.L. | Vigo |
| KREAN SHARING FUTURE, S.L. | Arrasate/Mondragón |
| KREAN, S.COOP group parent | Arrasate/Mondragón |
| KRION SOLID SURFACE SA | Vila-real |
| KRONE-MUR SERVIFRIO SL lapsed | Alhama de Murcia |
| KRONOSNET CX BIDCO 2022 SL lapsed | Madrid |
| KRONOSNET TOPCO, S.L. group parent | Madrid |
| KRONOSPAN, S.L. | Burgos |
| KRUSTAGROUP, S.A.U. | Huelva |
| KS SPAIN PARK THETA SL lapsed | Bilbao |
| KSB ITUR SPAIN SA | ZARAUTZ |
| KUIPER CONSULTORIA E INVERSIONES, S.L | Logroño |
| KUKA IBERIA S.A. | Vilanova i la Geltrú |
| KUMO NETWORKS, S.A.U. | Madrid |
| KURUMA SPORT, S.A. | Madrid |
| KUTXABANK ASEGURADORA COMPAÑIA DE SEGUROS Y REASEGUROS SA | Bilbao |
| KUTXABANK EMPRESTITOS SA | Bilbao |
| KUTXABANK GESTION SGIIC SA | Bilbao |
| KUTXABANK INVESTMENT SOCIEDAD DE VALORES SA | Bilbao |
| KUTXABANK PENSIONES SOCIEDAD ANONIMA ENTIDAD GESTORA DE FONDOS DE PENSIONES | Bilbao |
| KUTXABANK SA | Bilbao |
| KUTXABANK VIDA Y PENSIONES COMPAÑIA DE SEGUROS Y REASEGUROS SA | Bilbao |
| KUUPS DESIGN INTERNATIONAL SL | VALENCIA |
| KW TARIFA SA | Madrid |
| KW VELAZQUEZ PROPCO 1 SL. lapsed | MADRID |
| KYLECRESS, S.L. | Murcia |
| KYNDRYL ESPAÑA SA | Madrid |
| KYOCERA DOCUMENT SOLUTIONS ESPAÑA S.A | Rozas de Madrid, Las |
| L'ANTIC COLONIAL SA | Vila-real |
| L'OREAL ESPAÑA SA | Madrid |
| LA ALCOHOLERA DE LA RIOJA, EBRO Y DUERO, S.A. | Cenicero |
| LA BIDASOTARRA SA | Madrid |
| LA CALDERA ENERGIA BURGOS SL | Madrid |
| LA FE PREVISORA COMPAÑIA DE SEGUROS SA | Vigo |
| LA FINCA GLOBAL ASSETS SOCIMI SA | Pozuelo de Alarcón |