Sorted by name. Group parents are marked.
| INTERMONEY VALORES SOCIEDAD DE VALORES SA | Madrid |
| INTERMUNDIAL XXI, S.L. | Madrid |
| INTERNACIONAL DE COMERCIO Y SERVICIOS SL, UNIPERSONAL | Marín |
| INTERNACIONAL DE INGENIERIA, S.A. lapsed | Madrid |
| INTERNACIONAL DE PIPELINES DAIP, S.L. | Madrid |
| INTERNACIONAL DE SERVICIOS Y SUMINISTROS, S.L. | Madrid |
| INTERNACO SERVICIOS Y MEDIO AMBIENTE, S.L. lapsed | Ordes |
| INTERNACO, S.A. | Ordes |
| INTERNATIONAL BRITISH EDUCATION GROUP, SOCIEDAD LIMITADA lapsed | Madrid |
| INTERNATIONAL BRON METAL SA | Larrabetzu |
| INTERNATIONAL BUSINESS MACHINES SA | MADRID |
| INTERNATIONAL CONSOLIDATED AIRLINES GROUP, S.A. group parent | Madrid |
| INTERNATIONAL CUBIC BUILDING SL group parent | Premià de Mar |
| INTERNATIONAL EDUCATIONAL PARNERTSHIP S.L. lapsed | Eliana, l' |
| INTERNATIONAL FOAM TECHNOLOGIES SPAIN SL lapsed | MADRID |
| INTERNATIONAL FORWARDING SOCIEDAD LIMITADA lapsed | Sedaví |
| INTERNATIONAL HOLDING GROUP VERTISOL WEAVERS S.L. group parent | Parets del Vallès |
| INTERNATIONAL PAPER MADRID MILL SL | Fuenlabrada |
| INTERNATIONAL PROJECT CARGO S.L. (SOCIEDAD UNIPERSONAL) | Castelldefels |
| INTERNATIONAL SOUND AND VISION WORLDWIDE, S.L. lapsed | Sada |
| INTERNATIONAL SURETIES AND INSURANCE SL | Nerja |
| INTERPARKING HISPANIA S.A. lapsed | Barcelona |
| INTERPROVINCIAL, SL | Madrid |
| INTERPUR CHEMICALS S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| INTERPUR VENTURES S.L. | Barcelona |
| INTERSPORT RETAIL ONE S.L. (SOCIEDAD UNIPERSONAL) lapsed | Rubí |
| INTERSPORT S.L. lapsed | Rubí |
| Interstock Development Spain SL | DONOSTIA- SAN |
| INTERTRANSPORTES SAAVEDRA SL | Pinto |
| INTERTRUST (SPAIN), S.L. lapsed | Madrid |
| INTERXION ESPAÑA SL | MADRID |
| INTRALINKS SPAIN SL | MADRID |
| INTRAMUNDANA S.A. group parent | Roca del Vallès, La |
| INTRUM HOLDING SPAIN, SA lapsed | Madrid |
| INURBAN , S.A. | Yecla |
| INV COMPAÑIA DE SERVICIOS INTEGRALES S.L. lapsed | Madrid |
| INV PROTECCION S.L. lapsed | Madrid |
| INV SISTEMAS Y SOLUCIONES DE SEGURIDAD, S.L. lapsed | Madrid |
| INV VIGILANCIA SOCIEDAD LIMITADA lapsed | Madrid |
| INVACESA, S.L.U. | Cenicero |
| INVAL 2012 S.L. lapsed | Madrid |
| INVATRA ALCÁZAR, S.L. | Alcázar de San Juan |
| INVECAP INVERSIONES INMOBILIARIAS SL | Madrid |
| INVENTEC PERFORMANCE CHEMICALS ESPAÑA SOCIEDAD ANONIMA | Sagunto/Sagunt |
| INVERAHORRO SOCIEDAD LIMITADA | Madrid |
| INVERAMA SL group parent | Peralada |
| INVERAVANTE INVERSIONES UNIVERSALES, SL group parent | Coruña, A |
| INVERAVANTE SELECTA, S.L.U. | Coruña, A |
| INVERBAN INVESTMENTS SL | MADRID |
| INVERBEIRA SOCIEDAD DE PROMOCION DE EMPRESAS, S.A. | Laudio/Llodio |
| INVERBLOIS S.L. | Mérida |
| INVERBLYP SL | Carreño |
| INVERCARTERA INTERNACIONAL, S.L. lapsed | Madrid |
| INVERCAT GLOBAL S.L.(SOCIEDAD UNIPERSONAL) group parent | Prat de Llobregat, El |
| INVERCONDESTABLE, S.L. lapsed | Totana |
| INVERCOR PATRIMONIO S.L. group parent | Pozuelo de Alarcón |
| INVERCYSEX SL | Cáceres |
| INVEREADY ASSET MANAGEMENT, S.G.E.I.C, S.A. | Donostia/San Sebastián |
| INVEREADY CAPITAL COMPANY S.L. | Donostia/San Sebastián |
| INVEREADY EVERGREEN, S.C.R S.A. | Donostia/San Sebastián |
| INVEREADY GP HOLDING, S.C.R. S.A. | Donostia/San Sebastián |
| INVEREADY PUBLIC MARKETS SGIIC SA. | Madrid |
| INVEREADY TAX LEASE S.L. lapsed | Barcelona |
| INVERFAGO, S.L. group parent | Coruña, A |
| INVERFIATC, S.A. lapsed | Barcelona |
| INVERGAMING GRUP, S.L. lapsed | Barcelona |
| INVERLASA SL group parent | Madrid |
| INVERLASIK MAD II SL lapsed | Madrid |
| INVERLIN SL | Murcia |
| INVERNI S.L. | Madrid |
| INVERPRO DESENVOLUPAMENT S.L. lapsed | Terrassa |
| INVERSALIA PATRIMONIO SOSTENIBLE, S.L. group parent | Teruel |
| INVERSALIA PATRIMONIO, S.L. | Teruel |
| INVERSEMA BOLSA SA | Catí |
| INVERSION GLOBAL 9876, SICAV, S.A | Madrid |
| INVERSIONES ABANON S.L. group parent | Sant Cugat del Vallès |
| INVERSIONES ANTONIO ARMAS, S.L. group parent | Santa Cruz de Tenerife |
| INVERSIONES ANUDA SOCIEDAD DE RESPONSABILIDAD LIMITADA group parent | PEDRERA |
| INVERSIONES BARGUE SL | Madrid |
| INVERSIONES BASTION SL | Valencia |
| INVERSIONES CAPITAL GLOBAL SA | Boadilla del Monte |
| INVERSIONES CERTIN 5 SL group parent | Madrid |
| INVERSIONES COTIZADAS DEL MEDITERRANEO SL | Alicante/Alacant |
| INVERSIONES COUÑAGO, SL lapsed | Vigo |
| INVERSIONES EL TOBAZO SOCIEDAD LIMITADA. | Sevilla |
| INVERSIONES EMPRESARIALES AYNA SOCIEDAD LIMITADA | Madrid |
| INVERSIONES EMPRESARIALES VAPAT SL group parent | Madrid |
| INVERSIONES ENBERGAR XXI, S.L. | Vigo |
| INVERSIONES ENERGY MADRID, S.L. | Madrid |
| INVERSIONES EVFRAN SOCIEDAD LIMITADA group parent | Valencia |
| INVERSIONES FERSANGO S.A. lapsed | Madrid |
| INVERSIONES FINANCIERAS FERRINVEST SA | MADRID |
| INVERSIONES FINANCIERAS PERSEO SL | Bilbao |
| INVERSIONES FRIEIRA, S.L.U. | Coruña, A |
| INVERSIONES GRUPO ZRISER SL group parent | Valencia |
| INVERSIONES HIKI6, S.L. | Murcia |
| INVERSIONES HOTELERAS LA JAQUITA, S.A. | Santa Cruz de Tenerife |
| INVERSIONES HOTELERAS LANZAROTE SL | Puerto de la Cruz |
| INVERSIONES IBERHISPANIA SL | Madrid |
| INVERSIONES INDONESIA SOCIEDAD LIMITADA. lapsed | BILBAO |
| INVERSIONES INDUSTRIALES SERPIS SOCIEDAD LIMITADA | Alcoy/Alcoi |
| INVERSIONES INDUSTRIALES TXINDOKI SL lapsed | Donostia/San Sebastián |
| INVERSIONES JUVEI SL | SANTA CRUZ DE TENERIFE |
| INVERSIONES LA GROTTA SL | Madrid |
| INVERSIONES MARTIN DOMINGUEZ SL | Villanueva de la Concepción |
| INVERSIONES MONTELIMAR SL group parent | Valencia |
| INVERSIONES MULLER SL lapsed | Manacor |
| INVERSIONES NAIRA S.I.C.A.V. S.A. | Madrid |
| INVERSIONES NARBONA S.L. lapsed | Sevilla |
| INVERSIONES NIDER LEKIM SL | Bilbao |
| INVERSIONES PASCUAL SL group parent | Alcúdia |
| INVERSIONES PATRIMONIALES NOVES SL | Manzanares |
| INVERSIONES PATRIMONIALES PARQUE ASTUR 2017, S.A. lapsed | Madrid |
| INVERSIONES PAYSANDU S.L lapsed | Madrid |
| INVERSIONES PECCI S.L. | Carlota, La |
| INVERSIONES PEÑA CABARGA S.L. | Madrid |
| INVERSIONES PROPORSEG SL | Valverde del Majano |
| INVERSIONES PUENTEHIERRO SL | Santovenia de la Valdoncina |
| INVERSIONES RETABLO SL | Valencia |
| INVERSIONES RODRIGUEZ Y PELAEZ SL lapsed | Tineo |
| INVERSIONES ROSMARINO, S.L. | Córdoba |
| INVERSIONES SANUMA 2002 S.L. group parent | Barcelona |
| INVERSIONES SOLARES 2006 SL lapsed | Alcúdia |
| INVERSIONES SOTORREDONDO SL | Puebla de Montalbán, La |
| INVERSIONES SULLER SL group parent | Vilafamés |
| INVERSIONES VALIX 6 S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| INVERSIONES Y EXPLOTACIONES TURISTICAS SA | Madrid |
| INVERSIONES Y GESTIONES MUSER S.A. lapsed | Madrid |
| INVERSIONES Y PARCELACIONES URBANAS SOCIEDAD ANONIMA | Teguise |
| INVERSIONES Y PROMOCIONES GILARRANZ SL | Torrejón de la Calzada |
| INVERSIONES Y PROYECTOS SEVILLA PLAZA SA | Sevilla |
| INVERSIONES Y SERVICIOS PUBLICITARIOS S.L. group parent | Barcelona |
| INVERSIONES ZARPI SL | Pozuelo de Alarcón |
| INVERSIONES ZUBIATZU, S.A. group parent | Elgoibar |
| INVERSIONES ZULU SL group parent | Madrid |
| INVERSIONS 395 SL | Agramunt |
| INVERSIONS DOTZE S.L. | Sabadell |
| INVERSIONS ELOIGARA S.L. group parent | Barberà del Vallès |
| INVERSIONS FENEC SL group parent | Madrid |
| INVERSIONS I SERVEIS AMBIENTALS SL | Palma de Mallorca |
| INVERSIONS IMMOBILIARIES 1898 SL | Marratxí |
| INVERSIS GESTION SA SOCIEDAD GESTORA DE INSTITUCIONES DE INVERSION COLECTIVA | Madrid |
| INVERSORA DE HOTELES VACACIONALES SA | Palma de Mallorca |
| INVERSORA MOBILIARIA ESPAÑOLA SL | Madrid |
| INVERSORA VIRO, S.L. | Zaragoza |
| INVERTUR HELSAN, S.L.U. group parent | Palmas de Gran Canaria, Las |
| INVEST LA JONQUERA SL group parent lapsed | Jonquera, La |
| INVEST ZIUR SL | Valencia |
| INVESTALBERT SICAV SA lapsed | MADRID |
| INVESTIGACIONES DE BASE AEROESPACIAL Y SEGURIDAD, S.L. | Torrejón de Ardoz |
| INVESTMENT FAMBA CORPORATION INTERNATIONAL SL group parent | Madrid |
| INVESTMENT HOLDINGS 1857, S.L. | Boadilla del Monte |
| INVESTOR VM 40 SICAV S.A. lapsed | Madrid |
| INVIZA SA | Tolosa |
| INYPSA URBAN DEVELOPMENT, S.L lapsed | Alcobendas |
| INZOFRA S.L. | Hospitalet de Llobregat, L' |
| IOF HOLDING, S.L. | Madrid |
| IONFARMA S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| IPA CAPITAL S.L. group parent lapsed | Carpio, El |
| IPARCOFFEE 2008 SL lapsed | Tineo |
| IPARK ESTACIONAMIENTOS Y SERVICIOS DE MOVILIAD, S.A. lapsed | Vitoria-Gasteiz |
| IPARLAT, S.A. | Urnieta |
| IPOSTAR SL lapsed | Santa Marina del Rey |
| IPOSTRAD SECURITIES SL lapsed | Santa Marina del Rey |
| IRIDION SOLUCIONS IMMOBILIARIES S.L. (SOCIEDAD UNIPERSONAL) lapsed | Terrassa |
| IRIDIUM CONCESIONES DE INFRAESTRUCTURAS, S.A | Madrid |
| IRINEO ENERGIA SL | MADRID |
| IRIS EKAMAT S.L. (SOCIEDAD UNIPERSONAL) lapsed | Barcelona |
| IRIS GLOBAL SOLUCIONES DE ASISTENCIA SA lapsed | Madrid |
| IRIS GLOBAL SOLUCIONES DE PROTECCION SEGUROS Y REASEGUROS S.A | Madrid |
| IRIS GLOBAL SOLUCIONES SL | Madrid |
| IRIZAR E-MOBILITY, SL | Aduna |
| IRIZAR S. COOP group parent | Ormaiztegi |
| IRONTEC INTERNET Y SISTEMAS SOBRE GNU LINUX SL lapsed | Bilbao |
| IRRITEC IBERIA SA | Carmona |
| ISABA TRADE BUSINESS S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| ISAI FINANCE SL | Nerja |
| ISASTUR INGENIERIA SA | Llanera |
| ISC GREENFIELD 7 SL | Madrid |
| ISKAY PET, S.L group parent | Alcorcón |
| ISLA BELLA SL lapsed | Santa Cruz de Tenerife |
| ISLA CANELA SA | Madrid |
| ISLA DE LOS BUQUES, SA | Madrid |
| ISLA MARINA, S.L. | Palmas de Gran Canaria, Las |
| ISLAND SKY SLU | Adeje |
| ISLASFALTO SL | Santa Eulària des Riu |
| ISLASUR SA lapsed | Isla Mayor |
| ISLAZUL CENTRO COMERCIAL SL | Madrid |
| ISLAZUL SHOPPING SL. | MADRID |
| ISONELL SL | Ayala/Aiara |
| ISOTRON SA | Llanera |
| ISOVOLTA SA | Barberà del Vallès |
| ISOWAT MADE, S.L. lapsed | Coruña, A |
| ISOWAT, S.L. lapsed | Coruña, A |
| ISP DIGITAL S.L. (SOCIEDAD UNIPERSONAL) | Barcelona |
| ISPD NETWORK, S.A. | Madrid |
| ISTOBAL MANUFACTURING SPAIN SOCIEDAD LIMITADA | Alcúdia, l' |
| ISTOBAL SA | Alcúdia, l' |
| ITALFARMACO, S.A. | Alcobendas |
| ITALTEL SA | Alcobendas |