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IBEX 35
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Top IBEX 35 Companies by Market Cap and Stocks in 2026

This is the list of the largest public listed companies in the IBEX 35 index ranked by market capitalization, together with links to their reference stock, sector and industry.

IBEX 35 Chart & Analysis

Top IBEX 35 Companies Ranking by Market Cap as of Jan. 1, 2026

Ranking Company Stock Market Cap (USD) Country Sector Industry
1 Industria de Diseño Textil, SA ITX $206.20 B Spain Spanish Consumer Discretionary Spanish Apparel Retail
2 Banco Santander, SA SAN $176.84 B Spain Spanish Financials Spanish Banks—Diversified
3 Iberdrola, SA IBE $146.18 B Spain Spanish Utilities Spanish Utilities—Diversified
4 Banco Bilbao Vizcaya Argentaria, SA BBVA $136.54 B Spain Spanish Financials Spanish Banks—Diversified
5 CaixaBank, SA CABK $87.45 B Spain Spanish Financials Spanish Banks—Regional
6 Ferrovial, SA FER $46.57 B Spain Spanish Industrials Spanish Infrastructure Operations
7 Aena S.M.E., SA AENA $39.11 B Spain Spanish Industrials Spanish Airports & Air Services
8 Endesa, SA ELE $37.95 B Spain Spanish Utilities Spanish Utilities—Regulated Electric
9 ArcelorMittal MTS $35.61 B Luxembourg Luxembourg Basic Materials Luxembourg Steel
10 Amadeus IT Group, SA AMS $31.77 B Spain Spanish Technology Spanish Information Technology Services
11 Naturgy Energy Group, SA NTGY $29.10 B Spain Spanish Utilities Spanish Utilities—Regulated Gas
12 International Consolidated Airlines Group, SA IAG $25.85 B Spain Spanish Industrials Spanish Airlines
13 ACS, Actividades de Construcción y Servicios, SA ACS $25.72 B Spain Spanish Industrials Spanish Engineering & Construction
14 Telefónica, SA TEF $23.07 B Spain Spanish Communication Services Spanish Telecom Services
15 Cellnex Telecom, SA CLNX $21.79 B Spain Spanish Communication Services Spanish Telecom Services
16 Repsol SA REP $21.37 B Spain Spanish Energy Spanish Oil & Gas Integrated
17 Banco de Sabadell, SA SAB $20.16 B Spain Spanish Financials Spanish Banks—Diversified
18 Mapfre, SA MAP $15.31 B Spain Spanish Financials Spanish Insurance—Diversified
19 Bankinter, SA BKT $15.29 B Spain Spanish Financials Spanish Banks—Regional
20 Siemens Gamesa Renewable Energy, SA SGRE $13.41 B

(Feb. 1, 2023)

 Spain Spanish Industrials Spanish Specialty Industrial Machinery
21 Acciona, SA ANA $12.21 B Spain Spanish Industrials Spanish Engineering & Construction
22 Indra Sistemas, SA IDR $10.21 B Spain Spanish Technology Spanish Information Technology Services
23 Red Eléctrica Corporación, SA REE $9.70 B Spain Spanish Utilities Spanish Utilities—Regulated Electric
24 Grifols, SA GRF $8.95 B Spain Spanish Healthcare Spanish Drug Manufacturers—General
25 MERLIN Properties SOCIMI, SA MRL $8.15 B Spain Spanish Real Estate Spanish REIT—Diversified
26 Fluidra, SA FDR $5.24 B Spain Spanish Industrials Spanish Specialty Industrial Machinery
27 CIE Automotive, SA CIE $4.27 B Spain Spanish Consumer Discretionary Spanish Auto Parts
28 Inmobiliaria Colonial, SOCIMI, SA COL $3.96 B Spain Spanish Real Estate Spanish REIT—Office
29 Enagás, SA ENG $3.85 B Spain Spanish Utilities Spanish Utilities—Regulated Gas
30 Acerinox, SA ACX $3.81 B Spain Spanish Basic Materials Spanish Steel

Top IBEX 35 Companies Ranking by Market Cap as of Jan. 1, 2026

1. Inditex

Company Profile: Industria de Diseño Textil, SA
Market Cap (USD): $206.20 B
Stock: ITX wb_incandescent
Country: Spain
Sector: Spanish Consumer Discretionary
Industry: Spanish Apparel Retail

2. Santander

Company Profile: Banco Santander, SA
Market Cap (USD): $176.84 B
Stock: SAN wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Banks—Diversified

3. Iberdrola, SA

Company Profile: Iberdrola, SA
Market Cap (USD): $146.18 B
Stock: IBE wb_incandescent
Country: Spain
Sector: Spanish Utilities
Industry: Spanish Utilities—Diversified

4. Banco Bilbao Vizcaya Argentaria, SA

Company Profile: Banco Bilbao Vizcaya Argentaria, SA
Market Cap (USD): $136.54 B
Stock: BBVA wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Banks—Diversified

5. CaixaBank, SA

Company Profile: CaixaBank, SA
Market Cap (USD): $87.45 B
Stock: CABK wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Banks—Regional

6. Ferrovial, SA

Company Profile: Ferrovial, SA
Market Cap (USD): $46.57 B
Stock: FER wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Infrastructure Operations

7. Aena S.M.E., SA

Company Profile: Aena S.M.E., SA
Market Cap (USD): $39.11 B
Stock: AENA wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Airports & Air Services

8. Endesa, SA

Company Profile: Endesa, SA
Market Cap (USD): $37.95 B
Stock: ELE wb_incandescent
Country: Spain
Sector: Spanish Utilities
Industry: Spanish Utilities—Regulated Electric

9. ArcelorMittal

Company Profile: ArcelorMittal
Market Cap (USD): $35.61 B
Stock: MTS wb_incandescent
Country: Luxembourg
Sector: Luxembourg Basic Materials
Industry: Luxembourg Steel

10. Amadeus IT Group, SA

Company Profile: Amadeus IT Group, SA
Market Cap (USD): $31.77 B
Stock: AMS wb_incandescent
Country: Spain
Sector: Spanish Technology
Industry: Spanish Information Technology Services

11. Naturgy Energy Group, SA

Company Profile: Naturgy Energy Group, SA
Market Cap (USD): $29.10 B
Stock: NTGY wb_incandescent
Country: Spain
Sector: Spanish Utilities
Industry: Spanish Utilities—Regulated Gas

12. International Consolidated Airlines Group, SA

Company Profile: International Consolidated Airlines Group, SA
Market Cap (USD): $25.85 B
Stock: IAG wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Airlines

13. ACS, Actividades de Construcción y Servicios, SA

Company Profile: ACS, Actividades de Construcción y Servicios, SA
Market Cap (USD): $25.72 B
Stock: ACS wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Engineering & Construction

14. Telefónica, SA

Company Profile: Telefónica, SA
Market Cap (USD): $23.07 B
Stock: TEF wb_incandescent
Country: Spain
Sector: Spanish Communication Services
Industry: Spanish Telecom Services

15. Cellnex Telecom, SA

Company Profile: Cellnex Telecom, SA
Market Cap (USD): $21.79 B
Stock: CLNX wb_incandescent
Country: Spain
Sector: Spanish Communication Services
Industry: Spanish Telecom Services

16. Repsol SA

Company Profile: Repsol SA
Market Cap (USD): $21.37 B
Stock: REP wb_incandescent
Country: Spain
Sector: Spanish Energy
Industry: Spanish Oil & Gas Integrated

17. Banco de Sabadell, SA

Company Profile: Banco de Sabadell, SA
Market Cap (USD): $20.16 B
Stock: SAB wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Banks—Diversified

18. Mapfre, SA

Company Profile: Mapfre, SA
Market Cap (USD): $15.31 B
Stock: MAP wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Insurance—Diversified

19. Bankinter, SA

Company Profile: Bankinter, SA
Market Cap (USD): $15.29 B
Stock: BKT wb_incandescent
Country: Spain
Sector: Spanish Financials
Industry: Spanish Banks—Regional

20. Siemens Gamesa Renewable Energy, SA

Company Profile: Siemens Gamesa Renewable Energy, SA
Market Cap (USD): $13.41 B (Feb. 1, 2023)
Stock: SGRE wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Specialty Industrial Machinery

21. Acciona, SA

Company Profile: Acciona, SA
Market Cap (USD): $12.21 B
Stock: ANA wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Engineering & Construction

22. Indra Sistemas, SA

Company Profile: Indra Sistemas, SA
Market Cap (USD): $10.21 B
Stock: IDR wb_incandescent
Country: Spain
Sector: Spanish Technology
Industry: Spanish Information Technology Services

23. Red Eléctrica Corporación, SA

Company Profile: Red Eléctrica Corporación, SA
Market Cap (USD): $9.70 B
Stock: REE wb_incandescent
Country: Spain
Sector: Spanish Utilities
Industry: Spanish Utilities—Regulated Electric

24. Grifols, SA

Company Profile: Grifols, SA
Market Cap (USD): $8.95 B
Stock: GRF wb_incandescent
Country: Spain
Sector: Spanish Healthcare
Industry: Spanish Drug Manufacturers—General

25. MERLIN Properties SOCIMI, SA

Company Profile: MERLIN Properties SOCIMI, SA
Market Cap (USD): $8.15 B
Stock: MRL wb_incandescent
Country: Spain
Sector: Spanish Real Estate
Industry: Spanish REIT—Diversified

26. Fluidra, SA

Company Profile: Fluidra, SA
Market Cap (USD): $5.24 B
Stock: FDR wb_incandescent
Country: Spain
Sector: Spanish Industrials
Industry: Spanish Specialty Industrial Machinery

27. CIE Automotive, SA

Company Profile: CIE Automotive, SA
Market Cap (USD): $4.27 B
Stock: CIE wb_incandescent
Country: Spain
Sector: Spanish Consumer Discretionary
Industry: Spanish Auto Parts

28. Inmobiliaria Colonial, SOCIMI, SA

Company Profile: Inmobiliaria Colonial, SOCIMI, SA
Market Cap (USD): $3.96 B
Stock: COL wb_incandescent
Country: Spain
Sector: Spanish Real Estate
Industry: Spanish REIT—Office

29. Enagás, SA

Company Profile: Enagás, SA
Market Cap (USD): $3.85 B
Stock: ENG wb_incandescent
Country: Spain
Sector: Spanish Utilities
Industry: Spanish Utilities—Regulated Gas

30. Acerinox, SA

Company Profile: Acerinox, SA
Market Cap (USD): $3.81 B
Stock: ACX wb_incandescent
Country: Spain
Sector: Spanish Basic Materials
Industry: Spanish Steel

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