I stumbled on a list of the largest 200 construction companies globally. It is published by KHL ICON magazine. It gives a list of top 200 construction contractors by business volume. There is also a country list.
You can access the article and the list at the following address (you need to register but it is free). Definitely worth it.
https://www.khl.com/members-area/icon-200-2019/140143.article
For the lazy folks, I can say that, top 4 are Chinese and the fifth one is a French company. 7th one is a Spanish company (it is not Acciona but maybe a related company).
I strongly recommend you register (takes 2 minutes) and look at the list.
Cheers
Turkey has 46 companies in top 250 but none of them are in the top ten.
I think it is another list or for another year.
https://www.enr.com/toplists/2019-Top-250-International-Contractors-1
Yes, this is from another source.
ENR.com is the bible of the construction industry, providing news and features about projects, products and people in construction, architecture and engineering.
ENR's list is different from ICON in its methodology.
ICON ranks the construction contractors according to their total revenues. On the other hand, ENR ranks international construction companies and in doing so, ENR ranks them according to construction revenue generated **outside** of each company’s home country.
I find ENR's list much more interesting.
Italy is in with 8 companies
Saipem 34
Salini Impregilo 58 (11 down from previous year)
Maire Tecnimont 87 (7 down from previous year)
Astaldi 102 (5 down from previous year)
Bonatti 130 (New in list)
Techint Engineering and Construction 172 (4 up from previous year)
Trevi SpA 191 (5 up from previous year)
CMC Ravenna 199 (8 down from previous year)
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Spain has a total of 10 companies in the top 200 list.
7 ACS
37 Acciona
47 FCC
51 Ferrovial
65 Tecnicas Reunidas
80 Sacyr vallehermeso
101 Obrascon Huarte Lain
137 Isolux Corsan
180 Albengoa
189 Comsa EMTE
Not bad!