Company lists · Data refreshed September 2026

Top 25 Infrastructure conglomerates based in Romania

Name: Infrastructure conglomerates based in Romania
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 100 companies tracked

RevenueBase identified 100 infrastructure conglomerates headquartered in Romania as of September 2026 and tracks 1,951 professional contacts across them, including 510 with verified work emails. Bucharest is the largest hub.

This list covers infrastructure conglomerates headquartered in Romania, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

100Companies

1,951Contacts tracked

510Verified emails

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The 25 largest infrastructure conglomerates based in Romania

Ranked by team size

Top 25 of 100 infrastructure conglomerates based in Romania, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to infrastructure conglomerates: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Concelex	Partial evidence	Sectorul 1, RomaniaHQ checked Sep 20, 2026	1,001-5,000	242 contacts →
	Partial evidence “Concelex is THE integrated infrastructure company.” Source: RevenueBase Database · checked Sep 20, 2026
2	Electrogrup	Partial evidence	Cluj-napoca, RomaniaHQ checked Sep 20, 2026	501-1,000	223 contacts →
	Partial evidence “An entrepreneurial success story started in 1997, and today Electrogrup is one of the main players in the infrastructure construction field in Romania.” Source: RevenueBase Database · checked Sep 20, 2026
3	TIAB	Indirect evidence	Bucuresti, RomaniaHQ checked Sep 20, 2026	501-1,000	151 contacts →
	Indirect evidence “TIAB, the solution in installations of VINCI Energies, is a system integrator for electrical and mechanical solutions and services.” Source: RevenueBase Database · checked Sep 20, 2026
4	E-Infra	Partial evidence	Sector 1, RomaniaHQ checked Sep 20, 2026	1,001-5,000	84 contacts →
	Partial evidence “In today's world, technology is king, yet it runs on infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
5	Tiriac Group	Indirect evidence	Bucharest, RomaniaHQ checked Sep 20, 2026	1,001-5,000	84 contacts →
	Indirect evidence “Created at the initiative of Mr.” Source: RevenueBase Database · checked Sep 20, 2026
6	Tecnic Consulting Engineering Romania SRL	Indirect evidence	Bucharest, RomaniaHQ checked Sep 20, 2026	51-200	67 contacts →
	Indirect evidence “Tecnic Consulting Engineering, a proud member of RCI Holding, has been delivering engineering excellence across Eastern Europe since 2007.” Source: RevenueBase Database · checked Sep 20, 2026
7	Btdconstruct & Ambient SRL	Indirect evidence	Bucuresti, RomaniaHQ checked Sep 20, 2026	51-200	65 contacts →
	Indirect evidence “BEYOND THE DETAILS BTDConstruct & Ambient is a 100% Romanian company, established in 2013, which operates in the field of general constructions and public works.” Source: RevenueBase Database · checked Sep 20, 2026
8	Gülermak Romania	Indirect evidence	Bucureşti, RomaniaHQ checked Sep 20, 2026	5,001-10,000	64 contacts →
	Indirect evidence “GÜLERMAK este un antreprenor internațional de top in domeniul EPC, cunoscut pentru reputația și profesionalismul său.” Source: RevenueBase Database · checked Sep 20, 2026
9	Search Corporation	Indirect evidence	Bucharest, RomaniaHQ checked Sep 20, 2026	51-200	63 contacts →
	Indirect evidence “SEARCH CORPORATION is one of the leading Romanian engineering companies, providing services of planning, design and consultancy for public administration authorities and private…” Source: RevenueBase Database · checked Sep 20, 2026
10	Habau Romania	Indirect evidence	Ploiesti, RomaniaHQ checked Sep 20, 2026	201-500	58 contacts →
	Indirect evidence “HABAU Romania is part of the family HABAU GROUP, an international full-service provider in the areas of building construction, civil engineering, precast construction, underground…” Source: RevenueBase Database · checked Sep 20, 2026
11	Hidro Salt	Indirect evidence	Sector 2, RomaniaHQ checked Sep 20, 2026	201-500	29 contacts →
	Indirect evidence “Firma de constructii civile, de drumuri si edilitare” Source: RevenueBase Database · checked Sep 20, 2026
12	Acvatot SRL	Indirect evidence	Bucharest, RomaniaHQ checked Sep 20, 2026	51-200	27 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
13	Globexterra	Indirect evidence	Sector 1, RomaniaHQ checked Sep 20, 2026	11-50	26 contacts →
	Indirect evidence “Globexterra: Soluții Complete de Arhitectură și Management de Proiect Înființată în 2011, Globexterra reprezintă excelența românească în domeniul proiectării, de arhitectură…” Source: RevenueBase Database · checked Sep 20, 2026
14	Cominco Oltenia SA	Indirect evidence	Rm. Valcea, RomaniaHQ checked Sep 20, 2026	201-500	22 contacts →
	Indirect evidence “Cominco Oltenia SA perform the next range of works: Civil engineering Manufacture of structural metal products Industrial building Construction of residential and non-residential…” Source: RevenueBase Database · checked Sep 20, 2026
15	Allplan Proiect	Indirect evidence	Constanţa, RomaniaHQ checked Sep 20, 2026	11-50	21 contacts →
	Indirect evidence “ALLPLAN PROIECT starts its activity in 2001, having a basis one simple idea: high quality engineering services.” Source: RevenueBase Database · checked Sep 20, 2026
16	RCI Holding	Partial evidence	Bucharest, RomaniaHQ checked Sep 20, 2026	201-500	19 contacts →
	Partial evidence “RCI Holding, a conglomerate of 21 companies founded in and based in Bucharest, Romania, is a major player in the Engineering, Digital Innovation and Technology, Financial…” Source: RevenueBase Database · checked Sep 20, 2026
17	Metrans Engineering	Indirect evidence	Sectorul 5, RomaniaHQ checked Sep 20, 2026	11-50	18 contacts →
	Indirect evidence “METRANS ENGINEERING is a company founded in 2018, with an integral Romanian capital that aims to respond effectively to any type of Client.” Source: RevenueBase Database · checked Sep 20, 2026
18	Sorocam SRL	Partial evidence	Popesti Leordeni, RomaniaHQ checked Sep 20, 2026	51-200	18 contacts →
	Partial evidence “Sorocam, membră a Grupului Colas, este motorul calității în producția de materiale pentru infrastructura de transport din România.” Source: RevenueBase Database · checked Sep 20, 2026
19	Isaf SA	Indirect evidence	Sectorul 1, RomaniaHQ checked Sep 20, 2026	51-200	17 contacts →
	Indirect evidence “ISAF SA - established in 1951 - In the past, member of the COLAS Rail Group (2008-2024)- Starting with 2025, the new shareholder of ISAF is San Electroterm Grup ISAF has gathered…” Source: RevenueBase Database · checked Sep 20, 2026
20	SW Umwelttechnik România S.R.L	Partial evidence	Izvoru, RomaniaHQ checked Sep 20, 2026	501-1,000	12 contacts →
	Partial evidence “Dezvoltăm și producem piese prefabricate din beton pentru construcția și extinderea infrastructurii terestră și subterană.” Source: RevenueBase Database · checked Sep 20, 2026
21	Ecciro	Partial evidence	Sector 3, RomaniaHQ checked Sep 20, 2026	51-200	12 contacts →
	Partial evidence “ECCI (ENGINEERING CIVIL CONSTRUCTION AND INFRASTRUCTURE) is a civil, industrial and infrastructure construction company with extensive experience in large-scale projects, executed…” Source: RevenueBase Database · checked Sep 20, 2026
22	Masterbuild	Indirect evidence	Bucuresti, RomaniaHQ checked Sep 20, 2026	51-200	10 contacts →
	Indirect evidence “BUILDING LANDMARKS SINCE 2005.” Source: RevenueBase Database · checked Sep 20, 2026
23	Autoprima Serv	Indirect evidence	Constanţa, RomaniaHQ checked Sep 20, 2026	11-50	10 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
24	Explan SRL	Partial evidence	Cluj-napoca, RomaniaHQ checked Sep 20, 2026	11-50	9 contacts →
	Partial evidence “EXPLAN SRL is a company focused on the delivery of full solutions, design, consultancy and management in civil engineering, mainly road infrastructure.” Source: RevenueBase Database · checked Sep 20, 2026
25	Deltanet S.R.L	Indirect evidence	Timisoara, RomaniaHQ checked Sep 20, 2026	51-200	8 contacts →
	Indirect evidence “Infiintata in 2004, Deltanet s-a dezvoltat ca si constructor de retele de telecomunicatii in special proiectarea, constructia si mentenanta retelelor de fibra optica pentru marii…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: infrastructure conglomerates. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names infrastructure conglomerates.
Partial evidence: Its own public description names part of infrastructure conglomerates, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name infrastructure conglomerates. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 100 infrastructure conglomerates based in Romania

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Infrastructure conglomerates based in Romania at a glance

As of Sep 20, 2026

26.1%Verified-email coverage

19.5Average contacts per company

51-200Median size (employees)

28.0%Largest-city concentration · Bucharest

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for Romania, so it is reported there. Company counts and contact totals on this page are exact for Romania, over 100 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among infrastructure conglomerates, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Romania whose own description of what they do matches “infrastructure conglomerates”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names infrastructure conglomerates), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among infrastructure conglomerates, and records with no verified work email. Companies headquartered outside Romania are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 510 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Infrastructure conglomerates by metro

Infrastructure conglomerates in Bucharest28

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names infrastructure conglomerates, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many infrastructure conglomerates are there based in Romania?

RevenueBase identified 100 infrastructure conglomerates headquartered in Romania as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Concelex, headquartered in Romania, tops this list with the largest team on record.

Which city has the most infrastructure conglomerates?

Bucharest leads with 28 headquartered companies, followed by Bucuresti (9) and Constanta (6).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 510 verified decision-maker contacts tracked across these 100 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.