What Okyanus Grup does

Okyanus Grup is a Turkish-headquartered international construction and engineering contractor operating under the legal entity LEEB İNŞAAT A.Ş., founded in 1993 and based in Beşiktaş, Istanbul. The company delivers complex large-scale construction projects across multiple asset classes, including shopping malls, airports and railway stations, sports halls and stadiums, industrial and manufacturing buildings, hotels, residential complexes, office buildings, logistics warehouses, hospitals, and specialized nuclear facilities. Its service offering spans the full construction value chain — engineering, project management, and on-site execution — with vertical integration supported by a production facility in the Gebze Organized Industrial Zone. Notable reference projects include the Chernobyl New Safe Confinement (constructed as part of a Vinci/Bouygues consortium), Metropol Istanbul (tallest residential building in Turkey), Baku International Airport, BNP Paribas Tower in Algeria, Astana Stadium in Kazakhstan, and Quatuor Brussels (winner of Best of Europe at the International Property Awards).

The company's go-to-market is direct project engagement with developers, governments, and general contractors, secured through relationship-based business development rather than branded marketing channels. It executes internationally through wholly-owned operating subsidiaries — Okyanus Leeb Ireland, Leeb Belgium SPRL, Okyanus Leeb Denmark ApS, and Okyanus Leeb Italy S.R.L. — enabling local market access, regulatory compliance, and prime/subcontractor positioning across EMEA. Pricing is not publicly disclosed; project costs are negotiated per contract and vary based on scope, complexity, and specifications, consistent with a B2B custom-construction commercial model. The firm claims 750+ completed projects across 24 countries and lists enterprise and government customers across at least 10 distinct industries.

Okyanus Grup is privately held, with no evidence of external investor ownership, public listing, or M&A activity in the available data. Registered paid-up capital is 40,000,000 TL under Mersis No: 0608056127500011, with the auditor listed as AS BAĞIMSIZ DENETİM VE YMM A.Ş. The management structure includes a Board of Directors chaired by Mustafa Mutlu. Headcount is in the 501-1,000 range, and the company operates active ongoing projects in Belgium, Ireland, Denmark, Italy, Turkey, Saudi Arabia, and elsewhere.

Name

Okyanus Grup

Legal name

LEEB İNŞAAT A.Ş.

Website

https://okyanusgrup.com

Company type

Private

Founded year

1993

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Okyanus Grup is a Turkish-headquartered international construction and engineering contractor that builds shopping malls, airports, stadiums, hospitals, industrial facilities, and specialized structures across 24 countries, executing complex projects through subsidiaries in Ireland, Belgium, Denmark, and Italy for enterprise and government clients.

Ownership category

akta.pro rank

Headquarters

HQ city

Besiktas

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Supply Chain, Operations, Infrastructure, Marketing or Sales, Others

Distribution channels1 record

Marketing channels1 record

Core offering

Okyanus Grup is a construction and engineering company that delivers large-scale commercial, industrial, infrastructure, and government building projects on a contract basis. Its portfolio spans shopping malls, airports and railway stations, sports halls and stadiums, industrial buildings, hospitals, logistics warehouses, residential and hotel buildings, office complexes, and specialized structures such as the Chernobyl New Safe Confinement. Projects are executed primarily in Turkey and internationally through wholly-owned subsidiaries in Ireland, Belgium, Denmark, and Italy, supported by a production facility in Gebze/Kocaeli.

Product overview

Okyanus Grup is a construction company that offers a comprehensive portfolio of construction services as a single unified offering. The company's services span multiple construction segments including malls, airports and stations, industrial buildings, hotels/residences/business centers, sports halls, hospitals, nuclear facilities, and logistics warehouses. The company operates internationally through subsidiaries in Belgium, Ireland, Denmark, Kazakhstan, and Italy, and has completed over 750 projects across 24 countries. Notable projects include the Chernobyl New Safe Confinement, Metropol Istanbul, and Baku International Airport.

Differentiator

Problem solved

Functional benefit

Products and services

• Malls Construction Construction of shopping mall complexes including retail space, entertainment facilities, and associated infrastructure for retail developers and large commercial operators.
• Airports & Stations Construction Construction of international airports, regional airports, and railway stations including terminal buildings and supporting infrastructure for aviation authorities, airport operators, and rail operators.
• Sports Halls & Stadiums Construction Construction of sports arenas, stadiums, and sports hall facilities for athletic events, serving sports federations, municipalities, and government clients.
• Industrial Buildings Construction Construction of manufacturing facilities, factories, warehouses, and industrial complexes for manufacturing and industrial sector clients.
• Hotels, Residences & Business Centers Construction Construction of residential buildings, hotel complexes, and commercial office buildings and business centers for hotel operators, real estate developers, and corporate tenants.
• Hospital Construction Construction of hospital and healthcare facilities including medical buildings and specialized healthcare infrastructure for public health authorities and healthcare operators.
• High-Rise Buildings Construction Construction of skyscraper and high-rise residential and commercial buildings including tower complexes for real estate developers and multinational occupiers.
• Logistics Warehouses Construction Construction of logistics and distribution warehouse facilities for logistics operators and supply chain companies.
• Nuclear & Specialized Facility Construction Construction of specialized nuclear and high-containment facilities including complex engineered structures for nuclear and government clients.
• Banking & Data Center Construction Construction of banking headquarters, training facilities, and data center buildings for financial institutions and IT operators.

Quantifiable outcome

• 750+ finished projects completed successfully
• +2 more outcomes

Named customers51 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• TAV Construction: Turkish contractor specializing in airport and terminal construction with an extensive international project portfolio. Highly comparable to Okyanus — both are Turkish-rooted contractors with strong airport construction credentials (Okyanus: Baku, Almaty, Riyadh, Tripoli, Batumi) and work as both prime and sub-contractor on global aviation projects.
• Renaissance Construction: Major Turkish-origin international contractor executing industrial, commercial, and infrastructure projects across CIS, MENA, and Africa. Comparable to Okyanus on Turkish roots, geographic footprint, and diversified multi-sector construction delivery.
• BESIX: Belgian construction group and a named collaborator/client of Okyanus on Quatuor Brussels, Manhattan Brussels, and other projects. Directly comparable as a European-headquartered general contractor executing complex high-rise, commercial, and infrastructure projects internationally.
• Yapı Merkezi: Turkish contractor with strong international presence in rail, metro, and bridge infrastructure along with buildings. Comparable to Okyanus on Turkish origin, international project delivery, and multi-sector civil/building construction portfolio.
• Kolin İnşaat: Major Turkish general contractor executing highways, hospitals, energy, and commercial construction domestically and internationally. Comparable to Okyanus in cross-sector construction capabilities, Turkish origin, and participation in large public infrastructure projects.
• Limak İnşaat: Turkish construction and infrastructure group active in airports, ports, highways, and energy projects across the MENA, CIS, and Africa. Closely comparable to Okyanus on international footprint, airport construction, and project typology diversification.
• Royal BAM Group: Dutch construction company and a named client of Okyanus on the New Childrens Hospital in Dublin. Comparable on European building and infrastructure construction, with similar geographic footprint across the UK, Ireland, and continental Europe.
• ENKA İnşaat: Turkey's largest international engineering and construction company, executing power plants, airports, commercial buildings, and infrastructure globally. Comparable to Okyanus across project typology, Turkish origin, international delivery model, and EPCM/contracting role on large complex projects.
• Ant Yapı: Turkish construction firm with a strong international portfolio of residential, commercial, and mixed-use developments in the CIS, MENA, and Europe. Closely comparable to Okyanus on Turkish origin, international project mix, and high-rise/residential building specialization.
• Nurol İnşaat: Turkish construction group with significant international operations in infrastructure, buildings, and defense construction. Comparable to Okyanus on Turkish origin, international project portfolio, and execution of complex multi-sector construction work.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks7 records

Key highlights7 records

Customer concentration

• Xx.com/okyanusgrup
• Facebookfacebook.com/okyanusgrupsosyal
• LinkedInlinkedin.com/company/nasakoma

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Okyanus Grup