Gemak Group

What Gemak Group does

Gemak Group is a privately-held Turkish shipbuilding and maritime services group founded in 1969 by Naval Architect İsmet Üner in Istanbul and operated today under the continued leadership of the Üner family (Chairman İsmet Üner, Deputy Chairman and CEO Mehmet Birol Üner). The group operates across four primary shipyard facilities — Gemak Tuzla, Gemak TGE, Neta Factory, and Gemak Altınova — totaling approximately 336,000 m², plus the newly commissioned Avanos Solar Power Plant, and employs approximately 2,500 staff including 900 engineers. Its service portfolio spans ship repair and conversion (5.5 million DWT annual capacity, 2,800+ vessels serviced since 1969), new shipbuilding (23 vessels built since 1985 per company statement, with 58 referenced elsewhere), offshore and oil-and-gas fabrication (260+ projects since 1999), and large-scale industrial steel construction including bridge decks for the 3rd Bosphorus Bridge and shafts for the İzmit Bay Bridge. The company maintains its position among Turkey's top 500 industrial organizations.

Gemak's technology stack centers on heavy steel fabrication, custom-engineered marine equipment, and an in-house R&D Center established in 2016 — Turkey's first in the shipyard sector — with 66 completed R&D projects, 6 registered patents and utility models, and proprietary equipment including a 10,800-ton hydraulic transfer system, a 7,200-ton mega block hydraulic transfer system, an automatic 3D spool fit-up station, a U-Rib Assembly Machine, a Panel Forming Line, and a self-developed ERP system. Recent equipment additions include a 2,500-ton bending roller press installed in January 2026. The group holds certifications including EN 1090-2 Execution Class 4 for complex steel structures, ISO 9001, ISO 14064-1 carbon footprint verification, GTT approval for LNG membrane containment systems, ABS-class approval for the NB045 floating dock, and an R&D Center designation from Turkey's Ministry of Science, Industry and Technology.

Revenue is generated through project-based contracts across four primary streams: ship repair and maintenance (per-vessel or per-service pricing), ship conversion and modernization (lump-sum or cost-plus), new shipbuilding (milestone-based payments), and offshore and industrial fabrication (project-based industrial contracts). Specialized service lines include BWTS retrofits (100+ completed), scrubber installations (25+ completed), and LNG carrier maintenance and repair. The customer base spans 3,000+ ship owners and operators globally, with named enterprise clients including DEME Group, Jan De Nul, DFDS, Grimaldi, Stolt-Nielsen, Eastern Pacific Shipping, Hafnia Tankers, Navios Maritime, Great Eastern Shipping, Stena Line, Karadeniz Holding, NASSCO, Nordlaks, Dragados Offshore, and EFGL. Go-to-market relies on direct enterprise field sales and consistent participation in major maritime exhibitions (Nor-Shipping, SMM Hamburg, Posidonia, Sea Asia, Sea Japan, MARENTECH EXPO), with quote-based pricing following technical assessment and no publicly disclosed pricing structures.

Name

Gemak Group

Legal name

Gemak Group

Website

https://gemak.com

Company type

Private

Founded year

1969

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Gemak Group is a privately-held Turkish shipbuilding and maritime services group founded in 1969, operating four shipyards totaling 336,000 m² with 2,500 employees. It provides integrated ship repair, conversion, newbuilding, and offshore fabrication services to global ship owners and industrial clients.

Ownership category

akta.pro rank

Product category

Shipbuilding & Maritime Services

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (33661), Overhead Traveling Crane, Hoist, and Monorail System Manufacturing (333923)

SIC

Ship & Boat Building & Repairing (3730), Construction, Mining & Materials Handling Machinery & Equip (3530)

akta.pro primary industry

Commercial Ship Repair & Drydocking (TLAKAKAA)

akta.pro secondary industries

Launch & Retrieval Infrastructure (Slipways, Cradles, Travel Lifts, Launching Systems) (IMAJALAE), Pipe-lay & Heavy-lift Offshore Vessel Construction (IMAJACAE), Heavy Lifting & Material Handling Infrastructure (Goliath Cranes, Jib Cranes, Hoists) (IMAJALAD), Hull, Structure & Steelwork Repair (TLAKAKAE)

Keywords

• Ship repair services
• Vessel conversion
• Shipbuilding construction
• Offshore fabrication
• Industrial steel structures

Headquarters

HQ city

Istanbul

Offices6 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Infrastructure, Supply Chain, Technology or R&D, Operations, Marketing or Sales

Revenue model

1. Ship Repair and Maintenance: Provides dry docking, repair, and maintenance services for various vessel types including bulk carriers, LPGs/LNGs, dredgers, offshore platforms, semi-subs, and drillships. Revenue generated through project-based contracts with per-vessel or per-service pricing.
2. Ship Conversion and Modernization: Engineering-intensive conversion projects including vessel lengthening, powership conversions, scrubber/BWTS retrofits, and life extension projects. Revenue generated through lump-sum or cost-plus contracts.
3. New Ship Building: Construction of customized and sophisticated ships for domestic and international clients. Revenue generated through shipbuilding contracts with milestone-based payments.
4. Offshore and Industrial Projects: Fabrication of offshore platforms, FPSO/FSO vessels, topside modules, and large-scale steel structures such as bridges. Revenue through project-based industrial fabrication contracts.

Go-to-market motion2 records

Distribution channels1 record

Marketing channels5 records

Core offering

Gemak Group is a Turkish shipbuilding and maritime services company that provides ship repair and conversion, new shipbuilding, offshore and oil & gas construction, and large-scale industrial steel fabrication services. Operating four shipyards totaling 336,000 m² with 5.5 million DWT annual repair capacity, the group serves global commercial ship owners, offshore operators, and industrial clients through its approximately 2,500-strong workforce, including 900 engineers. Its offerings span vessel maintenance, retrofitting (scrubber/BWTS), LNG carrier repair, powership conversions, offshore platform fabrication, and major infrastructure projects such as bridge steel decks.

Product overview

Gemak Group is a Turkish shipbuilding and maritime services company offering an integrated portfolio of ship repair & conversion, new shipbuilding, offshore & oil gas projects, and industrial steel fabrication services. The group operates through four main facilities: Gemak Tuzla Shipyard, Gemak TGE Shipyard (housing the group's R&D Center), Neta Factory (steel & pipe fabrication), and Gemak Altınova Shipyard. Specialized services include BWTS and scrubber retrofits, LNG carrier maintenance with GTT certification, and large-scale industrial projects such as bridge construction. With over 55 years of experience and approximately 3,000 employees, the group serves as a comprehensive maritime partner offering engineering solutions from initial design through construction to maintenance and conversion.

Differentiator

Problem solved

Functional benefit

Products and services

• Ship Repair & Conversion Comprehensive ship repair and conversion services including dry docking, damage repairs, refits, and retrofits for commercial vessels. Serves bulk carriers, LPGs/LNGs, dredgers, offshore platforms, semi-subs, drillships, and other vessel types with 5.5 million DWT annual capacity.
• Ship Newbuilding Customized and sophisticated ship construction for domestic and international clients with multidisciplinary engineering capacity and large-scale fabrication facilities including 3,500 tons steel fabrication capacity per month.
• Offshore & Oil Gas Projects Design, engineering, and construction of offshore structures including topside modules, living quarters, accommodation/power/utility modules, PSV and AHTS vessels, semi-submersible and jack-up rigs, FPSO and FSO vessels, and offshore wind structures.
• Industrial Projects Large-scale steel construction projects including bridge steel decks, pressure vessels, and tubular fabrication. Notable projects include steel deck fabrication for Yavuz Sultan Selim (3rd Bosphorus Bridge) and steel shafts for Izmit Bay Bridge.
• Ballast Water Treatment System (BWTS) Retrofitting Installation and retrofitting of ballast water treatment systems including SUNRUI BalClor systems for various vessel types to meet IMO BWM Convention requirements.
• Scrubber System Retrofitting Installation of exhaust gas cleaning systems (scrubbers) including open loop, closed loop, and hybrid scrubber systems to comply with MARPOL Annex VI sulphur emissions limits.
• LNG Carrier Maintenance & Repair LNG carrier maintenance and repair services including GTT-certified inspection, maintenance, and repairs on membrane containment systems, supported by dedicated cryogenic, mechanical, and stainless steel piping workshops.
• Gemak Tuzla Shipyard One of Turkey's first and leading ship repair and conversion yards located in Tuzla, Istanbul. Total area 45,000 m² with 16,000 m² closed and 29,000 m² open facilities, employing approximately 1,000 workers.
• Gemak Altınova Shipyard Shipyard in Altınova, Yalova currently spanning 120,000 m² with planned expansion to 140,000 m² total land area and 1,290 m of piers and jetties. Dedicated to large-scale steel fabrication and ship repair/conversion projects.
• Gemak TGE Shipyard Shipyard in Tuzla, Istanbul with total area 87,000 m² including 11,000 m² closed and 76,000 m² open areas. Houses the biggest graving dock in the region and the group's R&D Center; employs approximately 800 workers.
• Neta Factory (Neta Boru - Çelik) Steel and pipe fabrication facility in Tuzla, Istanbul. Originally supporting Gemak TGE Shipyard capacity, now offers services on the open market for high-quality, low-tolerance steel structures of various types.

Quantifiable outcome

• 3,000+ ships serviced since 1969
• +5 more outcomes

Named customers19 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature9 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• Rönesans Industrial FacilitiescoreStrategic or Co-development Partner · 15 December 2025Collaboration on LNG process modules for FPU (Floating Production Unit) Osman Gazi project. Using latest technologies to meet offshore standards for TP-OTC end customers and primary clients.
• GTT (Gaztransport & Technigaz, France)coreTechnology or Integration · 20 September 2024Gemak Shipyard has been nominated as an approved partner by GTT for maintenance and repair of membrane containment systems on LNG carriers. This partnership enables specialized teams to perform inspection, maintenance, and repairs on state-of-the-art LNG tank designs. Additionally established cryogenic workshop, mechanical workshop, and stainless steel piping workshop for comprehensive LNG services.
• Reederei NORD GroupminorStrategic or Co-development Partner · 18 May 2023Multiple dry dock repairs and major modifications on BWTS systems for vessels operated by Reederei NORD Group.
• NordlakscoreStrategic or Co-development Partner · 21 September 2022Hydra Fish Farm project - approximately 6,500 ton offshore fish farming structure for Norwegian salmon production. Features production volume of 86,700 m³ and maximum biomass capacity of 3,120 tons. Designed and engineered entirely with in-house capabilities.
• Dragados OffshorecoreStrategic or Co-development Partner · 6 August 2019Gemak Group contributed by fabricating steel structure blocks of topside module for DolWin6 Offshore Platform. The platform was successfully installed in German North Sea and will provide green wind power to over 1 million households in EU.
• TURMEPA (Marine Environment Protection Association)minorOthersEnvironmental partnership for coastal cleanup initiatives and marine ecosystem protection.
• Istanbul Technical UniversityminorStrategic or Co-development PartnerUniversity-industry cooperation including student visits, internship programs, and R&D collaboration. Naval Engineering Club visits to Gemak TGE Shipyard.
• Piri Reis UniversityminorStrategic or Co-development PartnerEducation and cooperation framework protocol signed for R&D and innovation-oriented studies, knowledge sharing, and internship opportunities.
• Bursa Technical UniversityminorStrategic or Co-development PartnerEducation cooperation framework protocol for student internships at Gemak shipyards, enhancing professional experience for students.
• Norwegian University of Science and Technology (NTNU)minorStrategic or Co-development PartnerHosting maritime technology students from NTNU for industry visits and knowledge exchange.
• General Dynamics NASSCOcoreStrategic or Co-development PartnerBuilding and delivering 35,000 TLC floating drydock (253m length, 54m beam) for NASSCO shipyard in San Diego, USA. Delivered in early 2026 following 13,500 nautical mile journey.

Scale indicators16 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Sedef Shipyard: Turkish shipyard also based in Tuzla/Istanbul, active in shipbuilding, ship repair, and offshore fabrication. Closest geographic and segment peer to Gemak, competing directly for the same Mediterranean tanker and bulker repair contracts.
• Besiktas Shipyard: Istanbul-based shipyard providing ship repair, conversion, and newbuilding for commercial and naval clients. Direct competitor to Gemak in Tuzla's repair cluster and in BWTS/scrubber retrofit projects.
• DESAN Shipyard: Turkish ship repair and newbuilding yard with multiple dry docks in Tuzla. Competes head-to-head with Gemak for vessel repair, conversion, and industrial steel fabrication projects across the Mediterranean.

Broad incumbents

• Damen Shipyards Group: Netherlands-based global shipbuilder with a broad portfolio of newbuild, repair, and conversion services across naval, offshore, and commercial segments. A broad incumbent whose repair yards compete for the same European offshore and dredging work as Gemak.
• Sembcorp Marine: Singapore-based shipbuilder and offshore rig converter with large graving docks and offshore engineering capabilities. Competes for FPSO, FSO, and offshore wind fabrication projects where Gemak is positioning.
• Fincantieri: Italy-headquartered global shipbuilding group operating cruise, naval, offshore, and ship repair divisions. Comparable in ship repair and offshore vessel construction, though significantly larger and more diversified.

Regional players

• Remontowa Shipbuilding: Poland-based ship repair, conversion, and newbuilder serving Baltic and North Sea markets. Comparable in engineering-driven ship repair and offshore vessel fabrication, particularly for European offshore wind projects.
• Drydocks World: Dubai-based ship repair, conversion, and offshore fabrication yard with mega graving docks. Comparable in offshore rig and FPSO conversion capability, competing for Middle East and Indian Ocean repair work.
• ASRY (Arab Shipbuilding & Repair Yard): Bahrain-based commercial ship repair and conversion yard serving Middle East, Asian, and European-flagged vessels. Direct regional competitor for tanker, bulker, and offshore repair contracts transiting the Suez route.
• Lisnave: Portugal-based ship repair and conversion yard serving Atlantic and Mediterranean routes. Comparable in commercial ship repair scope and serves similar European tanker/RoRo customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedIntr.linkedin.com/company/gemakgroup

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles14 records

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 Gemak Group