What Gaztransport & Technigaz does

Gaztransport & Technigaz (GTT) is a French engineering company founded in 1994 and listed on Euronext Paris, specializing in cryogenic membrane containment systems for the maritime transport and storage of liquefied gases, principally LNG at -163°C. Its core products are proprietary membrane technologies — Mark III (corrugated stainless steel + composite), NO96 (dual Invar metallic membranes), the next-generation GTT NEXT1 and NO96 Super+ polyurethane-foam variants, and the GST® system for onshore storage — each progressively reducing boil-off rates to as low as 0.07% V/day. GTT licenses these non-exclusively to a global network of approximately 30 shipyards (Korean, Chinese, Japanese, and European majors), and sells ancillary engineering services, training (GTT Training), membrane integrity testing (Cryovision), and 24/7 emergency response (HEARS®).

GTT earns the bulk of revenue through licensing royalties and fees tied to each vessel constructed using its technology, supplemented by technical services. The second pillar — GTT Marine, built via the acquisitions of Ascenz Marorka (2017) and Danelec (2025) plus Vessel Performance Solutions — delivers a digital platform for voyage optimization, fuel monitoring, VDR/safety analytics, and fleet performance, with over 17,000 solutions deployed and a recurring subscription/managed-services revenue stream. The customer base spans LNG carrier owners (BW LNG, Celsius, Maran Gas, Capital Clean Energy, Nakilat, MISC), LNG-fueled container/cruise/bunker operators (CMA CGM, MSC, Hapag-Lloyd, PONANT, Mitsui OSK), and onshore LNG terminal operators (Beijing Gas, Tokyo Gas, Kogas, CERN).

As of end-2025 the order backlog stood at 288 units (261 LNG carriers, 21 VLEC, 3 FSRU, 3 FLNG) plus 48 LNG-fuel units, Q1-Q3 2025 revenue reached €599.6M (+29% YoY), and FY2025 guidance was raised to €790-820M revenue and €530-550M EBITDA. GTT holds approximately 90% of new LNG vessel orders and its technology equips over 80% of operating LNG carriers, making it a quasi-monopoly supplier of membrane containment to the global LNG shipping industry.

Name

Gaztransport & Technigaz

Legal name

Gaztransport & Technigaz S.A.

Website

https://gtt.fr

Company type

Public

Founded year

1994

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Gaztransport & Technigaz (GTT) is a French engineering firm that designs and licenses cryogenic membrane containment systems (Mark III, NO96, GST) to shipyards and EPC contractors for LNG carriers, FSRU/FLNG, LNG-fueled vessels, and onshore storage, supplemented by a maritime digital solutions platform via its GTT Marine division.

Ownership category

akta.pro rank

Product category

Cryogenic Membrane Containment Technology

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (33661), Industrial Valve Manufacturing (332911)

SIC

Oil & Gas Field Machinery & Equipment (3533)

akta.pro primary industry

LNG Carrier Shipbuilding (IMAJAAAD)

akta.pro secondary industries

Production Design & Detailed Engineering (3D CAD, Drawings, BOM, Nesting) (IMAJAGAK), Pressure Vessels, Columns & Storage Tanks (ASME/Process Vessels) (IMAHAEAF), Bunkering Equipment, Systems & Maintenance (Hoses, Couplings, Metering, Vapour Return) (TLAHAKAK)

Keywords

• Cryogenic membrane containment
• LNG carrier technology
• Maritime engineering services
• LNG storage systems
• LNG fuel solutions

Headquarters

HQ city

Saint-rémy-lès-chevreuse

HQ country

France

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Technology Licensing: GTT licenses its membrane containment technologies (Mark III, NO96, GST) to shipyards and EPC contractors through non-exclusive licensing agreements. Royalties are earned for each vessel constructed using GTT technology. Generated approximately €350 million in royalty income in 2025 from over 1,000 licensed vessels in operation.
2. Technical Services: Engineering consultancy, construction assistance, emergency response services (HEARS), operational support, and maintenance services throughout vessel lifecycle (approximately 40 years). Provided by GTT and subsidiaries including GTT Training and Cryovision.
3. Digital Solutions: GTT Marine division provides maritime digital solutions including data acquisition systems, voyage optimization, fleet management, safety monitoring, and performance analytics. Revenue from software, hardware sales, and managed services through subsidiaries Danelec, Ascenz Marorka, and Vessel Performance Solutions.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

GTT designs, develops and licenses proprietary cryogenic membrane containment systems (Mark III, NO96, GTT NEXT1, GST®) used by shipyards to build LNG carriers, ethane carriers, FSRUs, FLNGs, onshore storage tanks, and LNG-fueled vessels, earning per-vessel royalties. The company complements this licensing business with engineering consultancy, on-site construction assistance, training (GTT Training), maintenance and integrity testing (Cryovision), and a GTT Marine digital division offering fleet performance, voyage optimization, and safety monitoring solutions through its Danelec, Ascenz Marorka, and Vessel Performance Solutions subsidiaries.

Product overview

GTT operates as a technology licensing and engineering services company with two main divisions: GTT Energy and GTT Marine. GTT Energy provides cryogenic membrane containment technologies (Mark III, NO96, GTT NEXT1, NO96 Super+, GST®) for LNG transport and storage applications including LNG carriers (261 on order), ethane carriers (21 VLEC on order), FSRU (3 on order), FLNG (3 on order), onshore storage, and LNG as fuel solutions. GTT Marine, combining subsidiaries Danelec, Ascenz Marorka, and Vessel Performance Solutions, offers the GTT Marine Insights digital platform for fleet performance, safety monitoring, voyage optimization, and data acquisition with over 17,000 maritime digital solutions deployed. Services include consultancy, engineering studies, training (GTT Training), and maintenance (Cryovision). Revenue model is based on technology licensing to shipyards, royalties, and digital services.

Differentiator

Problem solved

Functional benefit

Brands

• GTT Marine: Digital maritime solutions division providing onboard data acquisition, voyage optimization, fleet management, and performance monitoring for vessels
• GTT Marine Insights
• GST®
• HEARS®
• GTT CUBIQ™
• Recycool™

Products and services

• Mark III Membrane Technology Cryogenic membrane containment system for transporting and storing LNG at -163°C. Features a primary corrugated stainless steel membrane and secondary composite membrane on prefabricated insulation panels. Includes Mark III, Mark III Flex, and Mark III Flex+ variants with guaranteed boil-off rates from 0.15% to 0.07% per day; over 200 vessels equipped.
• NO96 Membrane Technology Cryogenic membrane containment system using double Invar (Fe-36%Ni) metal membranes with modular insulation boxes. Includes NO96 Perlite, NO96 GW, NO96 L03, NO96 L03+, and NO96 Super+ variants with boil-off rates from 0.15% to 0.085% per day; over 200 vessels equipped.
• GTT NEXT1 Membrane Technology Latest evolution cryogenic coating containing liquefied gases at low temperatures at atmospheric pressure, using polyurethane foam in primary and secondary layers to achieve a 0.07% daily boil-off rate.
• NO96 Super+ Membrane Technology Latest NO96 evolution with reinforced polyurethane foam (R-PUF) insulation panels replacing plywood boxes, achieving a 0.085% guaranteed boil-off rate for 174,000 m³ LNG carriers.
• GST® Membrane System Full Integrity Membrane system for onshore LNG storage tanks based on Mark III technology. Features separated primary corrugated stainless steel membrane, insulation panels, and concrete/steel structural resistance. Reduces carbon footprint up to 16%; 40+ tanks in operation; boil-off rate of 0.05% per day typical.
• LNG as Fuel (GNL Carburant) Membrane Solutions Membrane containment technologies for using LNG as maritime fuel, applicable to container vessels, cruise vessels, bunker vessels, and tankers. Mark III technology provides 30-100% higher fuel tank capacity compared to Type C tanks.
• GTT CUBIQ™ Cubic-shaped LNG fuel tank design for LNG-powered vessels, particularly container ships. Simplifies tank integration and installation while optimizing available volume onboard.
• Recycool™ BOG reliquifaction solution for LNG-fueled container ships that recovers cold energy from LNG vaporization to reliquify excess boil-off gas, improving energy efficiency and reducing emissions without moving parts.
• GTT Marine Insights Platform Integrated digital platform combining onboard systems, shore-side applications, and managed services for maritime fleet performance, safety, and energy efficiency optimization. Over 17,000 maritime digital solutions deployed worldwide.
• Onboard Edge by Danelec Edge computing platform for vessels ensuring continuous availability of critical maritime applications through secure, redundant infrastructure including during network or power outages.
• Vesper Insights by VPS Transforms noon reports and sensor data into structured performance analytics, benchmarking tools, and trend tracking for fleet technical and management teams.
• Voyage Insights by Ascenz Marorka Voyage optimization solution for pre-departure planning and in-voyage re-optimization using real-time weather routing, vessel-specific performance models, and operational constraints.
• Safety Insights by Danelec Fleet safety analysis and analytics solution for operational supervision and compliance through ship data analysis and visualization, risk management, and safety improvement.
• Voyage Data Recorder (VDR) by Danelec Next-generation voyage data recorder supporting regulatory compliance and operational reliability through collection, recording, and secure access to critical ship data and bridge communications.
• EFMS by Ascenz Electronic fuel monitoring system combining certified sensors and automated data acquisition for reliable fuel consumption information, emissions tracking, and commercial performance management.
• POWER Solution Automated risk analysis digital tool for optimizing regasification operations of offshore LNG units (FLNG or FSRU) and ship-to-ship LNG transfer in rough sea conditions. Extends operational windows up to 98% of time on site.
• LNG Solutions Digital Suite Digital solutions for cargo operations optimization across LNG carriers, FLNG, and FSRU including tank maintenance optimization, offshore window prediction, emergency departure assistance, rollover prevention, and cargo conditioning.
• HEARS® Emergency Response Service 24/7 emergency assistance hotline for shipowners and crews to report incidents and receive expert support. Covers gas leaks, water infiltration, LNG spillage, emergency departures, and nitrogen production loss.
• Consultancy & Engineering Services Technical consulting and engineering studies for shipowners including pre-project specifications, FEED studies for LNG as fuel and transport applications, sloshing studies, ship-to-ship transfer, and cargo mixing rollover prevention.
• GTT Training Training services including a catalog of LNG training courses and LNG and liquefied gas operations simulator, provided through the GTT Training subsidiary.
• Cryovision Membrane Testing & Maintenance Membrane testing and thermal integrity assessment services for LNG vessels including SBTT (Secondary Barrier Thermal Test), Global Test, and TAMI (Thermal Accuracy Membrane Integrity) evaluation, provided by Cryovision subsidiary.

Quantifiable outcome

• Boil-off rate reduction to 0.07% V/day with Mark III Flex+ technology
• +4 more outcomes

Named customers18 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

16 partnerships are on record, tiered core, major and minor.

• HD Korea Shipbuilding & Offshore Engineering (HD KSOE)coreChannel Partner/ Reseller/ Distributor · 28 May 2026HD KSOE orders tank designs from GTT for LNG carriers, including the world's first large-scale 177,000 cubic meter LNG carriers with three-cargo-tank configuration for shipowner BW LNG.
• Hanwha OceancoreChannel Partner/ Reseller/ Distributor · 28 May 2026Hanwha Ocean orders GTT tank designs for LNG carriers including 174,000 cbm vessels for European shipowners.
• Samsung Heavy Industries (FSRU)coreChannel Partner/ Reseller/ Distributor · 13 May 2026Samsung Heavy Industries orders GTT cryogenic tank design for 170,000 m³ FSRU for Malaysian owner MISC using Mark membrane technology.
• MISCmajorStrategic or Co-development Partner · 13 May 2026Malaysian shipping company MISC orders 170,000 m³ FSRU from Samsung Heavy Industries featuring GTT Mark membrane technology.
• Samsung Heavy IndustriescoreChannel Partner/ Reseller/ Distributor · 24 April 2026Samsung Heavy Industries orders GTT tank designs for LNG carriers including 180,000 m³ vessels for Celsius Tankers and 174,000 m³ vessels for Asian shipowners.
• Celsius TankersmajorStrategic or Co-development Partner · 24 April 2026Celsius Tankers commissions two LNG carriers with 180,000 m³ capacity from Samsung Heavy Industries using GTT Mark III Flex technology.
• Hudong-Zhonghua ShipyardcoreChannel Partner/ Reseller/ Distributor · 25 March 2026Hudong-Zhonghua orders GTT tank designs for four LNG carriers with 174,000 m³ capacity featuring membrane containment systems.
• DaneleccoreStrategic or Co-development PartnerGTT acquired Danelec, a maritime digital solutions company specializing in VDR and data acquisition systems, strengthening GTT Marine division.
• Ascenz MarorkacoreStrategic or Co-development PartnerGTT subsidiary combining Ascenz fuel monitoring and Marorka performance monitoring expertise for maritime digital solutions.
• Vessel Performance Solutions (VPS)coreStrategic or Co-development PartnerGTT subsidiary specializing in advanced vessel performance analysis using physics-based modeling for fleet benchmarking and emissions compliance.
• CryovisioncoreStrategic or Co-development PartnerGTT subsidiary providing membrane testing and thermal integrity assessment services for LNG vessels.
• GTT TrainingcoreStrategic or Co-development PartnerGTT subsidiary providing LNG operations training including simulator training for LNG and liquefied gas operations.
• BW LNGmajorStrategic or Co-development PartnerShipowner BW LNG commissioning four newbuildings with HD KSOE featuring world's first 177,000 cbm three-cargo-tank LNG carriers using GTT technology.
• Celsius TankersmajorStrategic or Co-development PartnerShipowner Celsius Tankers ordering LNG carriers from Samsung Heavy Industries with GTT Mark III Flex technology.
• CMA CGMmajorStrategic or Co-development PartnerCMA CGM collaborating with GTT on 27 LNG-powered container ships including 23,000 TEU Jacques Saadé with 18,600 m³ LNG fuel tank.
• Cedar LNGminorStrategic or Co-development PartnerCedar LNG ordering 180,000 m³ FLNG vessel from SHI featuring GTT Mark III Flex technology.

Scale indicators13 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Wärtsilä: Wärtsilä provides LNG fuel systems, cargo handling, and digital maritime solutions that compete directly with GTT's membrane LNG fuel tanks and GTT Marine platform. Both serve shipowners and shipyards with integrated LNG-related equipment and ship performance software.
• Chart Industries: Chart Industries manufactures LNG equipment including cryogenic heat exchangers, tanks, and liquefaction components that overlap with GTT's LNG infrastructure offerings. Both supply EPC contractors and operators building LNG storage, transport, and regasification capacity.
• TGE Marine Gas Engineering: TGE Marine provides independent LNG cargo containment systems (Type C and B) for gas carriers, FSRU, and small-scale LNG applications. It competes with GTT in LNG and multi-gas carrier containment, particularly for smaller vessel classes.
• Moss Maritime (Wilhelmsen Technologies): Moss Maritime (now part of Wilhelmsen Technologies) designs Moss-type spherical LNG containment systems, the principal alternative to GTT's membrane technology. Moss tanks are specified on a meaningful share of LNG carriers, placing Moss in direct competition for newbuild tank design contracts.

Others

• Samsung Heavy Industries: Samsung Heavy Industries is a major shipyard customer of GTT, ordering tank designs for LNG carriers and FSRUs. It is a channel partner and builder rather than competitor, but represents significant concentration in GTT's order book.
• Hanwha Ocean: Hanwha Ocean is a Korean shipyard customer of GTT ordering 174,000 cbm LNG carrier tank designs. Operates as a channel partner and builder rather than competitor in containment technology.
• HD Korea Shipbuilding & Offshore Engineering: HD KSOE is one of GTT's largest shipyard customers (commissioning 177,000 cbm three-tank LNG carriers for BW LNG). As a major LNG carrier builder, it is a channel partner rather than direct competitor, but operates adjacent technology development for LNG containment.

Emerging players

• ABB Marine & Ports: ABB Marine provides digital solutions, vessel control systems, and electric propulsion — overlapping with GTT Marine's digital platform offerings (Ascenz Marorka, VPS). Competes in maritime digitalization rather than cryogenic containment.
• Höegh LNG: Höegh LNG operates FSRUs using GTT-licensed containment technology. It is both a customer (technology licensee) and an adjacent player in LNG infrastructure services, providing a partial overlap with GTT's expanding FSRU business.

Broad incumbents

• MAN Energy Solutions: MAN Energy Solutions supplies marine engines, turbochargers, and propulsion systems including dual-fuel LNG engines. It is a broader incumbent serving LNG-fueled shipping, with overlapping customer base but a different product focus than GTT's containment systems.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UC01KVs037peI4Yrc5RVNdxg/videos
• LinkedInlinkedin.com/company/gaztransport-&-technigaz

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries6 records

Funding overview

Funding rounds

Investors

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

M&A2 records

Investments2 records

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

Frequently asked questions about Gaztransport & Technigaz