What Flensburger Schiffbau-Gesellschaft does

Flensburger Schiffbau-Gesellschaft (FSG Shipyard GmbH) is a German shipbuilder founded in 1872 in Flensburg, designing and constructing bespoke commercial and naval vessels. Its core products are RoRo cargo ferries (RoRo 4100 and RoRo 7100 platforms), RoPax/ConRo ferries, offshore vessels (seismic survey, well intervention, multifunctional transport), and naval support vessels (Berlin Class replenishment, Elbe Class supply, Oste Class reconnaissance, and Point Class sealift ships). Technical differentiation rests on under-shelter steel-structure manufacturing up to approximately 200m × 32.2m, multiple iterations of proven RoRo hull forms, and integration of LNG and other low-emission propulsion systems.

The company generates revenue through project-based new-build contracts (typically €100M–€140M per major vessel for RoRo ferries, with deliveries driving revenue recognition), plus lifecycle services such as fleet repair and maintenance, vessel conversions, and contract steel-structure manufacturing. Customers span global commercial ferry operators — SeaRoad, SIEM, Irish Ferries, Brittany Ferries, BC Ferries, Moby, DFDS, Oceanex — and government/defense accounts including the German Navy and British Armed Forces. Sales are predominantly direct, long-cycle enterprise engagements, often with repeat orders from the same operator across multiple vessels.

FSG went through insolvency and a transferred restructuring in 2020 under Tennor Holding (Lars Windhorst), re-emerging with about 350–380 employees and an order book anchored by IVP Ship Invest and SeaRoad. In 2025 it was further integrated into the Heinrich Rönner Gruppe and rebranded as FSG Shipyard GmbH, while expanding into climate-compatible propulsion through a DLR-commissioned hydrogen/ammonia/LNG/battery research vessel. Current leadership comprises Managing Directors Thorsten Rönner and Frank Mallon; operations were recently disrupted by a cyber-attack but have resumed.

Name

Flensburger Schiffbau-Gesellschaft

Legal name

FSG Shipyard GmbH

Website

https://fsg-ship.de

Company type

Private

Founded year

1872

Operating status

Operating

Headcount range

501–1,000 employees

Short description

FSG Shipyard GmbH, founded in 1872 in Flensburg, Germany, designs and builds bespoke RoRo and RoPax ferries, offshore vessels, and naval support ships for global commercial operators and NATO navies.

Ownership category

akta.pro rank

Product category

Commercial Shipbuilding

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (3366)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Auxiliary & Logistics Naval Vessels (Replenishment, Support, Hospital) (IMAJABAD)

akta.pro secondary industries

Project Management & Owner’s Engineering / Technical Consultancy (Spec Writing, Bid Support, Site Support) (IMAJAGAO), Naval & Government Vessel Maintenance & Modernization (TLAKAKAB), Hull, Structure & Steelwork Repair (TLAKAKAE)

Keywords

• RoRo ferry construction
• Naval shipbuilding
• Offshore vessel design
• Ship repair services
• Steel structure fabrication

Headquarters

HQ city

Flensburg

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. New Ship Construction: FSG generates primary revenue through designing and building new ships. Each project is bespoke, with contracts ranging from €100 million to €140 million for RoRo ferries. Revenue is recognized upon delivery of completed vessels. The company builds RoRo vessels, RoPax ferries, offshore vessels, and naval ships for commercial and government customers.
2. Naval Ship Construction and Support: Construction of naval vessels for German Navy and NATO countries, including logistic support vessels, replenishment ships, reconnaissance ships, and sealift ships. Also includes fleet repair and maintenance services for naval customers.
3. Fleet Repair and Maintenance: Maintenance and repair services for customer vessels to ensure availability and reliability. Part of lifecycle support for naval and commercial customers.
4. Steel Structure Manufacturing: Contract manufacturing of steel structures including ship sections, large modules (blocks), and ship hulls. Can include construction, purchase of steel and outfittings, and integration of outfittings into steel structures.
5. Vessel Conversion: Conversion of existing vessels to integrate demanding requirements and new capabilities. One of FSG's service offerings beyond new construction.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels3 records

Core offering

FSG Shipyard GmbH designs, engineers, and constructs custom commercial and naval vessels from its Flensburg shipyard in Germany. Its core offerings include RoRo cargo vessels (RoRo 4100 and 7100 platforms), RoPax and ConRo ferries, naval support and sealift ships, offshore seismic and well intervention vessels, vessel conversion, fleet repair and maintenance, and contract manufacturing of large steel structures up to 200m x 32.2m.

Product overview

FSG Shipyard GmbH is a shipbuilding company founded in 1872 that designs and constructs custom vessels. The offering consists of core shipbuilding services across commercial and defense sectors. Commercial shipbuilding includes RoRo vessels (RoRo 7100 and 4100 series for customers like Moby, DFDS, SeaRoad), ConRo vessels (Oceanex Connaigra), and RoPax/ferries (Irish Ferries, Brittany Ferries, BC Ferries). Defense capabilities include naval support vessels (Berlin Class replenishment ships, Elbe Class supply ships, Oste Class reconnaissance ships) and Point Class Sealift ships for NATO. Offshore operations produce Well Intervention Vessels (Siem Helix I) and Seismic Vessels (Amazon Warrior). Additionally, the shipyard offers steel structure manufacturing for ship sections and large modules up to 200m in length. The company operates as part of the Heinrich Rönner Gruppe following its 2024 integration.

Differentiator

Problem solved

Functional benefit

Products and services

• RoRo Vessels (RoRo 4100 and RoRo 7100 series)

Quantifiable outcome

• World market leader position in RoRo ship segment
• +3 more outcomes

Named customers13 records

Segments4 records

Ideal customer profiles4 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• DLR (German Aerospace Center)coreStrategic or Co-development Partner · 17 August 2025DLR commissioned FSG to construct a 48-meter research vessel as a floating laboratory for climate-compatible propulsion systems (hydrogen, ammonia, LNG, batteries). Steel cutting takes place at FSG with final assembly in Bremerhaven. The vessel will be used as a test environment for developing highly automated and autonomous ship technologies.

Scale indicators11 records

Recent moves7 records

Expansion highlights5 records

Broad incumbents

• Fincantieri: Italy's largest shipbuilder and a global leader in cruise ships, RoPax ferries, and naval vessels. Fincantieri directly competes with FSG in the RoPax segment and in European naval logistics programs.
• Navantia: Spanish state-owned shipbuilder focused on naval vessels and RoPax ferries. Navantia competes with FSG in both NATO naval logistics contracts and European RoPax ferry tenders.
• Damen Shipyards: Dutch shipbuilding group with a broad portfolio including naval auxiliaries, ferries, and offshore vessels. Comparable to FSG across multiple vessel segments, particularly in European naval and offshore work.
• ThyssenKrupp Marine Systems (TKMS): Germany's leading naval submarine and surface combatant shipbuilder. TKMS is a major German naval prime that competes with FSG for selected German Navy and export naval logistics contracts.
• Chantiers de l'Atlantique: France's largest shipbuilder, with strong positions in cruise ships and large RoPax ferries. Comparable to FSG in building complex passenger ferries for European operators.

Direct peers

• Meyer Werft: German cruise and RoPax ferry shipbuilder based in Papenburg. Meyer Werft is the most direct European competitor to FSG in complex passenger and vehicle ferries, serving many of the same European shipping operators.
• Fr. Fassmer GmbH & Co. KG: German mid-sized shipyard building specialized vessels, ferries, and naval auxiliaries. Fassmer is comparable in scale and product mix to FSG, particularly in small-to-mid RoPax ferries and naval support vessels.
• Blohm+Voss: Hamburg-based shipyard specializing in complex naval, offshore, and specialized vessels. Blohm+Voss competes head-to-head with FSG in German naval and high-end offshore vessel contracts.
• German Naval Yards Kiel: Kiel-based naval shipyard (formerly HDW and ThyssenKrupp surface vessels). It is a direct competitor to FSG for German Navy surface combatant and auxiliary vessel programs.
• VARD (Fincantieri): Norwegian offshore and specialized vessel builder (now part of Fincantieri). VARD is directly comparable to FSG's offshore capabilities, particularly in well intervention and offshore support vessels.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 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 Flensburger Schiffbau-Gesellschaft