Saab Kockums
Saab Kockums is a Swedish naval shipbuilder known for submarines, stealth corvettes, mine-countermeasure vessels, and advanced naval systems.
Last updated October 14, 2026
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Overview
Saab Kockums is a Swedish naval shipbuilding company headquartered in Malmö and owned by Saab AB. Its principal activities are the design, construction, modernization, and support of military submarines and surface vessels. Although the Kockums name originated in a much broader nineteenth-century industrial enterprise, the modern business is most closely associated with Swedish naval technology, including submarines equipped with air-independent propulsion, stealth-oriented corvettes, mine-countermeasure vessels, and related combat-system integration. The company traces its industrial roots to Frans Henrik Kockum's mechanical workshop in Malmö. Established during 1840–1841, the workshop initially produced agricultural machinery, stoves, engines, castings, and other industrial goods. It entered railway-carriage production in the nineteenth century and later expanded into shipbuilding, bridges, cranes, refinery machinery, and other heavy-industrial products. A related Kockum enterprise in Blekinge developed steel, iron, galvanizing, and enamel operations. These activities were reorganized over time, creating a diversified industrial group whose shipyard eventually became its most strategically important business. Kockums became a major Swedish shipbuilder before and after the First World War. It constructed naval vessels, ferries, cargo ships, tankers, submarines, destroyers, coastal battleships, and icebreakers. During the 1950s, the Malmö yard ranked among the world's largest shipyards by output and delivered substantial tonnage, particularly in large commercial vessels. The company also operated a shipping line and maintained a wider workshop business after acquiring Landsverk in 1948. The global shipbuilding downturn changed the company's direction. Competition from East Asian yards, the 1973 oil crisis, and the subsequent recession contributed to a severe Swedish shipyard crisis from the late 1960s through the 1980s. Kockums came under Swedish state control through Svenska Varv and later Celsius. Commercial shipbuilding declined, while submarine and defence work gained importance because of its value to Swedish national security and industrial capability. Kockums developed a notably quiet Stirling-engine air-independent propulsion system for submarines, helping establish its international reputation in conventional submarine technology. Kockums also participated in international submarine and surface-vessel programs. In the 1980s it helped establish the Australian Submarine Corporation and contributed technology to the Collins-class submarine program. It acquired Karlskronavarvet in 1989, bringing additional naval construction capacity and fibreglass expertise into the organization. In 1999, following Saab's acquisition of Celsius, Kockums was sold to Germany's Howaldtswerke-Deutsche Werft. HDW later became part of ThyssenKrupp Marine Systems. Relations between Kockums, its German owners, and Sweden's Defence Materiel Administration became increasingly difficult, particularly around the proposed A26 submarine. Swedish authorities viewed the program as a basis for a new generation of nationally controlled submarines and a potential export product. ThyssenKrupp regarded the project as commercially risky and questioned the predictability of development costs. The disagreement contributed to the cancellation of the initial order and intensified political concern over Sweden's access to sovereign submarine expertise. Following Russia's annexation of Crimea in 2014, Sweden placed renewed emphasis on domestic defence-industrial capability. Saab reached an agreement to acquire Kockums from ThyssenKrupp, with the transaction completed on 22 July 2014. Under Saab ownership, the business became part of Saab's naval portfolio and continued work on submarines, surface combatants, naval systems, and modernization programs. Saab Kockums subsequently sought international opportunities, including cooperation with Damen on future Dutc…
History
The Kockums industrial story began in Malmö in the nineteenth century. Frans Henrik Kockum, who had built wealth through tobacco manufacturing, acquired land south of central Malmö in 1838. Between 1840 and 1841 he established a forge and mechanical workshop. The early factory produced agricultural equipment, stoves, portable engines, incubators, spittoons, and other cast-metal goods. It later moved into railway-carriage production, delivering its first railway carriage in 1859 and expanding into sleeper cars, bogie carriages, and dining cars. In 1866 the business became a public company under the name Kockums Mekaniska Werkstad. A related Kockum enterprise developed in Blekinge. Kockum and partners acquired Kallinge mill near Ronneby in 1849 and established a copper refinery. After the partners left, the operation evolved into an iron mill in 1858 and became Kockums Jernverks AB in 1875. It specialized in iron and steel, galvanizing, and enamel products. Before the First World War, the broader Kockum interests underwent structural specialization: the Malmö operation concentrated increasingly on ships, railway vehicles, and bridges, while the Blekinge business focused on metals and finished steel products. The Malmö shipyard expanded significantly from the late nineteenth century. Between 1899 and 1913 it built sixteen ships, including vessels for the Swedish Navy. Its later naval output included coastal defence ships, destroyers, submarines, and torpedo boats. The yard also constructed ferries, icebreakers, tankers, cargo vessels, and merchant ships, while continuing work on bridges, cranes, sugar-refinery machinery, and steam engines. Tanker production became particularly important from 1927 onward. The acquisition of Landsverk in 1948 added further workshop and engineering activities. Kockums reached a high point during the post-war commercial shipbuilding boom. The Malmö yard became one of the world's largest shipyards and delivered exceptionally high tonnage in 1952 and 1953. Large cargo ships dominated much of this period, although naval work and submarine construction remained important. A shipping line was also operated alongside manufacturing. The international shipbuilding crisis from the late 1960s through the 1980s transformed the company. Asian competition, the 1973 oil shock, and the resulting recession weakened European commercial shipbuilding. From 1979 through 1999 Kockums was controlled by the Swedish state through Svenska Varv and subsequently Celsius. As commercial construction contracted, naval projects became central to the company's survival and strategic importance. Kockums developed an advanced Stirling-engine air-independent propulsion system intended to provide quiet, extended underwater endurance for conventional submarines. It built and supported several Swedish submarine classes, including Näcken, Västergötland, Södermanland, and Gotland. The company also became involved in international submarine work. In the mid-1980s it helped create the Australian Submarine Corporation, which constructed Collins-class submarines for Australia. In 1989 Kockums acquired Karlskronavarvet, strengthening its naval production base and adding expertise in fibreglass construction. In 1999 Kockums was sold to Howaldtswerke-Deutsche Werft after Saab acquired Celsius. HDW was later acquired by ThyssenKrupp in 2005. The period under German ownership produced sustained disagreement with Sweden's Defence Materiel Administration. At the centre was the A26 submarine, a proposed new Swedish submarine design incorporating classified technical developments. Swedish officials wanted the program to preserve domestic know-how and create a platform with export potential. ThyssenKrupp considered the project financially uncertain and argued that development costs could not be reliably forecast. The disagreement contributed to the cancellation of the original A26 order and a wider dispute over whether Kockums should focus on large submarines or smaller designs. The dispute became politically sharper after Russia's annexation of Crimea in March 2014. Swedish defence policy increasingly emphasized nationally controlled industrial capacity. Saab had attempted to negotiate a purchase of Kockums in 2013, but the talks failed over conditions surrounding the A26 program. In April 2014, FMV conducted a highly unusual repossession operation at the Malmö shipyard to recover its property and classified material. The incident symbolized the breakdown in trust between the Swedish customer and Kockums' German owner. ThyssenKrupp subsequently opened negotiations with Saab, and Saab completed the acquisition on 22 July 2014. Saab Kockums became part of Saab's naval defence organization, with operations in Malmö, Muskö, Docksta, and Karlskrona. The company continued to work on submarines, corvettes, naval systems, modernization, and international partnerships. It cooperated with Damen on a potential Dutch submarine program and later made an unsuccessful proposal connected with Australia's future submarine requirement. Its history also includes the Kockums Crane, a 138-metre shipyard crane installed in 1973–1974. Capable of lifting 1,500 tons, it became a Malmö landmark before being dismantled and shipped to Ulsan, South Korea, in 2002. Today, the Kockums name primarily denotes a specialized Swedish naval shipbuilding and defence capability rather than the diversified industrial group that originally carried it.
- 2014
Saab acquired Kockums
[1]Saab completed the purchase of Kockums from ThyssenKrupp, restoring Swedish ownership of the naval business.
- 2002
Kockums Crane moved to South Korea
[1]The landmark crane was dismantled and shipped to Ulsan after being sold to Hyundai Heavy Industries.
- 1999
Kockums transferred to HDW
[1]Following Saab's acquisition of Celsius, Kockums was sold to Howaldtswerke-Deutsche Werft.
- 1989
Karlskronavarvet acquired
[1]The acquisition strengthened Kockums' naval construction capabilities and added fibreglass expertise.
- 1979
Swedish state control began
[1]Kockums entered state control through Svenska Varv during the Swedish shipbuilding crisis.
- 1974
Kockums Crane installed
[1]A 138-metre crane with a 1,500-ton lifting capacity was completed at the Malmö shipyard and became a prominent city landmark.
- 1952
Kockums ranked among the world's leading shipyards by tonnage
[1]The Malmö yard delivered exceptionally large output during the post-war commercial shipbuilding boom.
- 1948
Landsverk acquired
[1]The acquisition broadened Kockums' workshop and industrial-engineering activities.
- 1927
Tanker construction expanded
[1]The shipyard began delivering substantial numbers of tankers while retaining naval and general engineering activities.
- 1899
Major naval shipbuilding period began
[1]Kockums entered a period of significant naval and commercial ship construction, including vessels for Sweden's navy.
Products and positioning
A Swedish-controlled naval defence specialist focused on submarines, stealth surface vessels, advanced propulsion, naval engineering, and strategic lifecycle support.
Military submarines
Gotland-class submarines
A Swedish conventional submarine class associated with Kockums' quieting, underwater endurance, and air-independent propulsion expertise. The class is one of the company's best-known modern submarine programs and illustrates its focus on relatively compact boats optimized for operations in challenging littoral and Baltic environments.
Stealth surface combatants
Visby-class corvettes
A class of Swedish stealth-oriented corvettes designed for low observability and flexible coastal operations. The vessels use advanced materials and shaping to reduce their signatures and support missions such as surface warfare, surveillance, mine warfare, and antisubmarine operations.
Submarine propulsion
Stirling air-independent propulsion system
Kockums developed a submarine propulsion approach based on a highly advanced Stirling engine. Air-independent propulsion allows a conventional submarine to remain submerged for longer periods without relying solely on atmospheric air, while the system's low-noise characteristics support stealth and survivability.
International submarine program
Collins-class submarine technology
Kockums participated in the Australian Submarine Corporation and contributed technology and expertise to the Collins-class submarine program for the Royal Australian Navy. The program represented one of the company's most important international industrial collaborations.
Next-generation military submarine
Blekinge-class submarine
Also known as the A26 program, the Blekinge class is intended to provide Sweden with a new generation of conventionally powered submarines. The program emerged from a prolonged dispute over development risk, ownership, and the strategic value of maintaining sovereign Swedish submarine design capability.
Naval surface vessels
Mine-countermeasure vessels
Kockums has built and supported mine-countermeasure vessels, including the Landsort and Styrsö classes. These ships are designed to locate and neutralize naval mines, with construction and materials suited to operations in shallow and confined waters.
Controversies
2014
FMV repossession confrontation
A dispute between Kockums' German owner and Sweden's Defence Materiel Administration culminated in an armed military-supported operation to recover government-owned equipment and classified material from the Malmö yard. The incident reflected the breakdown in relations surrounding the A26 submarine program and Swedish control of sensitive defence technology.
Marketing campaigns
- 2014Australian Future Submarine bid
Australia
After Saab acquired Kockums, Saab submitted a proposal connected with Australia's SEA 1000 program to replace the Collins-class fleet. The bid competed in a politically sensitive international procurement process and sought to use Saab and Kockums' submarine expertise.
Outcome. Australia later selected a French Naval Group proposal, although that arrangement was subsequently rescinded.
- 2014Dutch next-generation submarine cooperation
Netherlands
Saab and Damen agreed to cooperate on the development, offering, and construction of next-generation submarines, initially targeting the Netherlands' planned replacement of its Walrus-class boats.
- 2000Visby-derived Focused Mission Vessel proposal
United States
Kockums worked with Northrop Grumman and HDW to propose a derivative of the Visby-class corvette for the United States Focused Mission Vessel Study, an early effort related to the later Littoral Combat Ship competition.
Outcome. The proposal was not selected as the basis for the Littoral Combat Ship program.
Brand decisions
2014
Saab restored Swedish ownershipStrategyBackground
The A26 dispute and heightened Swedish security concerns created pressure for a Swedish-controlled naval industrial capability.
Action taken
Saab purchased Kockums from ThyssenKrupp and integrated it into Saab's naval defence activities.
Aftermath
Kockums continued under Saab as a specialist in submarines, corvettes, naval systems, and modernization.
2014
A26 submarine program disputeStrategyBackground
Swedish authorities viewed the A26 as a strategically important next-generation submarine and potential export platform, while ThyssenKrupp considered the classified technical scope and development costs difficult to predict.
Action taken
The initial A26 order was cancelled after the parties failed to agree on risk allocation and development responsibilities.
Aftermath
The dispute helped drive the eventual sale of Kockums to Saab and reinforced Sweden's preference for domestic control of submarine capability.
1999
Sale to Howaldtswerke-Deutsche WerftM&ABackground
The sale followed Saab's acquisition of Celsius and the restructuring of Swedish state-linked industrial assets.
Action taken
Kockums was transferred to HDW and later became part of ThyssenKrupp Marine Systems.
Aftermath
Ownership moved outside Sweden, contributing to later disagreements over submarine strategy, development risk, and national control of defence technology.
1979
Shift toward state-supported naval capabilityStrategyBackground
The Swedish shipbuilding crisis weakened Kockums' commercial shipbuilding business because of overseas competition, the oil crisis, and recession.
Action taken
The company was placed under Swedish state control, while submarine and defence work became increasingly central to its future.
Aftermath
Kockums evolved from a diversified commercial shipbuilder toward a strategically focused naval defence supplier.
Recent events
- 2014
Saab completed its acquisition of Kockums[1]
M&A · Leadership change
ThyssenKrupp agreed to sell Kockums to Saab, and the transaction was completed on 22 July, returning the naval business to Swedish ownership.
- 2014
Saab entered an agreement with Damen on future submarines[1]
M&A · Other
Saab and Damen announced cooperation to develop, offer, and build next-generation submarines, initially with the Netherlands' planned replacement of its Walrus-class boats in view.
- 1999
Kockums sold to HDW after the Celsius transaction[1]
M&A
After Saab acquired Celsius, Kockums was sold to the German shipbuilder Howaldtswerke-Deutsche Werft, changing the company's ownership and strategic context.
- 1989
Kockums acquired Karlskronavarvet[1]
M&A
The acquisition brought the Karlskrona shipyard and its naval construction capabilities, including expertise in fibreglass technology, into Kockums.
- 1980
Kockums contributed to the Collins-class submarine program[1]
Other
Kockums participated in the Australian Submarine Corporation and supplied design and technology contributions associated with the Royal Australian Navy's Collins-class submarines.
- 1979
Kockums placed under Swedish state control during the shipyard crisis[1]
Regulation
Kockums came under the control of the Swedish state through Svenska Varv as the country's commercial shipbuilding sector faced foreign competition, recession, and the effects of the oil crisis.
Sources2 sources
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