What Marsun Co., Ltd. does

Marsun Public Company Limited is a Thai shipbuilder and ship repairer headquartered in Samut Prakan, near the mouth of the Chao Phraya River approximately 2 km from the Gulf of Thailand. Founded on 10 June 1980 and operating from a 51,000 sq.m. yard with a deep-water graving dock (17x80m) capable of accommodating vessels up to 3,000 tons displacement, the company has delivered 355+ vessels across 45 years. It maintains an in-house engineering organisation of approximately 80 technical staff (50+ engineers, 30+ draftspersons, 25+ QA engineers) and is certified to ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 by SGS, with classification society approvals enabling build and repair of vessels up to 100 metres.

The company's product portfolio spans three categories: naval and patrol vessels (M-series patrol boats from M10 through M58, plus T992–T996 patrol gun boats), commercial offshore vessels (Trimaran Crew Transfer Vessels co-designed with WIND Naval Architects and One2three Naval Architects, 36m Crew/Utility Boats, 41.85m Multi-Purpose Vessels), and custom yachts (e.g., a 34.16m sailing schooner for maritime education). Core engineering capabilities include aluminium, steel, and FRP hull construction, semi-SWATH hull forms with forward and aft foils, three-independent-driveline trimaran architecture, waterjet propulsion, and licensed-build of BAR Technologies' BARTech 30 active-hydrofoil offshore wind workboat. Engineering-based ship repair and design consulting round out the service offering.

Marsun generates revenue primarily through project-based, one-time contracts for custom vessel construction and through professional-services revenue from ship repair, maintenance, and naval architecture consulting. Pricing is not publicly disclosed and is handled via direct inquiry and quotation. Go-to-market is enterprise field sales — direct engagement with government procurement processes (Royal Thai Navy, Thai Customs Department, Thai Marine Police, Thai Maritime Enforcement Command Center, Pakistan Navy, Sultanate of Oman MoD) and commercial clients in oil and gas (Chevron Thailand, PTTEP), offshore wind, and marine offshore services (Uniwise Offshore, U-Ming Marine). Customer segments are weighted toward government/defence and oil and gas/offshore, with yacht/luxury vessels as a secondary segment. The company has been expanding internationally since 2000, with the December 2024 Oman MoD contract representing its most material international defence win to date.

Name

Marsun Co., Ltd.

Legal name

Marsun Public Company Limited (บริษัท มาร์ซัน จำกัด (มหาชน))

Website

https://marsun.th.com

Company type

Public

Founded year

1980

Operating status

Operating

Headcount range

251–500 employees

Short description

Marsun Public Company Limited is a Thai shipbuilder and ship repairer founded in 1980, designing and constructing custom naval patrol vessels, offshore crew transfer boats, and yachts for government defence agencies and commercial marine operators across Asia and the Middle East.

Ownership category

akta.pro rank

Product category

Shipbuilding and Ship Repair

NAICS

Ship Building and Repairing (336611), Ship and Boat Building (3366), Ship and Boat Building (33661)

SIC

Ship & Boat Building & Repairing (3730)

akta.pro primary industry

Offshore Support Vessel (OSV) Newbuilds (PSV, AHTS, ERRV) (IMAJACAA)

akta.pro secondary industries

Production Design & Detailed Engineering (3D CAD, Drawings, BOM, Nesting) (IMAJAGAK), Luxury Catamaran (Power & Sail) Manufacturing (IMAJAMAF)

Keywords

• Shipbuilding services
• Ship repair
• Naval vessels
• Patrol boats
• Commercial marine construction

Headquarters

HQ city

Muang Samut Prakan

HQ country

Thailand

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Ship Building: Marsun designs and constructs custom-built vessels to customer specifications, including naval and patrol vessels, commercial boats, and luxury yachts. Revenue is generated through one-time project-based contracts for new vessel construction. Vessels are built in aluminium, steel, and composite materials.
2. Ship Repair and Maintenance Services: Engineering-based repair and maintenance services covering hull, mechanical and propulsion systems, electrical/navigation/weapon systems, interior works, certified welding, paint and coatings, surface treatment, and onboard repair. Services delivered both at the shipyard and on-site.
3. Design and Consulting Services: Provision of vessel design, structural engineering, and consulting services according to customer requirements, including naval architecture, marine engineering, and classification society compliance.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels3 records

Core offering

Marsun Public Company Limited is a custom shipbuilder and ship repairer that designs, engineers, and constructs vessels in aluminium, steel, and fiber-reinforced polymer (FRP) materials for government defence agencies and commercial marine clients. The company's product portfolio spans naval and patrol vessels (patrol boats, gun boats, fast assault craft), commercial offshore boats (trimaran crew transfer vessels, crew/utility boats, multi-purpose oil spill response vessels), and sailing yachts. In addition to newbuild construction, Marsun delivers engineering-based ship repair, maintenance, and design consulting services both at its Samut Prakan shipyard and on-site at client locations.

Product overview

Marsun is a shipbuilding and ship repair company offering a comprehensive portfolio of vessels including Naval and Patrol Vessels (14 products such as M36, M39, M58 Patrol Boats, T992-T996 Patrol Gun Boats), Commercial Boats (3 products including Trimaran Crew Transfer Vessel, 36m Crew/Utility Boat, 41.85m Multi Purpose Vessel), and Yachts (34.16m Sailing Schooner). The company provides design, construction, and repair services for government agencies and private sectors domestically and internationally.

Differentiator

Problem solved

Functional benefit

Products and services

• Trimaran Crew Transfer Vessel High-Speed Passenger Trimaran CTV for Offshore Windfarm with aluminium hull, three independent drivelines, semi-SWATH features, forward and aft foils, and ballast systems enabling excellent seakeeping at high sea states up to 4m wave height. Designed by WIND Naval Architects in association with One2three Naval Architects.
• M36 Patrol Boat Well-proven patrol boat design accepted for Royal Thai Navy with maximum speed exceeding 28 knots and range of 1,300 nautical miles at cruising speed. Designed for maritime patrol requirements.
• 34.16m Sailing Schooner Two-masted staysail schooner sailing yacht accommodating 26 students and 10 professional crew for ocean sailing, designed by Langan Design and Associates with 437 sq.m. sail area. Built for maritime education institutions including Seamester for 90-day circumnavigation programs.
• 36m Crew/Utility Boat Well proven design with 14 deliveries to PTTEP, featuring external fire-fighting system with 1200 cu.m/hr capacity, bow thruster, and classification by Bureau Veritas. Designed for offshore oil and gas crew and utility operations.
• 41.85m Multi Purpose Vessel Multi-purpose vessel for oil spill response, search and rescue, and fire fighting operations with steel hull/aluminium superstructure, 20+ knots max speed, and 1000+ n.m. range.
• M10 High Speed Patrol Boat (MKIII) Newest M10 design with solid shelter for crew protection, designed for Thai Marine Police river and coastal operations, insertion/extraction, and fast interception missions.
• M58 Patrol Gun Boat
• T995-T996 Patrol Gun Boat 41.45-meter patrol gun boat with 27+ knots speed, 1500+ n.m. range, steel hull/aluminium superstructure, designed by Naval Dockyard and Marsun.
• T992-T993 Patrol Gun Boat 38.70-meter patrol gun boat with 30mm machine gun aft, designed for law enforcement and search and rescue operations.
• M39 Patrol Boat 38.85-meter patrol boat with 32+ knots speed, 1300+ n.m. range, capable of patrol operations up to sea stage 5 and passages in sea state 6.
• Ship Repair Services Engineering-based repair services covering hull (steel, aluminium, composite), mechanical and propulsion systems, electrical/navigation/weapon systems, interior works, certified welding, paint and coatings, surface treatment, and onboard repair. Services delivered both at the Samut Prakan shipyard and on-site.

Quantifiable outcome

• 355+ vessels delivered to government and private sector customers domestically and internationally
• +5 more outcomes

Named customers10 records

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Six partnerships are on record, tiered core.

• BAR Technologies (BAR Tech)coreTechnology or Integration · 2 November 2022Strategic technology partnership for licensed construction of BARTech 30 offshore wind support vessels in Thailand and Southeast Asian markets. BARTech 30 features ProA design with active hydrofoil system delivering 30% fuel/emissions reduction. First vessel Seacat Columbia deployed with Equinor on Dudgeon wind farm. Partnership enables Marsun to serve the growing Asian offshore wind sector.
• WIND Naval ArchitectscoreStrategic or Co-development PartnerCo-development partner for trimaran vessel designs. WIND Naval Architects designed the Trimaran Crew Transfer Vessel and WIND Flyer Trimaran Fast Crew Boat in association with One2three Naval Architects. Partnership has produced Thailand's first trimaran CTV (Uniwise Commander) and the innovative WIND Flyer series.
• One2three Naval ArchitectscoreStrategic or Co-development PartnerCo-design partner alongside WIND Naval Architects for trimaran crew transfer vessel design. Contributed to the advanced hull architecture combining three independent drivelines with foil and semi-SWATH features.
• Uniwise OffshorecoreStrategic or Co-development PartnerLong-term customer and development partner for crew transfer vessels. Ordered 35M WIND Flyer Trimaran Fast Crew Boat for Chevron Thailand operations, and multiple prior crew/utility boats. Uniwise Commander naming ceremony held June 2026 at Sattahip naval base.
• Chevron Thailand Exploration and ProductioncoreGTM or Marketing PartnerPrimary end-customer for offshore crew transfer vessel projects. Partnered with Marsun and Uniwise Offshore for the Uniwise Commander Trimaran CTV project - Thailand's first trimaran crew transfer vessel for offshore oil and gas operations. Chevron serves as vessel charterer.
• Thai Shipbuilding and Repairing AssociationcoreStrategic or Co-development PartnerMarsun is a member and key signatory to MOU (March 2026) with the Thai Shipbuilding and Repairing Association and 8 industry partners to advance large-scale domestic shipbuilding projects, aiming for frigate construction to strengthen national industrial security and reduce reliance on foreign shipbuilders.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• SAFE Boats International: US-based aluminium patrol boat builder serving coast guards, law enforcement, and military customers. Comparable to Marsun in aluminium construction and law enforcement/marine patrol customer focus (e.g., Thai Marine Police).
• Incat Tasmania: Tasmania-based aluminium shipbuilder famous for high-speed catamarans and wave-piercing vessels for ferry and military markets. Comparable to Marsun in aluminium construction technology and high-speed commercial vessel expertise.
• Fr. Fassmer GmbH & Co. KG: German shipbuilder specializing in patrol boats, fast intervention craft, and special-purpose vessels for coast guards and navies worldwide. Comparable to Marsun in custom-built naval patrol vessel focus and quality-led positioning in defence markets.
• Austal Limited: Australian aluminium vessel specialist building naval patrol boats, fast ferries, and trimaran designs. Comparable to Marsun in aluminium hull construction expertise, naval/defence customer base, and exposure to high-speed craft markets including CTVs.
• FB Design / FBD Fast Patrol Boat Builder: Turkish fast patrol boat specialist supplying high-speed interceptors to multiple navies. Comparable to Marsun in fast patrol craft designs and international defence customer base.
• CMN (Constructions Mécaniques de Normandie): French builder of fast patrol boats, interceptors, and special-purpose vessels for navies and coast guards worldwide. Comparable to Marsun in fast patrol craft designs and international defence export focus.

Broad incumbents

• Vigor Industrial (Vigor Shipyards): Major US shipbuilding and ship repair company operating multiple yards on the US West Coast and East Coast. Comparable to Marsun in combined shipbuilding and ship repair service offering for defence and commercial customers.
• Damen Shipyards Group: Major Dutch global shipbuilder with extensive naval, patrol, offshore, and commercial portfolio. Comparable to Marsun across all segments but with significantly larger scale and broader geographic footprint.
• Cheoy Lee Shipyards: Long-established Hong Kong-based shipbuilder serving commercial, patrol, and yacht markets globally. Comparable to Marsun in aluminium and steel construction across patrol vessels and yacht segments with international clientele.

Regional players

• Grandweld Shipyards: UAE-based shipbuilder serving Middle East navies and offshore operators with patrol vessels, offshore support vessels, and crew boats. Comparable to Marsun in regional defence shipbuilding focus and Middle East customer overlap (e.g., Oman MOD).

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/marsunthailand
• LinkedInlinkedin.com/company/marsun-company-limited

Compliance3 records

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 Marsun Co., Ltd.