THAILANDSICThailand Standard Industrial Classification

TSIC Activity

43901

Construction of foundations, including pile driving

ประกอบกิจการให้บริการรับเจาะเสาเข็มทุกชนิด

What this activity covers

Companies in this sector focus on foundation construction and pile driving activities.

  • Foundation construction — Activities related to building foundations
  • Pile driving — Driving piles into the ground for support
  • Machinery rental — Rental of machinery for foundation work under supervision
  • Construction contracting — Contracts for foundation and related construction work
  • Piling services — Providing various types of piling solutions

What companies here also do

Seen in real company registrations under this code — beyond the official definition, so licensing may differ.

  • Concrete contracting — Services related to concrete work
  • Land filling — Activities involving land filling processes
  • Pile testing — Testing of piles for structural integrity
  • Transportation services — Transporting materials and equipment for construction

Not included here

  • Renting of machinery and equipment for construction work without control. See activity 77305.

Foreign ownership

List 3: Restricted, FBL/BOI route availableinherited from 43

Construction, except construction of infrastructure providing basic public services in public utilities or transport that requires special apparatus, machinery, technology or expertise, and except other categories prescribed in ministerial regulations

The infrastructure carve-out is subject to a minimum foreign capital requirement, subject to capital thresholds, verify current figures.

FBA B.E. 2542, List 3 (10)Routes: Foreign Business Licence, BOI promotion, US Treaty of Amity

Auto-mapped, verify against the Act. These TSIC mappings are indicative, not legal advice; the schedules of the Foreign Business Act B.E. 2542 are the authority. See the full foreign ownership reference.

Industry at a glance

as of 23 ก.ค. 69

The whole registered industry under this activity, every registration year, from the DBD DataWarehouse.

696
active companies operate here
฿4.0Bregistered capital, combined
฿14.6B
Sector revenue · 2025
-4% since 2023
฿852.0M
Net profit · 2025
357 profitable
202320242025

net profitrevenue

Foreign investment

new registrations · 2026 YTD
0%of new registered capital is foreign-held
฿0 foreign฿22.0M Thai

Almost entirely Thai-held — little foreign capital enters here.

1 of the 5 largest companies here are foreign-owned Thailand subsidiaries.

New in 2026

19-13.6%

registrations, YTD

Registered capital

฿4.0B+4.1%

since year-end

Largest by revenue

Latest filed-year revenue, not a multi-year total

  1. 1Seafco Public Company Limited฿1.6B
  2. 2Pylon Public Company Limited฿1.5B
  3. 3Thai Maruken Co., Ltd.฿858.1M
  4. 4Italthai Trevi Co., Ltd.฿856.4M
  5. 5Production Solutions (Thailand) Co., Ltd.intl฿708.6M

Largest by registered capital

  1. 1Thai Bauer Co., Ltd.Bangkok฿410.0M
  2. 2Seafco Public Company LimitedBangkok฿406.8M
  3. 3Pylon Public Company LimitedBangkok฿374.9M

Source: Department of Business Development DataWarehouse. Financial figures are combined totals of companies that filed statements; revenue and profit shown for the latest three reporting years.

Companies registered since 2022

Browse all

New DBD registrations under this activity since 2022, the period the registry snapshot covers, not the full historical register.

166
Registered
since 2022
160
Still active
6
Dissolved
฿1.0M
Median capital
of active

New registrations per year

2022peak 46 in 20232026

Largest active companies by registered capital

Source: Department of Business Development (DBD) new-registration records, 2022 to present. Counts cover companies first registered in that window, reflect the latest snapshot load, and may lag the live register.

Emerhub

Restricted activity? There is usually a route.

Emerhub structures foreign-owned companies around FBA restrictions: Foreign Business Licence applications, BOI promotion, and compliant shareholding structures. Talk through your case before you commit to one.

Talk to Emerhub Thailand