Thai Industry Codes With the Most Large Companies, 2026
In short
Thailand's most large-company-heavy five-digit industry code is 10722, a sugar-manufacturing code where 30.18 percent of registered firms are large. That is against a national rate of just 0.7 percent. The vegetable and animal oil code 10420 runs close behind at 22.52 percent large. Meanwhile 490 of Thailand's industry codes count zero large companies at all. Rice growing, cattle raising and vegetable growing each carry hundreds of registered firms and not one large company between them.
Which industry codes concentrate large companies?
Nationally, large companies are rare. Just 13,876 of Thailand's sized companies, 0.7 percent, sit in the top size band (DBD, 2026). At the five-digit TSIC level that rarity turns into extremes. Code 10722, a subclass inside Thailand's sugar-manufacturing group, has 169 registered firms and 51 of them are large, a concentration of 30.18 percent. That is roughly 43 times the national rate. Code 10420, vegetable and animal oil manufacturing, is not far behind at 22.52 percent large out of 373 registered firms, more than 30 times the national share. Both sit inside food manufacturing, an industry built around capital-heavy mills and refineries rather than small workshops. At the opposite extreme, 490 of Thailand's 1,228 five-digit industry codes, 39.9 percent, contain not a single large company. Those zero-large codes cover 80,280 registered firms combined.
Large-company share by five-digit industry code, top 10
- 10722 sugar manufacturing30
- 10420 vegetable and animal oil23
- 22192 other rubber products20
- 10120 poultry meat processing19
- 24204 non-ferrous basic metals18
- 10622 starch products17
- 10212 fish and seafood processing15
- 22111 rubber tyres and tubes14
- 20111 basic chemicals14
- 26103 electronic components14
Figures in percent of firms classified as large.
All ten leading codes sit inside manufacturing, mostly food, rubber, metals and chemicals, industries with heavy fixed capital and export scale.
Top ten industry codes by large-company concentration
| TSIC code | ISIC industry group | Registered firms | Large firms | Large share |
|---|---|---|---|---|
| 10722 | Sugar manufacturing | 169 | 51 | 30.18% |
| 10420 | Vegetable and animal oil manufacturing | 373 | 84 | 22.52% |
| 22192 | Other rubber products | 163 | 33 | 20.25% |
| 10120 | Poultry meat processing | 201 | 38 | 18.91% |
| 24204 | Non-ferrous basic metals | 131 | 24 | 18.32% |
| 10622 | Starch products | 412 | 68 | 16.50% |
| 10212 | Fish and seafood processing | 214 | 32 | 14.95% |
| 22111 | Rubber tyres and tubes | 251 | 36 | 14.34% |
| 20111 | Basic chemicals | 150 | 21 | 14.00% |
| 26103 | Electronic components and boards | 280 | 38 | 13.57% |
Five-digit TSIC codes with at least 100 registered firms, ranked by share classified large, as of 7 Jul 2026.
The codes with no large companies at all
Flip the ranking around and agriculture dominates. Of the 105 crop, livestock, forestry and fishing codes classified under section A, 80 of them, 76.19 percent, report zero large companies. Together those 80 codes hold 7,526 registered firms, 39.07 percent of all 19,259 companies classified anywhere in agriculture. Sixteen of those zero-large codes carry at least 100 registered firms each, a combined 5,689 firms with not one large company among them. Rice growing leads with 983 registered firms and zero large ones. Cattle and buffalo raising follows at 749 firms, then vegetable growing at 519. Marine fishing counts 468 firms, cereal growing other than rice counts 443, and support activities for crop production counts 420, each without a single large company. Manufacturing has its own quiet corner too, with 98 of its five-digit codes carrying zero large firms across 9,608 registered companies. Wholesale and retail trade adds 53 more such codes, covering 8,583 firms. The pattern is consistent across the economy. Processing and manufacturing concentrate large players around capital-heavy plants, while land-based farming and trade stay fragmented among small operators.
Definitions
- TSIC code
- Thailand's five-digit Standard Industrial Classification code, the finest level of industry detail in the DBD registry, aligned digit for digit with the international ISIC system.
- ISIC
- The International Standard Industrial Classification of All Economic Activities, the United Nations classification that Thailand's TSIC system follows.
- Large company
- A registered firm placed in the top of four registry size bands, alongside micro, small and medium, based on the DBD's own classification criteria.
- Concentration
- In this page, the share of a code's registered firms that fall into the large size band, not a measure of market share or revenue control.
- Aggregate
- A statistic computed by summing counts across all firms in a group, rather than averaging each firm's individual figure.
Assumptions
- Only five-digit codes with at least 100 registered firms are ranked in the top-ten concentration table, to avoid small codes where one or two large firms would inflate the share.
- Industry group names for five-digit codes are drawn from the international ISIC Rev 4 classification structure, since the DBD registry does not store a description for this level of detail.
- Large-company status reflects the registry's own size classification at a single point in time and does not track how firms moved between size bands over time.
Methodology
Large company status follows the registry size band assigned to each of Thailand's five-digit TSIC industry codes in the Department of Business Development database, drawn from market_tsic_insight as of 7 July 2026. A registered firm is counted as large if it falls in the top of four size bands, alongside micro, small and medium, based on the registry's own classification criteria. Concentration ranking in the top-ten table and chart is restricted to codes with at least 100 registered firms to avoid small-sample noise, since a code with ten firms and three large ones would otherwise appear more concentrated than it really is. Industry group names for individual five-digit codes are not stored in the database, so this page maps each code to its parent group in the international ISIC Rev 4 classification, which Thailand's TSIC system follows digit for digit, and cites that classification separately.
How we verified this
- National large-company share recomputed as 13876 divided by 1986709 equals 0.698 percent, rounded to 0.7 percent in prose.
- Code 10722 concentration recomputed as 51 divided by 169 equals 30.178 percent, and 30.178 divided by 0.698 equals 43.2, supporting the roughly 43 times figure.
- Code 10420 concentration recomputed as 84 divided by 373 equals 22.520 percent, and 22.520 divided by 0.698 equals 32.3, supporting the more than 30 times figure.
- Zero-large-company codes recomputed as 490 divided by 1228 total five-digit codes equals 39.902 percent, matching the stated 39.9 percent, with firm total summed at 80280.
- Section A zero-large share recomputed as 80 divided by 105 equals 76.190 percent, matching the stated 76.19 percent, and their 7526 firms divided by section A's 19259 total firms equals 39.07 percent.
- The sixteen zero-large agriculture codes with at least 100 firms sum to 5689 registered firms, verified by adding each code's entity count individually.
References
- Department of Business Development. (2026). Registered juristic persons by five-digit industry code and size classification. Ministry of Commerce, Thailand. https://www.dbd.go.th/
- United Nations Statistics Division. (2008). International Standard Industrial Classification of All Economic Activities, Revision 4. https://unstats.un.org/unsd/classifications/Econ/Detail/EN/27/1040
Frequently asked questions
Which five-digit industry code has the most large companies as a share of its firms?
Code 10722, a sugar-manufacturing code, at 30.18 percent large among its 169 registered firms, as of 7 July 2026.
Is it true that vegetable oil manufacturing has an unusually high share of large companies?
Yes. Code 10420, vegetable and animal oil manufacturing, is 22.52 percent large companies, more than 30 times the national rate.
Which industries have no large companies at all?
Rice growing, cattle and buffalo raising, vegetable growing, marine fishing and several other agriculture codes carry hundreds of registered firms each with zero classified as large. Overall 490 of Thailand's 1,228 five-digit codes have zero large companies.
Why do sugar and vegetable oil manufacturing have so many large companies?
Both require large, capital-intensive mills or refineries to process raw crops at scale, which favors a small number of big operators over many small ones, unlike farming, which stays fragmented among many small registered firms.
Cite this page
Chatpong L. (2026). Thai Industry Codes With the Most Large Companies, 2026. Max Data Insights. https://maxdatathailand.com/insights/which-thai-industry-codes-are-heaviest-with-large-companies-2026
Data & corrections
Download the data (CSV)Spot something off, or want to ask about the data? Email insights@maxsolutions.co.th. We publish corrections.
Written by
Chatpong L.Founder, Max Data, Max Solutions Co., Ltd.
Chatpong L. leads Max Data, a company-intelligence platform built on Thailand's official business registry. He writes about the structure of the Thai economy using primary registry data. His work covers company formation, industry concentration, and regional business activity.
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This page reports company-level and aggregate statistics only. It names no individuals and makes no claims about any person. Figures are provided for information and may be revised as source data updates.