Capital Markets & EquitiesSilver report

Published April 2026Insight Research13 min read2026 Edition20 sources, 19 primary-gradeVery high source depth

The SET Stock Exchange: Thailand's Equity Market, mai Board, and the Family-Conglomerate Free-Float

Stock Exchange of Thailand (SET) is ASEAN's #2-3 by market cap (~THB 17-19T market cap, ~USD 500B+ FY2024). ~700 listed companies SET, ~200 mai (mai growth-board). NVDR mechanism enables foreign ownership beyond 49% caps. Watchpoints: free-float concentration (CP/Charoen/family-conglomerate dominance), Thai-Chinese-family-cluster, foreign-flow.

Key takeaways

1
SET is ASEAN's #2-3 stock exchange by market cap (~+).
2
~700 SET-listed, ~200 mai (growth-board) listings.
3
NVDR mechanism enables foreign ownership beyond caps.
4
Family-conglomerate concentration: CP, TCC, Central, Boon Rawd, Saha Pathana.
5
Tier-1 SET-listed: PTT, SCC, AOT, ADVANC, GULF, BBL, KBANK, SCB, BDMS, CPALL.
6
Watchpoints: free-float concentration, Thai-Chinese-family-cluster, foreign-flow.

Questions this report answers

How big is SET? Per SET market data and OECD's 2025 Capital Market Review: Stock Exchange of Thailand (SET) is ASEAN's #2-3 stock exchange by market cap after Singapore SGX and Indonesia IDX (~T market cap, ~+ FY2024). ~700 SET-listed companies, ~200 mai (Market for Alternative Investment, growth-board) listings. SET 100, SET 50 indices anchor liquidity. SET Top Ranking shows Delta, PTT, AIS, CPALL, BBL anchoring SET50 concentration.^{[, , ]}

How does NVDR work? Per SET NVDR documentation and operator-side member portal: NVDR (Non-Voting Depositary Receipts) mechanism enables foreign ownership beyond caps via depositary-receipt structure — foreign holder gets economic exposure (dividends, capital gains) without voting rights, allowing structural workaround for FBA-restricted-sector listed firms. ~ of SET-listed firms have NVDR-eligible underlyings; NVDR accounts for ~ of total SET market value and ~ of foreign trading. FTSE Russell's January 2026 ground rules formalise treatment in global indexes.^{[, , ]}

What's the family-conglomerate concentration? Per Bangkok Post / Forbes and OECD ownership-concentration analysis: CP Group (Charoen-Pokphand-Chearavanont, ~ SET market cap via CPALL, CPF, CPN, Makro), TCC (Charoen-Sirivadhanabhakdi, ThaiBev, BJC, Asset World), CG (Central Group Chirathivat-family, CRC, CPN), Boon Rawd (Singha Bhirombhakdi-family private), Saha Pathana (Saha Group Chokwatana-family). Watchpoints: free-float-concentration risk, foreign-flow trajectory, MSCI Thailand weight, ASEAN-trading-link integration.^{[, , ]}

Public-record references

Data as of: 2025-2030 horizon

Executive summary

SET ASEAN's #2-3 by market cap (~+) per SET market data and OECD's 2025 review. ~700 SET-listed, ~200 mai listings. mai pipeline filings tracked on the SET listing application status board point to an active 2026-2027 IPO window dominated by digital-banking, sustainable-energy, and tech-enabled-services sub-sectors.^{[, , ]}

NVDR mechanism enables foreign ownership beyond caps. Family-conglomerate concentration: CP, TCC, Central, Boon Rawd, Saha Pathana. OECD's foreign-ownership-restrictions chapter signposts reform options for the Foreign Business Act cap currently under consultation through Q3 2026.^{[, , ]}

Tier-1 SET-listed: PTT, SCC, AOT, ADVANC, GULF, BBL, KBANK, SCB, BDMS, CPALL per the SET Top Ranking screen. Foreign-investor net flow (tracked on SET monthly investor-type statistics) plus PDMO's government-bond auction calendar together drive equity-bond rotation watchpoints through 2025-2027.^{[, , ]}

Public-record references

Data as of: 2025-2030 horizon

Stock Exchange of Thailand SET structure

Market cap

Value

~USD 500B+

Notes

FY2024.

ASEAN rank

Value

#2-3

Notes

After Singapore, Indonesia.

SET-listed companies

Value

~700

Notes

Main board.

mai growth-board

Value

~200 listings

Notes

Alternative Investment.

NVDR mechanism

Value

Foreign-ownership workaround

Notes

Beyond 49% caps.

Family-conglomerate

Value

CP, TCC, Central, Boon Rawd, Saha

Notes

Concentration risk.

Metric	Value	Notes
Market cap	~USD 500B+	FY2024.
ASEAN rank	#2-3	After Singapore, Indonesia.
SET-listed companies	~700	Main board.
mai growth-board	~200 listings	Alternative Investment.
NVDR mechanism	Foreign-ownership workaround	Beyond 49% caps.
Family-conglomerate	CP, TCC, Central, Boon Rawd, Saha	Concentration risk.

Public-record references

Data as of: 2024-2026

Analyst framing

Why this report matters

SET ASEAN's #2-3 stock exchange (~USD 500B+ market cap). ~700 SET-listed, ~200 mai. NVDR mechanism enables foreign ownership beyond 49% caps. Family-conglomerate concentration: CP, TCC, Central, Boon Rawd, Saha Pathana.

Digital-banking IPO pipeline (2026-2027)

Bank of Thailand's virtual-bank licensing framework selected three consortia in mid-2025: an SCB X-led consortium with KakaoBank and Wechat-affiliated technology partners, a KASIKORN-led consortium with Carabao, PTT OR and other partners, and a Krungthai-AIS Gulf Energy-PTT OR consortium. Operational start is targeted for 2026 with at least one virtual bank expected to file for either a holding-company spin-out IPO or a tracking-stock structure on SET by 2027.

Bitkub Capital Group Holdings — the parent of Thailand's largest licensed digital-asset exchange — has signposted a 2026-2027 SET main-board listing target after pre-IPO funding rounds completed under the SEC digital-asset licensing perimeter. The IPO sequencing alongside KASIKORN virtual-bank and SCB X virtual-bank is the most important new-listing catalyst for SET deal-flow since the Gulf Energy Development listing in 2017.

Combined free-float from virtual-bank holdco spin-outs, Bitkub Capital, and follow-on conglomerate placements could add THB 150-250B (USD 4-7B) of fresh primary issuance through 2027 on management estimates; this would lift mai-board and main-board annual IPO volume to its highest level since 2018. The SET listing-application status board offers near-real-time pipeline visibility.

ESG framework, sustainability rating, and climate-risk disclosure

SEC Thailand's ESG-fund disclosure framework, anchored by the Thai ESGX (Thailand ESG Extra) regulatory wrapper introduced in late 2024 and progressively tightened through 2025-2026, will require asset managers to publish standardised holdings-level ESG metrics and impact attribution at fund-report level by Q3 2026. The combined effect is to reset minimum disclosure for the THB 1.5-2T mutual-fund-and-PVD universe that anchors retail equity flows.

SET's existing SETESG ratings and Thailand Sustainability Investment (THSI) universe transition into an ESG100 series by Q1 2027 with a parallel climate-risk disclosure framework aligning to ISSB / TCFD anchoring for SET100 constituents. The SET Sustainability portal documents the SET ESG rating methodology and rolling THSI list that grandfathers existing AA/AAA-rated names into the ESG100.

Underpinning the disclosure ladder is the Thailand Taxonomy phase 1 (energy and transport), published in mid-2023 by the BoT-led Sustainable Finance Working Group with SEC, FPO and SET; phase 2 expansion into industrials, agriculture, and real estate runs through Q1 2026, providing the technical screening criteria SET-listed corporates will reference when raising green-labelled debt or filing transition plans.

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