What Thai SET-Listed Companies Must Publish on Their IR Website

A SET-listed company's investor relations site sits in an unusual position: it's a corporate website, but it's also the public-facing home for disclosure obligations that don't apply to an ordinary business site at all. Getting the content structure right matters more here than almost any other site category we build, because the audience includes analysts, institutional investors and regulators reading it as a reference document, not just prospective customers browsing.

The 56-1 One Report is the single most-requested document

Since 2021, Thai listed companies file a unified annual disclosure — the 56-1 One Report — that replaced the old separate Form 56-1 and annual report. It's consistently the single most-requested document on an IR site, which makes it worth a clear, permanent, easy-to-find home rather than being buried in a general news or announcement archive where a visitor has to guess which year's post it lives under.

Financial statements need structure, not just uploads

Quarterly and annual financial statements need to be organised by period in a way a visitor — or an analyst's script pulling data on a schedule — can navigate predictably, not dropped into a flat, undated list of PDFs. A consistent URL and file-naming pattern across years matters more than it sounds, both for human visitors trying to find last year's Q3 report and for anyone building a tool that expects a predictable structure.

Disclosure and news need a genuine live feed

SET disclosure requirements mean material company news — earnings, major transactions, board decisions — needs to reach the public promptly, and an IR site's disclosure feed is where a lot of that traffic actually lands first, often before a general press release circulates elsewhere. This is one of the clearer cases where the site itself needs to function as close to real-time infrastructure rather than a page that gets updated whenever someone remembers to.

An IR calendar sets analyst expectations before they have to ask

A clear calendar — upcoming earnings call dates, the AGM date, the quarterly filing schedule — lets analysts and investors plan around a company's disclosure rhythm instead of checking back repeatedly to see if something's been posted. Companies that skip this tend to field the same "when's the next earnings call" question repeatedly through investor relations contact channels that could have been answered by a page that's already there. It's a small section with a disproportionate effect on how much manual back-and-forth the IR team ends up handling.

Shareholder structure belongs in a clear, current section

Major shareholder lists, shareholding structure and any changes in significant holdings are standard diligence-checklist items for an institutional investor, and a section that's current and clearly dated saves exactly the kind of back-and-forth email that a well-organised IR site is meant to prevent. A shareholder structure page that hasn't been updated in over a year reads, correctly, as a site nobody is actively maintaining.

ESG and sustainability reporting is no longer optional in practice

Institutional investors increasingly screen on ESG factors as standard practice, and a sustainability report or ESG disclosure section — even a modest one for a smaller listed company — is now commonly expected rather than a nice-to-have. This doesn't need to be a separate site or a enormous undertaking; it needs a clear, findable section that's kept current, structured the same way the financial disclosures are.

Shareholder meeting materials and corporate governance documentation

AGM notices, meeting materials and minutes need their own clear section, published on the timeline SET disclosure rules require rather than whenever it's convenient to update the site. Corporate governance documentation — CG guidelines, code of conduct, risk management framework, anti-corruption and whistleblowing policies — belongs in a permanent, well-organised library too; this is exactly the kind of content that gets requested by an institutional investor doing diligence and reflects badly on the company when it's hard to find.

Bilingual content isn't optional for most listed companies

A meaningful share of institutional investors reading a Thai listed company's IR site are reading the English version, which means Thai and English need to be built together from the start rather than English being a delayed afterthought translation. Content that exists only in Thai for months after publication is a real gap for exactly the audience an IR site exists to serve.

Speed and mobile access matter more here than they seem to

An analyst checking a disclosure or downloading a financial statement PDF between meetings, often on a phone, doesn't have patience for a slow, heavy IR site — and unlike a marketing site where a slow load costs a conversion, a slow IR site costs credibility with exactly the audience most qualified to judge a company's operational competence by extension. This is one more reason to build an IR site properly rather than treating it as a lower-priority corner of the main website.

What an IR site doesn't need to be

An IR website doesn't need to handle SET disclosure filing itself — that goes through the company's own IR officer or compliance advisor via SET's own systems — or run AGM e-voting technology, which is a specialised regulated service some providers focus on separately. What the site needs to do is give whatever gets filed and voted on a clean, findable, professionally presented home, and make it easy for anyone updating content — a new quarterly filing, a press release — to do so without needing a developer involved every time.

Getting the structure right from the start

1. Give the 56-1 One Report its own permanent, prominent section, not a line item in a general document archive.
2. Structure financial statements by period with a consistent, predictable URL and naming pattern across years.
3. Build a genuine live disclosure feed, not a manually updated news page that lags behind actual filings.
4. Publish an IR calendar covering earnings calls, the AGM and the filing schedule, so investors aren't asking what could already be published.
5. Keep shareholder structure current, dated, and easy to find.
6. Give ESG and sustainability disclosure its own proper section, not an afterthought.
7. Create a permanent corporate governance document library — guidelines, code of conduct, risk management, anti-corruption policy — rather than scattering it across old announcements.
8. Build Thai and English together from day one, not as a translation project that happens after launch.
9. Make the site fast and genuinely usable on mobile, since that's how a meaningful share of analysts actually check it between meetings.
10. Make the site CMS-driven so IR staff can publish routine updates without a developer on standby for every filing.

Done right, an IR site becomes infrastructure the company's own IR team runs independently — not a page that quietly falls behind the filing schedule it exists to support.