DELTA Q3 2026: Inventory Nearly Doubled — Thai Stock Case File #2

Written 3 November 2026 · Thai Stock Case File #2 · case TH-2026-W45-B · based on the company's filings and the Opportunity Day recording as of that date

Delta Electronics (Thailand) (DELTA), the power-electronics maker in Thailand's SET50 index, Q3 2026: one quarter ago the company wrote that its raw-material and inventory pressure was expected to "gradually ease in the coming quarter". That quarter has now been reported. What do the documents say actually eased?

DELTA · FY2026 Q2: "Gross margin was pressured by higher raw material costs, additional inventory provisions, and evolving product mix … The Company has taken proactive measures to strengthen supply chain management and mitigate these challenges, which are expected to gradually ease in the coming quarter."

— MD&A Q2 2026, page 1 · original filing (SEC)

DELTA · FY2026 Q3: "The Company has been proactively implementing measures to manage and mitigate these challenges, which are expected to gradually ease in the following quarter."

— MD&A Q3 2026, page 2 · original filing (SEC)

Almost the same sentence, one quarter later. That alone proves nothing — companies reuse language all the time. So this case file reads everything around it. Every number has a page or a minute; where the documents stop, I say so.

Note: "DELTA" is also the name of a Boom Leverage Terminal subscription plan. That plan has nothing to do with DELTA the stock.

The short version

• Raw materials eased; inventory provisions did not. The company writes both in the same MD&A, and both are true.
• Inventory nearly doubled in nine months — 98.5% higher than at the end of 2025 — while revenue grew 42.4% year on year.
• What is still unknown: the baht amount of this quarter's inventory provision. The MD&A does not give it.

The question

Last quarter DELTA wrote that the pressure would ease in the coming quarter. This quarter, how far do the documents show that it did?

Why now: DELTA filed its Q3 2026 MD&A on 27 October 2026 and presented at the Stock Exchange of Thailand's Opportunity Day — the quarterly session where management answers analysts on the record — on 28 October 2026.

What this file covers, stated up front:

• DELTA's MD&As for Q3 2025, Q1 2026, Q2 2026 and Q3 2026, in English, as filed. All figures in million baht unless stated.
• The auditor's reports (EY Office) for FY2021–FY2025.
• The Q3 2026 Opportunity Day recording. Spoken words are an AI transcript, checked with a second, independent speech model; I quote only passages where both agree.
• Q2 2026 MD&As of three Thai electronics peers — KCE, HANA and CCET — as context, not as a ranking.
• It does not cover share price, valuation or forecasts.

DELTA in 60 seconds

DELTA is the Thai listed company of the Delta Electronics group, a maker of power electronics. The numbers for the quarter, from the table on page 1 of the Q3 2026 MD&A:

The year-ago column in the Q3 2026 MD&A is restated: it shows revenue 53,231 and net profit 7,437, whereas the Q3 2025 MD&A originally reported 53,214 and 7,441. I use the restated figures, because that is what the company now compares against.

Revenue up 42%, net profit up 4%. The gap between those two numbers is the story.

Finding 1 — Margins, inventory and cash

Gross margin, four quarters (MD&A tables, page 1 of each):

Q3 is a little better than Q2, and below both Q3 2025 and Q1 2026.

Net inventory (Highlights on Financial Position, page 2 of each MD&A):

For reference, it was 32,955 at Q3 2025. The company's own explanation (Q3 2026 MD&A, page 3): inventory rose "to cope with an uptrend in sales volume and mitigate supply chain volatility". Trade payables also rose, to 83,574 from 45,230 (+84.8%, page 3) — I show it next to inventory because it is on the same page, not to draw a conclusion from it.

Cash fell to 8,078 from 20,328 (−60.3%). The MD&A gives the reason: "increased cash flow used in investing activities to acquire machinery and proceed the plant construction, together with the cash dividend payout" (pages 2–3).

Two smaller items on the same pages explain part of the operating-margin drop: selling and administrative expenses up 69.4% to 12,846, which includes US export-tariff costs that the company records with an agreement to recover them from customers; and a Pillar Two top-up tax charge of 1,363 in the quarter, with the provision for top-up tax at 7,114 against 3,438.

Finding 2 — Four quarters of inventory language, and five years of the auditor

Read the inventory sentences in order.

DELTA · FY2025 Q3: "enhanced inventory management efficiency, which allowed the Company to reverse a significant amount of inventory provision during the quarter"

— MD&A Q3 2025, page 1 · original filing (SEC)

A year ago, provisions were being reversed. By Q2 2026 the direction had flipped:

DELTA · FY2026 Q2: "Profitability was impacted by shortages of certain raw materials, which constrained production execution and resulted in inventory imbalances"

— MD&A Q2 2026, page 1 · original filing (SEC)

And in Q3 2026 the company writes two things that must be read together. The first is that one half of the problem did ease:

DELTA · FY2026 Q3: "Overall, raw material constraints gradually eased during the quarter."

— MD&A Q3 2026, page 1 · original filing (SEC)

The second is that the other half did not:

DELTA · FY2026 Q3: "Despite the increase in gross profit, gross margin remained under pressure, standing at 27.3% compared with 26.8% in the previous quarter. The recovery was constrained primarily by elevated inventory provisions"

— MD&A Q3 2026, page 2 · original filing (SEC)

Then comes the "expected to gradually ease in the following quarter" sentence quoted at the top. Demand is not the issue, by the company's own account: "the Company continued to have a substantial backlog of orders awaiting delivery, with fulfillment contingent on supply chain conditions" (Q3 2026 MD&A, page 1).

Read it fairly: the company did not write that nothing improved. Raw materials eased, gross margin edged up quarter on quarter and net profit rose 27.7% from Q2. What is still unresolved, in its own words, is the provision on inventory. Both halves belong in any summary of this quarter.

The auditor, five years in a row. In every auditor's report from FY2021 to FY2025, EY Office lists inventory valuation as a key audit matter — "Provision for diminution in value of inventory" (FY2021–FY2023), reworded as "Reduction of inventory cost to net realisable value" (FY2024–FY2025). The FY2025 report explains why:

DELTA · FY2025: "the inventories of the Company are high technology products, which become obsolete faster than some other products. There is a risk with respect to the amount of provision set aside for diminution in the value of inventory."

— Auditor's report FY2025, printed page 3 (key audit matters), referring to Note 9 · opinion: "present fairly, in all material respects" (unqualified) · original filing (SEC, ZIP)

A key audit matter is an area where the auditor had to use significant judgement. It is not a warning and not a qualification — the opinion is clean every year. What it tells you is that inventory valuation was already the judgement-heavy line in DELTA's accounts long before 2026. What is new is the size of the inventory; the FY2026 auditor's report does not exist yet.

Run this against your own book

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100 free credits a day · no card · every result carries the real passage from the Form 56-1 with a link to the source

Finding 3 — Opportunity Day vs the MD&A

These passages from the 28 October 2026 session are from the AI transcript, confirmed by two speech models; the links open the public recording at the minute.

The headline is in US dollars. At 2:15 management summarised "revenue of US dollars 2.281 billion and net profit of 232 million USD", with "net profit grew by 1.3% year over year and 24.8% quarter over quarter". The MD&A says +4.3% in baht. Neither is wrong: the difference is the exchange rate.

Supply improved, but not everywhere. At 3:11: "Delta supply chain conditions improved during this quarter … while supply chain imbalance in certain AI-related components remain a challenge." At 3:27: "the inventory related pressures are expected to gradually improve in the second half of the year". That matches the MD&A.

Why the inventory exists. At 21:21: "part of the reason why we have inventory build up is we acquire material in advance to meet this demand. Some programs suddenly get slowed down a little bit while others get pulled up" — and "right now the material inventory situation is at a high level". At 41:30: "for these inventory, in principle, it's 100% by customer orders … the dynamics will influence how fast this inventory will be used".

How the provision works. At 30:15: for material aged over 90 days "we'll … take a partial reserve for the valuation impairment. But when … production of these products do resume, then we will reverse that", adding that "some of them start going into a little bit of aging situation". At 36:17 the Thai-language interpreter/moderator stressed that this is a provision, not a write-down. Around 32:14 the interpreter summarised, in Thai, that the provision weighs on margin, that customers would bear the cost, and that the provision is expected to clear as the material is used — a summary of meaning, not a quote, because the Thai transcript is unreliable word for word.

What management expects next. At 35:29: "this is going to continuously impact our financial statement in the subsequent quarters" and "right now the provision start to appearing and seems to be quite significant at this moment in time". At 37:25: "for Q4, which we expect to be a sort of peak quarter … I don't expect the inventory level to increase much in terms of the idle inventory" and "our material level will still be high, but the idle or […] inventory dollar amount should remain at this current level or lower".

So the call adds detail the MD&A does not: the 90-day ageing rule, the expectation of reversal, and that the provision will keep affecting results in coming quarters. It does not add the number.

Peers in Q2 2026: is this DELTA's problem or the industry's?

Q2 2026 is the latest quarter with MD&As from all four companies. Their businesses differ — power electronics, printed circuit boards, electronics manufacturing services — so I do not compare margins as a league table. The only question is whether the raw-material pressure was DELTA's alone.

• KCE (printed circuit boards): "the CCL industry experienced significant supply constraints driven primarily by shortages of fiberglass" (p.2); "Strong global demand for AI-related electronic products significantly increased demand for specialized fiberglass" (p.5); "management proactively increased inventory levels, secured committed purchase volumes with suppliers" (p.2); gross margin 18.9%; "the shortage of fiberglass remains a key supply chain risk for the third quarter of 2026" (p.6). MD&A Q2 2026 (SEC)
• HANA (electronics manufacturing): gross margin 10.7% vs 9.4%; "inventory write down provision THB 60.5 million"; "Inventory days were 130 days as at 30th June 2026 and 122 days as at 30th June 2025"; "Hana's production is based on clients' orders" (all p.2). MD&A Q2 2026 (SEC)
• CCET (electronics manufacturing): gross margin 5.30% vs 5.61%, citing "impacts on rising price of raw materials such as memory chips" (p.1). MD&A Q2 2026 (SEC)

All four wrote about raw-material pressure in Q2 2026, and KCE, like DELTA, chose to build inventory. The difference worth noting is disclosure: HANA puts a baht figure on its inventory provision; DELTA's MD&A does not.

What the documents say / what they do not

The documents say:

1. Demand and the order backlog remain high.
2. Raw-material constraints eased during Q3; gross margin recovered slightly quarter on quarter, but is below Q3 2025 and Q1 2026.
3. Inventory nearly doubled in nine months, and inventory provisions are the main drag on margin.
4. Management expects to reverse provisions when the material goes into production and says inventory is "100% by customer orders".
5. The auditor has treated inventory valuation as a key audit matter every year since at least FY2021.

The documents do not say:

1. How much this quarter's provision is in baht. The MD&A names it as the main drag without a number; management called it "quite significant".
2. How much of the inventory customers will actually bear. That was said on the call; there is no figure in any document.
3. Whether a QRTC tax-credit offset will reduce the Pillar Two top-up tax. Asked about it at 32:58, the CFO said the law was not finished and "we still can't see clearly how much [Delta] can compensate or offset".

Where to look next: the Q4 2026 MD&A, the inventory note in the FY2026 financial statements (Note 9 in FY2025) and the FY2026 auditor's key audit matters.

The answer

Did it ease? On raw materials, yes — the company says so. On inventory provisions, not yet — the company says that too, and it has moved "expected to gradually ease" forward by one more quarter. Q4 2026, which management itself calls a peak quarter, is the next checkpoint.

Run it yourself in the Terminal

1. Open the search with this file's query: inventory provisions pressured gross margin, expected to gradually ease in the following quarter.
2. Open DELTA's results and sort by period: Q3 2025 → Q3 2026 is Finding 2.
3. Click a result to open the MD&A with the sentence highlighted; check the page number.
4. Run the same query for KCE, HANA and CCET to see the peer passages.
5. Search management's words from Opportunity Day and open the recording at the minute.

Free to start: sign in with Google, 100 credits a day, no card. The free tier covers roughly the last five quarters, which includes every MD&A in this file; the auditor's-report axis is part of the institutional package.

Traps in reading this set of documents

• Currency. Opportunity Day summaries can be in US dollars. +1.3% (USD) and +4.3% (THB) are the same quarter.
• Restated comparatives. The year-ago column in the current MD&A can differ from what was reported a year ago. Use the restated column and say so.
• Highlights can carry the wrong year. One AI-generated Opportunity Day highlight for this session printed a Buddhist-era year that did not match its own source text (since corrected). Check every year on a highlight card against the source snippet.
• "Key audit matter" is not "the auditor warned". It is an area of judgement in a clean report.
• Provision ≠ write-down. The company was explicit about the word. A provision can be reversed; that is the point of management's argument.

Sources

• DELTA MD&A (English): Q3 2025 p.1 · Q1 2026 p.2 · Q2 2026 p.1–2 · Q3 2026 p.1–3
• Auditor's reports, EY Office (ZIP from the SEC): FY2021 · FY2022 · FY2023 · FY2024 · FY2025 printed p.3
• SET Opportunity Day Q3 2026, 28 October 2026: recording minutes 2:15 · 3:11 · 3:27 · 21:21 · 30:15 · 32:14 · 32:58 · 35:29 · 36:17 · 37:25 · 41:30 (AI transcript, two models)
• Peers, MD&A Q2 2026: KCE p.2, 4–6 · HANA p.2 · CCET p.1

Read on

• Previous case: SCGP Q3 2026 — Indonesia turns a profit; how far do the filings confirm it?
• Auditor report red flags in Thai stocks: 68 modified opinions
• Opportunity Day transcripts: Thai earnings calls, searchable

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Disclaimer: This article summarises what the company's documents say, for education and research. It is not investment advice, has no price target, is not a recommendation to buy or sell, and does not forecast the share price.

Author's holdings: the author does not hold DELTA shares as of 3 November 2026.

Voice and translation: the Thai narration in the video is an AI clone of the creator's voice, made with the voice owner's consent. Opportunity Day remarks are from an AI transcript checked with a second model; Thai-language remarks are summarised, not quoted.