📊 Samsung Electro-Mechanics posts its best-ever Q3; expanding AI substrates is the next challenge - 2026.10.29

Hi, it’s Dotori 🌰 Let’s start with the big picture: Samsung Electro-Mechanics has posted its best-ever results for the third quarter. There’s a trend here that’s too important to dismiss by looking only at the numbers.

The results speak first 📊

Samsung Electro-Mechanics reported consolidated third-quarter revenue of 3,763,300,000,000 KRW and operating profit of 691,000,000,000 KRW ^[1]. Operating profit rose 165.5% from the same period last year ^[1]. Pax Economy TV and the Dong-A Ilbo also reported record quarterly revenue and operating profit ^{[2] [3]}. With multiple outlets reporting the same figures, the core story looks fairly solid. But whether these numbers will carry into the next quarter remains an open question.

The substrate business is expanding 🏭

The most notable change is in substrates. Samsung Electro-Mechanics has decided to make large-scale investments at its Sejong plant in Korea and its Vietnam subsidiary to expand production capacity for FCBGA, a high-value semiconductor substrate used in AI servers ^[4]. The article also mentions the scale of the investment at the Sejong plant, but here let’s focus on the direction rather than the amount. Picture it on a whiteboard: AI chips need substrates to support them, and higher substrate production capacity creates more room to take orders. That’s the key connection. But expanding a factory doesn’t immediately guarantee orders, so we need to look one step further.

The next piece of the puzzle is NVIDIA’s supply chain. As AI demand grows, NVIDIA’s supply chain is expanding, and reports say Samsung Electro-Mechanics will join the production ramp-up alongside Japan’s Ibiden and Taiwan’s Unimicron ^[5]. The company is said to be using spare capacity at its existing production facilities in Korea, with its Sejong and Busan facilities expected to be involved ^[5]. It’s like a relay race, with existing factories being run in a different way to take the baton.

Here’s how the pieces line up 🔗

In Dotori’s view, if we rank the value-chain factors by importance, they line up like this: first, FCBGA substrate expansion; second, joining NVIDIA’s supply chain; third, the trend in AI-related demand. The first most directly changes the production structure, while the third depends most on the direction of demand, so the pace at which each can be confirmed is bound to differ. Yonhap News Economy TV also reported that its video title mentioned expectations for AI-related demand to remain strong in the fourth quarter ^[7]. That was a comment conveyed by the broadcaster, not a plan confirmed by the company.

We should also consider the securities industry’s view. According to an analyst article on the stock, securities firms seem to share a similar outlook, and attention is focused on whether the share-price rebound will continue on the back of a boom in AI components ^[6]. But this is reporting on the securities firms’ perspective, so it shouldn’t be read as a fact stated by the company. The stock closed at ₩1,315,000 on October 28, up +7.26%, and at ₩1,291,000 on October 29, down -1.15%. So the rally on the day the news broke and the pullback the following day are both part of the picture.

Questions that remain open ❓

To sum up, three factors remain to be seen: whether the record third-quarter figures will translate into actual AI-related demand in the fourth quarter, whether investment in substrate expansion will lead to real orders and production utilization, and whether interest from securities firms will align with the stock’s price action. Of these, Dotori thinks substrate expansion is the factor most likely to show up in the numbers first. Let’s pick this up together next time 🌰

📰 Reference News (6)

3

Samsung Electro-Mechanics posts record operating profit of 691 billion in Q3 - Dong-A Ilbo

동아일보 · 2026.10.28

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4

[Four Years of Lee Jae-yong’s Leadership ③] Speeding up the search for future growth engines…accelerating

네이버뉴스 · 2026.10.29

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5

NVIDIA’s supply chain expands amid surging AI demand…Samsung Electro-Mechanics and Amkor join

네이버뉴스 · 2026.10.28

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6

[Stock Analysis] Samsung Electro-Mechanics: doubts amid consensus among securities firms? Can it sustain a long-term rise beyond a brief rally?

네이버뉴스 · 2026.10.29

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📺 Reference Videos (1)

7

YouTube

Samsung Electro-Mechanics posts record quarterly results…“AI-related demand to remain strong in Q4”

▶연합뉴스경제TV·2026.10.28