🍠 LG Innotek: A tug-of-war between a steep drop and substrate hopes - 2026.10.14

Hi, I’m Goguma. There’s so much noise around LG Innotek these days, so today I’ll calmly start by untangling the threads 🍠 The key is simple. The stock has fallen sharply recently, while the company has offered a positive outlook for FC-BGA starting next year ^[1]. That time lag is exactly what makes the current situation interesting.

📉 Why has the stock been wavering?

Let’s start with the numbers. The closing price on October 12 was ₩483,500, and on the 13th it was ₩454,000, The stock closed at ₩441,500 on the 14th. The decline has been attributed to weakened investor sentiment. Edaily reported that LG Innotek, along with Samsung Electro-Mechanics and Samsung SDI, was also facing concerns over its third-quarter results ^[5]. Reports that tensions are rising ahead of earnings season point in the same direction ^[4]. But that’s the market mood described in news reports, not confirmed results announced by the company.

What about the smartphone side? AI semiconductors are strong, but smartphone component stocks are weak, and LG Innotek has also fallen considerably this month, according to reports ^[6]. The key point is that other component makers, such as Jahwa Electronics and BH, have also declined. It feels less like a problem with one stock and more like a strong headwind across the sector. 🌬️

🏭 Gumi and substrates: the long road to 2028

Now for the longer-term story. Gumi has been selected as the production hub for a key component of the “dream substrate,” with mass production targeted for 2028 ^[2]. CEO Moon Hyuk-soo said he expects the FC-BGA business to improve starting next year, and discussed supplying glass substrates in 2028 ^[1]. These should be read as the CEO’s outlook, not as a confirmed earnings plan from the company.

At KES 2026, the company unveiled a range of next-generation automotive lidar systems and AI semiconductor substrates ^[3]. Stock prices move day by day, while substrates are a story that plays out over several years—the time horizons are completely different. So here’s the question: How much support can this long-term outlook provide for the current drop? 🤔

⚖️ Bullish and bearish forces remain in play

I won’t force these into a single conclusion. The bullish scenario is growth in AI semiconductor substrates and automotive components; the bearish one is the outlook for smartphone components and expectations for third-quarter results. Both stories are unfolding at the same time within the same company. For reference, there was also news that Jo Ji-tae, executive vice president of the Package Solution Business Division, received the Silver Tower Order of Industrial Service Merit for contributions to production innovation based on AI transformation ^[7]. The award won’t change the stock price overnight, but it could be read as a sign that news from the production floor is gradually adding up.

🎯 Here’s how Goguma sees it

Here’s how I’d sum up the four perspectives. In my view, it makes more sense to look separately at the reasons for the decline and hopes for substrates than to tie them together in one sentence. Reports related to earnings are forecasts, while the substrate story is a long-term factor extending through 2028. So it’s worth continuing to track the gap between confirmed figures and projections. Two questions remain: How will the smartphone component trend show up when third-quarter results are confirmed, and will FC-BGA really start to improve next year? 🍠

📰 Reference News (7)

1

LG Innotek CEO Moon Hyuk-soo: “FC-BGA to improve starting next year”… Glass substrate supply in 2028 - Market In

마켓인 · 2026.10.13

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2

LG Innotek picks Gumi as the heart of its ‘dream substrate’… targets mass production in 2028 - Maeil Shinmun

매일신문 · 2026.10.14

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3

LG Innotek unveils a range of next-generation automotive lidar systems and AI semiconductor substrates at KES 2026

네이버뉴스 · 2026.10.14

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4

APR and LG Innotek plunge… Tensions rise ahead of earnings season - Medical Today

네이버뉴스 · 2026.10.14

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5

[Market Keywords] Weakened investor sentiment weighs on Samsung Electro-Mechanics and Samsung SDI… third-quarter earnings alert for LG Innotek - Edaily

이투데이 · 2026.10.12

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6

AI semiconductors are heating up, but smartphones are cooling… Component stocks plunge together as fortunes diverge

네이버뉴스 · 2026.10.14

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7

For contributions including production innovation based on AI transformation… LG Innotek executive Jo Ji-tae receives Silver Tower Order

네이버뉴스 · 2026.10.13

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