LG Innotek fell 16% in a day as profit forecasts collapsed; its AI parts rescue starts in 2027

A 16 percent day, and the forecasts behind it

LG Innotek▲+1.37% — LG Innotek, up 1.37 percent today, the LG group parts maker whose camera modules go into Apple's▲+1.22% — Apple, up 1.22 percent today iPhones, closed down 16.17% at 479,500 won on October 12, 2026, its first finish below 500,000 won since late July ¹. Yuanta Securities had cut its third-quarter operating profit forecast to 78.7 billion won from 320 billion won↗, and the broker consensus tracked by market tracker FnGuide fell 32.8% in a month, to 202.9 billion won ¹².

Two forces did the cutting. The won strengthened from an average 1,502 per dollar in the second quarter to 1,418 in the third, so modules built from materials bought at the weaker rate shipped into the stronger one ¹. Apple also asked suppliers to cut October orders for iPhone 18 Pro components by at least 15%↗ after memory-chip costs forced price increases ⁷. Optical solutions, the camera-module segment, was 82% of first-half revenue ¹.

The pivot is dated 2027 and 2028

Chief executive Moon Hyuk-soo put dates on the escape at the Korea Electronics Show on October 13↗ ³. Long-term supply agreements with big tech are still in negotiation, he said, with customers that are "companies everyone knows" ³⁸. The FC-BGA business, high-density substrates that connect chips to circuit boards in AI servers, improves from 2027, and glass substrates, a next-generation packaging material, reach supply around 2028 from a pilot line in Gumi ³⁸. His own caution runs further: "meaningful numbers" for glass arrive only after 2028 ⁸.

One data centre takes 170,000 of the boards

The substrate division earned 99.6 billion won on 935.6 billion won of first-half sales, and KB Securities projects FC-BGA revenue rising from 140 billion won this year to 2 trillion won by 2030↗ ⁸. The demand is concrete: one data center takes roughly 170,000 of the boards by industry estimate↗, and LG Innotek's own photos show an AI accelerator substrate at six times the size of a PC one ⁵⁸.

The rival is already being paid

Samsung Electro-Mechanics▲+2.15% — Samsung Electro-Mechanics, up 2.15 percent today, the Samsung group parts maker whose sales are spread across capacitors, substrates and optics, collects on the same trade today. Its third-quarter consensus rose 6.2% to 642.3 billion won in the very month LG Innotek's fell ².

It has also disclosed six long-term AI-component agreements this year, worth about 3.9 trillion won↗ across AI-server MLCCs, silicon capacitors and inductors ²⁹. The October 16 rally in Korean substrate stocks rode Hana Securities' call for further price increases into early 2027 ⁶. Hana's own dating of the shortage tempers it: new Korean capacity is fully reflected only after the second half of 2027 ⁶.

Timing bulls against a dated payoff

The bulls call the damage currency timing rather than demand. Mirae Asset raised its LG Innotek target to 1,100,000 won from 950,000 won, citing unchanged shipment volumes and new-product demand ¹. DB Financial Investment expects a re-rating from next year as package solutions grows ¹. Even Kiwoom Securities' 91.7 billion won forecast puts the exchange rate first ².

For a holder, the split is a matter of dates. Samsung Electro-Mechanics is being paid for AI parts this quarter, in a rising consensus and signed contracts ²⁹. LG Innotek's substrate revenue is dated 2027 and 2028, and its camera business carries the stock until then ³. LG Electronics has already shown the weakness through: 781.8 billion won of third-quarter operating profit, with the subsidiary dragging ¹. One parts maker is being paid this quarter; the other is waiting on a calendar.