Why is LG Innotek stock plunging today?

LG Innotek shares plunged nearly 15% to KRW 487,000 after a Nikkei report that Apple asked suppliers to cut orders for the iPhone 18 Pro amid sluggish demand. Apple accounted for nearly 78% of LG Innotek revenue in the first half of 2026, creating a substantial earnings headwind; South Korea’s KOSPI also fell sharply, led by losses in chip and technology stocks.

Analysis

The key asymmetry is not simply Apple demand weakness: LG Innotek’s reported 78% revenue exposure makes any iPhone order reset unusually consequential, while the impact on Apple is diluted across its broader business. But revenue concentration is not profit concentration; without product-level margins, shipment timing, and inventory data, the earnings hit cannot be inferred directly from the headline. A supplier order cut could reflect inventory correction or model-specific mix rather than a durable decline in end demand.

Near term, the sharp share-price reaction raises the risk of estimate cuts and further volatility, especially if channel checks show cancellations extending beyond the Pro line. Over the next 1–3 months, monitor LG Innotek guidance, camera-module and substrate utilization, and Apple’s disclosures or supplier commentary for evidence of a broader build-plan reduction. Over 6–18 months, sustained weakness could accelerate customer diversification and intensify competition among component suppliers; that may support alternative suppliers, but qualification cycles limit immediate substitution.

Contrarian angle: the revenue concentration makes the exposure look severe, but the market may be extrapolating one reported order adjustment into a structural demand reset. Conversely, a product-specific explanation is not reassuring unless subsequent orders and inventory data confirm it. No valuation or earnings estimates are provided, so the selloff alone is not a basis to call a bottom.

Key Decisions for Investors

• Do not buy the post-drop dip in LG Innotek until order trends and earnings guidance clarify whether cuts are limited to one model or extend across the iPhone program.
• For existing exposure, consider reducing or hedging LG Innotek risk rather than treating the reported 78% revenue concentration as a precise earnings sensitivity; verify product-level margins and inventory exposure first.
• Watch Apple (AAPL) for confirmation, not as a direct hedge: broader-business diversification makes its exposure asymmetric, but a sustained iPhone build-plan reduction could still weigh on sentiment and estimates.
• Reassess the bearish thesis if supplier checks or company guidance indicate stable subsequent orders and no material utilization or estimate deterioration; strengthen it if cuts broaden beyond the Pro line or guidance is reduced.