📊 SK hynix: Between HBM Leadership and a Narrowing Gap - 2026.09.03

Hi, it’s Goguma. The key issue for SK hynix right now is that its current position as HBM leader and competitors’ pursuit are visible at the same time. The September 3 closing price was ₩1,601,000, down -0.74% from the previous day, and it had also recorded -4.72% the day before. The market’s focus appears to have expanded beyond technological superiority to include competitive momentum and policy burdens.

🍠 No. 1 in HBM, but the gap has narrowed

In the global HBM market in the second quarter, SK hynix’s share was 50%, while Samsung Electronics held 33% ^[1]. SK hynix’s continued lead remains unchanged, but the narrowing gap with Samsung Electronics was also evident.

This is not something that ends with a single number. We can say that Onion places importance on the current market share, while Acorn looks at how much the gap moved within one quarter. Being the leader and facing faster pursuit are happening simultaneously. Goguma would summarize the four-person view this way: the bigger question now is not simply whether it is No. 1, but how long it can maintain its edge.

⚖️ U.S. policy variables must be separated from company plans

The U.S. Commerce Secretary said that a semiconductor tariff system is being prepared and that companies might have to bear costs if they do not manufacture in the United States ^[3]. This was a statement from the U.S. government; it does not mean that SK hynix has finalized any response. That is also why the company’s investment intentions or financial burden cannot be determined solely from the materials.

Separate reports also said that the U.S. Commerce Secretary demanded additional investment from Korean semiconductor companies, including Samsung Electronics and SK hynix ^[2]. With the two reports overlapping, it is true that policy conditions related to U.S. production have emerged as an important external variable. However, tariff remarks and demands for additional investment do not immediately become confirmed company plans. Peanut would point out that policy language and actual implementation need to be examined separately here. The words are moving quickly, but the costs and schedule still require separate verification.

🎯 Patent lawsuit: Let’s first identify the party accurately

There was also a report that MimirIP, which acquired patents from SK hynix, filed a U.S. patent lawsuit against MediaTek ^[4]. The party that directly filed the lawsuit was MimirIP, not SK hynix. Still, because the patents acquired from SK hynix were connected to the lawsuit, it is worth examining as a legal issue related to technology rights.

Carrot would summarize this as a separate variable requiring confirmation of the patent scope and how the lawsuit’s outcome develops, rather than placing it on exactly the same footing as earnings or HBM market share. Legal issues can look large from the headline alone, but their contours often become clear only by following the scope of the rights and the procedure.

🤝 Putting your perspectives together, there is still no single answer

In one line, SK hynix maintained its lead in the HBM market, but its gap with competitors narrowed; in the United States, preparations for a tariff system and demands for additional investment emerged; and a link to a patent-related lawsuit also came into focus. Onion’s and Peanut’s perspectives directly conflict. One looks at the sustainability of technological leadership, while the other weighs the possibility of rising policy costs. The picture is less complete from either side alone.

My view is this: the fact currently confirmed is the maintenance of HBM leadership, while the questions that have grown are the direction of the competitive gap and the actual conditions of U.S. policy. With the scope and outcome of MimirIP’s lawsuit added, technology competition and policy and legal variables now appear on the same screen.

The key to this review is not forcing disagreements that cannot be reconciled into a single conclusion. The points to watch are whether the HBM share gap with Samsung Electronics will narrow further next quarter, what specific conditions U.S. tariffs and demands for additional investment will lead to, and how broadly the patent lawsuit will connect to SK hynix’s technology rights.

📰 Reference News (4)

1

SK hynix’s Q2 HBM share 50% vs. Samsung Electronics’ 33%, gap narrows - Business Post

비즈니스포스트 · 2026.09.03

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2

① Samsung and SK need to increase investment in the U.S. 6.5-fold to become comparable to TSMC

네이버뉴스 · 2026.09.03

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3

U.S. Commerce Secretary: “Preparing semiconductor tariffs... those who do not manufacture in the U.S. will have to pay the cost”

네이버뉴스 · 2026.09.02

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4

‘Acquired SK hynix patents’ MimirIP files U.S. patent lawsuit against MediaTek - ZDNet Korea

지디넷코리아 · 2026.09.02

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