10 min read
Samsung vs SK Hynix in 1 line: Samsung sells phones, TVs and chips; SK Hynix sells memory. That one difference explains most of what you see in their results, their share prices and the AI headlines. Samsung Electronics is a giant with several unrelated businesses under one roof, while SK Hynix is close to a pure bet on memory chips, including the high-bandwidth memory that sits next to AI processors.
Key takeaways
- Samsung Electronics runs 2 big divisions: Device Solutions (memory, chip design, foundry) and Device eXperience (Galaxy phones, TVs, appliances).
- SK Hynix makes almost only memory: DRAM, HBM for AI accelerators, and NAND flash (partly through its US unit Solidigm).
- Both trade on the Korea Exchange’s KOSPI board: Samsung as 005930, SK Hynix as 000660, priced in Korean won.
- On November 10, 2026, Samsung was up 4.21% and SK Hynix up 5.55% on the day but both were still down more than 20% over one month, per Yahoo Finance data.
Samsung vs SK Hynix: the 5 differences at a glance
If you only have a minute, this table is the comparison. Everything below explains one row in more detail.
| Difference | Samsung Electronics | SK Hynix |
|---|---|---|
| 1. What it sells | Memory, chip design (Exynos, image sensors), contract chipmaking, Galaxy phones, TVs, appliances, Harman audio | Memory: DRAM, HBM, NAND flash and SSDs |
| 2. AI exposure | Through memory (including HBM) and foundry, diluted by consumer devices | Direct: HBM is a flagship product for AI accelerators |
| 3. Business cycle | Memory cycle plus smartphone and TV demand | Almost entirely the memory price cycle |
| 4. Group and control | Flagship of the Samsung Group, held through Samsung affiliates and the Lee family | Part of SK Group; largest shareholder is holding company SK Square |
| 5. Shares | KOSPI 005930 (common), 005935 (preferred), GDRs in London | KOSPI 000660; check your broker for any US-traded ADR line |
What does Samsung Electronics actually make?
Samsung Electronics is the flagship of the Samsung Group, one of Korea’s chaebol (family-led business conglomerates). It reports its business in two main halves, and they behave very differently.
Memory chips
Samsung has been the world’s biggest memory maker for most of the past three decades. Its fabs in Giheung, Hwaseong and Pyeongtaek, south of Seoul, turn out DRAM (the working memory in phones, PCs and servers) and NAND flash (the storage inside SSDs and phones). It also makes HBM, but it has spent much of the AI boom trying to close the gap with SK Hynix in that product.
Foundry and System LSI
Foundry means making chips that other companies design, the business TSMC of Taiwan dominates. Samsung is one of very few firms able to make leading-edge logic chips, and it is building a fab in Taylor, Texas. A separate unit, System LSI, designs Samsung’s own chips such as Exynos phone processors and image sensors. Both units have been harder to make profitable than memory, which is why investors watch them closely.
Phones, TVs and appliances
The Device eXperience side sells Galaxy S and Galaxy Z Fold and Flip phones, tablets, wearables, TVs, fridges and washing machines. Samsung also owns Harman, the audio and car electronics group, and controls Samsung Display, which makes OLED panels. This side gives Samsung steadier revenue, but it also means a strong memory quarter can be partly offset by weak phone or TV demand.
What does SK Hynix make, and why is it mostly memory?
SK Hynix started life as the chip arm of Hyundai Electronics, became the independent company Hynix after Korea’s 1990s financial crisis, and was bought by SK Group (the conglomerate behind SK Telecom) in 2012. Since then it has stayed focused on one thing: memory.
- DRAM: its largest business, sold to server, PC and smartphone makers.
- HBM: high-bandwidth memory, stacked DRAM packaged next to AI processors.
- NAND flash and SSDs: boosted by its purchase of Intel’s NAND business, now run as the US-based subsidiary Solidigm.
Its main fabs sit in Icheon and Cheongju in Korea, with a large new cluster planned in Yongin. Because it has no phones, TVs or big foundry business, SK Hynix’s results rise and fall almost entirely with memory demand and memory prices. For an investor or a curious reader, that makes it easier to read: if memory is booming, SK Hynix usually shows it first and most clearly.
Why HBM made SK Hynix the AI memory name
AI chips like Nvidia’s GPUs need to move huge amounts of data every second. Normal DRAM sits too far away and moves too slowly. HBM solves this by stacking several DRAM dies on top of each other, wiring them together with tiny vertical connections (through-silicon vias) and placing the stack right beside the processor in the same package.
SK Hynix moved early. It was the first to mass-produce the HBM3 generation and became a leading HBM supplier for Nvidia’s AI accelerators, which turned a commodity memory maker into one of the most watched AI stocks in Asia. Samsung, the bigger company, has had to fight to qualify newer HBM generations with the largest AI customers.
The payoff shows in recent news. The Wall Street Journal reported that SK Hynix plans $75 billion in shareholder returns after blockbuster earnings. Check SK Hynix’s own investor relations page for the official terms and timing of any program.
The flip side of being the AI memory name is concentration. When AI chip demand looks shaky, SK Hynix tends to fall harder. The Hankyoreh, a Korean daily, asked in its English edition whether a scandal at Nvidia could rattle Korea’s semiconductor industry, which shows how closely Korean chip stocks are tied to their biggest customer.
Memory vs foundry vs phones: how each business makes money
The three businesses run on different clocks, and knowing which clock matters tells you how to read each company’s earnings.
| Business | How it earns | What drives it | Who has more exposure |
|---|---|---|---|
| Memory (DRAM, NAND) | Sells standardized chips in huge volumes | Supply and demand; prices can swing sharply up and down | SK Hynix (almost all), Samsung (large share) |
| HBM | Premium memory made with specific customers | AI accelerator orders and qualification with chip designers | SK Hynix leads; Samsung is pushing to catch up |
| Foundry | Manufactures chips designed by others | Winning customers at advanced process nodes; very high capital spending | Samsung only |
| Phones and devices | Sells finished products to consumers | Launch cycles (Galaxy S early in the year, foldables mid-year), consumer spending | Samsung only |
Memory is the most cyclical. When chipmakers build too much capacity, prices fall and profits can vanish within a few quarters. When demand outruns supply, as it has with AI servers, profits jump. That is why SK Hynix’s share price can look calm for a year and then double or halve. Samsung’s devices business smooths the ride, which some investors prefer and others see as a drag on its AI story.
Who controls Samsung Electronics and SK Hynix?
Both are run within chaebol groups, but the control structures differ.
Samsung Electronics is held through a web of Samsung affiliates, including Samsung Life Insurance and Samsung C&T, along with members of the founding Lee family. Lee Jae-yong (often called Jay Y. Lee) is the chairman. Foreign institutions and Korean retail investors own large slices of the free float, and Samsung is one of the most widely held stocks among Korean households.
SK Hynix is controlled by SK Square, a holding company spun off from SK Telecom in 2021, which sits within SK Group, chaired by Chey Tae-won. Because SK Square’s value depends heavily on its SK Hynix stake, some investors treat SK Square as an indirect way to follow SK Hynix.
For outside shareholders, group structure matters mainly for capital decisions: dividends, buybacks and big investments. Korea has spent recent years pushing listed companies to improve shareholder returns, often called the Corporate Value-up program, so return announcements from both firms get close attention.
How Samsung and SK Hynix shares are listed and traded
Both companies’ main listings are on the KOSPI, the main board of the Korea Exchange (KRX), which is Korea’s equivalent of the NYSE. Regular trading runs from 9 a.m. to 3:30 p.m. Korea time, and prices are quoted in won.
Tickers you will see
- Samsung Electronics common: 005930 (005930.KS on Yahoo Finance).
- Samsung Electronics preferred: 005935. Preferred shares usually carry a slightly higher dividend and no voting rights, and often trade at a discount.
- Samsung GDRs: global depositary receipts traded in London, mostly used by institutions.
- SK Hynix: 000660 (000660.KS). A Stocktwits page lists an SK Hynix ADR under the ticker SKHY; confirm with your broker exactly what that line is and where it trades before relying on it.
Rules that surprise foreign readers
Korean stocks have a daily price limit: a single share cannot move more than 30% up or down from the previous close in one session. Korea also scrapped its old foreign investor registration requirement in late 2023, although most retail investors abroad still reach the market through a broker that offers Korean access, or through funds.
Ways people abroad get exposure
- A broker with direct KRX access, buying the local shares in won.
- Country funds and ETFs that track Korea, where Samsung and SK Hynix are usually the largest holdings. Check the fund issuer’s page for current weights.
- Global semiconductor funds, which may hold one or both alongside Nvidia, TSMC and others.
What moved Samsung and SK Hynix shares in November 2026
The latest data shows how tightly the two stocks move with global tech. Around midday on November 10, 2026, Yahoo Finance data had Samsung Electronics up 4.21% at 197,900 won and SK Hynix up 5.55% at 1,199,000 won. The KOSPI index was up 3.59% at 5,199.21.
That bounce came after a rough month. Over one month, Samsung was down 21.0%, SK Hynix down 25.3% and the KOSPI down 18.56%. The US-listed Philadelphia Semiconductor Index (SOX) rose 6.85% on November 9, and CNBC reported Asian tech stocks tracking a Wall Street rebound. KED Global described Korean stocks rebounding with the chip giants leading the recovery.
The pattern fits the comparison above: SK Hynix, the purer AI memory play, fell more over the month and rose more on the rebound. Samsung moved in the same direction with a smaller swing. Because the two together make up a very large share of the KOSPI, their moves often decide the direction of the whole index.
This article explains how the companies differ and what moved their shares. It is not investment advice.
How foreigners can follow Samsung and SK Hynix
You don’t need to read Korean to track either company well. These sources cover most of what matters.
- Investor relations pages. Both companies publish English earnings releases, presentation slides and conference call recordings on their official IR sites.
- Earnings timing. Samsung usually publishes preliminary quarterly guidance (headline revenue and operating profit only) in the first days after a quarter ends, then full results later in the month. SK Hynix reports full results in the second half of the month. Check each IR calendar for exact dates.
- DART. Korea’s official corporate filing system, run by the Financial Supervisory Service, has an English portal where formal disclosures appear.
- The SOX index and Nvidia results. US chip stocks trade overnight in Korea time, so a big move in the SOX often sets the tone for Seoul the next morning.
- USD/KRW. The won was at 1,344.39 per dollar on November 10, 2026, per Yahoo Finance. A weaker won tends to help exporters’ reported earnings and changes the dollar value of your holding.
- English-language Korean business media. KED Global, The Elec and the English editions of Korean dailies cover supply chain and HBM news quickly.
FAQ
Is SK Hynix part of Samsung?
No. SK Hynix belongs to SK Group, a separate conglomerate, and its largest shareholder is SK Square. Samsung Electronics belongs to the Samsung Group. The two are direct competitors in memory chips.
Which is bigger, Samsung or SK Hynix?
Samsung Electronics is the larger company by revenue and number of businesses, since it also sells phones, TVs and appliances. In memory alone the race is much closer, and SK Hynix has led in HBM. For current market value, check the Korea Exchange or a financial data site, because rankings shift with share prices.
Who makes HBM for Nvidia?
SK Hynix has been a leading HBM supplier for Nvidia’s AI accelerators. Samsung and US-based Micron also make HBM and compete for orders. Supplier shares change with each HBM generation, so check company earnings calls for the latest.
Can I buy Samsung or SK Hynix stock from the US or Europe?
Yes, through a broker that offers access to the Korea Exchange, or indirectly through Korea or semiconductor funds that hold them. Samsung also has GDRs in London, and a Stocktwits listing shows an SK Hynix ADR ticker, SKHY. Ask your broker which lines it supports and what fees and currency conversion apply.
What is the difference between Samsung 005930 and 005935?
005930 is the common stock with voting rights. 005935 is the preferred stock, which usually has no vote and a slightly higher dividend, and often trades at a lower price. Both track the same company.
Does Samsung make chips for other companies like TSMC does?
Yes. Samsung Foundry makes chips for outside designers, competing with TSMC at advanced nodes. SK Hynix does not run a comparable leading-edge foundry, which is one of the biggest structural differences between them.
What to watch next for Korea’s chip giants
Start with the next earnings season: Samsung’s preliminary guidance shortly after the quarter closes, then full results from both. Watch HBM qualification news for Samsung, because closing the gap with SK Hynix would change the comparison more than anything else. For SK Hynix, follow the official details of the shareholder return plan the WSJ reported. Keep an eye on the SOX index and Nvidia’s results too, because they still set the mood in Seoul the next morning.
Related reading
Sources news.google.com · k-korea.blog
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