Context This is a follow-up to SK Hynix: the HBM leader in the AI revolution, SK Hynix HBM market share 2026, SK Hynix vs Micron and Micron FY3Q26 earnings.
TL;DR
SK Hynix’s SEC filings are not just an ADR wrapper. The sequence from the June 24 F-1, the June 30 F-1/A and the July 1 F-6 shows the company packaging its HBM leadership, eSSD, Custom HBM and Korea capex roadmap for U.S. AI-memory investors.
| Item | Confirmed | Investor interpretation |
|---|---|---|
| F-1/A | Filed June 30, 2026. Nasdaq Global Select Market application under SKHY. ADS count, price and net proceeds are still blank. | Not final terms yet. A further amendment or final prospectus is required. |
| F-6 | Filed July 1, 2026. Citibank is depositary. Each ADS represents one-tenth of one common share. | This fills the key ADR ratio that remained blank in the F-1/A cover. |
| New-share ceiling | Board authorization for up to 17,790,000 new common shares, 2.50% of 712,702,365 existing shares. | Maximum dilution is limited, but actual issuance remains unknown. |
The most important caveat: the F-6 registration of 1,780,000,000 ADSs is not the offering size. Form F-6 registers the ADR facility and the related depositary-fee calculation. The actual equity offering size depends on the final ADS count and offering price in the F-1/A or final prospectus.
The stock read-through is Watchlist. This is an access and ownership-base event, not a fresh discovery of the HBM thesis. The alpha question is whether U.S. long-only and AI-memory investors use SKHY as a cleaner vehicle for SK Hynix exposure.
1. Why The June 24 F-1 Is Not Enough
| Filing date | Form | Document | What changed |
|---|---|---|---|
| 2026-06-24 | F-1 | Registration No. 333-296987 | Initial ADS offering and Nasdaq listing preparation; key offering terms blank |
| 2026-06-30 | F-1/A | Amendment No. 1 | Offering structure, new-share ceiling, use of proceeds and capex tables updated; ADS count and price still blank |
| 2026-07-01 | F-6 | Registration No. 333-297185 | Citibank depositary and one ADS = one-tenth common share |
The company is SK hynix Inc. Its common shares trade on KOSPI under 000660. The ADSs are expected to trade on the Nasdaq Global Select Market under SKHY, subject to effectiveness and listing approval.
2. Offering Mechanics
| Item | Latest status |
|---|---|
| Issuer | SK hynix Inc. |
| ADS ticker | SKHY, Nasdaq Global Select Market application |
| Depositary | Citibank, N.A. |
| Global coordinators | BofA Securities, Citigroup, Goldman Sachs, J.P. Morgan |
| ADS ratio | F-6: 1 ADS = 0.1 common share |
| ADS count | Blank in F-1/A |
| Offering price | Blank in F-1/A |
| Net proceeds | Blank in F-1/A |
| Lock-up | 90-day lock-up may apply to the company and certain affiliates, subject to exceptions |
The board authorized up to 17,790,000 new common shares. Against 712,702,365 existing shares, that is 2.50%. If fully issued, new shares would be about 2.44% of the post-issue share count. This is a ceiling, not the actual offering size.
3. F-6 ADS Registration Is Not Equity Proceeds
The F-6 registers 1,780,000,000 ADSs, each representing one-tenth of one common share. It also uses a fee calculation of $5.00 per 100 ADSs, giving a proposed maximum aggregate fee-basis amount of $89,000,000 and a registration fee of $12,290.90.
That fee basis is not the gross equity offering. Investors should not read 1.78 billion ADSs as the number of ADSs that will be sold in this offering. The real offering size remains blocked until the final ADS count and offer price are filed.
4. Use Of Proceeds: Yongin, P&T7 And EUV
The F-1/A frames proceeds around general corporate purposes, including capital expenditures. The filing specifically discusses KRW 45.5 trillion of Korea production-facility capex and approximately KRW 11.9 trillion of EUV scanner cost, with EUV delivery expected by December 2027.
| Project | Target completion of planned investments | Total expected cost | Invested by May 31, 2026 | Additional planned investment |
|---|---|---|---|---|
| Yongin Fab 1 | End of 2030 | KRW 31.0T | KRW 4.4T | KRW 26.6T |
| Cheongju P&T7 | End of 2030 | KRW 19.0T | KRW 0.1T | KRW 18.9T |
| Total | End of 2030 | KRW 50.0T | KRW 4.5T | KRW 45.5T |
| Project | 2026 | 2027 | 2028 | 2029 | 2030 | Total |
|---|---|---|---|---|---|---|
| Yongin Fab 1 | KRW 7.4T | KRW 10.1T | KRW 6.6T | KRW 2.5T | KRW 0.0T | KRW 26.6T |
| Cheongju P&T7 | KRW 0.5T | KRW 2.1T | KRW 2.7T | KRW 5.8T | KRW 7.8T | KRW 18.9T |
| Total | KRW 7.9T | KRW 12.2T | KRW 9.3T | KRW 8.3T | KRW 7.8T | KRW 45.5T |
The business section and capex table use different milestones. The business section points to the first Yongin cleanroom opening in 1Q27 and P&T7 construction completion by end-2027. The capex table targets completion of planned investments by end-2030. That is not necessarily a contradiction; it separates phase-opening from full investment completion and equipment installation.
5. The Narrative: HBM, Custom HBM And eSSD
The F-1/A does not present SK Hynix as a plain DRAM-cycle company. It emphasizes HBM, server DRAM and eSSD as structural AI-infrastructure products.
| Market | IDC-based position in 1Q26 |
|---|---|
| DRAM including HBM | No. 2 by revenue, 29.1% share |
| HBM | No. 1 by revenue, 56.4% share |
| NAND flash | No. 2 by revenue, 18.5% share |
Custom HBM is especially important. The filing defines it as HBM that integrates certain GPU or ASIC functions into the HBM base die according to customer configuration. That shifts the story from memory pricing alone toward memory becoming part of the accelerator design stack.
6. Recent Financials
| Metric | 1Q25 | 1Q26 | Change |
|---|---|---|---|
| Revenue | KRW 17.639T | KRW 52.576T | +198.1% |
| Profit for the period | KRW 8.108T | KRW 40.346T | ~5.0x |
| Total assets | KRW 176.108T at 2025-end | KRW 222.829T at Mar. 31, 2026 | +26.5% |
| Total equity | KRW 120.667T at 2025-end | KRW 164.380T at Mar. 31, 2026 | +36.2% |
| Product | 1Q26 revenue | Share |
|---|---|---|
| DRAM | KRW 40.659T | 77.3% |
| NAND | KRW 11.574T | 22.0% |
| Other | KRW 0.343T | 0.7% |
The U.S. accounted for KRW 33.999T, or 64.7% of 1Q26 revenue. That makes the ADR event strategically coherent: the investor access point is moving closer to the customer-revenue geography.
7. Shareholders, Dividends And Governance
| Shareholder | Shares | Ownership |
|---|---|---|
| SK Square | 146,100,000 | 20.50% |
| National Pension Service | 57,439,774 | 8.06% |
| BlackRock | 36,407,157 | 5.11% |
| Capital Research and Management | 25,149,374 | 3.53% |
| Others | 445,979,195 | 62.58% |
| Treasury shares | 1,626,865 | 0.23% |
The filing says the maximum offering size reflects the Korean Monopoly Regulation and Fair Trade Act requirement that SK Square maintain at least 20% ownership.
The 2025-2027 base dividend policy is KRW 1,500 per share per year, paid quarterly at KRW 375. The 2025 total dividend was KRW 3,000 per share after additional annual distribution. This ADR story is not a dividend story; it is a capex and AI-memory access story.
8. Risks
The main risk factors remain memory cyclicality, HBM manufacturing complexity, AI infrastructure slowdown, customer concentration, U.S.-China restrictions, raw materials, water, power, equipment, foreign-exchange volatility and ADS-specific rights. ADS holders exercise voting and dividend rights through the depositary and can face conversion, cancellation or redeposit limitations.
9. Investment View
SKHY can make SK Hynix easier to own for U.S. AI-memory investors. It can also make the comparison with Micron’s U.S.-listed AI-memory premium more direct.
But this is not yet an immediate buy signal. The final ADS count, offering price, net proceeds, effective date and first trading date remain unavailable. The event belongs on the watchlist until those terms are filed.
Watch List
| Watch item | Why it matters |
|---|---|
| Next F-1/A or final prospectus | ADS count, offering price and net proceeds |
| SEC effectiveness | Start of real offering timeline |
First SKHY trading date | U.S. investor access becomes observable |
| KRX common vs ADS parity | Premium, discount or arbitrage pressure |
| Offer price relative to KRX | Demand strength and near-term flow risk |
| U.S. AI-memory ETF inclusion | Potential structural demand |
| 2Q/3Q HBM ASP and shipments | Whether the filing narrative converts into earnings |
| Custom HBM and eSSD commentary | Whether SK Hynix becomes a memory platform, not only an HBM supplier |
| Yongin, P&T7 and Indiana milestones | Whether capex turns into supply capacity on schedule |