A Korean ADR looks like a US stock. It has a ticker, a dollar price, and a place in your brokerage account. Underneath, it’s a contract with a bank that holds Korean shares on your behalf, and that contract decides most of what you can do with it.
Here’s the short version. You can generally hand a Korean ADR back and take the shares in Seoul, but going the other way, from Korean shares into new ADRs, can need the company’s consent. Dividends arrive in won, get converted by the depositary bank, and come to you after Korean tax and the bank’s fees. New-share offerings may pass you by. And the company can end the arrangement without asking you.
This guide walks through each of those mechanics. If you want the list of which Korean companies have ADRs at all, our list of Korean ADRs on US exchanges covers tickers, ratios, and depositary banks.
Key Takeaways
- An ADR is a claim, not a share. A US depositary bank holds the Korean shares through a custodian, and your rights come from the deposit agreement.
- Conversion runs more freely one way. You can generally surrender ADRs for the underlying shares. Turning Korean shares into new ADRs can require the issuer’s prior consent above a set quantity, and issuers say they may refuse.
- Dividends take a longer road. They’re paid to the depositary in won, converted to dollars, and paid out after fees, with Korean withholding of 22.0% or a treaty rate.
- Rights offerings can skip you. If the company doesn’t register the offering in the US, ADR holders may not be able to subscribe.
- The program can end. An issuer can direct the depositary to terminate the deposit agreement, and the depositary may then sell the shares it holds.
Contents
- What you actually own
- How shares become ADRs, and why that’s capped
- Going back to the Korean shares
- Why the two prices can drift apart
- How a dividend reaches an ADR holder
- Rights offerings and dilution
- When the program ends
- The Korean tax side, briefly
- Frequently asked questions
1. What you actually own
When you buy a Korean ADR, the shares themselves sit in Korea. The depositary bank (Citibank, for SK Hynix) holds them through a local custodian, and you hold a receipt for a fixed slice of them. SK Hynix’s July 9, 2026, prospectus puts it in one line: the depositary holds the underlying shares “through its custodian,” and you have the rights set out in the deposit agreement.
For SK hynix, that custodian is the Korea Securities Depository in Busan. Each SK hynix ADR on Nasdaq represents one-tenth of a common share.
That arrangement explains everything that follows. Your relationship isn’t with the company’s share register in Seoul. It’s with a bank, under a contract the company and the bank wrote, and the contract decides when you can convert, how you’re paid, and what happens if the program closes.
2. How shares become ADRs, and why that’s capped
There are two ways an ADR comes into existence.
New shares, issued for the program. SK hynix says that to issue common shares to the depositary for ADRs, it must file a securities registration statement with Korea’s Financial Services Commission, and that statement must become effective.
Existing shares, deposited by an investor. This is the route with a limit on it, and the limit is set out in the companies’ own filings.
SK Hynix says that under a presidential decree issued under Korea’s Capital Markets Act and the FSC’s rules, the depositary needs the company’s prior consent for any deposit of issued shares that exceeds the number the company itself deposited for the program. Its deposit agreement adds a second gate: consent is also needed if a deposit would push the ADR total past legal or charter limits or past “a specified maximum that we may establish from time to time.”
KEPCO’s annual report on Form 20-F, filed April 29, 2026, gives the same rule as a formula. Consent is needed for any deposit larger than the gap between what the company has deposited for ADRs and what’s on deposit at the time. So when ADR holders withdraw shares, room opens up. Once that room is used, new deposits need the company’s approval.
And all three companies say plainly that approval isn’t automatic. SK Hynix: “It is possible that we may not give such consent.” KEPCO: “We may not grant this consent.” KT’s 2025 annual report adds that its depositary bank plans, at a time it considers appropriate, to start accepting deposits without KT’s consent up to the amount Korean rules allow. As of that April 2026 filing, the bank was still asking for consent, and KT said it may not provide it.
What that means for you: the number of ADRs can’t always grow to meet demand. If buyers want more of the US line, converting Seoul shares may not be an option.
3. Going back to the Korean shares
The exit is wider than the entrance. You can surrender your ADRs to the depositary for cancellation and take delivery of the underlying shares, and the depositary charges a fee for it. SK Hynix’s agreement gives that right at any time, with three exceptions: temporary delays while transfer books are closed or shares are tied up around a shareholders’ meeting or dividend, unpaid fees and taxes, and legal restrictions. Korean rules also list shares received this way among the exceptions to the general requirement that foreigners trade listed shares only through the exchange, and once you hold them you can vote, take new-share rights and receive dividends without any further government approval.
The catch is the one-way door. SK Hynix warns that if you withdraw shares, “you may not be allowed to deposit the common shares again to obtain ADSs.” Once you’re out, the consent rules in section 2 apply to you like anyone else.
Withdrawing also means you now hold Korean shares, with Korea’s own trading rules, and the won proceeds of any sale land in a won account in Korea. Our guide to investing in Korean stocks from abroad compares the routes for holding them.
Not every Korean ADR has a Seoul share to go back to. Gravity’s annual report says the common shares underlying its ADRs aren’t listed on any stock exchange in Korea.
4. Why the two prices can drift apart
On paper, an ADR’s fair value is the Seoul price times its ratio, converted into dollars. When the two drift apart, someone can buy the cheaper one, convert, and sell the dearer one. SK Hynix’s prospectus names that practice, arbitrage, and warns it could create unexpected volatility in both its Seoul shares and its Nasdaq ADRs.
Korea’s consent rule breaks half of that loop. If the ADR is cheaper, the trade works: buy ADRs, surrender them, and sell the shares in Seoul. If the ADR is dearer, the trade needs new ADRs, and new ADRs from existing shares can need the issuer’s consent once the room in the program runs out. So a gap where the ADR sits above the Seoul share can last longer than a gap the other way.
Foreign ownership ceilings add a second layer for some names. KEPCO carries a 40.0% ceiling on foreign ownership, and KT’s 20-F says foreigners may not own more than 49.0% of its voting shares. KEPCO’s filing says shares acquired by a depositary to issue ADRs are one of the cases where the ceiling may be exceeded, and that shares withdrawn from an ADR program generally count as foreign ownership. When a stock’s foreign room is tight, the ADR can become the easier way in. Our explainer on Korea’s foreign ownership ceilings covers how those limits work on the exchange.
Before you compare prices at all, do the arithmetic. Ten SK hynix ADRs make one share, and two KEPCO ADRs make one. A quote that looks cheap often isn’t, once you adjust for the ratio and the exchange rate.
5. How a dividend reaches an ADR holder
A Korean dividend paid on ADR shares travels further than one paid to a shareholder in Seoul.
| Step | What happens | Source |
|---|---|---|
| 1. The company pays | Cash dividends go to the depositary in won. | SK Hynix prospectus |
| 2. Korea withholds | 22.0%, including local income tax, or a lower treaty rate | SK Hynix prospectus |
| 3. The bank converts | The depositary converts won into dollars, subject to certain conditions. | SK Hynix prospectus |
| 4. Fees come out. | The depositary pays out after deducting its fees and expenses. | SK Hynix prospectus |
| 5. You’re paid | Distribution fees are charged to holders as of the ADS record date. | SK Hynix prospectus |
Two things in that chain vary more than people expect.
The fee depends on the issuer. SK Hynix’s agreement allows fees of up to $5.00 per 100 ADSs each for issuing ADSs, cancelling them, and distributing cash, and its fee schedule notes that some charges may be cumulative. KT’s 20-F shows a different schedule: up to $0.05 per ADS on issuance and on surrender, and “None” for distributing dividends. Read the fee table for the company you hold.
Conversion isn’t guaranteed. If converting won is impractical or unlawful, SK Hynix’s agreement lets the depositary convert what it can, pay out the won directly, or hold the money without interest.
On tax, the ADR doesn’t get you a better rate than the share. For US residents, KB Financial’s annual report gives the treaty rates as 16.5% or 11.0%, including the local income surtax. Under the treaty, the 11.0% rate is only for a US company that owns at least 10% of the Korean company’s voting stock, so individual investors are looking at 16.5%. Our guide to collecting Korean dividends as a foreign investor explains how the record date and the withholding work on the Seoul side.
6. Rights offerings and dilution
Korean shareholders are generally entitled to preemptive rights when a company issues new shares. ADR holders may not be. SK hynix’s prospectus says that if a US registration statement is required for you to exercise those rights and the company doesn’t file one, you may not be able to subscribe, and your stake can be diluted.
The deposit agreement sets out what happens instead. If it’s lawful and reasonably practicable, the depositary sets up a way for you to exercise. If not, it sells the rights and passes on the proceeds, provided that sale is also lawful and practicable. If it can’t sell them, the rights lapse.
For a long-term holder, that’s the gap that matters most in a capital raise. A shareholder in Seoul generally gets the right to subscribe. You might get a cash payment from the sale of rights you couldn’t use, or nothing.
7. When the program ends
The deposit agreement isn’t permanent. SK hynix says it may amend or terminate the agreement without your consent, that it has the right to direct the depositary to terminate it, and that the depositary may in certain circumstances terminate it on its own.
Until termination, your rights stay the same. After it, the depositary keeps collecting distributions but holds them until you surrender your ADRs, and it may sell the shares on deposit. SK hynix adds one more possible exit: the depositary may offer a way to move into an unsponsored ADR program it sets up, subject to Korean law, US regulatory requirements and fees.
So if you hold through a termination, you may face a choice between taking the Korean shares and waiting for cash from a sale whose timing and price you don’t control. Neither is a reason to avoid ADRs. It’s a reason to read the company’s notice when one arrives instead of letting it sit.
8. The Korean tax side, briefly
Two Korean taxes have their own rules for ADRs.
Transaction tax. KB Financial’s filing states that transfers of depositary receipts listed on the New York Stock Exchange, Nasdaq or other qualified foreign exchanges are exempt from Korea’s securities transaction tax.
Capital gains. According to SK hynix’s prospectus, gains a non-resident earns from transferring ADRs outside Korea are generally exempt from Korean income tax, provided the ADRs are deemed to have been issued overseas. There’s a catch for anyone who starts with Korean shares: the prospectus says a holder who converts underlying shares into ADRs and then sells those ADRs is not exempt.
Dividends don’t get that treatment. Withholding applies at the same rate whether you hold shares or ADRs, and what your home country charges is a separate calculation. For the US side, our guide to buying Korean stocks from the US, tax included walks through it.
Put together, the ADR suits a fairly specific investor: you want one named Korean company inside a US account, and you’re willing to give up a direct vote, some rights-offering protection and, at some issuers, a slice of each dividend in fees. If the company you want isn’t on the ADR list, or rights offerings matter to you, the Korean shares themselves may serve you better. That’s a judgment about your own situation, not a recommendation.
9. Frequently asked questions
Can I convert my Korean shares into ADRs?
Sometimes. Korean issuers describe a rule that requires their prior consent for deposits above a set quantity, and SK hynix, KEPCO and KT each say they may not give it. Check the company’s latest 20-F or prospectus under the deposit section.
Can I convert ADRs back into Korean shares?
Generally, yes. You can surrender ADRs to the depositary for the underlying shares, for a fee. Delays, fees, taxes and legal limits can get in the way, and SK hynix warns you may not be able to deposit those shares again afterward.
Why would a Korean ADR trade above the Seoul price?
Arbitrage can close a gap where the ADR is cheaper, by surrendering ADRs and selling the shares. Closing a gap where it’s dearer needs new ADRs, and those can require the issuer’s consent. Foreign ownership ceilings at some companies add to it.
Is the dividend tax lower on a Korean ADR?
No. Korea withholds 22.0% including local income tax, or a treaty rate, on dividends to non-residents whether they hold shares or ADRs. For US residents, KB Financial gives the treaty rates as 16.5% or 11.0%. The 11.0% rate is for a US company owning at least 10% of the voting stock, so for individuals it’s 16.5%.
What happens to my ADRs if the program is terminated?
The depositary keeps collecting distributions until you surrender, and it may sell the underlying shares. SK hynix’s agreement also allows a possible move into an unsponsored ADR program, subject to conditions.
Disclaimer: This article is for general informational purposes only and does not constitute investment, legal or tax advice. The mechanics described come from the SK hynix prospectus dated July 9, 2026 and from annual reports on Form 20-F filed with the US Securities and Exchange Commission by KEPCO, KT and KB Financial in April 2026. Deposit agreements differ by issuer and can be amended, so confirm the current terms in the filings for the company you hold, and consult a qualified tax professional about your own position.
Last updated: November 2, 2026
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