Ticker Symbols and Exchanges

Last reviewed on 2026-04-27.

Type a ticker symbol into the search box on this site and a dashboard appears. The convention is so familiar that the underlying machinery rarely gets a second thought. But anyone who has ever searched for a non-US company has run into a surprise: the same business can trade under several different symbols, on several different exchanges, in different currencies, sometimes at slightly different prices. This page is a tour of why.

What a ticker symbol actually is

A ticker symbol is a short identifier — usually one to five letters — that an exchange assigns to a security so it can be quoted and traded unambiguously. The symbol belongs to the listing on that specific exchange, not to the company in the abstract. When the same company is listed on multiple venues, each venue assigns its own symbol.

Symbols can change. Companies rebrand, merge, demerge or go private; the exchange retires the old symbol and may reassign it to something else later. Because of that, an old chart and a new chart sharing the same letters do not necessarily describe the same business; data vendors keep track of the lineage, but the symbol alone is not a stable identifier across decades.

US conventions

In the United States, the major venues are the New York Stock Exchange (NYSE), Nasdaq, NYSE American (formerly AMEX), and the OTC markets. NYSE-listed common stock is conventionally one to three letters; Nasdaq is conventionally four letters; OTC tickers tend to be five letters with a trailing F or Y suffix. Those rules are guidelines rather than absolutes — exceptions exist on every side.

A few suffixes turn up frequently:

• .A, .B — different share classes, usually with different voting rights or different dividends. The two will trade at slightly different prices because the rights are not identical.
• .PR or -P — preferred shares (a hybrid of equity and debt-like income).
• .WS or -W — warrants (an option-like security issued by the company).
• F at the end of a five-letter OTC symbol — a foreign ordinary share quoted in the US in dollars without a sponsored ADR program.
• Y at the end of a five-letter OTC symbol — a sponsored American Depositary Receipt (ADR), discussed below.

International exchange suffixes

Outside the US, data vendors typically append an exchange suffix to the local symbol so that it is unambiguous globally. These suffixes are not part of the symbol used inside the local market, but they are part of how the symbol is referenced on platforms like the one embedding TradingView widgets here. A few of the common ones:

• .L — London Stock Exchange. SHEL.L is Shell's London listing.
• .TO — Toronto Stock Exchange. RY.TO is Royal Bank of Canada in Toronto.
• .V — TSX Venture (junior listings in Canada).
• .HK — Hong Kong Stock Exchange.
• .T or .JP — Tokyo Stock Exchange.
• .SS — Shanghai. .SZ — Shenzhen.
• .AX — Australian Securities Exchange.
• .DE, .F — Xetra and Frankfurt (Germany).
• .PA — Euronext Paris. .AS — Euronext Amsterdam. .BR — Euronext Brussels. .MI — Borsa Italiana Milan. .MC — Madrid.
• .SW or .S — SIX Swiss Exchange.
• .ST — Stockholm. .HE — Helsinki. .OL — Oslo. .CO — Copenhagen.

The exact form of the suffix varies between data vendors and platforms; the embedded chart widget on this site uses the conventions documented in TradingView's own market-coverage pages.

Primary, secondary and dual listings

Every company has a single primary listing — the venue where the underlying shares actually trade and where the company's home regulator has jurisdiction. Many large companies also list on additional exchanges to make their shares accessible to investors in other regions and time zones. Those are secondary listings.

A few important consequences:

• Prices on the primary and secondary listings track each other through arbitrage, but they are quoted in different currencies. A 1% move in the primary listing usually shows up in the secondary, plus or minus the day's currency move.
• Liquidity tends to concentrate at the primary venue. Spreads on a secondary listing can be wider, especially around the open and close.
• Trading hours differ. A European-listed stock with a US secondary listing trades roughly six hours overlapping with the US session and the rest only in Europe.
• Some corporate actions — special dividends, scrip issues — process slightly differently on each venue.

American Depositary Receipts (ADRs)

Many non-US companies are accessible to US investors not as direct foreign shares, but as ADRs. An ADR is a US-traded security issued by a custodian bank that holds the underlying foreign shares on the investor's behalf. The receipt represents a defined number of foreign shares — sometimes one-for-one, sometimes one ADR per several shares, sometimes the inverse.

ADRs come in flavours:

• Sponsored Level I — quoted on the OTC markets. The company cooperates with the bank that issues them but does not file with the SEC. Commonly the OTC ticker ending in Y.
• Sponsored Level II — listed on a major US exchange (NYSE, Nasdaq) without raising new capital in the US. Subject to SEC reporting.
• Sponsored Level III — listed on a major US exchange and used to raise new capital. Highest disclosure obligations.
• Unsponsored — created by one or more banks without the issuer's involvement. Multiple unsponsored ADRs for the same company can coexist, with different ratios and different liquidity.

For most readers, the practical point is that a "US ticker" for a foreign company is often an ADR rather than the underlying share. Quote, dividend handling and tax treatment can differ from the home-market listing in ways that matter to a long-term investor.

Cross-currency and conversion ratios

An ADR price is the home-currency share price multiplied by the ADR ratio, divided by the exchange rate. If a London-listed share is at GBP 80 and the ADR ratio is 1:1 with GBP/USD at 1.25, the ADR should trade near USD 100. Reality almost always lands a fraction of a percent away because of execution costs, but the arithmetic is the anchor. If an ADR is materially mispriced relative to its home-listing equivalent, arbitrage closes the gap quickly.

The same logic explains why two companies in the same group of indices can have very different absolute share prices and still be comparable in size. A company with a USD 10 share price and 10 billion shares outstanding has the same market capitalisation as a company with a USD 100 share price and 1 billion shares outstanding. Per-share figures — EPS, dividend, book value — also depend on the share count, so absolute share price tells very little on its own.

Stock splits and corporate actions

A stock split adjusts the number of shares outstanding without changing the company's value: a 2-for-1 split doubles the share count and halves the price. A reverse split does the opposite. On the chart, vendor data is usually adjusted backwards so a long-term chart looks continuous, but the historical number of shares outstanding has changed.

Other corporate actions — special dividends, spin-offs, reverse mergers, ticker changes — break the apparent continuity of a price series in ways the chart cannot always show. When a chart looks anomalous, the cause is often a corporate action rather than an actual market event.

Practical implications when searching on this site

The search bar resolves a typed symbol against the embedded data vendor's symbol table. A few practical notes:

• For US-listed names, the bare ticker ("AAPL", "NVDA") works.
• For non-US listings, the full vendor symbol with exchange prefix or suffix is the safer query, e.g. SHEL (US ADR) versus LSE:SHEL (London listing) versus HEXAB versus international primary listings on other exchanges.
• Two letters like "X" can resolve to multiple companies historically; always double-check the company-profile widget to confirm the result is the company expected.

The markets page uses fully-qualified symbols (NASDAQ:AAPL, BITSTAMP:BTCUSD) for clarity. The screener includes exchange and country filters that are the right place to constrain a search to a specific market — see the screener guide for how to use them.

Common mistakes

• Confusing two listings of the same company. A reader buying the London listing and tracking the New York ADR will see misleading discrepancies that are mostly currency.
• Reading absolute share price as a quality signal. A USD 5 stock and a USD 500 stock can be the same business measured differently. Market cap is the comparable.
• Ignoring share class. Voting and non-voting classes of the same company can trade at meaningfully different prices for good reasons.

Nothing on this page is investment advice. See the disclaimer for the full position.