ISIN to Ticker: How to Convert Between ISIN and Stock Ticker Symbols

Last updated: March 2026 · 14 min read

You have an ISIN code like US0378331005 and need the ticker symbol AAPL. Or vice versa. Unlike ISIN↔CUSIP or ISIN↔SEDOL, there's no algorithmic way to convert between ISIN and ticker — you always need a lookup. This guide covers every method available, from free tools to professional APIs.

1. Why ISIN to Ticker Is Harder Than You Think

Converting between ISIN and CUSIP is trivial — the CUSIP is embedded in US ISINs. Converting ISIN to SEDOL is straightforward for GB securities. But ISIN to ticker has no algorithmic shortcut. Here's why:

• Tickers are exchange-specific — they're assigned by each stock exchange independently, with no global standard
• Tickers change — companies rebrand (FB → META), merge, or get acquired. ISINs are much more stable
• Tickers are reused — after a company delists, its ticker can be reassigned to a completely different company
• No governing standard — unlike ISIN (ISO 6166), CUSIP, or SEDOL, there's no international standard for ticker symbols

This means you always need a database lookup — either through an online tool, an API, or a manual search on a financial data platform.

2. The One-to-Many Problem

A single ISIN can map to multiple ticker symbols. This is the biggest gotcha when converting:

The reverse is also problematic: the same ticker can refer to different securities on different exchanges. CBA is Commonwealth Bank on the ASX but a completely different company on NYSE.

3. Free Online Tools

Our Financial ID Translator (Recommended)

The fastest free option. Enter any ISIN and get the corresponding ticker symbol(s), plus CUSIP, SEDOL, WKN, and other identifiers:

• ISIN → Ticker Converter — instant lookup, no registration
• Batch Converter — convert up to 50 ISINs at once

OpenFIGI (Bloomberg)

OpenFIGI is Bloomberg's free identifier mapping service. You can search by ISIN and get back FIGI codes along with ticker symbols and exchange information. It's the gold standard for free identifier resolution.

• Pros: Extremely comprehensive, covers global instruments, provides exchange MIC codes
• Cons: Returns FIGI as primary output (ticker is a secondary field), API rate limits for free tier

Stock Exchange Websites

Most stock exchanges have ISIN search built into their websites:

• NYSE/NASDAQ — Search by ISIN on the NYSE website
• LSE — The London Stock Exchange search accepts ISIN
• Deutsche Börse — Börse Frankfurt has excellent ISIN search with WKN cross-reference
• SIX Swiss Exchange — Search by ISIN on SIX Group

Financial Data Platforms

4. API Methods (for Developers)

If you need to convert ISINs to tickers programmatically, here are the best APIs:

OpenFIGI API (Free)

The best free option. Send an ISIN, get back ticker + exchange + FIGI:

# cURL example: ISIN to Ticker via OpenFIGI
curl -X POST "https://api.openfigi.com/v3/mapping" \
  -H "Content-Type: application/json" \
  -d '[{"idType":"ID_ISIN","idValue":"US0378331005"}]'

# Response (simplified):
[{
  "data": [{
    "figi": "BBG000B9XRY4",
    "name": "APPLE INC",
    "ticker": "AAPL",
    "exchCode": "US",
    "compositeFIGI": "BBG000B9Y5X2",
    "securityType": "Common Stock",
    "marketSector": "Equity"
  }]
}]

Rate limits: 25 requests/minute without API key, 250/minute with a free key. Each request can contain up to 100 ISINs in a batch.

Alpha Vantage (Free Tier Available)

# Alpha Vantage SYMBOL_SEARCH (search by ISIN)
curl "https://www.alphavantage.co/query?function=SYMBOL_SEARCH\
&keywords=US0378331005&apikey=YOUR_KEY"

# Returns matching symbols with region and currency info

Finnhub (Free Tier Available)

# Finnhub: search by ISIN
curl "https://finnhub.io/api/v1/search?q=US0378331005\
&token=YOUR_KEY"

# Returns symbol matches across supported exchanges

Comparison of APIs

5. Manual Lookup Methods

Method 1: Decode the Country Code

The first two letters of an ISIN tell you the country of registration. This narrows down which exchange to check:

Method 2: Extract CUSIP/SEDOL → Search

For US and UK securities, you can extract the embedded identifier and search with that:

US ISIN → extract CUSIP → search Bloomberg/EDGAR
  US0378331005 → CUSIP 037833100 → AAPL

GB ISIN → extract SEDOL → search LSE
  GB00BH4HKS39 → SEDOL BH4HKS3 → VOD

This two-step approach works well because CUSIP and SEDOL databases are widely searchable. See our guides on ISIN vs CUSIP and SEDOL vs ISIN for extraction details.

Method 3: SEC EDGAR (US Securities Only)

For US securities, the SEC's EDGAR database provides free ISIN lookups. Search the EDGAR Company Search — while it doesn't directly accept ISIN, you can search by CUSIP (characters 3-11 of a US ISIN) to find the company and its ticker.

6. Ticker to ISIN (Reverse Lookup)

Going from ticker to ISIN is generally easier because you know the exchange context:

Quick Methods

• Our converter: Use the Financial ID Translator — enter any ticker and get all associated identifiers
• Bloomberg Terminal: Type AAPL US <Equity> DES → the ISIN is on the description page
• Yahoo Finance: Search the ticker, look under "Profile" or "Statistics" for the ISIN
• Google search: Simply search "AAPL" ISIN — the ISIN often appears in search results from financial sites

7. 50 Popular ISIN-to-Ticker Mappings

Reference table of the most commonly searched ISIN-to-ticker conversions:

US Stocks (Mega Caps)

European Stocks

Popular ETFs

8. Special Cases

ADRs (American Depositary Receipts)

ADRs have their own US ISIN (starting with US), separate from the home-country ISIN of the underlying stock:

Bonds

Government and corporate bonds have ISINs but usually don't have ticker symbols in the traditional sense. Instead, bonds are identified by:

• ISIN — the primary identifier for bonds globally
• CUSIP — used in US bond markets
• Bloomberg ID — e.g., T 4.5 02/15/36 Govt
• Some platforms assign pseudo-tickers (e.g., US10Y for the 10-year Treasury benchmark)

Dual-Listed Stocks

Some companies are listed on multiple exchanges with the same ISIN but different tickers:

• Rio Tinto: ISIN GB0007188757 → RIO (LSE) / RIO (ASX) / RIO (NYSE) — same ticker, different exchanges
• Unilever: ISIN GB00B10RZP78 → ULVR (LSE) / UNA (Euronext Amsterdam) / UL (NYSE ADR) — different tickers

9. Frequently Asked Questions