Deprecated — sunset 30 September 2027. Use Ticker Changes instead — it is backed by a dedicated symbol-change ledger with effective dates. This endpoint keeps working unchanged until the sunset date; every response carries Deprecation, Sunset and Link headers so clients can detect the schedule programmatically (see the Versioning guide).

Overview

Given a ticker symbol (current or any prior incarnation), returns the company's current symbol and the full list of historical tickers it has used, each with the date the company moved off of it. Search is case-insensitive.

When to use

• Resolving an old ticker that returns 404 elsewhere to its current symbol.
• Building a "former tickers" sidebar on a company profile.
• Normalizing a watchlist where tickers may have changed.

Key parameters

• ticker (required) — current or historical symbol.

Response highlights

• current_ticker — the company's symbol today.
• historical_tickers — array of { ticker, date_changed } objects. date_changed is the date the symbol changed away from that ticker; may be null if the change date is unrecorded.

Notes

• Returns 404 Not Found if the supplied ticker isn't matched in either current or historical records.