ISIS Isis Pharmaceuticals, Inc.
ISIS was the NASDAQ ticker symbol of Isis Pharmaceuticals, Inc. It no longer appears in current US listing files, which usually means the security was delisted, acquired, merged, or moved to a new symbol. SEC records list “Isis Pharmaceuticals Inc” as a former name of Ionis Pharmaceuticals Inc, which trades today as IONS.
ISIS at a glance
- Symbol
- ISIS
- Company / issuer
- Isis Pharmaceuticals, Inc.
- Last exchange
- NASDAQ
- Status
- No longer listed
- Seen in listing files
- Jan 2015
ISIS ticker history
All listing names we have recorded under the symbol ISIS, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Isis Pharmaceuticals, Inc. | — | Jan 2015 | Jan 2015 |
Snapshots have gaps (notably 2018–2021, and 2015–2021 for NYSE listings), so the actual delisting date may be later than the last-seen date.
Frequently asked questions
What company has the ticker symbol ISIS?
ISIS was the ticker symbol of Isis Pharmaceuticals, Inc on NASDAQ.
Is ISIS still trading?
No. ISIS does not appear in current US exchange listings as of Sep 2026; it was last seen in our listing snapshots in Jan 2015. The company now appears to trade as IONS (Ionis Pharmaceuticals Inc).
Which exchange was ISIS listed on?
ISIS was listed on NASDAQ.