SIAL Sigma-Aldrich Corporation
SIAL was the NASDAQ ticker symbol of Sigma-Aldrich Corporation. It no longer appears in current US listing files, which usually means the security was delisted, acquired, merged, or moved to a new symbol.
SIAL at a glance
- Symbol
- SIAL
- Company / issuer
- Sigma-Aldrich Corporation
- Security type
- Common stock
- Last exchange
- NASDAQ
- Status
- No longer listed
- Seen in listing files
- Jan 2015
SIAL ticker history
All companies and securities we have recorded under the symbol SIAL, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Sigma | — | Jan 2015 | Jan 2015 |
| Sigma-Aldrich Corporation | Common Stock | 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 SIAL?
SIAL was the ticker symbol of Sigma-Aldrich Corporation on NASDAQ.
Is SIAL still trading?
No. SIAL does not appear in current US exchange listings as of Sep 2026; it was last seen in our listing snapshots in Jan 2015.
Which companies have used the ticker SIAL?
Our listing records show SIAL used by: Sigma; Sigma-Aldrich Corporation.
Which exchange was SIAL listed on?
SIAL was listed on NASDAQ.