MACK Merrimack Pharmaceuticals Inc.
NASDAQNo longer listedCommon stock
MACK was the NASDAQ ticker symbol of Merrimack 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.
MACK at a glance
- Symbol
- MACK
- Company / issuer
- Merrimack Pharmaceuticals Inc.
- Security type
- Common stock
- Last exchange
- NASDAQ
- Status
- No longer listed
- Seen in listing files
- Jan 2015 – Apr 2024
- Sector
- Health Care
- Industry
- Biotechnology: Pharmaceutical Preparations
- Country
- United States
- IPO year
- 2012
- Last reported market cap
- $214.0 million (Apr 2024)
MACK ticker history
All listing names we have recorded under the symbol MACK, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Merrimack Pharmaceuticals Inc. | Common Stock | Jan 2015 | Apr 2024 |
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 MACK?
MACK was the ticker symbol of Merrimack Pharmaceuticals Inc on NASDAQ.
Is MACK still trading?
No. MACK does not appear in current US exchange listings as of Sep 2026; it was last seen in our listing snapshots in Apr 2024.
Which exchange was MACK listed on?
MACK was listed on NASDAQ.
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