ADAT Authentidate Holding Corp.
NASDAQNo longer listed
ADAT was the NASDAQ ticker symbol of Authentidate Holding Corp. It no longer appears in current US listing files, which usually means the security was delisted, acquired, merged, or moved to a new symbol.
ADAT at a glance
- Symbol
- ADAT
- Company / issuer
- Authentidate Holding Corp.
- Last exchange
- NASDAQ
- Status
- No longer listed
- Seen in listing files
- Jan 2015
ADAT ticker history
All listing names we have recorded under the symbol ADAT, from periodic snapshots of US exchange listing files.
| Name | Security | First seen | Last seen |
|---|---|---|---|
| Authentidate Holding Corp. | — | 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 ADAT?
ADAT was the ticker symbol of Authentidate Holding Corp on NASDAQ.
Is ADAT still trading?
No. ADAT does not appear in current US exchange listings as of Sep 2026; it was last seen in our listing snapshots in Jan 2015.
Which exchange was ADAT listed on?
ADAT was listed on NASDAQ.
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