AMTM Dark Pool Activity
Amentum Holdings, Inc.
Data as of Sep 11, 2026 · Source: FINRA daily short sale volume (off-exchange)
On Sep 11, 2026, FINRA reported 341K AMTM shares in publicly disseminated off-exchange trades (dark pools and other off-exchange venues). 205K of those shares (60.0%) were marked short or short-exempt, above AMTM's 30-day rolling average of 48.5% (z-score 1.11).
Off-Exchange Volume
341K
Short Volume
205K
Short Volume Ratio
60.0%
30-Day Average
48.5%
z-score 1.11
AMTM dark pool FAQ
- How much AMTM off-exchange volume did FINRA report on Sep 11, 2026?
- FINRA's daily short sale volume file reported 341K AMTM shares in publicly disseminated off-exchange trades on Sep 11, 2026; 205K of those shares (60.0%) were marked short or short-exempt.
- Is AMTM's dark pool short volume ratio unusual right now?
- As of Sep 11, 2026, AMTM's short volume ratio of 60.0% is above AMTM's 30-day rolling average of 48.5% (z-score 1.11). Meridian's dark pool model does not flag this reading as an anomaly.
- What does the dark pool short volume ratio measure?
- FINRA publishes daily short sale volume for trades reported off-exchange to its trade reporting facilities, which include dark pools and other off-exchange venues. The ratio divides FINRA's ShortVolume figure, which counts both short and short-exempt sales, by the total off-exchange shares reported for that day. It is not short interest and not a directional signal: market-maker hedging and reporting mechanics can raise it, so it is context for other signals.