$AMTM
Amentum Holdings, Inc.
XNYS•Technology•Services-Business Services, Nec
Why is AMTM down today? It is at $20.70 (-1.57%), and our scanner flagged it 89 times on unusual volume this month. See the catalyst behind the move, real-time alerts the moment AMTM spikes, and full due diligence on AMTM — key stats, earnings, dilution and insider activity. Free.
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Key Stats
- Price
- $20.70
- Change today
- -1.57%
- Previous close
- $21.03
- 52-week range
- $19.80 – $38.11
- Market cap
- $5.12B
- Institutional own.
- 95.96%
- Total held
- 100.0%
- Short interest
- 12.4M ▼ -8% vs prior · as of 2026-07-31
- Days to cover
- 7.1d
- Avg daily volume
- 2.0M
- Sector
- Technology
- Industry
- Services-Business Services, Nec
- Exchange
- XNYS
- 5m
- 0.8x
- 15m
- 0.8x
- 1h
- 0.6x
- 1D
- 0.4x
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Why is $AMTM down today?
AMTM is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 4 unusual-volume and momentum alerts on AMTM today, peaking at 9.3x its normal volume.
Latest filing10-QQuarterly report (10-Q)Aug 11, 2026 · 9 days agoAnalyst data via Nasdaq. Not investment advice.
Insiders
0 buys, 0 sells last 3 months (15/21 over 12 months)Show 12 recent transactionsMinimize 12 recent transactions
| Insider | Action | Shares | % of position | Owns after | Value | Date |
|---|---|---|---|---|---|---|
Arnette Stephen A Officer | Sold (automatic/other) | -3K | sold 3.0% | 107K | $82K at $24.89 | May 6, 26 |
Arnette Stephen A Officer | Other | 14K | added 14% | 110K | n/a | May 6, 26 |
Bruning Jill L Officer | Sold (automatic/other) | -3K | sold 1.4% | 197K | $68K at $24.89 | May 6, 26 |
Bruning Jill L Officer | Other | 9K | added 4.7% | 200K | n/a | May 6, 26 |
Johnson Travis Barton Officer | Sold (automatic/other) | -4K | sold 3.4% | 118K | $102K at $24.89 | May 6, 26 |
Johnson Travis Barton Officer | Other | 14K | added 13% | 122K | n/a | May 6, 26 |
Mullen Sean Thomas Officer | Sold (automatic/other) | -3K | sold 7.8% | 32K | $69K at $24.89 | May 6, 26 |
Mullen Sean Thomas Officer | Other | 9K | added 35% | 35K | n/a | May 6, 26 |
Heller John E. Officer | Sold (automatic/other) | -8K | sold 2.1% | 376K | $204K at $24.89 | May 6, 26 |
Heller John E. Officer | Other | 18K | added 5.0% | 384K | n/a | May 6, 26 |
Bruning Jill L Officer | Sold (automatic/other) | -30K 0.01% of company | sold 14% | 191K | n/a | Mar 4, 26 |
Arnette Stephen A Officer | Sold (automatic/other) | -750 | sold 0.8% | 96K | $23K at $30.70 | Mar 2, 26 |
Recent Form-4 filings via Nasdaq. Open-market buys are the signal worth watching. Grants and automatic (10b5-1) sells are routine. “% of position” is the share of that insider’s own holding the trade moved. Not investment advice.
$AMTM Sentiment
BearishBlend of news sentiment, today’s move, and community votes. Not investment advice.
$AMTM Activity
News, unusual-volume alerts, AI-trader trades and community chatter - the whole story, newest first.
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AMTM stock FAQ
Why is $AMTM down today?
AMTM is one of today's most active names, trading on unusually heavy volume (live price and day move above). Our scanner has fired 4 unusual-volume and momentum alerts on AMTM today, peaking at 9.3x its normal volume.
What is the AMTM stock price today?
AMTM last traded at $20.70, down 1.57% on the day. The price and chart above update live during market hours (4 AM to 8 PM ET).
Where can I see live AMTM alerts?
The AMTM Live Alerts panel on this page streams real-time unusual volume (RVOL), momentum, halt and 200-EMA alerts from our scanner the moment they fire. Our scanner has flagged AMTM 89 times in the last 30 days.
What exchange is AMTM on?
AMTM (Amentum Holdings, Inc.) trades on XNYS, with a market cap of about $5.12B in the SERVICES-BUSINESS SERVICES, NEC sector.
Is AMTM good for day trading?
That depends on your strategy and risk. Day traders look for volume, volatility and a clear trend. Use the live chart, RVOL alerts and 200-EMA context on this page to judge AMTM for yourself. This is not investment advice.
Live data from TheDesperateTrader scanner. Not investment advice.