Amgen announces Phase 3 DLL3-therapy study met primary endpoint as stock falls 7.5%

Amgen announces Phase 3 DLL3-therapy study met primary endpoint as stock falls 7.5%
Amgen stock falls 7.5% to $404.01

Amgen announced on August 21, 2026, that a Phase 3 trial evaluating its DLL3-targeting therapy as part of first-line maintenance for extensive-stage small cell lung cancer met its primary endpoint. Shares are down 7.5% on the day at $404.01.

AMGN price prediction
24H -0.52%
$410.77
48H -0.66%
$410.16
7D -1%
$408.79
1M 6.34%
$439.07
3M 20.26%
$496.54
6M 37.44%
$567.47
12M 56.09%
$644.49
Current price: $412.9 -4.6750 1.12%
Closed 10/13
Daily range 411.17 Arrow from to Icon 418.44
Weekly range 400.34 Arrow from to Icon 417.78
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Highlights

  • Amgen announced its Phase 3 trial of IMDELLTRA with IMFINZI for extensive-stage small cell lung cancer met its primary survival endpoint.
  • Shares are down 7.5% on the day at $404.01.
  • Of 137 analysts covering the stock, 56 rate Amgen a buy and 13 recommend selling.

Amgen announced August 21, 2026, that a Phase 3 study evaluating its DLL3-targeting therapy IMDELLTRA in combination with IMFINZI as first-line maintenance for extensive-stage small cell lung cancer met its primary endpoint. The main study result was a landmark improvement in overall survival, according to PR Newswire. The combination of PD-L1 checkpoint inhibition with DLL3-directed T-cell engagement provided two distinct immunotherapy approaches in the DeLLphi-305 Phase 3 trial, according to Oncodaily.

Split structure as price slips below MA-20 after trial results

Price lost the MA-20 at $431.41 during the session after closing above it. The daily chart now shows a split structure, with shares holding above the MA-50 and MA-200 but sitting below the MA-20. The nearest support is at the MA-50, which is $397.04. RSI at 61.9 is nearing overbought territory, which is an early sign the advance is getting stretched.

Upside odds lead as traders watch for a close above $411.5

To see if the recent developments are being priced in, traders should watch for a close above $411.5 to indicate follow-through from buyers. During the latest session, price moved below the MA-20 at $431.41 after previously closing above that level. Although the past week was marked by a sustained move lower with a firm trend, from here the 5-day upside probability stands at 70%, while downside risk is 30%, with the expected trading range at $399.83 to $408.18. A drop below $397.04 would show the move is being faded. On the weekly chart, the longer-term picture stays firmly constructive.

Earlier, analysts noted that Amgen maintained a bullish technical outlook supported by strong fundamentals and positive momentum signals. With shares now trading beneath the MA-20 despite a major clinical milestone, traders should monitor whether price can reclaim $411.5 as confirmation of renewed buying interest.

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