Defence (ALRT) Stock Chart & Stock Price History GBX 0.53 +0.06 (+11.58%) As of 12:38 PM Eastern Add Share Share Chart Stock AnalysisChartEarningsBuy This Stock Defence Stock Price Performance The Defence (ALRT) stock chart highlights key performance trends across multiple timeframes. In the past month, the stock has increased 9.50%, reflecting recent market activity. As of the latest close, Defence traded at GBX 0.47 with a market cap of and volume of 73.04 million shares. Receive ALRT Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Defence and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+28.33%1 Month Performance+9.50% ALRT Stock Chart for Friday, August, 22, 2025 ALRT Chart by TradingView Defence Stock Price History Daily Weekly Monthly Yearly Time Frame Custom Range 1 Month 3 Months 6 Months Year-to-Date 1 Year 3 Year 5 Year Time Frame Start Date End Date Export to Excel DateOpening PriceClosing PriceHighLowVolumeMarket Capitalization08/21/2025GBX 0.47GBX 0.47GBX 0.50GBX 0.4573.04 million shs£0.0008/20/2025GBX 0.50GBX 0.47-6.20%GBX 0.49GBX 0.46135.76 million shs£0.0008/19/2025GBX 0.45GBX 0.50+12.36%GBX 0.52GBX 0.46201.14 million shs£0.0008/18/2025GBX 0.41GBX 0.45+7.75%GBX 0.45GBX 0.4264.35 million shs£0.0008/15/2025GBX 0.42GBX 0.41-1.67%GBX 0.43GBX 0.3981.59 million shs£0.0008/14/2025GBX 0.40GBX 0.42+6.06%GBX 0.45GBX 0.40145.88 million shs£0.0008/13/2025GBX 0.40GBX 0.40-1.00%GBX 0.43GBX 0.3876.94 million shs£0.0008/12/2025GBX 0.39GBX 0.40+3.09%GBX 0.41GBX 0.39123.35 million shs£0.0008/11/2025GBX 0.38GBX 0.39+2.92%GBX 0.44GBX 0.38124.06 million shs£0.0008/08/2025GBX 0.39GBX 0.38-3.08%GBX 0.39GBX 0.3642.36 million shs£0.00 Get the Latest News and Ratings for ALRT and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Defence and its competitors with MarketBeat's FREE daily newsletter. 08/07/2025GBX 0.39GBX 0.39-0.26%GBX 0.40GBX 0.3537.88 million shs£0.0008/06/2025GBX 0.39GBX 0.39GBX 0.40GBX 0.35110.24 million shs£0.0008/05/2025GBX 0.37GBX 0.39+5.41%GBX 0.39GBX 0.3590.84 million shs£0.0008/04/2025GBX 0.36GBX 0.37+3.35%GBX 0.37GBX 0.34111.58 million shs£0.0008/01/2025GBX 0.35GBX 0.36+1.42%GBX 0.36GBX 0.34109.92 million shs£0.0007/31/2025GBX 0.38GBX 0.35-5.87%GBX 0.39GBX 0.3594.01 million shs£0.0007/30/2025GBX 0.37GBX 0.38+1.35%GBX 0.38GBX 0.3784.57 million shs£0.0007/29/2025GBX 0.39GBX 0.37-3.90%GBX 0.40GBX 0.3728.12 million shs£0.0007/28/2025GBX 0.39GBX 0.39-1.79%GBX 0.45GBX 0.3837.48 million shs£0.0007/25/2025GBX 0.40GBX 0.39-1.26%GBX 0.42GBX 0.398.99 million shs£0.0007/24/2025GBX 0.43GBX 0.40-7.67%GBX 0.45GBX 0.396.22 million shs£0.0007/23/2025GBX 0.48GBX 0.43-11.16%GBX 0.44GBX 0.408.29 million shs£0.0007/22/2025GBX 0.46GBX 0.48+5.45%GBX 0.50GBX 0.4016.50 million shs£0.0007/21/2025N/AGBX 0.46GBX 0.50GBX 0.4335.27 million shs£0.00 This page (LON:ALRT) was last updated on 8/22/2025 by MarketBeat.com Staff From Our PartnersWhat Steve Bannon revealed about Trump’s gold playA Trump advisor just said 3 words that could reset the dollar. 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