Siga Technologies (SIGA) Stock Chart & Stock Price History $8.54 -0.10 (-1.10%) As of 12:12 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisChartCompetitorsDividendEarningsFinancialsHeadlinesOptions ChainOwnershipSEC FilingsShort InterestTrendsBuy This Stock Siga Technologies Stock Price Performance The Siga Technologies (SIGA) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has increased 10.56%, with a year-to-date return of 42.01%. In the past month, the stock has increased 32.12%, reflecting recent market activity. As of the latest close, Siga Technologies traded at $8.63 with a market cap of $617.99 million and volume of 819,633 shares. Five years ago, the stock traded at $6.80, representing a 25.51% increase over that period. At the time, it had a market cap of $531.22 million and a volume of 256,684 shares. 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Read our full terms of service and privacy policy. 5 Day Performance+1.73%1 Month Performance+32.12%3 Month Performance+37.66%Year-To-Date Performance+42.01%1 Year Performance+10.56%5 Year Performance+25.51% SIGA Stock Chart for Wednesday, September, 3, 2025 SIGA Chart by TradingView Siga Technologies 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 Capitalization09/02/2025$8.39$8.63+2.86%$8.82$8.39819,633 shs$617.99 million09/01/2025$8.39$8.39$8.39$8.23354,801 shs$600.77 million08/29/2025$8.21$8.39+2.19%$8.39$8.23354,801 shs$600.77 million08/28/2025$8.25$8.21-0.48%$8.38$8.19324,065 shs$587.92 million08/27/2025$8.49$8.25-2.83%$8.47$8.20440,025 shs$590.78 million08/26/2025$8.70$8.49-2.41%$8.73$8.37555,971 shs$607.94 million08/25/2025$9.13$8.70-4.71%$9.20$8.66429,629 shs$623.01 million08/22/2025$8.75$9.13+4.34%$9.13$8.64861,154 shs$653.80 million08/21/2025$8.78$8.75-0.34%$8.91$8.69471,392 shs$626.59 million08/20/2025$8.77$8.78+0.11%$8.89$8.69364,776 shs$628.70 million Get the Latest News and Ratings for SIGA and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Siga Technologies and its competitors with MarketBeat's FREE daily newsletter. 08/19/2025$8.92$8.77-1.68%$9.14$8.76482,335 shs$628.02 million08/18/2025$8.50$8.92+4.94%$9.08$8.54612,347 shs$638.76 million08/15/2025$8.58$8.50-0.93%$8.62$8.39466,389 shs$608.69 million08/14/2025$8.78$8.58-2.28%$8.75$8.47507,609 shs$614.38 million08/13/2025$9.30$8.78-5.59%$9.36$8.741.02 million shs$628.74 million08/12/2025$9.48$9.30-1.90%$9.52$9.12749,377 shs$665.97 million08/11/2025$8.96$9.48+5.80%$9.62$9.021.42 million shs$678.83 million08/08/2025$8.55$8.96+4.80%$9.11$8.50831,891 shs$641.63 million08/07/2025$7.26$8.55+17.77%$8.77$7.381.35 million shs$610.82 million08/06/2025$6.60$7.26+10.00%$7.80$6.891.35 million shs$518.65 million08/05/2025$6.65$6.60-0.75%$6.69$6.52471,267 shs$471.50 million08/04/2025$6.46$6.65+2.94%$6.66$6.48282,367 shs$475.08 million Related Companies Gemini Therapeutics Stock Price Chart Catalyst Pharmaceuticals Stock Price Chart Alvotech Stock Price Chart Kiniksa Pharmaceuticals International Stock Price Chart Organon & Co. 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