Natural Alternatives International (NAII) Stock Chart & Stock Price History $3.95 -0.01 (-0.23%) As of 08/22/2025 04:00 PM Eastern This is a fair market value price provided by Polygon.io. Learn more. Add Compare Share Share Chart Stock AnalysisChartCompetitorsEarningsHeadlinesOwnershipSEC FilingsShort InterestTrendsBuy This Stock Natural Alternatives International Stock Price Performance The Natural Alternatives International (NAII) stock chart highlights key performance trends across multiple timeframes. Over the last 12 months, the stock's price has decreased 23.85%, with a year-to-date return of -7.77%. In the past month, the stock has increased 8.90%, reflecting recent market activity. As of the latest close, Natural Alternatives International traded at $3.98 with a market cap of $24.57 million and volume of 1,379 shares. Five years ago, the stock traded at $7.85, representing a 49.36% decrease over that period. At the time, it had a market cap of $52.27 million and a volume of 14,094 shares. Receive NAII Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Natural Alternatives International and its competitors with MarketBeat's FREE daily newsletter. Email Address 5 Day Performance+3.25%1 Month Performance+8.90%3 Month Performance+18.66%Year-To-Date Performance-7.77%1 Year Performance-23.85%5 Year Performance-49.36% NAII Stock Chart for Sunday, August, 24, 2025 NAII Chart by TradingView Natural Alternatives International 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 Capitalization08/22/2025$3.98$3.98-0.03%$4.03$3.961,379 shs$24.57 million08/21/2025$4.00$3.98-0.60%$3.96$3.861,528 shs$24.57 million08/20/2025$3.85$4.00+3.90%$4.00$3.858,072 shs$24.72 million08/19/2025$3.88$3.85-0.65%$3.87$3.85955 shs$23.79 million08/18/2025$3.84$3.88+0.91%$3.88$3.852,363 shs$23.94 million08/15/2025$3.77$3.84+1.86%$3.87$3.805,915 shs$23.73 million08/14/2025$3.77$3.77$3.77$3.77279 shs$23.29 million08/13/2025$3.80$3.77-0.66%$3.90$3.773,411 shs$23.30 million08/12/2025$3.70$3.80+2.71%$3.82$3.73461 shs$23.45 million08/11/2025$3.70$3.70-0.14%$3.83$3.628,985 shs$22.83 million Get the Latest News and Ratings for NAII and Related StocksEnter your email address below to receive the latest news and analysts' ratings for Natural Alternatives International and its competitors with MarketBeat's FREE daily newsletter. 08/08/2025$3.70$3.70$3.70$3.641,992 shs$22.86 million08/07/2025$3.66$3.70+1.09%$3.77$3.70820 shs$22.87 million08/06/2025$3.65$3.66+0.16%$3.77$3.661,543 shs$22.62 million08/05/2025$3.71$3.65-1.51%$3.68$3.612,393 shs$22.58 million08/04/2025$3.74$3.71-0.78%$3.73$3.612,623 shs$22.93 million08/01/2025$3.75$3.74-0.16%$3.62$3.61484 shs$23.11 million07/31/2025$3.74$3.75+0.13%$3.80$3.631,492 shs$23.14 million07/30/2025$3.70$3.74+1.08%$3.80$3.624,380 shs$23.11 million07/29/2025$3.65$3.70+1.51%$3.80$3.616,608 shs$22.87 million07/28/2025$3.63$3.65+0.39%$3.60$3.60564 shs$22.53 million07/25/2025$3.65$3.63-0.52%$3.66$3.581,682 shs$22.44 million07/24/2025$3.65$3.65$3.65$3.531,837 shs$22.55 million07/23/2025$3.47$3.65+5.19%$3.67$3.473,931 shs$22.56 million Related Companies TScan Therapeutics Stock Chart Adagene Stock Chart Cardiol Therapeutics Stock Chart Surrozen Stock Chart Alto Neuroscience Stock Chart Pliant Therapeutics Stock Chart ESSA Pharma Stock Chart Oncobiologics Stock Chart Milestone Pharmaceuticals Stock Chart Immunic Stock Chart Receive NAII Stock News and Ratings via EmailSign-up to receive the latest news and ratings for Natural Alternatives International and its competitors with MarketBeat's FREE daily newsletter. 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