<p>P.O. Box 643 Phone: 406-827-3523 47 Cox Gulch Road Fax: 406-827-3543 Thompson Falls, MT 59873 Email: [email protected] NYSE: UAMY</p><p>ANTIMONY PRICING</p><p>Pricing of the metal is generally based on the London Metal Exchange average price C.I.F. Rotterdam per metric ton (a metric ton contains 2,204.6 pounds). Antimony oxide contains 83.1% antimony metal and it is typically the preferred product for selling.</p><p>METAL PRICES BULLETIN AVERAGE MONTHLY METAL PRICE PER METRIC TON CIF USA</p><p>Month 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Month</p><p>Jan 5952 4989 6583 14,027 11,850 11,492 9,877 8,543 5,456 7,683 8,609 Jan</p><p>Feb 6228 4839 6661 14,950 11,960 10,803 10,072 7,937 5,374 7,650 Feb</p><p>Mar 6027 4630 6697 16,452 13,051 10,626 10,141 8,234 5,511 8,653 Mar</p><p>Apr 6002 4484 8488 17,879 13,503 10,458 9,866 8,488 5,585 8,945 Apr</p><p>May 6404 4643 9287 16,769 13,917 10,351 9,711 8,616 6,283 8,763 May</p><p>Jun 6663 5038 8860 15,997 13,977 10,183 9,755 8,300 6,504 8,548 Jun</p><p>Jul 6561 5421 9425 14,815 13,531 9,893 9,797 7,824 6,724 7,937 Jul</p><p>Aug 6746 6065 10,114 14,991 12,886 10,086 9,755 7,330 7,176 8,351 Aug</p><p>Sep 6724 6067 11,161 15,454 12,814 10,417 9,659 6,790 7,634 8,460 Sep</p><p>Oct 6645 6471 11,343 15,419 12,911 10,472 9,469 6,462 7,785 8,157 Oct</p><p>Nov 6393 6504 12,098 14,509 12,732 10,340 9,281 6,049 7,584 8,226 Nov</p><p>Dec 5806 6355 13,228 13,062 12,125 9,893 9,039 5,677 7,606 8,510 Dec</p><p>High 6746 6504 13,228 17,879 13,977 11,492 10,141 8,616 7,785 8,945 8,609 High</p><p>Low 5806 4484 6583 13,062 11,850 9,893 9,039 5,677 5,374 7,650 8,609 Low</p><p>Avg 6346 5459 9495 15,360 12,938 10,418 9,702 7,521 6,602 8,324 8,609 Avg</p><p>METAL PRICES AVERAGE MONTHLY METAL PRICE PER METRIC TON ROTTERDAM</p><p>Month 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 Month</p><p>1 Jan 11,530 9,619 7,950 5,291 7,583 8,286 Jan</p><p>Feb 11,750 9,763 8,000 5,368 8,009 Feb</p><p>Mar 10,890 9,738 8,250 5,296 8,677 Mar</p><p>Apr 10,758 9,633 8,419 5,693 8,864 Apr</p><p>May 10,405 9,450 8,625 6,223 8,852 May</p><p>Jun 10,185 9,563 8,625 6,435 8,606 Jun</p><p>Jul 9,722 9,400 7,350 6,435 8,196 Jul</p><p>Aug 10,163 9,600 7,350 6,823 8,320 Aug</p><p>Sep 10,405 9,463 6,361 7,615 8,413 Sep</p><p>Oct 10,405 9,388 6,082 7,740 8,170 Oct</p><p>Nov 10.207 9,388 5,652 7,550 8,131 Nov</p><p>Dec 12,103 10,141 9,050 5,144 7,350 8,182 Dec</p><p>High 11,750 9,763 8,625 7,740 8,864 8,286 High</p><p>Low 9,722 9,050 5,141 5,291 7,583 8,286 Low</p><p>Avg 6395 4500 10,547 9,505 7,317 6,485 8,333 8,286 Avg</p><p>AVERAGE ANTIMONY METAL PRICES</p>