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FORTALEZA ASSET MANAGEMENT INC > AZPN

DateNameTickerSharesChangeValueChangePrice
06/30/2018ASPEN TECHNOLOGY INCAZPN115-1,10511,000-85,000$95.65
03/31/2018ASPEN TECHNOLOGY INCAZPN1,220096,00015,000$78.69
12/31/2017ASPEN TECHNOLOGY INCAZPN1,220081,0004,000$66.39
09/30/2017ASPEN TECHNOLOGY INCAZPN1,220077,00010,000$63.11
06/30/2017ASPEN TECHNOLOGY INCAZPN1,220-2,39567,000-146,000$54.92
03/31/2017ASPEN TECHNOLOGY INCAZPN3,6150213,00015,000$58.92
12/31/2016ASPEN TECHNOLOGY INCAZPN3,615150198,000-161,929,000$54.77
09/30/2016ASPEN TECHNOLOGY INCAZPN3,4651,835162,127,000162,061,000$46,789.90
06/30/2016ASPEN TECHNOLOGY INCAZPN1,630-23,51866,000-803,000$40.49
03/31/2016ASPEN TECHNOLOGY INCAZPN2,470-22,67889,241,00088,372,000$36,129.96
12/31/2015ASPEN TECHNOLOGY INCAZPN2,470-22,67893,000-776,000$37.65
09/30/2015ASPEN TECHNOLOGY INCAZPN8,730-16,418331,000-538,000$37.92
06/30/2015ASPEN TECHNOLOGY INCAZPN11,900-13,248542,000-327,000$45.55
12/31/2014ASPEN TECHNOLOGY INCAZPN0-19,7900-746,000 
09/30/2014ASPEN TECHNOLOGY INCAZPN19,790-5,358746,000-123,000$37.70
06/30/2014ASPEN TECHNOLOGY INCAZPN20,040-5,108930,00061,000$46.41
03/31/2014ASPEN TECHNOLOGY INCAZPN15,975-9,173677,000-192,000$42.38
12/31/2013ASPEN TECHNOLOGY INCAZPN24,420-7281,021,000152,000$41.81
09/30/2013ASPEN TECHNOLOGY INCAZPN25,14825,148869,000869,000$34.56
06/30/2013ASPEN TECHNOLOGY INCAZPN25,0302,500721,000-6,000$28.81
03/31/2013ASPEN TECHNOLOGY INCAZPN22,530385727,000115,000$32.27
12/31/2012ASPEN TECHNOLOGY INCAZPN22,145-1,480612,0002,000$27.64
09/30/2012ASPEN TECHNOLOGY INCAZPN23,6250610,00063,000$25.82
06/30/2012ASPEN TECHNOLOGY INCAZPN23,6250547,00062,000$23.15
03/31/2012ASPEN TECHNOLOGY INCAZPN23,625120485,00077,000$20.53
12/31/2011ASPEN TECHNOLOGY INCAZPN23,50523,505408,000408,000$17.36
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