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Feb 14, 2022 04:22PM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: BlueSpruce Investments, LP
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Feb 12, 2021 08:48AM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: BlueSpruce Investments, LP
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Jan 29, 2021 06:02AM
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Feb 14, 2020 04:30PM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: WADDELL & REED FINANCIAL INC
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Feb 12, 2019 05:09PM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
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Feb 13, 2018 04:26PM Form SC 13G ASPEN TECHNOLOGY INC Filed by: KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC
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Feb 3, 2017 07:55AM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: Artisan Partners Limited Partnership
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Feb 13, 2015 04:05PM Form SC 13G/A ASPEN TECHNOLOGY INC Filed by: WADDELL & REED FINANCIAL INC
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