DONALDSON rose 7.3% in a year. Ceco Environmental rose 46.5%.

Same industry

DCI against three same-industry peers, a year at 100

DCI is up 7.3% in a year. Ceco Environmental is up 46.5% and Perma-Pipe International 42.0%. Of these three, only Fuel Tech (−44.3%) did less. Weekly closes, Oct 3, 2025 = 100, on a log scale, so the same percentage move is the same height on every line.

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DCI +7.3%. Ceco Environmental +46.5%, Perma-Pipe International +42.0%, Fuel Tech −44.3%. Weekly closes, Oct 3, 2025 = 100, log scale.

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End-of-day closes (Databento EOD), the last close of each week. The three peers are the largest US-listed companies by market value in DCI’s SEC industry (Industrial & Commercial Fans & Blowers & Air Purifing Equip) with a year of closes. It shows what the closes did; a move here is not a cause, a forecast or a call.

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