Westport Fuel Systems fell 19.3% in a year. Cummins rose 22.1%.

Same industry

WPRT against four same-industry peers, a year at 100

WPRT is down 19.3% in a year. Cummins is up 22.1% and Brunswick is down 1.4%. Of these four, BWX Technologies (−27.7%) and Power Solutions International (−51.4%) 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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WPRT −19.3%. Cummins +22.1%, Brunswick −1.4%, BWX Technologies −27.7%, Power Solutions International −51.4%. 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 four peers are the largest US-listed companies by market value in WPRT’s SEC industry (Engines & Turbines) 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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