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TransDigm’s $2.2B Expansion into Aerospace Aftermarket Dominance

TransDigm doubles down on aerospace aftermarket, buying Jet Parts Engineering and Victor Sierra Aviation for about $2.2B

What happened

TransDigm ($TDG) says it will buy Jet Parts Engineering and Victor Sierra Aviation from Vance Street Capital for about $2.2B (including tax benefits), expanding further into the high-margin aerospace aftermarket. Reuters says the 2 businesses generated about $280M of revenue in 2025, and TransDigm highlighted that their commercial aftermarket revenue is tied to proprietary alternative parts.

Why it matters for traders

Aftermarket is where aerospace prints…

The skinny

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