Nathan Mark Gronberg is a VP, Controller & CAO who has filed 13 SEC Form 4 insider transactions across 1 company since 2020. The most recent filing, for MTN, was dated Oct 1, 2025. Across all open-market trades the lifetime net is −$60.2K, making them a net seller over the disclosed history. Current disclosed insider exposure totals $240.4K across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.