Mark Steven Bender is an EVP & CFO who has filed 105 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for WLK, was dated May 14, 2026. Across all open-market trades the lifetime net is −$36.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $3.5M 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.