Eric Mark Green bought 3,370 shares of Ecolab Inc. (ECL) in the open market on 2026-09-11 at $276.58 per share, a purchase worth about $932,060. An open-market buy is often watched closely by investors because it means the insider chose to put personal capital into the stock at the prevailing market price, rather than receiving shares through compensation or exercising options. Green is listed as an insider but not a senior executive, which can matter because top officers and directors typically have the broadest view of company performance and strategy. Even so, the dollar size of this purchase is notable for a non-executive insider and suggests a meaningful personal commitment. The disclosure also indicates the trade was not made under a pre-scheduled 10b5-1 plan, which can make the timing more discretionary than trades executed automatically under a preset schedule. Over the last 30 days, this is the only reported insider transaction in Ecolab, so there isn’t a broader pattern of multiple insiders buying or selling to compare against. With just one data point, the main takeaway is the size and voluntary nature of the purchase rather than a sustained trend in insider activity.