Waste Management Inc. (NYSE: WM) closed at $214.00 on Wednesday, Sept. 16, 2026, down 1.50% on the session — a steeper decline than the broader market and its listed competitors in the environmental services space.

It was the second consecutive day of losses for the stock, according to MarketWatch's automated company close update.

The broader tape also finished lower, but by less. The S&P 500 fell 0.45% to 7,551.81, and the Dow Jones Industrial Average dropped 1.21% to 51,461.90.

Referenced peers in the same trading session showed smaller losses: Republic Services (RSG) slipped 0.47%, Clean Harbors (CLH) lost 0.50%, and Ecolab (ECL) gave up 0.84%. WM's 1.50% decline placed it at the back of that group on a day when the entire waste and environmental services cohort traded down alongside the market.

The move leaves the largest U.S. hauler underperforming the sector benchmark names investors most often track against it — Republic Services on the collection and landfill side, Clean Harbors on hazardous waste, and Ecolab in industrial services and water treatment.

For readers tracking the material stream rather than the ticker alone, the session is a reminder that even the sector's largest vertically integrated collection, landfill and recycling operator trades with the equity market's rhythm: WM shed more ground than peers on a down day for the S&P 500 and the Dow.

No company-specific news accompanied the decline in the MarketWatch data note; the session was, in the wire's characterization, "an all-around poor trading session for the stock market."

What happens next: whether WM holds the $214 level or extends its losing streak to a third session will show up in Thursday's close, with sector watchers comparing the hauler's trajectory against RSG, CLH and ECL as the reference group.