CLH · PEAD → 0

Clean Harbors reported Q2 2026 EPS of $3.22 on 2026-07-29, beating the $2.74 consensus by $0.48 (+17.5%); prior-year EPS comparison is not available in our feed.

Print-day reaction was a sharp +7.5% versus the prior close, as the significant EPS beat drove the stock well above its pre-earnings range. The overnight gap into T+1 open was a modest +0.2%, indicating the market held its initial enthusiasm without any meaningful fade after-hours. Over the following two trading days, however, the price drifted –1.9%, giving back a notable portion of the opening surge. Cumulative abnormal return of +0.14% versus SPY.US sits well inside the ±3% PEAD threshold, yielding a none verdict; no drift signal is confirmed through the holding window ending 2026-10-26.