EXHIBIT 99.1

The table below specifies the date of the transaction, number of shares, weighted-average purchase price and range of price per share of Common Stock of Ecolab Inc. purchased by each of Cascade Investment, L.L.C. (“Cascade”) and Bill & Melinda Gates Foundation Trust (the “Trust”) during the past 60 days. Each of Cascade and the Trust undertakes to provide upon request by the staff of the Securities and Exchange Commission full information regarding the number of shares purchased at each separate price. All transactions were effected in the market through brokers.

	Number of Shares Acquired				Weighted Average		Range of Price per Share
Date of Transaction	Cascade		Trust		Price per Share		Low		High
August 11, 2022		129,020		129,020		171.3679		170.8500		171.8400
August 11, 2022		20,170		20,170		172.0931		171.8500		172.7700
August 12, 2022		11,704		11,705		172.4366		171.8900		172.8800
August 12, 2022		17,905		17,904		173.3600		172.8900		173.8800
August 12, 2022		6,330		6,330		174.0672		173.8900		174.2500
August 15, 2022		382		383		174.0197		173.7700		174.4500
August 15, 2022		8,483		8,483		175.2866		174.7900		175.7600
August 15, 2022		57,849		57,848		176.3249		175.7700		176.7500
August 15, 2022		238		238		176.7808		176.7700		176.8300
August 16, 2022		62,520		62,520		176.9297		176.3500		177.3400
August 16, 2022		14,407		14,407		177.5468		177.3500		178.0700
August 17, 2022		43,730		43,730		174.5437		173.9600		174.9500
August 17, 2022		22,697		22,697		175.1658		174.9600		175.8500
August 18, 2022		39,480		39,480		175.2146		174.5300		175.5200
August 18, 2022		6,418		6,418		175.6209		175.5300		175.7600
August 19, 2022		17,292		17,293		171.5576		171.0700		172.0600
August 19, 2022		12,929		12,929		172.5446		172.0800		173.0600
August 19, 2022		6,934		6,934		173.5931		173.0900		174.0200
August 19, 2022		100		100		174.2150		174.1800		174.2500