Exhibit 99.1

ECOLAB INC.

SUPPLEMENTAL REPORTABLE SEGMENT INFORMATION

AND NON-GAAP RECONCILIATION

(unaudited)


Year ended December 31 (millions)	2024				2023
			Fixed				Fixed
			Currency				Currency
	Values at		Rate	Values at	Values at		Rate	Values at
	2024 Rates	Other	Change	2025 Rates	2024 Rates	Other	Change	2025 Rates
Net Sales
Global Water	$7,857.2	($1.2)	($372.6)	$7,483.4	$7,640.5	($1.0)	($355.4)	$7,284.1
Global Institutional & Specialty	5,413.9	726.0	(160.5)	5,979.4	5,014.6	920.7	(155.9)	5,779.4
Global Life Sciences	1,434.1	(724.8)	(38.8)	670.5	1,607.5	(919.7)	(37.0)	650.8
Global Pest Elimination	1,167.8	-	(27.7)	1,140.1	1,070.2	-	(25.9)	1,044.3
Corporate	-	-	-	-	42.7	-	(0.3)	42.4
Subtotal at fixed currency rates	15,873.0	-	(599.6)	15,273.4	15,375.5	-	(574.5)	14,801.0
Effect of foreign currency translation	(131.6)	-	599.6	468.0	(55.3)	-	574.5	519.2
Total reported GAAP net sales	$15,741.4	$ -	$ -	$15,741.4	$15,320.2	$ -	$ -	$15,320.2

Cost of Sales
Global Water	$4,691.2	$2.0	($222.3)	$4,470.9	$4,769.7	$2.4	($223.5)	$4,548.6
Global Institutional & Specialty	2,727.5	490.6	(87.1)	3,131.0	2,727.3	664.6	(91.9)	3,300.0
Global Life Sciences	895.1	(492.7)	(19.8)	382.6	1,026.9	(667.1)	(18.3)	341.5
Global Pest Elimination	655.0	0.1	(15.3)	639.8	595.0	0.1	(14.1)	581.0
Corporate	5.4	-	(0.2)	5.2	63.3	-	(0.3)	63.0
Total at fixed currency rates	$8,974.2	$ -	($344.7)	$8,629.5	$9,182.2	$ -	($348.1)	$8,834.1

Selling, General and Administrative Expenses
Global Water	$1,865.4	$3.1	($63.2)	$1,805.3	$1,748.8	$3.2	($58.6)	$1,693.4
Global Institutional & Specialty	1,503.7	181.2	(38.7)	1,646.2	1,445.5	215.4	(38.0)	1,622.9
Global Life Sciences	391.8	(189.4)	(6.3)	196.1	419.8	(222.9)	(6.5)	190.4
Global Pest Elimination	292.4	5.1	(6.9)	290.6	264.8	4.3	(6.7)	262.4
Corporate	199.3	-	(3.7)	195.6	200.8	-	(3.7)	197.1
Total at fixed currency rates	$4,252.6	$ -	($118.8)	$4,133.8	$4,079.7	$ -	($113.5)	$3,966.2

Special (Gains) and Charges
Corporate	($188.9)	$ -	$0.2	($188.7)	$111.4	$ -	($0.1)	$111.3
Total at fixed currency rates	($188.9)	$ -	$0.2	($188.7)	$111.4	$ -	($0.1)	$111.3


Operating Income
Global Water	$1,300.6	($6.3)	($87.1)	$1,207.2	$1,122.0	($6.6)	($73.3)	$1,042.1
Global Institutional & Specialty	1,182.7	54.2	(34.7)	1,202.2	841.8	40.7	(26.0)	856.5
Global Life Sciences	147.2	(42.7)	(12.7)	91.8	160.8	(29.7)	(12.2)	118.9
Global Pest Elimination	220.4	(5.2)	(5.5)	209.7	210.4	(4.4)	(5.1)	200.9
Corporate	(15.8)	-	3.7	(12.1)	(332.8)	-	3.8	(329.0)
Subtotal at fixed currency rates	2,835.1	-	(136.3)	2,698.8	2,002.2	-	(112.8)	1,889.4
Effect of foreign currency translation	(32.7)	-	136.3	103.6	(9.9)	-	112.8	102.9
Total reported GAAP operating income	$2,802.4	$ -	$ -	$2,802.4	$1,992.3	$ -	$ -	$1,992.3

Notes:

We evaluate the performance of our non-U.S. dollar functional currency international operations based on fixed currency exchange rates, which eliminate the impact of exchange rate fluctuations on our international operations. Fixed currency amounts are updated annually at the beginning of each year based on translation into U.S. dollars at foreign currency exchange rates established by management, with all periods presented using such rates. The "Fixed Currency Rate Change” columns in the table above reflect international operations at fixed currency exchange rates established by management at the beginning of 2025, rather than the 2024 established rates. The difference between the fixed currency exchange rates and the actual currency exchange rates is reported within the "Effect of foreign currency translation" rows in the table above for net sales and operating income.