Greenhouse 100 Suppliers Index (2025 Report, Based on 2023 Data)
Sorted by: Greenhouse 100 Suppliers Rank, then by 2023 Emissions from Fossil Fuel Supplies (CO2 Metric Tons) descending
Greenhouse 100 Suppliers Rank Parent Corporation or Entity 2023 Emissions from Fossil Fuel Supplies (CO2 Metric Tons) Percentage of 2023 U.S.Greenhouse Gas Emissions From Supplies % of Supplier CO2 from a Single Facility Industrial Sectors
1 Marathon Petroleum 401,238,644 8.2% 23% Petroleum Refineries, Natural Gas Extraction, Other
2 Phillips 66 301,539,852 6.2% 16% Petroleum Refineries, Natural Gas Extraction
3 Exxon Mobil 297,444,803 6.1% 28% Petroleum Refineries, Crude Petroleum Extraction, Natural Gas Extraction, Other
4 Valero Energy 273,300,388 5.6% 17% Petroleum Refineries, Petroleum Wholesalers, Ethyl Alcohol Manufacturing
5 Core Natural Resources Inc. 191,008,348 3.9% 54% Coal Mining
6 Peabody Energy 183,578,991 3.8% 57% Coal Mining
7 Chevron 144,034,247 2.9% 34% Petroleum Refineries
8 Enterprise Products Partners 127,960,453 2.6% 15% Natural Gas Extraction, Other
9 PDVSA (Petroleos de Venezuela S.A.) 111,538,976 2.3% 58% Petroleum Refineries, Petroleum Wholesalers
10 PBF Energy 106,531,497 2.2% 21% Petroleum Refineries, Other
11 Koch Industries 100,254,263 2.0% 51% Petroleum Refineries, Petroleum Wholesalers, Other, Nitrogenous Fertilizer Manufacturing
12 BP 98,724,627 2.0% 67% Petroleum Refineries, Other
13 Saudi Arabian Oil Company (Saudi Aramco) 91,983,868 1.9% 100% Petroleum Refineries, Petroleum Wholesalers, Other
14 Oneok 89,025,251 1.8% 32% Natural Gas Extraction, Petroleum Refineries
15 HF Sinclair Corporation 85,235,525 1.7% 22% Petroleum Refineries
16 Energy Transfer 84,245,234 1.7% 33% Pipeline Transportation of Natural Gas, Natural Gas Extraction, Petroleum Wholesalers, Other
17 Delek 80,792,310 1.7% 61% Petroleum Refineries
18 Navajo Transitional Energy Company LLC 77,659,748 1.6% 42% Coal Mining
19 Alliance Resource Partners 75,675,771 1.5% 28% Coal Mining
20 Targa Resources 65,754,306 1.3% 97% Natural Gas Extraction, Pipeline Transportation of Natural Gas, Other
21 American Consolidated Natural Resources Inc. 64,287,269 1.3% 25% Coal Mining
22 Petri E Koivula; David Michael Jamison 54,404,076 1.1% 51% Coal Mining
23 NiSource 47,520,631 1.0% 41% Natural Gas Distribution
24 Sempra Energy 45,045,782 0.9% 89% Natural Gas Distribution
25 Kinder Morgan 42,592,686 0.9% 37% Petroleum Refineries, Natural Gas Distribution, Natural Gas Extraction
26 Southern Company 42,256,347 0.9% 57% Natural Gas Distribution
27 PG&E Corp. 42,218,961 0.9% 100% Natural Gas Distribution
28 Dominion Energy 41,430,319 0.8% 44% Natural Gas Distribution
29 Petroleos Mexicanos (Pemex) 37,843,616 0.8% 100% Petroleum Refineries
30 Cenovus Energy 37,812,217 0.8% 58% Petroleum Refineries
31 LyondellBasell Industries 37,741,956 0.8% 100% Petroleum Refineries, Other
32 MPLX LP 37,303,523 0.8% 63% Natural Gas Extraction, Pipeline Transportation of Natural Gas
33 WEC Energy Group 36,209,731 0.7% 29% Natural Gas Distribution
34 Duke Energy 35,945,060 0.7% 73% Natural Gas Distribution
35 Foresight Energy 35,373,791 0.7% 43% Coal Mining
36 Alpha Metallurgical Resources 35,177,906 0.7% 15% Coal Mining
37 National Grid 34,747,870 0.7% 28% Natural Gas Distribution, Other
38 CenterPoint Energy 34,120,281 0.7% 29% Natural Gas Distribution
39 NACCO Industries 30,129,988 0.6% 48% Coal Mining
40 Williams Companies 28,800,395 0.6% 28% Natural Gas Extraction, Crude Petroleum Extraction
41 Shell PLC 28,608,760 0.6% 100% Petroleum Refineries, Petroleum Wholesalers, Other
42 Par Pacific Holdings 28,356,123 0.6% 43% Petroleum Refineries
43 Icahn Enterprises 28,290,302 0.6% 67% Petroleum Refineries, Nitrogenous Fertilizer Manufacturing
44 CHS Inc. 27,502,741 0.6% 67% Petroleum Refineries, Petroleum Wholesalers
45 Delta Air Lines 24,570,331 0.5% 100% Petroleum Refineries
46 Atmos Energy 24,128,364 0.5% 53% Natural Gas Distribution
47 Xcel Energy 22,208,394 0.5% 64% Natural Gas Distribution
48 TotalEnergies SE 21,288,969 0.4% 100% Petroleum Refineries, Petroleum Wholesalers, Other
49 Kiewit 21,170,673 0.4% 100% Coal Mining
50 UGI Corp. 21,068,529 0.4% 86% Natural Gas Distribution
51 Sev.en Energy 20,611,405 0.4% 15% Coal Mining
52 CMS Energy 20,528,146 0.4% 100% Natural Gas Distribution
53 ONE Gas Inc. 19,754,493 0.4% 55% Natural Gas Distribution
54 Consolidated Edison 19,248,450 0.4% 94% Natural Gas Distribution
55 Black Hills Corp. 19,177,885 0.4% 33% Natural Gas Distribution, Coal Mining
56 Berkshire Hathaway 18,807,154 0.4% 40% Natural Gas Distribution, Coal Mining, Petroleum Refineries, Natural Gas Extraction, Petroleum Wholesalers, Other
57 MDU Resources 16,874,598 41% Natural Gas Distribution
58 DTE Energy 16,835,994 99% Natural Gas Distribution
59 Spire Inc. 16,687,849 33% Natural Gas Distribution
60 Public Service Enterprise 16,668,932 100% Natural Gas Distribution
61 Warrior Met Coal 16,589,055 67% Coal Mining
62 Global Mining Group LLC 16,449,026 100% Coal Mining
63 Westmoreland Mining LLC 15,350,201 78% Coal Mining
64 Emera 14,765,122 68% Natural Gas Distribution
65 Prairie State Energy Campus (facility) 14,562,863 100% Coal Mining
66 Hallador Energy 14,428,673 59% Coal Mining
67 Energy and Minerals Group 13,748,620 63% Coal Mining
68 TRANSWORLD OIL USA INC 13,055,974 100% Petroleum Refineries
69 Iron Senergy Holding, LLC 12,875,660 100% Coal Mining
70 Ares Management 12,396,302 71% Natural Gas Extraction
71 Hunt Consolidated 12,374,759 89% Petroleum Refineries
72 AltaGas 12,254,318 36% Natural Gas Distribution, Other
73 Vistra Energy 12,171,878 100% Coal Mining
74 J Clifford Forrest III 12,166,497 11% Coal Mining
75 Trafigura Group 11,883,939 51% Coal Mining
76 Alliant Energy 11,662,218 52% Natural Gas Distribution
77 Vertex Energy 11,434,301 100% Petroleum Refineries
78 Southwest Gas 11,399,093 56% Natural Gas Distribution
79 Exelon 11,002,016 41% Natural Gas Distribution
80 CBR Investments 10,476,209 90% Coal Mining
81 Calumet Specialty Products 10,399,045 53% Petroleum Refineries
82 JPMorgan Chase 10,249,917 32% Natural Gas Distribution
83 Red Apple Group 10,146,173 100% Petroleum Refineries
84 Iberdrola 9,849,008 29% Natural Gas Distribution, Other
85 Suncor Energy 9,808,177 100% Petroleum Refineries
86 Ameren 9,800,756 89% Natural Gas Distribution
87 Petro-Hunt 9,514,929 97% Petroleum Refineries, Natural Gas Extraction
88 EverSource Energy 9,375,030 38% Natural Gas Distribution
89 IFM Investors 8,355,323 100% Petroleum Refineries
90 Essential Utilities Inc. 7,489,263 93% Natural Gas Distribution
91 National Fuel Gas 7,149,817 67% Natural Gas Distribution, Natural Gas Extraction
92 Western Fuels Association 7,123,359 100% Coal Mining
93 Ramaco Resources 6,861,247 19% Coal Mining
94 Ergon 6,705,067 57% Petroleum Refineries
95 Northwest Natural Holding Co 6,653,514 92% Natural Gas Distribution
96 John Mitch Potter 6,558,037 44% Coal Mining
97 Daniel W Bunn 6,537,421 28% Coal Mining
98 Aux Sable Companies 6,491,331 100% Natural Gas Extraction
99 Puget Sound Energy 5,748,212 100% Natural Gas Distribution
100 Occidental Petroleum 5,742,462 44% Crude Petroleum Extraction, Coal Mining, Natural Gas Extraction
The Greenhouse 100 Suppliers Index ranks companies by their supply of products that result in greenhouse gas emissions when the products are released, combusted, or oxidized.
Explanatory notes (For details, see the technical notes )
This edition of the Greenhouse 100 Suppliers ranks companies by C02-equivalent greenhouse gas emissions from their supply of products in 2023 that result in GHG emissions when the products are released, combusted, or oxidized. This differs from the Greenhouse 100 Polluters because the Greenhouse 100 Polluters ranks companies by direct emissions of GHGs from large facilities. It includes both data from EPA's GHGRP Suppliers database and a PERI database of coal mines based on EIA and MSHA data. Petroleum exports are not included as supplier amounts (we assume that they were also reported as production if they were produced in the US.)
Important: EPA treats some quantities of CO2 released from suppliers as confidential where the supplying facility makes only one product and its amount of production could be calculated from its CO2 emissions. PERI has no way to determine the values of these confidential amounts and has treated them as zeroes. Users of this list should be aware that data derived from EPA's GHGRP Suppliers database are a lower bound and may actually be larger than shown.
The links from each parent name or state lead to an application that gives detailed facility information. You can also search for companies not on the Greenhouse 100 Suppliers Index . For more information on the data, see the technical notes .
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