
Source: Courtesy of Westlake Chemical Corporation
40. Westlake Chemical
> U.S. pre-tax income: $227 million
> Federal income tax (including rebates): -$208 million
> Effective tax rate: -91.6%
> Industry: Chemicals
39. Cabot Oil & Gas
> U.S. pre-tax income: $240 million
> Federal income tax (including rebates): -$32 million
> Effective tax rate: -13.2%
> Industry: Oil, gas and pipelines

Source: Public Domain / Wikimedia Commons
38. Dexcom
> U.S. pre-tax income: $265 million
> Federal income tax (including rebates): $0
> Effective tax rate: 0.0%
> Industry: Pharmaceuticals and medical products
36. Textron
> U.S. pre-tax income: $278 million
> Federal income tax (including rebates): -$1 million
> Effective tax rate: -0.4%
> Industry: Aerospace and defense

Source: Public Domain / Wikimedia Commons
36. Williams
> U.S. pre-tax income: $278 million
> Federal income tax (including rebates): -$29 million
> Effective tax rate: -10.4%
> Industry: Oil, gas and pipelines
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