#1

MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

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MDU Resources Group, Inc.

#19

MDU Resources Group, Inc.