Mdu Resources Group Inc (MDU)

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Institutional Investors' Holdings

Filing Period: Filing is Ongoing

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	27,351,603	$580,127,492	0.01%
2.	State Street Corp	7,376,161	$157,443,621	0%
3.	River Road Asset Management, Llc	3,403,955	$72,197,886	0.8%
4.	Bank Of New York Mellon Corp	2,330,719	$49,434,555	0.01%
5.	New York State Common Retirement Fund	1,404,875	$29,797,399	0.04%