Mdu Resources Group Inc (MDU)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	25,016,766	$417,029,486	0.01%
2.	Vanguard Group Inc	23,298,266	$388,382,094	0.01%
3.	Dimensional Fund Advisors Lp	9,424,524	$157,105,870	0.04%
4.	Barrow Hanley Mewhinney & Strauss Llc	8,779,446	$146,353,365	0.49%
5.	State Street Corp	6,548,697	$110,025,048	0%