Mdu Resources Group Inc (MDU)

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Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Blackrock, Inc.	25,788,314	$436,080,382	0.01%
2.	Vanguard Group Inc	23,405,598	$395,788,663	0.01%
3.	Barrow Hanley Mewhinney & Strauss Llc	8,539,073	$144,395,724	0.52%
4.	Dimensional Fund Advisors Lp	8,450,566	$142,893,899	0.04%
5.	State Street Corp	6,627,737	$112,947,432	0%