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MDU · Mdu Resources Group Inc · Holdings

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Market Cap
$3.90B
Shares
210.35M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 438
Total Value: $4,117,326,228
Total Shares: 194,121,949
Showing 1–100 of 438 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 438 13F filers · Δ vs Mar 31, 2026
Top Holder
14.1%
Sep 2023 → Jun 2026 · range 12.9% – 16.3%
+0.7 pts
Top 5
37.7%
Sep 2023 → Jun 2026 · range 37.7% – 45.1%
+0.1 pts
Top 10
54.3%
Sep 2023 → Jun 2026 · range 54.3% – 58.6%
+0.1 pts
HHI
434
Sep 2023 → Jun 2026 · range 424 – 602
Broadly held+10

Quarterly Activity

vs Mar 31, 2026
New
66
Increased
157
Decreased
125
Sold Out
51
Unchanged
90
Holder count: +15
Institutional value: +3.7%
Shares held: +1.3%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 438
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 67716 CUSIP 552690109 13F (30d) 9 filings 8 filers Visit website Investor relations