Vault-13

MDU RES GROUP INC MDU

COM · Common Stock · CUSIP 552690109 · ISIN US5526901096

377 institutional holders
145,788,699145.8m shares reported held*
71.7% of all shares outstanding*
$4.0bnreported value*

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($9.9m this quarter). Holder counts are more reliable. Shares outstanding: 203.4m as of 2022-10-27, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $27.38. Options: 7 managers hold calls ($3.7m notional), 3 hold puts ($193.0k).

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP — $1.4m52.5k shares
JANE STREET GROUP, LLC — $872.0k31.9k shares
SIMPLEX TRADING, LLC — $598.0k21.9k shares
CITADEL ADVISORS LLC — $427.0k15.6k shares
GROUP ONE TRADING LLC — $263.0k9.6k shares
PEAK6 Investments LLC — $93.0k3.4k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares

Biggest puts

PEAK6 Investments LLC — $161.0k5.9k shares
SIMPLEX TRADING, LLC — $32.0k1.2k shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. — $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BARROW HANLEY MEWHINNEY & STRAUSS LLC 13G · institution -0.4 pts · filed 2026-08-12 6.3% -0.4 pts 13.1m≈ $276.9m 2026-08-12
VANGUARD PORTFOLIO MANAGEMENT LLC 13G · institution new · filed 2026-04-29 6.1% new 12.6m≈ $266.2m 2026-04-29
VANGUARD CAPITAL MANAGEMENT LLC 13G · institution new · filed 2026-04-30 5.3% new 10.8m≈ $228.4m 2026-04-30
DIMENSIONAL FUND ADVISORS LP 13G · institution +0.1 pts · filed 2026-10-08 5.1% +0.1 pts 10.7m≈ $226.5m 2026-10-08

Fell to 5% or below in the last year: VANGUARD GROUP INC (0.0%, 2026-03-27; now reported by VANGUARD PORTFOLIO MANAGEMENT LLC)

Insider purchases and sales in Q3 2022

Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.

None reported in Q3 2022.

Holders, Q3 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 VANGUARD GROUP INC 0.02% of their portfolio Valley Forge, PA 21,677,09421.7m $592.9m $592.9m 0.02% —
2 BlackRock Inc. 0.02% of their portfolio New York, NY 18,170,73518.2m $497.0m $497.0m 0.02% —
3 STATE STREET CORP 0.03% of their portfolio BOSTON, MA 16,831,29116.8m $463.9m $463.9m 0.03% —
4 Corvex Management LP 17.19% of their portfolio NEW YORK, NY 10,147,04110.1m $277.5m $277.5m 17.19% —
5 DIMENSIONAL FUND ADVISORS LP 0.05% of their portfolio AUSTIN, TX 5,105,7065.1m $139.6m $139.6m 0.05% —
6 FRANKLIN RESOURCES INC 0.07% of their portfolio San Mateo, CA 4,408,4704.4m $120.6m $120.6m 0.07% —
7 BARROW HANLEY MEWHINNEY & STRAUSS LLC 0.39% of their portfolio DALLAS, TX 3,520,7673.5m $96.3m $96.3m 0.39% —
8 Bank of New York Mellon Corp 0.02% of their portfolio NEW YORK, NY 3,218,2643.2m $88.0m $88.0m 0.02% —
9 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 2,838,0502.8m $77.6m $77.6m 0.01% —
10 LSV ASSET MANAGEMENT 0.15% of their portfolio CHICAGO, IL 2,354,7952.4m $64.4m $64.4m 0.15% —
11 FMR LLC 0.01% of their portfolio BOSTON, MA 2,113,4902.1m $57.8m $57.8m 0.01% —
12 Electron Capital Partners, LLC 2.67% of their portfolio NEW YORK, NY 2,041,4782.0m $55.8m $55.8m 2.67% —
13 59 North Capital Management, LP 13.70% of their portfolio Houston, TX 1,872,7441.9m $51.2m $51.2m 13.70% —
14 NORGES BANK 0.01% of their portfolio OSLO, Q8 1,858,8151.9m $50.8m $50.8m 0.01% —
15 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio SAN FRANCISCO, CA 1,836,5371.8m $50.2m $50.2m 0.02% —
16 River Road Asset Management, LLC 0.75% of their portfolio LOUISVILLE, KY 1,833,0421.8m $50.1m $50.1m 0.75% —
17 US BANCORP \DE\ 0.10% of their portfolio MINNEAPOLIS, MN 1,756,9291.8m $48.1m $48.1m 0.10% —
18 Invesco Ltd. 0.01% of their portfolio ATLANTA, GA 1,681,7641.7m $46.0m $46.0m 0.01% —
19 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 1,658,7611.7m $45.4m $45.4m 0.01% —
20 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 1,629,3651.6m $44.6m $44.6m 0.01% —
21 DEPRINCE RACE & ZOLLO INC 1.13% of their portfolio Winter Park, FL 1,618,9101.6m $44.3m $44.3m 1.13% —
22 OLD REPUBLIC INTERNATIONAL CORP 1.34% of their portfolio CHICAGO, IL 1,479,5001.5m $40.5m $40.5m 1.34% —
23 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 1,460,4651.5m $39.9m $39.9m 0.01% —
24 FRONTIER CAPITAL MANAGEMENT CO LLC 0.46% of their portfolio Boston, MA 1,424,9241.4m $39.0m $39.0m 0.46% —
25 SCOPIA CAPITAL MANAGEMENT LP 2.67% of their portfolio NEW YORK, NY 979,285979.3k $26.8m $26.8m 2.67% —
26 ProShare Advisors LLC 0.10% of their portfolio BETHESDA, MD 975,563975.6k $26.7m $26.7m 0.10% —
27 FIRST TRUST ADVISORS LP 0.03% of their portfolio Wheaton, IL 890,749890.7k $24.4m $24.4m 0.03% —
28 Mirae Asset Global Investments Co., Ltd. 0.06% of their portfolio SEOUL, M5 850,529850.5k $23.3m $23.3m 0.06% —
29 PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio DES MOINES, IA 792,573792.6k $21.7m $21.7m 0.02% —
30 PZENA INVESTMENT MANAGEMENT LLC 0.11% of their portfolio NEW YORK, NY 781,895781.9k $21.4m $21.4m 0.11% —
31 AMERIPRISE FINANCIAL INC 0.01% of their portfolio MINNEAPOLIS, MN 773,327773.3k $21.2m $21.2m 0.01% —
32 Russell Investments Group, Ltd. 0.04% of their portfolio Seattle, WA 612,046612.0k $16.7m $16.7m 0.04% —
33 RHUMBLINE ADVISERS 0.02% of their portfolio BOSTON, MA 594,902594.9k $16.3m $16.3m 0.02% —
34 Retirement Systems of Alabama 0.07% of their portfolio MONTGOMERY, AL 582,116582.1k $15.9m $15.9m 0.07% —
35 MANAGED ASSET PORTFOLIOS, LLC 2.78% of their portfolio ROCHESTER, MI 573,799573.8k $15.7m $15.7m 2.78% —
36 DAVIDSON INVESTMENT ADVISORS 1.26% of their portfolio GREAT FALLS, MT 548,547548.5k $15.0m $15.0m 1.26% —
37 LOOMIS SAYLES & CO L P 0.03% of their portfolio BOSTON, MA 532,662532.7k $14.6m $14.6m 0.03% —
38 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 530,055530.1k $14.5m $14.5m 0.01% —
39 JPMORGAN CHASE & CO 0.00% of their portfolio NEW YORK, NY 527,387527.4k $14.4m $14.4m 0.00% —
40 NEUBERGER BERMAN GROUP LLC 0.01% of their portfolio NEW YORK, NY 521,564521.6k $14.3m $14.3m 0.01% —
41 Swiss National Bank 0.01% of their portfolio ZURICH, V8 482,190482.2k $13.2m $13.2m 0.01% —
42 AQR CAPITAL MANAGEMENT LLC 0.03% of their portfolio Greenwich, CT 478,387478.4k $13.1m $13.1m 0.03% —
43 California Public Employees Retirement System 0.01% of their portfolio Sacramento, CA 478,263478.3k $13.1m $13.1m 0.01% —
44 MACQUARIE GROUP LTD 0.02% of their portfolio Sydney, NSW 2000, C3 456,362456.4k $12.6m $12.6m 0.02% —
45 BANK OF AMERICA CORP /DE/ 0.00% of their portfolio CHARLOTTE, NC 448,986449.0k $12.3m $12.3m 0.00% —
46 Angeles Investment Advisors, LLC 1.25% of their portfolio SANTA MONICA, CA 441,420441.4k $12.1m $12.1m 1.25% —
47 Legal & General Group Plc 0.00% of their portfolio London, X0 438,115438.1k $12.0m $12.0m 0.00% —
48 JOHN G ULLMAN & ASSOCIATES INC 1.99% of their portfolio CORNING, NY 416,029416.0k $11.4m $11.4m 1.99% —
49 HEARTLAND ADVISORS INC 0.82% of their portfolio MILWAUKEE, WI 402,000402.0k $11.0m $11.0m 0.82% —
50 Assenagon Asset Management S.A. 0.04% of their portfolio SENNINGERBERG, N4 379,485379.5k $10.4m $10.4m 0.04% —
51 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio NEW YORK, NY 375,469375.5k $10.3m $10.3m 0.01% —
52 WELLS FARGO & COMPANY/MN 0.00% of their portfolio SAN FRANCISCO, CA 370,664370.7k $10.1m $10.1m 0.00% —
53 CITADEL ADVISORS LLC 0.01% of their portfolio MIAMI, FL 369,244369.2k $10.1m $10.1m 0.01% —
54 Goodman Financial Corp 3.10% of their portfolio HOUSTON, TX 338,646338.6k $9.3m $9.3m 3.10% —
55 Owl Creek Asset Management, L.P. 0.60% of their portfolio New York, NY 327,262327.3k $9.0m $9.0m 0.60% —
56 M&T Bank Corp 0.04% of their portfolio BUFFALO, NY 321,445321.4k $8.8m $8.8m 0.04% —
57 AMERICAN INTERNATIONAL GROUP, INC. 0.06% of their portfolio New York, NY 320,887320.9k $8.8m $8.8m 0.06% —
58 Point72 Asset Management, L.P. 0.04% of their portfolio STAMFORD, CT 306,800306.8k $8.4m $8.4m 0.04% —
59 ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio NASHVILLE, TN 303,557303.6k $8.3m $8.3m 0.00% —
60 FIRST MANHATTAN CO. LLC. 0.03% of their portfolio NEW YORK, NY 299,409299.4k $8.2m $8.2m 0.03% —
61 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.02% of their portfolio TALLAHASSEE, FL 296,194296.2k $8.1m $8.1m 0.02% —
62 GUGGENHEIM CAPITAL LLC 0.07% of their portfolio CHICAGO, IL 294,340294.3k $8.1m $8.1m 0.07% —
63 CAPTRUST FINANCIAL ADVISORS 0.05% of their portfolio RALEIGH, NC 289,404289.4k $7.9m $7.9m 0.05% —
64 NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio ALBANY, NY 276,144276.1k $7.6m $7.6m 0.02% —
65 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 272,594272.6k $7.5m $7.5m 0.01% —
66 RENAISSANCE TECHNOLOGIES LLC 0.01% of their portfolio NEW YORK, NY 266,850266.9k $7.3m $7.3m 0.01% —
67 MILLENNIUM MANAGEMENT LLC 0.01% of their portfolio NEW YORK, NY 265,830265.8k $7.3m $7.3m 0.01% —
68 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.01% of their portfolio WEST SACRAMENTO, CA 256,921256.9k $7.0m $7.0m 0.01% —
69 Barry Investment Advisors, LLC 2.32% of their portfolio NEW BEDFORD, MA 246,031246.0k $6.8m $6.8m 2.32% —
70 RAYMOND JAMES & ASSOCIATES 0.01% of their portfolio ST PETERSBURG, FL 246,030246.0k $6.7m $6.7m 0.01% —
71 Stockman Wealth Management, Inc. 1.83% of their portfolio BILLINGS, MT 245,998246.0k $6.7m $6.7m 1.83% —
72 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.11% of their portfolio BALA CYNWYD, PA 243,377243.4k $6.7m $6.7m 0.11% —
73 BANK OF NOVA SCOTIA 0.02% of their portfolio TORONTO, A6 242,644242.6k $6.6m $6.6m 0.02% —
74 CANADA LIFE ASSURANCE Co 0.02% of their portfolio WINNIPEG, A2 229,282229.3k $6.3m $6.3m 0.02% —
75 VOLORIDGE INVESTMENT MANAGEMENT, LLC 0.03% of their portfolio JUPITER, FL 211,253211.3k $5.8m $5.8m 0.03% —
76 Schonfeld Strategic Advisors LLC 0.05% of their portfolio NEW YORK, NY 209,731209.7k $5.7m $5.7m 0.05% —
77 NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio ALBANY, NY 204,805204.8k $5.6m $5.6m 0.01% —
78 Baird Financial Group, Inc. 0.02% of their portfolio MILWAUKEE, WI 197,257197.3k $5.4m $5.4m 0.02% —
79 KENNEDY CAPITAL MANAGEMENT LLC 0.16% of their portfolio ST LOUIS, MO 193,219193.2k $5.3m $5.3m 0.16% —
80 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 183,005183.0k $5.0m $5.0m 0.00% —
81 Ancora Advisors LLC 0.16% of their portfolio Cleveland, OH 182,126182.1k $5.0m $5.0m 0.16% —
82 BRIDGER MANAGEMENT, LLC 1.45% of their portfolio NEW YORK, NY 175,500175.5k $4.8m $4.8m 1.45% —
83 HENNESSY ADVISORS INC 0.32% of their portfolio NOVATO, CA 169,407169.4k $4.6m $4.6m 0.32% —
84 MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.06% of their portfolio New York, NY 163,357163.4k $4.5m $4.5m 0.06% —
85 Cladis Investment Advisory, LLC 2.46% of their portfolio BILLINGS, MT 153,088153.1k $4.2m $4.2m 2.46% —
86 BANK OF MONTREAL /CAN/ 0.00% of their portfolio TORONTO, A6 150,213150.2k $4.6m $4.6m 0.00% —
87 VOYA INVESTMENT MANAGEMENT LLC 0.00% of their portfolio ATLANTA, GA 149,154149.2k $4.1m $4.1m 0.00% —
88 Keeley-Teton Advisors, LLC 0.56% of their portfolio Chicago, IL 148,766148.8k $4.1m $4.1m 0.56% —
89 DC Investments Management, LLC 9.29% of their portfolio MCLEAN, VA 148,123148.1k $4.1m $4.1m 9.29% —
90 TEXAS PERMANENT SCHOOL FUND CORP 0.06% of their portfolio AUSTIN, TX 146,245146.2k $4.0m $4.0m 0.06% —
91 COMERICA BANK 0.03% of their portfolio DALLAS, TX 145,990146.0k $4.0m $4.0m 0.03% —
92 AMALGAMATED BANK 0.04% of their portfolio NEW YORK, NY 145,461145.5k $4.0m $4.0m 0.04% —
93 MetLife Investment Management, LLC 0.03% of their portfolio Whippany, NJ 130,567130.6k $3.6m $3.6m 0.03% —
94 Holocene Advisors, LP 0.02% of their portfolio New York, NY 129,063129.1k $3.5m $3.5m 0.02% —
95 OSAIC HOLDINGS, INC. 0.01% of their portfolio SCOTTSDALE, AZ 124,331124.3k $3.4m $3.4m 0.01% —
96 OCONNOR, A Distinct Business Unit of UBS ASSET MANAGEMENT AMERICAS (LLC) 0.04% of their portfolio CHICAGO, IL 122,647122.6k $3.4m $3.4m 0.04% —
97 D.A. DAVIDSON & CO. 0.04% of their portfolio GREAT FALLS, MT 120,039120.0k $3.3m $3.3m 0.04% —
98 J.P. Morgan Private Wealth Advisors LLC 0.01% of their portfolio SAN FRANCISCO, CA 119,408119.4k $3.3m $3.3m 0.01% —
99 COMMONWEALTH EQUITY SERVICES, LLC 0.01% of their portfolio WALTHAM, MA 119,404119.4k $3.3m $3.3m 0.01% —
100 EATON VANCE MANAGEMENT 0.00% of their portfolio BOSTON, MA 114,934114.9k $3.1m $3.1m 0.00% —