MDU Resources Group, Inc.
MDU Resources Group, Inc. (MDU) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · MDU · as of Sep 30, 2025
Ownership Breakdown
408
Institutional Holders
▼ 1 vs Q2
$2.96B
Total Inst. Value
▲ $254.30M vs Q2
209.01M
Shares Outstanding
freeFloat 97.14%
166.13M
13F Shares Held
▲ 4.02M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
MDU largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. mining & quarrying of nonmetallic minerals (no fuels) | 25.79M | 12.62% | 12.62% | $459.24B | Nov 12, 2025 | ▲ 768.9K |
VANGUARD GROUP INC mining & quarrying of nonmetallic minerals (no fuels) | 23.26M | 11.38% | 11.38% | $414.22B | Nov 7, 2025 | ▼ 40.8K |
DIMENSIONAL FUND ADVISORS LP mining & quarrying of nonmetallic minerals (no fuels) | 9.76M | 4.78% | 4.78% | $173.90B | Nov 12, 2025 | ▲ 339.6K |
BARROW HANLEY MEWHINNEY & STRAUSS LLC mining & quarrying of nonmetallic minerals (no fuels) | 9.13M | 4.47% | 4.47% | $162.57B | Nov 13, 2025 | ▲ 348.8K |
STATE STREET CORP mining & quarrying of nonmetallic minerals (no fuels) | 6.84M | 3.35% | 3.35% | $122.76B | Nov 14, 2025 | ▲ 291.7K |
RIVER ROAD ASSET MANAGEMENT, LLC mining & quarrying of nonmetallic minerals (no fuels) | 5.29M | 2.59% | 2.59% | $94.21B | Nov 12, 2025 | ▲ 3.78M |
CORVEX MANAGEMENT LP mining & quarrying of nonmetallic minerals (no fuels) | 4.18M | 2.05% | 2.05% | $74.50B | Nov 14, 2025 | — held |
MORGAN STANLEY mining & quarrying of nonmetallic minerals (no fuels) | 3.66M | 1.79% | 1.79% | $65.17B | May 27, 2026 | ▲ 82.4K |
GEODE CAPITAL MANAGEMENT, LLC mining & quarrying of nonmetallic minerals (no fuels) | 3.39M | 1.66% | 1.66% | $60.46B | Nov 12, 2025 | ▼ 33.3K |
MACQUARIE GROUP LTD mining & quarrying of nonmetallic minerals (no fuels) | 3.22M | 1.58% | 1.58% | $57.33B | Nov 13, 2025 | ▼ 146.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
28
Increased
+14.12M shares1
New Positions
first time holders20
Decreased
−4.66M shares0
Sold Out
fully exitedNet shares change (top 50)
+9.46M
+14.12M / −4.66M
Net new holders
+9
1 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
MDU insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
11
Buy transactions
6
Sell transactions
1.83
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
DURKIN MARIAN M director | Mar 31, 2026 | Award | 157 | — | — | 11.5K | Form 4 ↗ |
Dosch Vernon A. director | Mar 31, 2026 | Award | 1,334 | — | — | 17.5K | Form 4 ↗ |
Vollmer Jason L CFO | Feb 17, 2026 | Award | 15,229 | — | — | 361.7K | Form 4 ↗ |
Vollmer Jason L CFO | Feb 18, 2026 | Tax Withhold | 36,766 | $20.36 | $748.6K | 325.0K | Form 4 ↗ |
Foti Anthony Donald CLO & Corporate Secretary | Feb 17, 2026 | Award | 8,161 | — | — | 16.6K | Form 4 ↗ |
Sievert Stephanie A ChiefAccntg&RegAffairsOfficer | Feb 17, 2026 | Award | 4,544 | — | — | 100.9K | Form 4 ↗ |
Sievert Stephanie A ChiefAccntg&RegAffairsOfficer | Feb 18, 2026 | Tax Withhold | 10,438 | $20.36 | $212.5K | 90.5K | Form 4 ↗ |
Senger Garret Chief Utilities Officer | Feb 17, 2026 | Award | 6,920 | — | — | 108.2K | Form 4 ↗ |
Senger Garret Chief Utilities Officer | Feb 18, 2026 | Tax Withhold | 8,167 | $20.36 | $166.3K | 100.0K | Form 4 ↗ |
Boese Dyke A. CIO | Feb 17, 2026 | Award | 3,702 | — | — | 7.1K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
MDU Resources Group, Inc. (MDU) is primarily owned by institutional investors, who hold approximately 79.5% of total shares outstanding. Company insiders own approximately 2.86%, while retail and public investors account for the remaining 17.65%.
The largest institutional shareholder of MDU Resources Group, Inc. is BLACKROCK, INC., holding approximately 25.79 million shares — equal to 12.62% of outstanding shares — as of September 30, 2025.
A total of 408 institutional investors currently hold MDU stock, with a combined institutional value of approximately $2.96 billion as of the most recent 13F filing period.
Frequently asked questions
MDU ownershipMDU Resources Group, Inc. (MDU) is primarily owned by institutional investors, who hold approximately 79.5% of shares. The largest shareholder is BLACKROCK, INC. with a 12.62% stake. Company insiders hold 2.86%. Data sourced from SEC Form 13F as of September 30, 2025.