# MDU RES GROUP INC COM

MDU RES GROUP INC COM is a security (CUSIP 552690109) tracked across SEC portfolio filings. 441 institutional managers reported $3.7B on Form 13F as of 2026-06-30; 22 registered fund positions totaling $124.6M via N-PORT as of 2026-05-31.

## Summary

- Issuer: MDU RES GROUP INC
- Class: COM
- CUSIP: 552690109
- Asset category: EC
- 13F holders: 441
- 13F value: $3.7B
- 13F period: 2026-06-30
- N-PORT fund positions: 22
- N-PORT value: $124.6M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 441 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $532.8M | 25,712,048 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $465.1M | 23,828,483 |
| [BARROW HANLEY MEWHINNEY & STRAUSS LLC](https://search.stillhousedata.com/firm/105519) | DALLAS, TX | $285.1M | 13,760,167 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $213.1M | 10,285,747 |
| [EARNEST PARTNERS LLC](https://search.stillhousedata.com/firm/107926) | ATLANTA, GA | $204.8M | 9,881,880 |
| STATE STREET CORP | BOSTON, MA | $145.8M | 6,990,274 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $128.5M | 6,202,460 |
| SEI INVESTMENTS CO | OAKS, PA | $109.0M | 5,261,426 |
| MORGAN STANLEY | NEW YORK, NY | $87.5M | 4,221,525 |
| WESTWOOD HOLDINGS GROUP INC | DALLAS, TX | $73.4M | 3,542,046 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $72.4M | 3,491,440 |
| [River Road Asset Management, LLC](https://search.stillhousedata.com/firm/134918) | LOUISVILLE, KY | $72.2M | 3,403,955 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | PHILADELPHIA, PA | $53.8M | 2,596,001 |
| [FRONTIER CAPITAL MANAGEMENT CO LLC](https://search.stillhousedata.com/firm/106274) | Boston, MA | $51.9M | 2,506,549 |
| Bank of New York Mellon Corp | NEW YORK, NY | $49.4M | 2,330,719 |

## Top fund holders (N-PORT)

_Showing 15 of 22 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $47.2M | 5.80% |
| [T. Rowe Price Small-Cap Value Fund, Inc.](https://search.stillhousedata.com/fund/S000002121) | T. ROWE PRICE SMALL-CAP VALUE FUND, INC. | $22.5M | 24.39% |
| [MFS New Discovery Value Fund](https://search.stillhousedata.com/fund/S000032712) | MFS SERIES TRUST XIII | $11.8M | 47.60% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $7.7M | 10.36% |
| [Keeley Gabelli Small Cap Dividend Fund](https://search.stillhousedata.com/fund/S000026907) | Keeley Funds, Inc. | $7.4M | 282.82% |
| [FPA Queens Road Small Cap Value Fund](https://search.stillhousedata.com/fund/S000004901) | Bragg Capital Trust | $6.7M | 138.62% |
| [Small Cap Portfolio](https://search.stillhousedata.com/fund/S000001917) | BNY MELLON VARIABLE INVESTMENT FUND | $3.9M | 125.26% |
| [The Gabelli Utilities Fund](https://search.stillhousedata.com/fund/S000001075) | Gabelli Utilities Fund | $3.9M | 21.76% |
| [VictoryShares US Small Cap High Div Volatility Wtd ETF](https://search.stillhousedata.com/fund/S000049908) | Victory Portfolios II | $3.5M | 136.78% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $2.4M | 0.40% |
| [Large Cap Index Master Portfolio](https://search.stillhousedata.com/fund/S000033023) | Master Investment Portfolio | $2.4M | 0.65% |
| [BNY Mellon Smallcap Stock Index Fund](https://search.stillhousedata.com/fund/S000000132) | BNY MELLON INDEX FUNDS, INC. | $2.3M | 27.09% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $2.0M | 0.65% |
| Gabelli Global Utility & Income Trust | Gabelli Global Utility & Income Trust | $518K | 44.19% |
| [Delaware Mid Cap Value Fund](https://search.stillhousedata.com/fund/S000020812) | Delaware Group Equity Funds I | $502K | 83.78% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/552690109.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.