Mdu Resources Group (MDU)

Mdu Resources Group on one page: short interest, daily short volume, fails to deliver, large holders, 13F holders, earnings dates and insider trades. Listed on NYSE, classified by the SEC as natural gas distribution.

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18.8M

Short interest

settlement 2026-09-30

8.1

Days to cover

-1.1 days vs prior

44.1%

Short share of volume

2026-10-12

Fails to deliver

settlement 2026-09-14

Thu 5 Nov

Next earnings

estimated date

Insider flow, 90 days

0 buys, 0 sells

As of 2026-10-12.

Short interest

FINRA, twice a month. The newest 24 settlements in the table, 48 in the chart. JSON

As of 30 September 2026, short interest in MDU is 18,814,289 shares, up 2,799,056 shares over the last month. Over the last 48 readings it ranged from 4,341,657 shares (31 January 2025) to 18,814,289 shares (30 September 2026). The latest reading sits at the top of that range. At the reported average volume of 2.3M shares a day that is 8.1 days to cover.

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Settlement	Shares short	Change	Avg daily volume	Days to cover
2026-09-30	18,814,289	+10.1%	2,326,289	8.09
2026-09-15	17,086,955	+6.7%	1,854,881	9.21
2026-08-31	16,015,233	+11.7%	1,319,751	12.14
2026-08-14	14,332,889	+4.5%	1,768,082	8.11
2026-07-31	13,710,846	+8.7%	1,188,061	11.54
2026-07-15	12,619,019	+4.0%	1,479,575	8.53
2026-06-30	12,128,164	+7.0%	1,960,218	6.19
2026-06-15	11,337,730	+12.1%	1,358,163	8.35
2026-05-29	10,117,518	-1.9%	2,380,816	4.25
2026-05-15	10,317,369	-11.1%	1,763,384	5.85
2026-04-30	11,603,095	+3.8%	1,427,268	8.13
2026-04-15	11,174,679	-0.2%	1,526,427	7.32
2026-03-31	11,199,904	-6.1%	2,050,170	5.46
2026-03-13	11,930,760	-1.3%	1,810,907	6.59
2026-02-27	12,085,403	-7.1%	1,616,309	7.48
2026-02-13	13,012,911	+6.9%	2,218,403	5.87
2026-01-30	12,170,403	-5.7%	1,776,663	6.85
2026-01-15	12,902,944	-8.3%	2,472,925	5.22
2025-12-31	14,069,208	+16.7%	2,174,841	6.47
2025-12-15	12,052,688	+15.6%	2,777,468	4.34
2025-11-28	10,429,344	-8.4%	1,883,412	5.54
2025-11-14	11,387,225	+10.0%	3,009,219	3.78
2025-10-31	10,351,330	+6.7%	2,689,449	3.85
2025-10-15	9,698,669	+16.6%	2,868,239	3.38

Daily short volume

FINRA Reg SHO, the last 30 sessions. JSON

As of 12 October 2026, the short share of MDU volume is 44.1%, down 17.7 points over the last five sessions. Over the last 30 readings it ranged from 35.8% (29 September 2026) to 71.7% (30 September 2026). The latest reading is 8.5 points below the 30-session average of 52.6%, on 376K shares reported.

Date	Short volume	Total volume	Short share	Exempt
2026-10-12	166K	376K	44.1%	0
2026-10-09	209K	391K	53.3%	0
2026-10-08	269K	466K	57.8%	137
2026-10-07	224K	423K	53.0%	0
2026-10-06	241K	513K	47.0%	752
2026-10-05	352K	569K	61.9%	362
2026-10-02	203K	343K	59.2%	21
2026-10-01	388K	848K	45.7%	347
2026-09-30	630K	878K	71.7%	400
2026-09-29	270K	754K	35.8%	288
2026-09-28	394K	732K	53.8%	1,506
2026-09-25	363K	732K	49.7%	0
2026-09-24	504K	1.2M	41.2%	923
2026-09-23	273K	534K	51.1%	174
2026-09-22	353K	628K	56.3%	0
2026-09-21	205K	391K	52.3%	323
2026-09-18	371K	572K	64.8%	110
2026-09-17	304K	695K	43.7%	0
2026-09-16	455K	638K	71.4%	275
2026-09-15	465K	823K	56.5%	88
2026-09-14	389K	790K	49.3%	0
2026-09-11	325K	574K	56.7%	3
2026-09-10	234K	447K	52.3%	15
2026-09-09	317K	497K	63.8%	601
2026-09-08	256K	583K	43.9%	18
2026-09-04	249K	694K	35.8%	454
2026-09-03	394K	996K	39.6%	370
2026-09-02	258K	497K	52.0%	171
2026-09-01	312K	561K	55.6%	1,409
2026-08-31	349K	591K	59.0%	464

Fails to deliver

SEC, the last 30 settlement dates with a fail. JSON

As of 14 September 2026, the fails-to-deliver balance in MDU is 66 shares, down 4,391 shares over the last settlement date. Over the last 30 readings it ranged from 6 shares (7 August 2026) to 16,546 shares (4 June 2026). The latest reading sits at the bottom of that range.

Settlement	Shares failed	Price	Value
2026-09-14	66	$19.20	$1K
2026-09-11	4,457	$19.24	$86K
2026-09-10	4,558	$19.59	$89K
2026-09-09	1,251	$19.84	$25K
2026-09-08	865	$19.57	$17K
2026-09-03	9,741	$19.81	$193K
2026-09-02	445	$19.95	$9K
2026-09-01	1,566	$19.92	$31K
2026-08-27	2,962	$20.29	$60K
2026-08-24	1,685	$19.95	$34K
2026-08-12	52	$20.50	$1K
2026-08-10	132	$20.55	$3K
2026-08-07	6	$20.76	$125
2026-08-05	106	$20.08	$2K
2026-07-16	7,462	$21.09	$157K
2026-07-10	3,156	$20.78	$66K
2026-07-07	1,189	$20.37	$24K
2026-07-01	239	$21.21	$5K
2026-06-30	381	$21.45	$8K
2026-06-29	100	$21.88	$2K
2026-06-26	3,030	$21.70	$66K
2026-06-18	17	$20.89	$355
2026-06-15	66	$21.11	$1K
2026-06-10	5,098	$20.97	$107K
2026-06-09	234	$21.09	$5K
2026-06-04	16,546	$20.76	$343K
2026-06-02	3,596	$20.72	$75K
2026-05-26	19	$22.16	$421
2026-05-22	6,071	$21.83	$133K
2026-05-12	2,877	$22.80	$66K

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

No open-market insider trades were reported for MDU in the last 90 days. The most recent filings are listed below. Latest filing: Dosch Vernon A. (Director) on 2026-09-30.

Date	Insider	Title	Type	Shares	Price	Value	Owned after
2026-09-30	Dosch Vernon A.	Director	Grant	1K	$0.00	$0	20K
2026-09-30	DURKIN MARIAN M	Director	Grant	172	$0.00	$0	12K
2026-06-30	Dosch Vernon A.	Director	Grant	1K	$0.00	$0	19K
2026-06-30	DURKIN MARIAN M	Director	Grant	152	$0.00	$0	12K
2026-03-31	Dosch Vernon A.	Director	Grant	1K	$0.00	$0	17K
2026-03-31	DURKIN MARIAN M	Director	Grant	157	$0.00	$0	12K
2026-02-18	Vollmer Jason L	CFO	Tax withholding	37K	$20.36	$749K	325K
2026-02-18	Sievert Stephanie A	ChiefAccntg&RegAffairsOfficer	Tax withholding	10K	$20.36	$213K	91K
2026-02-18	Senger Garret	Chief Utilities Officer	Tax withholding	8K	$20.36	$166K	100K
2026-02-18	Kivisto Nicole A	President & CEO	Tax withholding	36K	$20.36	$726K	548K
2026-02-18	Jones Anne M	ChiefHRSafety&AdminOfficer	Tax withholding	12K	$20.36	$245K	118K
2026-02-18	Johnson Rob L.	President-WBI	Tax withholding	11K	$20.36	$216K	83K
2026-02-17	Vollmer Jason L	CFO	Grant	15K	$0.00	$0	362K
2026-02-17	Sievert Stephanie A	ChiefAccntg&RegAffairsOfficer	Grant	5K	$0.00	$0	101K
2026-02-17	Senger Garret	Chief Utilities Officer	Grant	7K	$0.00	$0	108K
2026-02-17	Kivisto Nicole A	President & CEO	Grant	45K	$0.00	$0	584K
2026-02-17	Jones Anne M	ChiefHRSafety&AdminOfficer	Grant	6K	$0.00	$0	130K
2026-02-17	Johnson Rob L.	President-WBI	Grant	6K	$0.00	$0	93K
2026-02-17	Foti Anthony Donald	CLO & Corporate Secretary	Grant	8K	$0.00	$0	17K
2026-02-17	Boese Dyke A.	CIO	Grant	4K	$0.00	$0	7K
2026-02-13	KELLEY CHARLES M	Director	Buy	5K	$20.84	$104K	8K
2025-12-31	Dosch Vernon A.	Director	Grant	1K	$0.00	$0	16K
2025-12-31	DURKIN MARIAN M	Director	Grant	164	$0.00	$0	11K
2025-11-13	Patel Priti Rashmikant	Director	Grant	5K	$0.00	$0	5K
2025-11-13	Miller Tammy J	Director	Grant	3K	$0.00	$0	6K
2025-11-13	KELLEY CHARLES M	Director	Grant	3K	$0.00	$0	3K
2025-11-13	Jaeger Douglas W.	Director	Grant	7K	$0.00	$0	13K
2025-11-13	JOHNSON DENNIS W	Director	Grant	8K	$0.00	$0	188K
2025-11-13	Dosch Vernon A.	Director	Grant	7K	$0.00	$0	15K
2025-11-13	DURKIN MARIAN M	Director	Grant	7K	$0.00	$0	11K
2025-11-13	ANDERSON DARREL T	Director	Grant	8K	$0.00	$0	18K
2025-09-30	Dosch Vernon A.	Director	Grant	2K	$0.00	$0	7K
2025-09-30	DURKIN MARIAN M	Director	Grant	182	$0.00	$0	4K
2025-09-08	Vollmer Jason L	CFO	Buy	5K	$16.07	$80K	345K
2025-08-19	Vollmer Jason L	CFO	Buy	5K	$16.27	$81K	340K
2025-06-30	Dosch Vernon A.	Director	Grant	2K	$0.00	$0	6K
2025-06-30	DURKIN MARIAN M	Director	Grant	175	$0.00	$0	4K
2025-05-15	Boese Dyke A.	CIO	I	8K	$16.99	$132K	17K
2025-05-15	Boese Dyke A.	CIO	I	8K	$16.99	$132K	17K
2025-03-31	Dosch Vernon A.	Director	Grant	2K	$0.00	$0	4K
2025-03-31	DURKIN MARIAN M	Director	Grant	165	$0.00	$0	4K
2025-02-12	Boese Dyke A.	CIO	Grant	3K	$0.00	$0	3K
2025-02-12	Foti Anthony Donald	CLO & Corporate Secretary	Grant	8K	$0.00	$0	8K
2025-02-12	Johnson Rob L.	President-WBI	Tax withholding	7K	$16.83	$114K	87K
2025-02-12	Johnson Rob L.	President-WBI	Grant	6K	$0.00	$0	94K
2025-02-12	Jones Anne M	ChiefHRAdmin&SafetyOfficer	Grant	6K	$0.00	$0	135K
2025-02-12	Jones Anne M	ChiefHRAdmin&SafetyOfficer	Tax withholding	11K	$16.83	$181K	125K
2025-02-12	Kivisto Nicole A	President & CEO	Tax withholding	30K	$16.83	$510K	538K
2025-02-12	Kivisto Nicole A	President & CEO	Grant	46K	$0.00	$0	568K
2025-02-12	Senger Garret	Chief Utilities Officer	Tax withholding	7K	$16.83	$126K	101K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are rarer.

Large holders (13D and 13G)

One row per reporting person with its latest filing, newest first. JSON

4 holders report 5% or more of MDU in their latest filing, all on Schedule 13G (passive). The largest reported stake is BARROW HANLEY MEWHINNEY & STRAUSS LLC at 6.3% of the class (13,056,724 shares), filed 2026-08-12 for an event on 2026-06-30.

Filed	Form	Holder	Shares	Of class	Event
2026-10-08	13G	Dimensional Fund Advisors LPinvestment adviser	10.7M	5.1%	2026-09-30
2026-08-12	13G	BARROW HANLEY MEWHINNEY & STRAUSS LLCinvestment adviser	13.1M	6.3%	2026-06-30
2026-04-30	13G	Vanguard Capital Managementinvestment adviser	10.8M	5.3%	2026-03-31
2026-04-29	13G	Vanguard Portfolio Managementinvestment adviser	12.6M	6.1%	2026-03-31
2026-03-27	13G/Ano. 14	The Vanguard Groupinvestment adviser	0	0.0%	2026-03-13

13F holders

Tracked managers holding MDU at their latest 13F. JSON

7 of the 30 tracked managers held MDU at their latest 13F, $109.4M in total at quarter-end prices. Citadel Advisors is the largest at $40.5M (0.0% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 1 cut.

Fund	Quarter	Shares	Value	Of portfolio	Change in shares
Citadel Advisors	2026-06-30	1.9M	$40.5M	0.00%	+815K
Renaissance Technologies	2026-06-30	957K	$20.3M	0.03%	+27K
Two Sigma Investments	2026-06-30	899K	$19.1M	0.01%	+416K
Millennium Management	2026-06-30	625K	$13.3M	0.00%	+291K
D. E. Shaw & Co.	2026-06-30	451K	$9.6M	0.00%	-20K
AQR Capital Management	2026-06-30	235K	$5.0M	0.00%	+73K
Bridgewater Associates	2026-06-30	81K	$1.7M	0.01%	+28K

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

What this page is

Mdu Resources Group in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page puts those series for one ticker on one URL, with planned sales, large holders, 13F holders and financials beside them, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a one-line summary of the latest figures and its own JSON and CSV links, and says when its source last updated.

This page follows Mdu Resources Group (MDU), SEC CIK 67716, listed on NYSE, classified by the SEC as natural gas distribution. The cross-market tables live on the short interest and insider transactions hubs.

Source and updates

Short interest: FINRA consolidated short interestSource: FINRA.Twice a month, about eight business days after settlement. Latest 2026-09-30.JSON and CSV
Daily short volume: FINRA Reg SHO daily filesSource: FINRA.Every trading day, the morning after FINRA posts it. Latest 2026-10-12.JSON and CSV
Fails to deliver: SEC fails-to-deliver dataSource: SEC.Twice a month, a few weeks after the half month ends. Latest 2026-09-14.JSON and CSV
Large holders: SEC EDGAR Schedule 13D and 13GSource: SEC.New filings appear shortly after the SEC posts them. A 13D is due within five business days of crossing 5%; a 13G follows the passive schedule. Latest 2026-10-08.JSON and CSV
13F holders: SEC EDGAR Form 13F-HRSource: SEC.Quarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Earnings dates: SEC EDGAR 8-K filings (Item 2.02)Source: SEC.Twice a day. Reported dates come from the company's 8-K filings; the next date is marked as an estimate until the 8-K arrives. Latest 2026-08-06.JSON and CSV
Insider trades: SEC EDGAR Form 4Source: SEC.New filings appear shortly after the SEC posts them; they're due two business days after the trade. Latest 2026-09-30.JSON and CSV
Company record: EDGAR filing index for CIK 67716Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits: 10 requests a minute without a key, 30 with a free key from a free account.

How to read it

Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
Insider buys next to a large short position are rare and stand out; insider sells next to one are common and mean little.
Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Other companies the SEC classifies as natural gas distribution

Other company pages

Datasets

Frequently Asked Questions

How much of MDU is sold short?

18,814,289 shares were held short at the 2026-09-30 settlement, 8.1 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.

What is MDU's daily short volume?

On 2026-10-12, 166,024 of the 376,170 MDU shares reported to FINRA were sold short, 44.1% of the day's reported volume. Short volume is a flow for one day, not a position.

Does MDU have fails to deliver?

The SEC's latest file shows 66 MDU shares failed to deliver at settlement 2026-09-14. Fails are reported per settlement date and published twice a month with a lag.

Are MDU insiders buying or selling?

No open-market insider trades were reported for MDU in the last 90 days. The most recent filings are listed below. Latest filing: Dosch Vernon A. (Director) on 2026-09-30.

Who owns 5% or more of MDU?

Which tracked 13F managers own MDU?

7 of the 30 tracked 13F managers held MDU shares at their latest filing, $109.4M in all. The largest: Ken Griffin's Citadel Advisors (1.9M shares, $40.5M), Renaissance Technologies (957K shares, $20.3M), Two Sigma Investments (899K shares, $19.1M), Izzy Englander's Millennium Management (625K shares, $13.3M), D. E. Shaw & Co. (451K shares, $9.6M), Cliff Asness's AQR Capital Management (235K shares, $5.0M). The table above lists all 7.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.