Jason L Vollmer

Insider

First SEC filing: Dec. 1, 2014 · Latest: Dec. 1, 2014

On this page

Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Initial holdings The stakes this person held when they first started reporting.
Compensation Executive pay disclosed in company proxy statements.

Insider at

MDU buying Sept. 8, 2025

Insider transactions

1 buys (P) 0 sells (S) Net: $80,400 + 24 non-open-market transactions below Avg return of open purchases vs now: 26.3% last 12 months, based on the transactions shown below

Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted

24 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Feb. 18, 2026	MDU	F	36,766	$20.36	$748,556	324,976 Direct	-10.16%	Disposed	-0.2% (price as of 2026-08-21)
Feb. 17, 2026	MDU	A	15,229	—	—	361,742 Direct	+4.39%	Acquired	(price as of 2026-08-21)
Sept. 8, 2025	MDU	P	5,000	$16.08	$80,400	344,548 Direct	+1.47%	Acquired	26.3% (price as of 2026-08-21)
Aug. 19, 2025	MDU	P	5,000	$16.27	$81,350	339,548 Direct	+1.49%	Acquired	24.9% (price as of 2026-08-21)
Feb. 12, 2025	MDU	A	16,700	—	—	363,118 Direct	+4.82%	Acquired	(price as of 2026-08-21)
Feb. 12, 2025	MDU	F	30,429	$16.83	$512,120	332,689 Direct	-8.38%	Disposed	20.7% (price as of 2026-08-21)
Feb. 15, 2024	MDU	A	56,459	—	—	227,681 Direct	+32.97%	Acquired	(price as of 2026-08-21)
Feb. 15, 2024	MDU	F	12,067	$20.85	$251,597	215,614 Direct	-5.30%	Disposed	75.9% (price as of 2026-08-21)
May 31, 2023	MDU	A	19,064	—	—	118,490 Direct	+19.17%	Acquired	(price as of 2026-08-21)
May 31, 2023	MDU	A	13,771	—	—	132,261 Direct	+11.62%	Acquired	(price as of 2026-08-21)
Feb. 16, 2023	MDU	A	31,574	—	—	88,937 Direct	+55.04%	Acquired	(price as of 2026-08-21)
Feb. 16, 2023	MDU	A	16,581	$31.16	$516,664	105,518 Direct	+18.64%	Acquired	71.5% (price as of 2026-08-21)
Feb. 16, 2023	MDU	F	6,486	$31.16	$202,104	99,032 Direct	-6.15%	Disposed	71.5% (price as of 2026-08-21)
Feb. 17, 2022	MDU	A	6,957	—	—	56,018 Direct	+14.18%	Acquired	(price as of 2026-08-21)
Feb. 17, 2022	MDU	A	26,795	$27.73	$743,025	52,963 Direct	+102.40%	Acquired	92.7% (price as of 2026-08-21)
Feb. 17, 2022	MDU	F	10,652	$27.73	$295,380	42,311 Direct	-20.11%	Disposed	92.7% (price as of 2026-08-21)
Feb. 11, 2021	MDU	A	6,750	—	—	49,061 Direct	+15.95%	Acquired	(price as of 2026-08-21)
Feb. 11, 2021	MDU	A	23,980	$27.35	$655,853	35,008 Direct	+217.45%	Acquired	95.3% (price as of 2026-08-21)
Feb. 11, 2021	MDU	F	9,551	$27.35	$261,220	25,457 Direct	-27.28%	Disposed	95.3% (price as of 2026-08-21)
Nov. 11, 2020	MDU	P	600	$24.92	$14,952	10,538 Direct	+6.04%	Acquired	114.4% (price as of 2026-08-21)
Nov. 11, 2020	MDU	P	400	$24.93	$9,972	10,938 Direct	+3.80%	Acquired	114.3% (price as of 2026-08-21)
May 13, 2020	MDU	P	1,000	$19.61	$19,610	9,754 Direct	+11.42%	Acquired	172.4% (price as of 2026-08-21)
March 9, 2020	MDU	P	1,000	$27.31	$27,310	8,469 Direct	+13.39%	Acquired	95.6% (price as of 2026-08-21)
March 9, 2020	MDU	P	200	$27.32	$5,464	8,669 Direct	+2.36%	Acquired	95.6% (price as of 2026-08-21)
Feb. 13, 2020	MDU	A	899	$31.63	$28,435	7,752 Direct	+13.12%	Acquired	68.9% (price as of 2026-08-21)
Feb. 13, 2020	MDU	F	283	$31.63	$8,951	7,469 Direct	-3.65%	Disposed	68.9% (price as of 2026-08-21)
Feb. 14, 2019	MDU	F	1,907	$26.25	$50,059	6,651 Direct	-22.28%	Disposed	103.5% (price as of 2026-08-21)
Feb. 14, 2019	MDU	A	6,673	—	—	8,558 Direct	+354.01%	Acquired	(price as of 2026-08-21)
Feb. 16, 2018	MDU	F	866	$27.48	$23,798	1,885 Direct	-31.48%	Disposed	94.4% (price as of 2026-08-21)
Feb. 16, 2018	MDU	A	2,751	—	—	2,751 Direct	—	Acquired	(price as of 2026-08-21)
Feb. 17, 2015	MDU	I	909	$21.68	$19,707	2,605 Indirect	+53.60%	Acquired	146.4% (price as of 2026-08-21)

P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding

Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.

Initial ownership (Form 3) 1 holding

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Dec. 1, 2014	MDU	Common Stock - (401-k) [F1]	1,640	Indirect

Compensation (DEF 14A)

Matched by name from proxy statements (DEF 14A) — verify against the filing.

MDU

Fiscal year	Salary	Bonus	Stock awards	Option awards	Non-equity incentive	Pension change	Other	Total
2025	$611,000	—	$944,686	—	$579,228	$1,938	$135,274	$2,272,126
2023	$565,000	—	—	—	$760,631	$1,966	$122,874	$2,457,791
2022	$530,000	—	—	—	$225,383	—	$150,957	$1,766,989

Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.