DMLP insider buying – Dorchester Minerals, L.P.
108 insider purchases since 2016 worth $19.5M by 9 different insiders. Last 12 months: 11 purchases, $2.3M. Most recent filing: 2026-08-19.
Mid company Public float $1.2B (latest 10-K, SEC).
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 56 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| DORCHESTER MINERALS OPERATING LP Other | $10.3M 50× · 433,829 sh | 2016-09-12 2026-06-01 | – | 70,017 shares as of 2026-06-02 | Holds - never sold |
| MCMANEMIN WILLIAM CASEY CEO | $2.7M 3× · 187,435 sh | 2017-06-30 2020-03-12 | – | 759,705 shares as of 2024-04-11 | Holds - never sold |
| EHRMAN BRADLEY J CEO | $1.7M 23× · 74,711 sh | 2016-03-07 2026-05-12 | – | 157,915 shares as of 2026-05-12 | Holds - never sold |
| MORIYAMA LESLIE A CFO | $1.4M 14× · 52,856 sh | 2017-06-30 2026-08-19 | – | 103,405 shares as of 2026-08-19 | Holds - never sold |
| VAUGHN ROBERT C Director | $1.3M 5× · 82,405 sh | 2017-06-30 2025-11-25 | – | 40,548 shares as of 2025-12-02 | Holds - never sold |
| Rochelle Martha Director | $961,327 1× · 64,174 sh | 2017-06-30 2017-06-30 | 2× · $911,836 last 2020-03-05 | 184,488 shares as of 2020-06-02 | Sold part |
| ALLEN H C JR Director | $750,627 9× · 51,580 sh | 2015-08-31 2020-03-06 | – | 39,028 shares as of 2021-06-02 | Holds - never sold |
| Box Frank Damon Director | $212,130 2× · 9,000 sh | 2025-09-05 2025-12-03 | – | 9,000 shares as of 2025-12-03 | Holds - never sold |
| LASSITER ALLEN D Director | $159,422 1× · 10,000 sh | 2018-03-13 2018-03-13 | – | 18,767 shares as of 2021-12-07 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2026 | 5 | $1.2M | 3 | – | – |
| 2025 | 11 | $2.1M | 5 | – | – |
| 2024 | 14 | $3.3M | 3 | – | – |
| 2023 | 9 | $2.3M | 3 | – | – |
| 2022 | 7 | $1.2M | 3 | – | – |
| 2021 | 8 | $646,598 | 3 | – | – |
| 2020 | 13 | $1.3M | 6 | 2 | $911,836 |
| 2019 | 11 | $1.1M | 3 | – | – |
| 2018 | 7 | $759,472 | 4 | – | – |
| 2017 | 12 | $5.0M | 7 | – | – |
| 2016 | 11 | $544,548 | 3 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-19 | MORIYAMA LESLIE A | CFO | 5,197 | $28.30 | $147,075 | +5.3% | SEC |
| 2026-06-02 | DORCHESTER MINERALS OPERATING LP | Other | 7,500 | $27.56 | $206,720 | +12.0% | SEC |
| 2026-05-22 | DORCHESTER MINERALS OPERATING LP | Other | 7,500 | $28.30 | $212,280 | +13.6% | SEC |
| 2026-05-12 | EHRMAN BRADLEY J | CEO | 4,000 | $26.78 | $107,120 | +2.9% | SEC |
| 2026-02-13 | DORCHESTER MINERALS OPERATING LP | Other | 20,000 | $25.24 | $504,750 | +57.1% | SEC |
| 2025-12-23 | DORCHESTER MINERALS OPERATING LP | Other | 15,000 | $22.28 | $334,150 | +74.9% | SEC |
| 2025-12-19 | DORCHESTER MINERALS OPERATING LP | Other | 20,000 | $22.26 | $445,216 | +117647.1% | SEC |
| 2025-12-03 | Box Frank Damon | Director | 5,000 | $21.97 | $109,850 | +125.0% | SEC |
| 2025-11-28 | VAUGHN ROBERT C | Director | 4,615 | $21.41 | $98,800 | +29.3% | SEC |
| 2025-11-28 | MORIYAMA LESLIE A | CFO | 3,041 | $21.50 | $65,382 | +3.8% | SEC |
| 2025-11-26 | EHRMAN BRADLEY J | CEO | 3,487 | $21.50 | $74,979 | +3.0% | SEC |
| 2025-09-08 | Box Frank Damon | Director | 4,000 | $25.57 | $102,280 | SEC | |
| 2025-05-01 | DORCHESTER MINERALS OPERATING LP | Other | 10,000 | $28.76 | $287,600 | +20.8% | SEC |
| 2025-03-04 | EHRMAN BRADLEY J | CEO | 3,356 | $29.80 | $100,009 | +2.9% | SEC |
| 2025-02-07 | DORCHESTER MINERALS OPERATING LP | Other | 335 | $31.06 | $10,405 | +0.7% | SEC |
| 2025-02-04 | DORCHESTER MINERALS OPERATING LP | Other | 14,000 | $31.32 | $438,525 | +41.6% | SEC |
| 2024-12-30 | DORCHESTER MINERALS OPERATING LP | Other | 954 | $33.19 | $31,662 | +2.9% | SEC |
| 2024-12-26 | DORCHESTER MINERALS OPERATING LP | Other | 10,500 | $32.46 | $340,835 | +47.2% | SEC |
| 2024-12-12 | DORCHESTER MINERALS OPERATING LP | Other | 22,000 | $32.97 | $725,309 | +9649.1% | SEC |
| 2024-12-05 | MORIYAMA LESLIE A | CFO | 12,050 | $34.41 | $414,640 | +16.9% | SEC |
| 2024-12-05 | EHRMAN BRADLEY J | CEO | 14,430 | $34.41 | $496,536 | +95.0% | SEC |
| 2024-11-15 | MORIYAMA LESLIE A | CFO | 3,218 | $32.60 | $104,907 | +4.7% | SEC |
| 2024-07-23 | DORCHESTER MINERALS OPERATING LP | Other | 2,900 | $32.23 | $93,460 | +4.6% | SEC |
| 2024-07-18 | DORCHESTER MINERALS OPERATING LP | Other | 4,878 | $32.39 | $158,005 | +8.3% | SEC |
| 2024-06-18 | EHRMAN BRADLEY J | CEO | 2,800 | $29.50 | $82,600 | +2.8% | SEC |
| 2024-05-23 | DORCHESTER MINERALS OPERATING LP | Other | 10,000 | $31.69 | $316,855 | +20.6% | SEC |
| 2024-05-20 | MORIYAMA LESLIE A | CFO | 2,430 | $31.74 | $77,138 | +3.7% | SEC |
| 2024-02-05 | DORCHESTER MINERALS OPERATING LP | Other | 1,275 | $30.90 | $39,402 | +2.7% | SEC |
| 2024-02-01 | DORCHESTER MINERALS OPERATING LP | Other | 5,000 | $31.66 | $158,320 | +11.8% | SEC |
| 2024-01-29 | DORCHESTER MINERALS OPERATING LP | Other | 7,500 | $33.47 | $250,990 | +21.6% | SEC |
| 2023-12-27 | DORCHESTER MINERALS OPERATING LP | Other | 4,920 | $31.90 | $156,959 | +16.5% | SEC |
| 2023-12-22 | DORCHESTER MINERALS OPERATING LP | Other | 8,506 | $31.86 | $270,987 | +39.8% | SEC |
| 2023-12-21 | DORCHESTER MINERALS OPERATING LP | Other | 21,306 | $31.43 | $669,635 | +31800.0% | SEC |
| 2023-11-13 | MORIYAMA LESLIE A | CFO | 8,013 | $28.12 | $225,326 | +16.3% | SEC |
| 2023-11-13 | EHRMAN BRADLEY J | CEO | 4,453 | $28.03 | $124,818 | +5.3% | SEC |
| 2023-06-15 | DORCHESTER MINERALS OPERATING LP | Other | 5,000 | $29.10 | $145,519 | +14.3% | SEC |
| 2023-06-01 | DORCHESTER MINERALS OPERATING LP | Other | 10,000 | $28.53 | $285,319 | +40.1% | SEC |
| 2023-03-23 | DORCHESTER MINERALS OPERATING LP | Other | 4,000 | $28.12 | $112,480 | +19.1% | SEC |
| 2023-03-06 | DORCHESTER MINERALS OPERATING LP | Other | 11,000 | $30.97 | $340,659 | +110.4% | SEC |
| 2022-12-13 | DORCHESTER MINERALS OPERATING LP | Other | 15,000 | $28.05 | $420,691 | +51.8% | SEC |
Showing the latest 40 of 108 purchases.
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2020-03-09 | Rochelle Martha | Director | 34,344 | $13.64 | $468,470 | Sale | SEC |
| 2020-03-05 | Rochelle Martha | Director | 30,000 | $14.78 | $443,366 | Sale | SEC |
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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