Company / CIK 0001172358
DORCHESTER MINERALS, L.P.
- Ticker
- DMLP
- Size, estimated from filings
- Small cap ($300M – $2B)
- Insiders on file
- 5
- Members of Congress who traded it
- 1
- Federal contracts on record
- none matched
- Lobbying filings on record
- none matched
- SEC filings
- EDGAR ↗
- Latest trade on record
- August 19, 2026
DORCHESTER MINERALS, L.P. (DMLP) has 5 insiders on file who disclosed 40 transactions in the last 12 months (21 open-market buys, 6 sales, about $4.6M at reported prices), and 1 congressional trade in its stock is on record. No federal contract award that started in the last 180 days was found for a recipient with exactly this name; no lobbying filing names it as client this year.
DORCHESTER MINERALS, L.P. in charts
Who is trading this stock
Which people account for the buying and selling over the last 12 months?
6 people account for the disclosed buying and selling in DORCHESTER MINERALS, L.P. over the last 12 months; the most active is DORCHESTER MINERALS OPERATING LP with $1.7M.
Insiders
| Name | Role | Rows | Bought | Sold | Last filed |
|---|---|---|---|---|---|
| MORIYAMA LESLIE A | Chief Financial Officer | 11 | 2 | 3 | August 19, 2026 |
| DORCHESTER MINERALS OPERATING LP | Insider | 13 | 12 | 0 | June 2, 2026 |
| EHRMAN BRADLEY J | Chief Executive Officer | 12 | 3 | 3 | May 12, 2026 |
| Box Frank Damon | Director | 1 | 1 | 0 | December 3, 2025 |
| VAUGHN ROBERT C | Director | 3 | 3 | 0 | December 2, 2025 |
Rows are this company's Form 4 rows for each person. "Bought" and "sold" count open-market purchases (code P) and sales only. More in insider buying and insider selling.
Members of Congress who traded DMLP
From periodic transaction reports that name the company's stock. Amounts are the sums of the ranges as filed. Every row is on the DMLP page.
| Member | Seat | Trades | Bought | Sold | Range as filed | Latest |
|---|---|---|---|---|---|---|
| August Pfluger | Representative (TX, District 11), Republican | 1 | 1 | 0 | $15K–$50K | March 13, 2026 |
Insider transactions
| Filer | Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|---|
| MORIYAMA LESLIE A | DMLP | Buy P | August 19, 2026 | August 19, 2026 | 0d | 5,197 | $28 | $147K | Form 4 ↗ | ||
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | June 1, 2026 | June 2, 2026 | 1d | 4,001 | $28 | $110K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | June 1, 2026 | June 2, 2026 | 1d | 999 | $28 | $28K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | June 1, 2026 | June 2, 2026 | 1d | 2,500 | $28 | $69K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | May 20, 2026 | May 22, 2026 | 2d | 6,000 | $28 | $170K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | May 20, 2026 | May 22, 2026 | 2d | 1,500 | $28 | $42K | 10b5-1 plan | Form 4 ↗ | |
| EHRMAN BRADLEY J | DMLP | Buy P | May 12, 2026 | May 12, 2026 | 0d | 4,000 | $27 | $107K | indirect | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | February 13, 2026 | February 13, 2026 | 0d | 5,000 | $25 | $126K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | February 12, 2026 | February 13, 2026 | 1d | 5,000 | $25 | $125K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | February 11, 2026 | February 13, 2026 | 2d | 10,000 | $25 | $253K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | December 22, 2025 | December 23, 2025 | 1d | 10,000 | $22 | $223K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | December 19, 2025 | December 23, 2025 | 4d | 5,000 | $22 | $111K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | December 18, 2025 | December 19, 2025 | 1d | 15,729 | $22 | $350K | 10b5-1 plan | Form 4 ↗ | |
| DORCHESTER MINERALS OPERATING LP | DMLP | Buy P | December 17, 2025 | December 19, 2025 | 2d | 4,271 | $22 | $95K | 10b5-1 plan | Form 4 ↗ | |
| MORIYAMA LESLIE A | DMLP | Option / conversion M | December 15, 2025 | December 17, 2025 | 2d | 4,351 | — | — | derivative | Form 4 ↗ | |
| MORIYAMA LESLIE A | DMLP | Sell F | December 15, 2025 | December 17, 2025 | 2d | 1,756 | — | — | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Option / conversion M | December 15, 2025 | December 17, 2025 | 2d | 4,351 | — | — | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Option / conversion M | December 15, 2025 | December 17, 2025 | 2d | 4,727 | — | — | derivative | Form 4 ↗ | |
| EHRMAN BRADLEY J | DMLP | Sell F | December 15, 2025 | December 17, 2025 | 2d | 1,719 | — | — | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Option / conversion M | December 15, 2025 | December 17, 2025 | 2d | 4,727 | — | — | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Option / conversion M | December 3, 2025 | December 5, 2025 | 2d | 4,017 | — | — | derivative | Form 4 ↗ | |
| MORIYAMA LESLIE A | DMLP | Sell F | December 3, 2025 | December 5, 2025 | 2d | 1,621 | — | — | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Option / conversion M | December 3, 2025 | December 5, 2025 | 2d | 4,017 | — | — | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Option / conversion M | December 3, 2025 | December 5, 2025 | 2d | 4,810 | — | — | derivative | Form 4 ↗ | |
| EHRMAN BRADLEY J | DMLP | Sell F | December 3, 2025 | December 5, 2025 | 2d | 1,749 | — | — | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Option / conversion M | December 3, 2025 | December 5, 2025 | 2d | 4,810 | — | — | Form 4 ↗ | ||
| Box Frank Damon | DMLP | Buy P | December 3, 2025 | December 3, 2025 | 0d | 5,000 | $22 | $110K | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Other A | December 1, 2025 | December 3, 2025 | 2d | 16,000 | — | — | derivative | Form 4 ↗ | |
| MORIYAMA LESLIE A | DMLP | Sell F | December 1, 2025 | December 3, 2025 | 2d | 6,456 | $22 | $140K | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Other A | December 1, 2025 | December 3, 2025 | 2d | 16,000 | $22 | $346K | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Other A | December 1, 2025 | December 3, 2025 | 2d | 18,000 | — | — | derivative | Form 4 ↗ | |
| EHRMAN BRADLEY J | DMLP | Sell F | December 1, 2025 | December 3, 2025 | 2d | 6,543 | $22 | $142K | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Other A | December 1, 2025 | December 3, 2025 | 2d | 18,000 | $22 | $389K | Form 4 ↗ | ||
| VAUGHN ROBERT C | DMLP | Buy P | November 28, 2025 | December 2, 2025 | 4d | 195 | $21 | $4,165 | Form 4 ↗ | ||
| DORCHESTER MINERALS OPERATING LP | DMLP | Other J | November 28, 2025 | December 2, 2025 | 4d | 58,000 | $22 | $1.3M | Form 4 ↗ | ||
| VAUGHN ROBERT C | DMLP | Buy P | November 25, 2025 | November 28, 2025 | 3d | 352 | $21 | $7,529 | Form 4 ↗ | ||
| VAUGHN ROBERT C | DMLP | Buy P | November 25, 2025 | November 28, 2025 | 3d | 4,263 | $21 | $91K | Form 4 ↗ | ||
| MORIYAMA LESLIE A | DMLP | Buy P | November 25, 2025 | November 28, 2025 | 3d | 3,041 | $22 | $65K | Form 4 ↗ | ||
| EHRMAN BRADLEY J | DMLP | Buy P | November 26, 2025 | November 26, 2025 | 0d | 2,487 | $22 | $54K | indirect | Form 4 ↗ | |
| EHRMAN BRADLEY J | DMLP | Buy P | November 25, 2025 | November 26, 2025 | 1d | 1,000 | $21 | $21K | indirect | Form 4 ↗ |
Federal contracts (USAspending, awards started in the last 180 days)
No contract award starting in the last 180 days was found for a recipient named exactly "DORCHESTER MINERALS, L.P.". Subsidiaries and differently-spelled recipients are not matched — search contracts.
Lobbying (Senate LDA, as client)
No LDA filing posted since October 2025 names "DORCHESTER MINERALS, L.P." as the client. Filings under a subsidiary or trade-association name are not matched — search lobbying.
Related companies
Companies whose stock was traded by the same people who traded DMLP, by number of filers in common. It shows overlap in public filings and nothing else.
- Warner Bros. Discovery, Inc. WBD 1 filer in common
- Liberty Media Corp FWONK 1 filer in common
- ENTERPRISE PRODUCTS PARTNERS L.P. EPD 1 filer in common
- CHARTER COMMUNICATIONS, INC. /MO/ CHTR 1 filer in common
- SIRIUS XM HOLDINGS INC. SIRI 1 filer in common
- Liberty Live Holdings, Inc. LLYVK 1 filer in common
- Fidelity National Financial, Inc. FNF 1 filer in common
- BERKSHIRE HATHAWAY INC BRK.B 1 filer in common
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| House Clerk, periodic transaction reports | 1 | 1 | April 15, 2026 | April 15, 2026 | House Clerk search |
| SEC EDGAR, Form 4 | 19 | 40 | November 26, 2025 | August 19, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Insiders and their transactions come from SEC EDGAR Form 4 filings for this issuer. Contracts and lobbying are matched by exact normalized name (suffixes like Inc./Corp. ignored) to USAspending recipients and LDA clients — a conservative match that misses subsidiaries on purpose. See methodology and corrections.
Not investment advice. Public records shown as filed; no recommendation is made or implied.