Stock Trading Canary

United States · SEC Form 4 · Snapshot date: 2026-10-18 · Built: 2026-10-18 · 中文

← United States · Coverage record

US · SEC FORM 4

DORCHESTER MINERALS, L.P.

DMLP · Nasdaq · CIK 0001172358 · Energy · Oil & Gas E&P

INSIDER SIGNAL

63.5 / 100

3 buyers · 7 purchase transaction lines · $673.2K gross purchase

WHY THIS SIGNAL?

Buyer breadthModerate
Purchase sizeModerate
RoleModerate
RecencyLow
ConvictionStrong
Score anatomy

Each bar shows the contribution to the current score; the weights and formula stay unchanged.

Cluster+21.0 / 35
Purchase size+15.8 / 25
Role+13.0 / 20
Recency+3.7 / 10
Conviction+10.0 / 10

What is holding the score back?

  • ⚠ Cluster breadth is moderate · 3 insider(s), not 4+
  • ⚠ Role scores low · most senior buyer: Chief Executive Officer (CEO, chair and 10% owners score lowest)
  • ⚠ Purchase activity is becoming less recent

Purchase-size comments are relative to the model scale. Average daily volume is a separate market-context diagnostic.

US-v1.2 ranks qualifying equity purchases under the current 180-day rules. The score is a research priority, not a return forecast or probability. Backtests have not shown that a higher US score is followed by better returns.

Insider activity timeline

Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.

AprMayJunJulAugSepOct
DORCHESTER MINERALS OPERATING LPOther
●●
EHRMAN BRADLEY JChief Executive Officer
●
MORIYAMA LESLIE AChief Financial Officer
●
● Purchase▼ Sale○ Other

—

Purchase breadth & concentration

QUALIFYING BUYERS3
PURCHASE CONCENTRATION62%Largest buyer: DORCHESTER MINERALS OPERATING LP · $419.0K
CLUSTER BUYING · 15D2 insidersPeak activity: 2026-05-12–2026-05-20

Roles in the peak window: Chief Executive Officer, Other. Concentration uses priced qualifying P lines only and does not change the saved score.

SIGNAL HISTORY

63.5 / 100

Latest recorded score

↓ -0.2 ptsversus the previous recorded snapshot
  1. 64.0
  2. 63.9
  3. 63.8
  4. 63.7
  5. 63.5

Only scores saved when a full US scoring run completed are shown; gaps are not reconstructed.

Recent Form 4 activity

21Purchases
0Sales
13Other Form 4 lines
19SEC filings · 365 days
BUYING7 qualifying P line(s) · 180 days
SELLING0 sale line(s) · context only
OTHER0 exercise / withholding / award / gift / other lines
10b5-1 / PLANNEDNot assessed

P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.

Market context

Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.

Price performance

1M
+0.3%
3M
+11.0%
6M
+6.9%
12M
+17.7%

Volatility & liquidity

Volatility
24.2%
Beta
—
Avg daily value
USD 4.9M

Valuation

Market cap
USD 1.5B
P/E
25.5×

Fundamentals

Profit margin
37.5%
ROE
—
Industry
Oil & Gas E&P

Market data

Price data up to: 2026-10-11 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, P/E, Profit margin · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-06 · Status: PASS

Short interest

Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.

Shares short
368,855
Previous report
387,275
Avg daily volume
94,629
Days to cover
3.9

FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.

Historical equity purchases

Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.

Transaction dateReporting ownerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-19MORIYAMA LESLIE APurchase (P)Common Units5,197USD 28.30USD 147,075SEC filing ↗
2026-06-01DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 27.56USD 206,720SEC filing ↗
2026-05-20DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 28.30USD 212,280SEC filing ↗
2026-05-12EHRMAN BRADLEY JPurchase (P)Common Units4,000USD 26.78USD 107,120SEC filing ↗
2026-02-13DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 25.29USD 126,450SEC filing ↗
2026-02-12DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 25.08USD 125,400SEC filing ↗
2026-02-11DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units10,000USD 25.29USD 252,900SEC filing ↗
2025-12-22DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units10,000USD 22.30USD 223,000SEC filing ↗
2025-12-19DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 22.23USD 111,150SEC filing ↗
2025-12-18DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units15,729USD 22.28USD 350,442SEC filing ↗
2025-12-17DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units4,271USD 22.19USD 94,773SEC filing ↗
2025-12-03Box Frank DamonPurchase (P)Common Units5,000USD 21.97USD 109,850SEC filing ↗
2025-11-28VAUGHN ROBERT CPurchase (P)Common Units195USD 21.36USD 4,165SEC filing ↗
2025-11-26EHRMAN BRADLEY JPurchase (P)Common Units2,487USD 21.60USD 53,719SEC filing ↗
2025-11-25VAUGHN ROBERT CPurchase (P)Common Units4,615USD 21.41USD 98,800SEC filing ↗

Form 4 evidence

34 transaction lines in the latest 365-day window; 348 in local history.

DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-19MORIYAMA LESLIE APurchase (P)Common Units5,197USD 28.30USD 147,075SEC filing ↗
2026-06-01DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 27.56USD 206,720SEC filing ↗
2026-05-20DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 28.30USD 212,280SEC filing ↗
Show recent Form 4 evidence (30 grouped rows)
DateOwnerTypeSecuritySharesAvg. priceApprox. valueSource
2026-08-19MORIYAMA LESLIE APurchase (P)Common Units5,197USD 28.30USD 147,075SEC filing ↗
2026-06-01DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 27.56USD 206,720SEC filing ↗
2026-05-20DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units7,500USD 28.30USD 212,280SEC filing ↗
2026-05-12EHRMAN BRADLEY JPurchase (P)Common Units4,000USD 26.78USD 107,120SEC filing ↗
2026-02-13DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 25.29USD 126,450SEC filing ↗
2026-02-12DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 25.08USD 125,400SEC filing ↗
2026-02-11DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units10,000USD 25.29USD 252,900SEC filing ↗
2025-12-22DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units10,000USD 22.30USD 223,000SEC filing ↗
2025-12-19DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units5,000USD 22.23USD 111,150SEC filing ↗
2025-12-18DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units15,729USD 22.28USD 350,442SEC filing ↗
2025-12-17DORCHESTER MINERALS OPERATING LPPurchase (P)Common Units4,271USD 22.19USD 94,773SEC filing ↗
2025-12-15MORIYAMA LESLIE AOption exercise / conversion (M)Common Units4,351USD 0.00USD 0SEC filing ↗
2025-12-15MORIYAMA LESLIE ATax withholding (F)Common Units1,756USD 0.00USD 0SEC filing ↗
2025-12-15EHRMAN BRADLEY JOption exercise / conversion (M)Common Units4,727USD 0.00USD 0SEC filing ↗
2025-12-15EHRMAN BRADLEY JTax withholding (F)Common Units1,719USD 0.00USD 0SEC filing ↗
2025-12-03MORIYAMA LESLIE AOption exercise / conversion (M)Common Units4,017USD 0.00USD 0SEC filing ↗
2025-12-03MORIYAMA LESLIE ATax withholding (F)Common Units1,621USD 0.00USD 0SEC filing ↗
2025-12-03EHRMAN BRADLEY JOption exercise / conversion (M)Common Units4,810USD 0.00USD 0SEC filing ↗
2025-12-03EHRMAN BRADLEY JTax withholding (F)Common Units1,749USD 0.00USD 0SEC filing ↗
2025-12-03Box Frank DamonPurchase (P)Common Units5,000USD 21.97USD 109,850SEC filing ↗
2025-12-01MORIYAMA LESLIE ATax withholding (F)Common Units6,456USD 21.63USD 139,643SEC filing ↗
2025-12-01MORIYAMA LESLIE AAward / grant (A)Common Units16,000USD 21.63USD 346,080SEC filing ↗
2025-12-01EHRMAN BRADLEY JTax withholding (F)Common Units6,543USD 21.63USD 141,525SEC filing ↗
2025-12-01EHRMAN BRADLEY JAward / grant (A)Common Units18,000USD 21.63USD 389,340SEC filing ↗
2025-11-28VAUGHN ROBERT CPurchase (P)Common Units195USD 21.36USD 4,165SEC filing ↗
2025-11-28DORCHESTER MINERALS OPERATING LPJ (J)Common Units58,000USD 21.95USD 1,273,100SEC filing ↗
2025-11-26EHRMAN BRADLEY JPurchase (P)Common Units2,487USD 21.60USD 53,719SEC filing ↗
2025-11-25VAUGHN ROBERT CPurchase (P)Common Units4,615USD 21.41USD 98,800SEC filing ↗
2025-11-25MORIYAMA LESLIE APurchase (P)Common Units3,041USD 21.50USD 65,382SEC filing ↗
2025-11-25EHRMAN BRADLEY JPurchase (P)Common Units1,000USD 21.26USD 21,260SEC filing ↗

Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.

Snapshot & identity

Snapshot date2026-10-18
Ranking versionUS-v1.2
Data qualityPASS ELIGIBLE · —
TickerDMLP
CIK0001172358
SectorEnergy
IndustryOil & Gas E&P Yahoo Finance
SEC SIC1311 Crude Petroleum & Natural Gas
ExchangeNasdaq

Data coverage

Local Form 4 history348 transaction lines from 2020-02-14 to 2026-08-19
279 P purchase lines · 7 S sale lines · 62 other lines
SEC company submissionsOpen SEC filings ↗

Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.