Dorchester Minerals, L.P. - Limited Partnership
US ˙ NasdaqGS ˙ US25820R1059

Introduction

This page provides a comprehensive analysis of the known insider trading history of Robert C Vaughn. Insiders are officers, directors, or significant investors in a company. It is illegal for insiders to make trades in their companies based on specific, non-public information. This does not mean it is illegal for them to make any trades in their own companies. However, they must report all trades to the SEC via a Form 4. Despite these restrictions, academic research suggests that insiders - in general - tend to outperform the market in their own companies.

Average Trade Profitability

The average trade profitability is the average return of all the open market purchases made by the insider in the last three years. To calculate this, we examine every open-market, unplanned purchase made by the insider, excluding all trades that were marked as part of a 10b5-1 trading plan. We then calculate the average performance of those trades over 3, 6, and 12 months, averaging each of those durations to generate a final performance metric for each trade. Finally, we average all of the performance metrics to calculate a performance metric for the insider. This list only includes insiders that have made at least three trades in the last two years.

If this insiders trade profitability is "N/A", then the insider either has not made any open-market purchases in the last three years, or the trades they’ve made are too recent to calculate a reliable performance metric.

Update Frequency: Daily

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Companies with Reported Insider Positions

The SEC filings indicate Robert C Vaughn has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:DMLP / Dorchester Minerals, L.P. - Limited Partnership Director 500,000
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Robert C Vaughn. Non-planned trade are trades that were not made as part of a 10b5-1 trading plan. The stock performance is charted as cumulative percent change in share price. For example, if an insider trade was made on January 1, 2019, the chart will show the daily percent change of the security to the present day. If the share price were to go from $10 to $15 during this time, the cumulative percent change in share price would be 50%. A change in price from $10 to $20 would be 100%, and a change in price of $10 to $5 would be -50%.

Ultimately, we are trying to determine how closely the insider’s trades correlate to excess returns (positive or negative) in the share price in order to see if the insider is timing their trades to profit from insider information. Consider the situation where an insider was doing this. In this situation, we would expect either (a) positive returns after purchases, or (b) negative returns after sales. In the case of (a), the PURCHASE chart would show a series of upwardly sloping curves, indicating positive returns after each purchase transaction. In the case of (b), the SALE chart would show a series of downward sloping curves, indicating negative returns after each sale transaction.

However, this alone is not enough to draw conclusions. If, for example, the share price of the company was in a non-cyclical climb over many years, then we would expect all the post-purchase plots to be upwardly sloping. Likewise, non-cyclical declines over many years would result in downward sloping post-trade plots. Neither of these charts would suggest insider trading activity.

The strongest indicator would be a situation where the share price was extremely cyclical, and there were both positive signals in the PURCHASE chart and negative plots on the SALE chart. This situation would be highly suggestive of an insider that was timing trades to their financial advantage.

Insider Purchases DMLP / Dorchester Minerals, L.P. - Limited Partnership - Short Term Profit Analysis

In this section, we analyze the profitability of every unplanned, open-market insider purchase made in DMLP / Dorchester Minerals, L.P. - Limited Partnership. This analysis helps to understand if the insider consistently generates abnormal returns, and is worth following. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market purchases that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares		 Reported
Price		 Adjusted
Shares		 Adjusted
Price		 Cost Basis Days to
Max		 Price at
Max		 Max
Profit ($)		 Max Return (%)
2020-03-04 DMLP VAUGHN ROBERT C 653 14.8100 653 14.8100 9,671 357 14.8000 -6 -0.06
2020-03-04 DMLP VAUGHN ROBERT C 1,200 14.8200 1,200 14.8200 17,784
2020-03-04 DMLP VAUGHN ROBERT C 500 14.7700 500 14.7700 7,385
2020-03-04 DMLP VAUGHN ROBERT C 9,770 14.7500 9,770 14.7500 144,108
2020-03-04 DMLP VAUGHN ROBERT C 667 14.7300 667 14.7300 9,825
2017-12-19 DMLP VAUGHN ROBERT C 2,000 14.5922 2,000 14.5922 29,184
2017-12-19 DMLP VAUGHN ROBERT C 475 14.6399 475 14.6399 6,954
2017-12-19 DMLP VAUGHN ROBERT C 200 14.5750 200 14.5750 2,915
2017-12-19 DMLP VAUGHN ROBERT C 2,398 14.5999 2,398 14.5999 35,011
2017-12-19 DMLP VAUGHN ROBERT C 700 14.6000 700 14.6000 10,220
2017-12-19 DMLP VAUGHN ROBERT C 1,702 14.6000 1,702 14.6000 24,849
2017-12-06 DMLP VAUGHN ROBERT C 2,900 14.7499 2,900 14.7499 42,775
2017-12-06 DMLP VAUGHN ROBERT C 1,100 14.7500 1,100 14.7500 16,225
2017-12-06 DMLP VAUGHN ROBERT C 186 14.7000 186 14.7000 2,734
2017-12-05 DMLP VAUGHN ROBERT C 2,000 14.6500 2,000 14.6500 29,300
2017-06-30 DMLP VAUGHN ROBERT C 51,339 14.9800 51,339 14.9800 769,058
2015-08-12 DMLP VAUGHN ROBERT C 2,278 14.9000 2,278 14.9000 33,942

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

DMLP / Dorchester Minerals, L.P. - Limited Partnership Insider Trades
Insider Sales DMLP / Dorchester Minerals, L.P. - Limited Partnership - Short Term Loss Analysis

In this section, we analyze the short-term loss avoidance of every unplanned, open-market insider sale made in DMLP / Dorchester Minerals, L.P. - Limited Partnership. A consistent pattern of loss avoidance may suggest that future sale transactions may predict declines in price. This analysis is for one-year following each trade, and the results are theoretical.

The following table shows the most recent open market sales that were not part of an automatic trading plan.

Trade Date Ticker Insider Reported
Shares		 Reported
Price		 Adjusted
Shares		 Adjusted
Price		 Cost Basis Days to
Min		 Price at
Min		 Max Loss
Avoided ($)		 Max Loss
Avoided (%)
There are no known unplanned open-market trades for this insider and security combination

Adjusted Price is the split-adjusted price. Adjusted Shares is the split-adjusted shares.

DMLP / Dorchester Minerals, L.P. - Limited Partnership Insider Trades
Insider Trading History

This table shows the complete list of insider trades made by Robert C Vaughn as disclosed to the Securities Exchange Commission (SEC).

File Date Tran Date Form Ticker Security Code 10b5-1 Shares Remaining Shares Percent
Change		 Share
Price		 Tran
Value		 Remaining
Value
2020-03-04 2020-03-04 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 667 500,000 0.13 14.73 9,825 7,365,000
2020-03-04 2020-03-04 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 9,770 499,333 2.00 14.75 144,108 7,365,162
2020-03-04 2020-03-04 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 500 489,563 0.10 14.77 7,385 7,230,846
2020-03-04 2020-03-04 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 1,200 489,063 0.25 14.82 17,784 7,247,914
2020-03-04 2020-03-04 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 653 487,863 0.13 14.81 9,671 7,225,251
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 1,702 15,737 12.13 14.60 24,849 229,760
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 700 14,035 5.25 14.60 10,220 204,911
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 2,398 13,335 21.93 14.60 35,011 194,690
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 200 10,937 1.86 14.58 2,915 159,407
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 475 487,210 0.10 14.64 6,954 7,132,706
2017-12-20 2017-12-19 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 2,000 486,735 0.41 14.59 29,184 7,102,534
2017-12-06 2017-12-06 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 186 484,735 0.04 14.70 2,734 7,125,604
2017-12-06 2017-12-06 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 1,100 484,549 0.23 14.75 16,225 7,147,098
2017-12-06 2017-12-06 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 2,900 483,449 0.60 14.75 42,775 7,130,824
2017-12-06 2017-12-05 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 2,000 480,549 0.42 14.65 29,300 7,040,043
2017-07-05 2017-06-30 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 51,339 478,549 12.02 14.98 769,058 7,168,664
2015-08-12 2015-08-12 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		P - Purchase 2,278 20,001 12.85 14.90 33,942 298,010
2014-12-12 2014-12-10 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		W - Other 875 10,737 8.87
2014-12-12 2014-06-09 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		G - Gift -9,863 0 -100.00
2014-12-12 2014-06-09 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		G - Gift -9,862 0 -100.00
2014-12-12 2014-06-09 4 DMLP DORCHESTER MINERALS, L.P.
Common Units 		G - Gift -9,861 0 -100.00
P
Open market or private purchase of non-derivative or derivative security
S
Open market or private sale of non-derivative or derivative security
A
Grant, award, or other acquisition of securities from the company (such as an option)
C
Conversion of derivative
D
Sale or transfer of securities back to the company
F
Payment of exercise price or tax liability using portion of securities received from the company
G
Gift of securities by or to the insider
K
Equity swaps and similar hedging transactions
M
Exercise or conversion of derivative security received from the company (such as an option)
V
A transaction voluntarily reported on Form 4
J
Other (accompanied by a footnote describing the transaction)