Introduction

This page provides a comprehensive analysis of the known insider trading history of Jeff Shell. 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

See the list of most profitable insider traders.

Companies with Reported Insider Positions

The SEC filings indicate Jeff Shell has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:CMCSA / Comcast Corporation CEO - NBCUniversal 407,812
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Jeff Shell. 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 Trading History

This table shows the complete list of insider trades made by Jeff Shell 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
2022-12-21 2022-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,219 407,812 -1.02 34.41 -145,176 14,032,825
2022-12-21 2022-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 8,508 412,031 2.11
2022-03-03 2022-03-02 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -16,537 85,682 -16.18
2022-03-03 2022-03-02 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -8,200 403,043 -1.99 46.38 -380,316 18,693,133
2022-03-03 2022-03-02 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 16,537 411,243 4.19
2022-03-03 2022-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -46,462 102,219 -31.25
2022-03-03 2022-03-01 4 CMCSA COMCAST CORP
Option to Purchase
A - Award 475,600 475,600
2022-03-03 2022-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -23,038 394,706 -5.51
2022-03-03 2022-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 46,462 417,744 12.51
2022-02-24 2022-02-22 4 CMCSA COMCAST CORP
Restricted Stock Units
A - Award 93,711 93,711
2022-01-05 2022-01-03 4 CMCSA COMCAST CORP
Phantom Stock
I - Other -81,243 76,519 -51.50 50.74 -4,122,284 3,882,554
2021-12-21 2021-12-20 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -8,508 148,681 -5.41
2021-12-21 2021-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,219 371,282 -1.12 48.40 -204,200 17,970,047
2021-12-21 2021-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 8,508 375,501 2.32
2021-03-17 2021-03-04 4 CMCSA COMCAST CORP
Phantom Stock
A - Award 77,622 157,762 96.86 53.93 4,186,131 8,508,098
2021-03-17 2021-02-26 4 CMCSA COMCAST CORP
Phantom Stock
I - Other 80,140 80,140 52.72 4,224,997 4,224,997
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -29,728 157,189 -15.90
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -10,263 186,917 -5.20
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -9,978 197,180 -4.82
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -9,591 207,158 -4.42
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Option to Purchase
A - Award 356,700 356,700 54.45 19,422,315 19,422,315
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -14,740 366,993 -3.86 54.45 -802,593 19,982,767
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -5,089 381,733 -1.32 54.45 -277,096 20,785,360
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,948 386,822 -1.26 54.45 -269,419 21,062,456
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,756 391,770 -1.20 54.45 -258,964 21,331,875
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 9,591 396,526 2.48
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 9,978 386,935 2.65
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 10,263 376,957 2.80
2021-03-03 2021-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 29,728 366,694 8.82
2021-02-01 2021-01-29 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -20 216,749 -0.01
2021-02-01 2021-01-29 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -10 336,966 0.00 49.57 -496 16,703,403
2021-02-01 2021-01-29 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 20 336,976 0.01
2020-12-21 2020-12-20 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -8,508 216,769 -3.78
2020-12-21 2020-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,219 336,956 -1.24 50.90 -214,747 17,151,059
2020-12-21 2020-12-20 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 8,508 341,175 2.56
2020-12-03 2020-12-02 4 CMCSA COMCAST CORP
Option to Purchase
M - Exercise -15,500 0 -100.00 12.51 -193,905
2020-12-03 2020-12-02 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -9,918 332,667 -2.90 51.23 -508,099 17,042,529
2020-12-03 2020-12-02 4 CMCSA COMCAST CORP
Class A Common Stock
S - Sale -5,582 342,585 -1.60 51.22 -285,938 17,548,915
2020-12-03 2020-12-02 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 15,500 348,167 4.66 12.51 193,905 4,355,569
2020-08-04 2020-08-03 4 CMCSA COMCAST CORP
Option to Purchase
M - Exercise -294,500 15,500 -95.00 12.51 -3,684,195 193,905
2020-08-04 2020-08-03 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -195,016 332,667 -36.96 42.98 -8,381,788 14,298,026
2020-08-04 2020-08-03 4 CMCSA COMCAST CORP
Class A Common Stock
S - Sale -99,484 527,683 -15.86 42.91 -4,268,560 22,641,293
2020-08-04 2020-08-03 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 294,500 627,167 88.53 12.51 3,684,195 7,845,859
2020-03-04 2020-03-02 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -29,408 225,277 -11.55
2020-03-04 2020-03-02 4 CMCSA COMCAST CORP
Option to Purchase
A - Award 574,300 574,300
2020-03-04 2020-03-02 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -14,581 332,667 -4.20 42.52 -619,984 14,145,000
2020-03-04 2020-03-02 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 29,408 347,248 9.25
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -11,148 254,685 -4.19
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -10,263 265,833 -3.72
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -9,978 276,096 -3.49
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Restricted Stock Units
M - Exercise -9,591 286,074 -3.24
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -5,528 317,840 -1.71 40.43 -223,497 12,850,270
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -5,089 323,368 -1.55 40.43 -205,748 13,073,767
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,948 328,457 -1.48 40.43 -200,048 13,279,515
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
F - Taxes -4,756 333,405 -1.41 40.43 -192,285 13,479,563
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 9,591 338,161 2.92
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 9,978 328,570 3.13
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 10,263 318,592 3.33
2020-03-04 2020-03-01 4 CMCSA COMCAST CORP
Class A Common Stock
M - Exercise 11,148 308,329 3.75
2020-02-26 3 CMCSA COMCAST CORP
Class A Common Stock
594,362
2020-02-26 3 CMCSA COMCAST CORP
Class A Common Stock
594,362
2020-02-26 3 CMCSA COMCAST CORP
Class A Common Stock
594,362
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)