Introduction

This page provides a comprehensive analysis of the known insider trading history of Shellee Spring. 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 Shellee Spring has reported holdings or trades in the following companies:

Security Title Latest Reported Holdings
US:CERN / Cerner Corp. 1,060
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Shellee Spring. 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 Shellee Spring 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
2006-01-17 2005-09-30 5 CERN CERNER CORP /MO/
Common Stock
J - Other 65 1,060 6.57 36.95 2,414 39,183
2006-01-17 2005-06-30 5 CERN CERNER CORP /MO/
Common Stock
J - Other 295 2,715 12.20 28.89 8,527 78,439
2006-01-17 2005-04-26 5 CERN CERNER CORP /MO/
Common Stock
J - Other 49 4,586 1.09 29.85 1,477 136,893
2006-01-17 2005-04-25 5 CERN CERNER CORP /MO/
Common Stock
J - Other 12 4,537 0.26 29.88 356 135,552
2006-01-17 2005-04-11 5 CERN CERNER CORP /MO/
Common Stock
J - Other 45 4,525 1.02 27.86 1,267 126,056
2006-01-17 2005-03-29 5 CERN CERNER CORP /MO/
Common Stock
J - Other 48 4,479 1.09 26.32 1,267 117,869
2006-01-17 2005-03-21 5 CERN CERNER CORP /MO/
Common Stock
J - Other 568 2,420 30.67 22.32 12,677 54,013
2005-08-18 2005-08-12 4/A CERN CERNER CORP /MO/
Common Stock
S - Sale -5,331 0 -100.00 78.61 -419,070
2005-08-18 2005-08-12 4/A CERN CERNER CORP /MO/
Common Stock
X - Other 2,000 5,331 60.04 22.59 45,180 120,427
2005-08-18 2005-08-12 4/A CERN CERNER CORP /MO/
Common Stock
X - Other 2,400 3,331 257.79 46.23 110,952 153,992
2005-08-18 2005-08-12 4/A CERN CERNER CORP /MO/
Common Stock
X - Other 931 931 43.29 40,303 40,303
2005-08-18 2005-08-12 4/A CERN CERNER CORP /MO/
Common Stock
S - Sale -1,720 132 -92.87 78.61 -135,209 10,377
2005-08-16 2005-08-12 4 CERN CERNER CORP /MO/
Common Stock
S - Sale -7,051 0 -100.00 78.61 -554,279
2005-08-16 2005-08-12 4 CERN CERNER CORP /MO/
Common Stock
X - Other 2,000 7,051 39.60 22.59 45,180 159,282
2005-08-16 2005-08-12 4 CERN CERNER CORP /MO/
Common Stock
X - Other 430 5,051 9.31 13.25 5,698 66,926
2005-08-16 2005-08-12 4 CERN CERNER CORP /MO/
Common Stock
X - Other 1,290 4,621 38.73 24.31 31,363 112,348
2005-08-16 2005-08-12 4 CERN CERNER CORP /MO/
Common Stock
X - Other 2,400 3,331 257.79 46.23 110,952 153,992
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
S - Sale -4,500 0 -100.00 78.00 -351,000
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 589 4,500 15.06 43.29 25,498 194,805
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 790 3,911 25.31 28.62 22,614 111,952
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 500 3,121 19.08 21.00 10,500 65,541
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 625 2,621 31.31 15.00 9,375 39,315
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 96 1,996 5.05 17.04 1,636 34,012
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 180 1,900 10.47 23.56 4,241 44,769
2005-08-09 2005-08-05 4 CERN CERNER CORP /MO/
Common Stock
X - Other 1,720 1,720 22.00 37,840 37,840
2005-06-07 2005-06-03 4 CERN CERNER CORP /MO/
Non-Qualified Stock Option (right to buy)
J - Other 12,500 12,500 62.81 785,125 785,125
2005-03-21 3 CERN CERNER CORP /MO/
Common Stock
4,431
2005-03-21 3 CERN CERNER CORP /MO/
Common Stock
1,852
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)