Introduction

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

Security Title Latest Reported Holdings
US:AMT / American Tower Corporation Former Officer 0
How to Interpret the Charts

The following charts show the stock performance of securities subsequent to each open-market, non-planned trade made by Marshall Steven C.. 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 Marshall Steven C. 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
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -30,000 0 -100.00
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -71,798 0 -100.00
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -61,368 0 -100.00
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -30,000 104,835 -22.25 160.00 -4,800,000 16,773,600
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 30,000 134,835 28.62 43.11 1,293,300 5,812,737
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -71,798 104,835 -40.65 158.00 -11,344,084 16,563,930
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 71,798 176,633 68.49 62.00 4,451,476 10,951,246
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -61,368 104,835 -36.92 154.00 -9,450,672 16,144,590
2018-11-01 2018-10-30 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 61,368 166,203 58.54 50.78 3,116,267 8,439,788
2018-03-13 2018-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 11,856 104,694 12.77
2018-03-13 2018-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -13,118 92,838 -12.38 143.58 -1,883,482 13,329,680
2018-03-01 2018-02-27 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 6,468 105,956 6.50
2017-06-29 2017-06-27 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -17,162 0 -100.00
2017-06-29 2017-06-27 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -20,548 99,446 -17.12 134.92 -2,772,336 13,417,254
2017-06-29 2017-06-27 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 17,162 119,994 16.69 28.39 487,229 3,406,630
2017-03-14 2017-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,004 102,640 -1.92 113.58 -227,614 11,657,851
2017-03-14 2017-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -4,728 104,644 -4.32 113.58 -537,006 11,885,466
2017-03-14 2017-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 14,087 109,372 14.78
2017-03-01 2017-02-27 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 5,539 95,285 6.17
2016-07-13 2016-07-12 4 AMT AMERICAN TOWER CORP /MA/
Option to purchase common stock
M - Exercise -50,000 0 -100.00
2016-07-13 2016-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -25,000 89,689 -21.80 116.00 -2,900,000 10,403,924
2016-07-13 2016-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -25,000 114,689 -17.90 115.00 -2,875,000 13,189,235
2016-07-13 2016-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 50,000 139,689 55.75 44.92 2,246,000 6,274,830
2016-07-12 2016-07-11 4 AMT AMERICAN TOWER CORP /MA/
Option to purchase common stock
M - Exercise -50,000 50,000 -50.00
2016-07-12 2016-07-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -25,000 89,689 -21.80 114.00 -2,850,000 10,224,546
2016-07-12 2016-07-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -25,000 114,689 -17.90 113.68 -2,842,000 13,037,846
2016-07-12 2016-07-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 50,000 139,689 55.75 44.92 2,246,000 6,274,830
2016-07-12 2016-07-08 4 AMT AMERICAN TOWER CORP /MA/
Option to purchase common stock
M - Exercise -50,000 100,000 -33.33
2016-07-12 2016-07-08 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -50,000 89,689 -35.79 112.81 -5,640,500 10,117,816
2016-07-12 2016-07-08 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 50,000 139,689 55.75 44.92 2,246,000 6,274,830
2016-03-14 2016-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,231 89,501 -2.43 98.46 -219,664 8,812,268
2016-03-14 2016-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,036 91,732 -2.17 98.46 -200,465 9,031,933
2016-03-14 2016-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,941 93,768 -3.04 94.71 -278,542 8,880,767
2016-03-14 2016-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 15,500 96,709 19.09
2016-03-01 2016-02-26 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 4,617 81,209 6.03
2015-03-13 2015-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,280 81,387 -2.73 96.27 -219,496 7,835,126
2015-03-12 2015-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,081 78,627 -2.58 94.63 -196,925 7,440,473
2015-03-12 2015-03-10 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
A - Award 121,604 121,604
2015-03-12 2015-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -4,550 80,708 -5.34 94.57 -430,294 7,632,556
2015-03-12 2015-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 9,702 85,258 12.84
2014-03-13 2014-03-12 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,041 10,080 -33.34
2014-03-13 2014-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,293 26,633 -7.93 80.84 -185,366 2,153,012
2014-03-13 2014-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,041 28,926 21.11
2014-03-12 2014-03-11 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -4,552 13,654 -25.00
2014-03-12 2014-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,098 23,885 -8.07 81.70 -171,407 1,951,404
2014-03-12 2014-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 4,552 25,983 21.24
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
A - Award 19,710 19,710
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
A - Award 107,817 107,817
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,169 5,169 -50.00
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,219 0 -100.00
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,420 21,431 -10.15 81.18 -196,456 1,739,769
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,169 23,851 27.67
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,896 18,682 -9.21 81.18 -153,917 1,516,605
2014-03-12 2014-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,219 20,578 33.98
2013-03-14 2013-03-12 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,041 15,121 -25.00
2013-03-14 2013-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,330 15,027 -13.42 76.03 -177,150 1,142,503
2013-03-14 2013-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,041 17,357 40.93
2013-03-13 2013-03-11 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
A - Award 18,206 18,206
2013-03-13 2013-03-11 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
A - Award 72,539 72,539
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,170 10,338 -33.34
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,219 5,219 -50.00
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,283 0 -100.00
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,423 12,316 -16.44 77.14 -186,910 950,056
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,170 14,739 54.03
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,446 9,569 -20.36 77.14 -188,684 738,153
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,219 12,015 76.80
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,897 6,796 -21.82 77.14 -146,335 524,243
2013-03-12 2013-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,283 8,693 154.93
2012-08-02 2012-08-01 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -30,000 30,000 -50.00
2012-08-02 2012-08-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -30,000 3,410 -89.79 74.00 -2,220,000 252,340
2012-08-02 2012-08-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 30,000 33,410 879.77 43.11 1,293,300 1,440,305
2012-07-12 2012-07-10 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -32,500 0 -100.00
2012-07-12 2012-07-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -32,500 3,410 -90.50 72.00 -2,340,000 245,520
2012-07-12 2012-07-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 32,500 35,910 953.08 37.70 1,225,250 1,353,807
2012-07-02 2012-06-29 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -51,488 17,162 -75.00
2012-07-02 2012-06-29 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -51,488 3,410 -93.79 70.13 -3,610,853 239,143
2012-07-02 2012-06-29 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 51,488 54,898 1,509.91 28.39 1,461,744 1,558,554
2012-06-20 2012-06-19 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -14,272 3,410 -80.71 69.00 -984,768 235,290
2012-06-15 2012-06-14 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -7,564 17,682 -29.96 67.00 -506,788 1,184,694
2012-03-20 2012-03-17 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -2,322 0 -100.00
2012-03-20 2012-03-17 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -981 24,819 -3.80 63.34 -62,137 1,572,035
2012-03-20 2012-03-17 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 2,322 25,800 9.89
2012-03-14 2012-03-12 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
A - Award 20,162 20,162
2012-03-14 2012-03-12 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
A - Award 71,798 71,798
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,170 15,508 -25.00
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,219 10,438 -33.33
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,284 5,283 -50.00
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,187 23,478 -8.52 62.22 -136,075 1,460,801
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,170 25,665 25.23
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,844 20,495 -8.25 62.22 -114,734 1,275,199
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,219 22,339 30.48
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,707 17,120 -9.07 62.22 -106,210 1,065,206
2012-03-13 2012-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 5,284 18,827 39.02
2010-03-12 2010-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
M - Exercise -5,284 21,135 -20.00
2010-03-12 2010-03-10 4 AMT AMERICAN TOWER CORP /MA/
Restricted Stock Units
A - Award 20,877 20,877
2010-03-12 2010-03-10 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Class A Common Stock
A - Award 60,000 60,000
2010-03-12 2010-03-10 4 AMT AMERICAN TOWER CORP /MA/
Class A Common Stock
F - Taxes -1,602 5,830 -21.56 43.11 -69,062 251,331
2010-03-12 2010-03-10 4 AMT AMERICAN TOWER CORP /MA/
Class A Common Stock
M - Exercise 5,284 7,432 246.00
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)