Introduction

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

Security Title Latest Reported Holdings
US:AMT / American Tower Corporation President and CEO, Director 80,748
US:AEE / Ameren Corporation Director 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 Steven O Vondran. 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 Steven O Vondran 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
2025-03-12 2025-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,262 80,748 -2.72 209.78 -474,522 16,939,315
2025-03-12 2025-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -10,327 83,010 -11.06 213.07 -2,200,374 17,686,941
2025-03-12 2025-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 15,488 93,337 19.89
2025-03-03 2025-02-27 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 16,006 77,849 25.88
2025-01-07 3 AEE AMEREN CORP
No securities are beneficially owned.
0
2025-01-07 2025-01-03 4 AEE AMEREN CORP
Common Stock, $.01 Par Value
A - Award 1,911 1,911
2024-08-06 2024-08-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -21,537 61,843 -25.83 230.00 -4,953,510 14,223,890
2024-08-06 2024-08-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 21,537 83,380 34.83 94.57 2,036,754 7,885,247
2024-03-12 2024-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 14,511 61,843 30.66
2024-03-12 2024-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -11,040 47,332 -18.91 207.31 -2,288,702 9,812,397
2024-03-06 2024-03-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -650 58,372 -1.10 201.80 -131,170 11,779,470
2024-03-06 2024-03-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -919 59,022 -1.53 201.19 -184,894 11,874,636
2024-03-06 2024-03-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,696 59,941 -2.75 199.48 -338,318 11,957,031
2024-03-06 2024-03-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 3,265 61,637 5.59 81.18 265,053 5,003,692
2024-03-01 2024-02-28 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 15,904 58,372 37.45
2023-03-14 2023-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -586 42,468 -1.36 191.27 -112,084 8,122,854
2023-03-14 2023-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -6,102 43,054 -12.41 191.27 -1,167,130 8,234,939
2023-03-14 2023-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 10,457 49,156 27.02
2023-02-28 2023-02-24 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 9,646 38,699 33.20
2022-09-07 2022-09-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -188 29,053 -0.64 250.85 -47,160 7,287,945
2022-03-15 2022-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -766 29,241 -2.55 234.84 -179,887 6,866,956
2022-03-15 2022-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -4,843 30,007 -13.90 234.84 -1,137,330 7,046,844
2022-03-14 2022-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,483 34,850 -4.08 232.80 -345,242 8,113,080
2022-03-14 2022-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 7,904 36,333 27.80
2022-02-28 2022-02-24 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 10,254 28,429 56.42
2021-09-08 2021-09-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -196 18,175 -1.07 302.01 -59,194 5,489,032
2021-07-14 2021-07-13 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -816 18,371 -4.25 278.14 -226,962 5,109,710
2021-07-14 2021-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -300 19,187 -1.54 279.79 -83,937 5,368,331
2021-07-14 2021-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -6,268 19,487 -24.34 279.31 -1,750,715 5,442,914
2021-07-14 2021-07-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,478 25,755 -5.43 278.01 -410,899 7,160,148
2021-03-15 2021-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -785 27,233 -2.80 215.20 -168,932 5,860,542
2021-03-12 2021-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -638 28,018 -2.23 213.90 -136,468 5,993,050
2021-03-12 2021-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,589 28,656 -5.25 204.42 -324,823 5,857,860
2021-03-12 2021-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 8,219 30,245 37.31
2020-12-03 2020-12-01 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -1,500 3,265 -31.48
2020-12-03 2020-12-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,500 22,026 -6.38 232.00 -348,000 5,110,032
2020-12-03 2020-12-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 1,500 23,526 6.81 81.18 121,770 1,909,841
2020-11-04 2020-11-02 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -1,500 4,765 -23.94
2020-11-04 2020-11-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,500 22,026 -6.38 232.58 -348,870 5,122,807
2020-11-04 2020-11-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 1,500 23,526 6.81 81.18 121,770 1,909,841
2020-10-05 2020-10-01 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -1,500 6,265 -19.32
2020-10-05 2020-10-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,500 22,026 -6.38 242.19 -363,285 5,334,477
2020-10-05 2020-10-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 1,500 23,526 6.81 81.18 121,770 1,909,841
2020-09-09 2020-09-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -198 22,026 -0.89 249.98 -49,496 5,506,059
2020-09-03 2020-09-01 4 AMT AMERICAN TOWER CORP /MA/
Option to Purchase Common Stock
M - Exercise -1,500 7,765 -16.19
2020-09-03 2020-09-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,500 22,224 -6.32 248.44 -372,660 5,521,331
2020-09-03 2020-09-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
M - Exercise 1,500 23,724 6.75 81.18 121,770 1,925,914
2020-08-05 2020-08-03 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,334 22,224 -5.66 259.00 -345,506 5,756,016
2020-07-02 2020-07-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -288 23,558 -1.21 260.44 -75,007 6,135,446
2020-07-02 2020-07-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -540 23,846 -2.21 259.69 -140,233 6,192,568
2020-07-02 2020-07-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -560 24,386 -2.24 258.83 -144,945 6,311,828
2020-06-03 2020-06-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,369 24,946 -5.20 258.03 -353,243 6,436,816
2020-05-05 2020-05-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,154 26,315 -4.20 233.24 -269,159 6,137,711
2020-04-03 2020-04-01 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,229 27,469 -4.28 205.81 -252,940 5,653,395
2020-03-13 2020-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -808 28,698 -2.74 217.83 -176,007 6,251,285
2020-03-12 2020-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -658 29,506 -2.18 232.90 -153,248 6,871,947
2020-03-12 2020-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -1,737 30,164 -5.44 243.87 -423,602 7,356,095
2020-03-12 2020-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 5,741 31,901 21.95
2020-03-04 2020-03-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,278 26,160 -4.66 229.03 -292,700 5,991,425
2020-02-05 2020-02-03 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,267 27,438 -4.41 232.98 -295,186 6,392,505
2020-01-06 2020-01-02 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale X -1,261 28,705 -4.21 229.68 -289,626 6,592,964
2019-09-06 2019-09-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -203 29,966 -0.67 241.07 -48,937 7,223,904
2019-03-14 2019-03-12 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -824 30,169 -2.66 185.75 -153,058 5,603,892
2019-03-12 2019-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 6,049 30,993 24.25
2019-03-12 2019-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -2,035 24,944 -7.54 181.61 -369,576 4,530,080
2018-09-06 2018-09-04 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 1,857 26,979 7.39
2018-08-09 3 AMT AMERICAN TOWER CORP /MA/
Common Stock
50,244
2018-08-09 3 AMT AMERICAN TOWER CORP /MA/
Common Stock
50,244
2018-08-09 3 AMT AMERICAN TOWER CORP /MA/
Common Stock
50,244
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)