Introduction

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

Security Title Latest Reported Holdings
US:AMT / American Tower Corporation SVP, Pres. & CEO, CoreSite 23,425
US:COR / Cencora, Inc. SVP, General Management 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 Juan Font. 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 Juan Font 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
2025-08-01 2025-07-31 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale -720 23,425 -2.98 208.33 -149,998 4,880,130
2025-03-12 2025-03-11 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -981 24,104 -3.91 209.78 -205,794 5,056,537
2025-03-12 2025-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -874 25,085 -3.37 213.07 -186,223 5,344,861
2025-03-12 2025-03-10 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
A - Award 7,040 25,959 37.21
2025-01-07 2025-01-03 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
F - Taxes -469 18,919 -2.42 182.56 -85,621 3,453,853
2024-03-19 3 AMT AMERICAN TOWER CORP /MA/
Common Stock
19,805
2024-03-19 2024-03-15 4 AMT AMERICAN TOWER CORP /MA/
Common Stock
S - Sale -540 19,265 -2.73 197.49 -106,645 3,804,645
2021-12-29 2021-12-28 4 COR CoreSite Realty Corp
Common Stock
D - Sale to Issuer -30,735 0 -100.00
2021-12-29 2021-12-28 4 COR CoreSite Realty Corp
Common Stock
A - Award 177 30,735 0.58
2021-08-09 2021-08-05 4 COR CoreSite Realty Corp
Common Stock
S - Sale -600 30,558 -1.93 139.11 -83,466 4,250,923
2021-05-26 2021-05-24 4 COR CoreSite Realty Corp
Common Stock
S - Sale -400 31,158 -1.27 120.50 -48,198 3,754,383
2021-03-17 2021-03-17 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -971 31,558 -2.99 115.67 -112,316 3,650,314
2021-03-17 2021-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,750 32,529 13.03
2021-03-17 2021-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,215 28,779 12.58
2021-03-10 2021-03-10 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -234 25,564 -0.91 112.83 -26,402 2,884,386
2021-03-05 2021-03-05 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -762 25,798 -2.87 110.20 -83,972 2,842,940
2021-03-05 2021-03-03 4 COR CoreSite Realty Corp
Common Stock
D - Sale to Issuer -217 26,560 -0.81
2020-03-25 2020-03-23 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -52 26,777 -0.19 94.20 -4,898 2,522,367
2020-03-20 2020-03-19 4 COR CoreSite Realty Corp
Common Stock
S - Sale -1,000 26,829 -3.59 104.67 -104,670 2,808,191
2020-03-17 2020-03-17 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -636 27,829 -2.23 108.04 -68,713 3,006,645
2020-03-17 2020-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,805 28,465 15.43
2020-03-17 2020-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,261 24,660 15.24
2020-03-11 2020-03-09 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -249 21,399 -1.15 103.01 -25,649 2,204,311
2020-03-06 2020-03-05 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -114 21,648 -0.52 109.90 -12,529 2,379,115
2020-03-06 2020-03-04 4 COR CoreSite Realty Corp
Common Stock
D - Sale to Issuer -335 21,762 -1.52
2020-03-04 2020-03-03 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -336 22,097 -1.50 107.86 -36,241 2,383,382
2020-01-22 2019-05-02 4 COR CoreSite Realty Corp
Common Stock
S - Sale -1,515 22,433 -6.33 111.80 -169,377 2,508,009
2019-03-25 2019-03-21 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -47 23,948 -0.20 107.44 -5,050 2,572,973
2019-03-19 2019-03-19 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -287 23,995 -1.18 103.80 -29,791 2,490,681
2019-03-19 2019-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,925 24,282 19.28
2019-03-19 2019-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,365 20,357 19.80
2019-03-14 2019-03-12 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -229 16,992 -1.33 102.78 -23,537 1,746,438
2019-03-11 2019-03-07 4 COR CoreSite Realty Corp
Common Stock
D - Sale to Issuer -650 17,221 -3.64
2019-03-06 2019-03-05 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -314 17,871 -1.73 101.73 -31,943 1,818,017
2019-03-06 2019-03-05 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -342 18,185 -1.85 101.67 -34,771 1,848,869
2018-05-07 2018-05-03 4 COR CoreSite Realty Corp
Stock Option (Right to Buy)
M - Exercise -1,250 0 -100.00
2018-05-07 2018-05-03 4 COR CoreSite Realty Corp
Common Stock
S - Sale -200 18,527 -1.07 104.46 -20,892 1,935,330
2018-05-07 2018-05-03 4 COR CoreSite Realty Corp
Common Stock
S - Sale -1,050 18,727 -5.31 103.89 -109,084 1,945,548
2018-05-07 2018-05-03 4 COR CoreSite Realty Corp
Common Stock
M - Exercise 1,250 19,777 6.75 15.23 19,038 301,204
2018-03-22 2018-03-22 4 COR CoreSite Realty Corp
Common Stock
S - Sale X -48 18,527 -0.26 103.30 -4,958 1,913,771
2018-03-19 3 COR CoreSite Realty Corp
Common Stock
24,824
2018-03-19 3 COR CoreSite Realty Corp
Common Stock
24,824
2018-03-19 3 COR CoreSite Realty Corp
Common Stock
24,824
2018-03-19 2018-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 3,318 18,575 21.75
2018-03-19 2018-03-15 4 COR CoreSite Realty Corp
Common Stock
A - Award 2,845 15,257 22.92
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)