Insider trading

Period: 120 months Stock: AMT Role: CEO × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

26 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

26 decisions over 120 months Remove this filter
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

26 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

26 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
26 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
26 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

26 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
4 Mar 2026
Vondran Steven O President and CEO
Sold on a plan 3×
$6.31M 33,482 at 188.46
24.1%
Planned (10b5-1)
31 Jul 2025
Font Juan SVP, Pres. & CEO, CoreSite
Sold at will
$150.00K 720 at 208.33
3.0%
Not planned
2 Aug 2024
Vondran Steven O President and CEO
Sold on a plan
$4.95M 21,537 at 230.00
25.8%
Planned (10b5-1)
15 Mar 2024
Font Juan SVP, Pres. & CEO, CoreSite
Sold at will
$106.64K 540 at 197.49
2.7%
Not planned
4 Mar 2024
Vondran Steven O President and CEO
Sold on a plan 3×
$654.38K 3,265 at 200.42
5.3%
Planned (10b5-1)
10 May 2021
Sharma Amit Spl. Adv. to CEO & Chm. APAC
Sold, plan not stated 3×
$10.01M 40,276 at 248.48
14.6%
1 Aug 2019
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 5×
$12.17M 57,438 at 211.89
22.5%
1 Jul 2019
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 6×
$11.57M 57,438 at 201.40
22.5%
3 Jun 2019
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 3×
$11.94M 57,439 at 207.93
22.5%
1 May 2019
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$11.16M 57,439 at 194.31
22.5%
17 Apr 2019
TAICLET JAMES D JR Chairman, President and CEO · indirect
Sold, plan not stated 4×
$1.64M 8,580 at 190.73
100%
Sold half or more
16 Apr 2019
TAICLET JAMES D JR Chairman, President and CEO · indirect
Sold, plan not stated 2×
$2.31M 11,863 at 195.11
58.0%
Sold half or more
15 Apr 2019
TAICLET JAMES D JR Chairman, President and CEO · indirect
Sold, plan not stated 2×
$2.32M 11,863 at 195.88
36.7%
6 Aug 2018
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$6.60M 43,808 at 150.65
19.6%
9 Jul 2018
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 3×
$6.25M 43,843 at 142.66
19.6%
11 Jun 2018
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$6.09M 43,843 at 138.92
19.6%
29 May 2018
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$5.94M 43,843 at 135.53
19.6%
11 Dec 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$4.94M 34,667 at 142.52
11.4%
13 Nov 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 3×
$5.14M 34,000 at 151.20
11.2%
16 Oct 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$4.74M 34,000 at 139.40
11.2%
11 Sep 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$4.96M 34,000 at 145.89
11.2%
7 Mar 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$8.00M 69,760 at 114.62
21.5%
7 Feb 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated
$4.13M 40,000 at 103.33
14.2%
10 Jan 2017
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$4.17M 40,000 at 104.13
14.2%
5 Dec 2016
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated 2×
$4.07M 40,000 at 101.82
15.0%
17 Oct 2016
TAICLET JAMES D JR Chairman, President and CEO
Sold, plan not stated
$4.61M 40,625 at 113.45
15.2%
Showing 1–26 of 26.