Insider trading

Period: 120 months Stock: AMT Type of trade: Sold × + Add filter Clear all
Views & alerts

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When

Period

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

214 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.

214 decisions over 120 months
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.

214 decisions over 120 months Remove this filter
The trade

Minimum amount

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

214 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.
214 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
214 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.

214 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
29 Jul 2026
Meyer Robert Joseph SVP & Advisor to the CFO
Sold at will
$894.45K 5,000 at 178.89
18.9%
Not planned
29 Jul 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$193.51K 1,106 at 174.96
3.8%
Planned (10b5-1)
28 Jul 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$116.13K 685 at 169.54
2.3%
Planned (10b5-1)
29 Apr 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$73.86K 416 at 177.54
1.4%
Planned (10b5-1)
28 Apr 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$99.23K 556 at 178.48
1.8%
Planned (10b5-1)
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)
4 Mar 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$128.56K 682 at 188.51
2.1%
Planned (10b5-1)
2 Mar 2026
Noel Eugene M EVP & Chief Operating Officer
Sold on a plan 4×
$7.87M 41,209 at 191.05
58.2%
Sold half or more
27 Feb 2026
Meyer Robert Joseph SVP & Chief Accounting Officer
Sold at will
$831.70K 4,454 at 186.73
15.4%
Not planned
27 Feb 2026
Dowling Ruth T EVP, Chief Admin Ofr, GC & Sec
Sold on a plan
$122.12K 656 at 186.16
2.0%
Planned (10b5-1)
17 Feb 2026
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 4×
$6.60M 34,341 at 192.09
31.6%
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
17 Mar 2025
Goel Sanjay EVP & President, Asia-Pacific
Sold at will
$863.68K 4,000 at 215.92
13.6%
Not planned
27 Feb 2025
Meyer Robert Joseph SVP & Chief Accounting Officer
Sold at will
$594.21K 2,939 at 202.18
10.1%
Not planned
26 Feb 2025
REEVE PAMELA D A Director
Sold at will
$1.01M 4,971 at 202.97
20.2%
Not planned
26 Feb 2025
Meyer Robert Joseph SVP & Chief Accounting Officer
Sold at will
$547.85K 2,724 at 201.12
8.5%
Not planned
13 Feb 2025
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 2×
$3.14M 16,568 at 189.70
20.9%
Planned (10b5-1)
16 Jan 2025
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 2×
$3.00M 16,567 at 181.10
20.9%
Planned (10b5-1)
13 Sep 2024
Goel Sanjay EVP & President, Asia-Pacific
Sold at will
$1.19M 5,000 at 238.00
21.2%
Not planned
10 Sep 2024
Noel Eugene M EVP & President, U.S. Tower
Sold on a plan
$7.95M 33,135 at 240.00
55.3%
Sold half or more
3 Sep 2024
Puech Olivier EVP & President, LatAm & EMEA
Sold on a plan
$4.37M 18,989 at 230.00
45.5%
Planned (10b5-1)
26 Aug 2024
Puech Olivier EVP & President, LatAm & EMEA
Sold on a plan 3×
$2.26M 9,988 at 226.35
19.3%
Planned (10b5-1)
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)
2 Aug 2024
Puech Olivier EVP & President, LatAm & EMEA
Sold on a plan 6×
$2.33M 10,005 at 233.27
16.2%
Planned (10b5-1)
2 Aug 2024
Goel Sanjay EVP & President, Asia-Pacific
Sold at will
$1.13M 4,792 at 235.39
16.9%
Not planned
2 Aug 2024
Meyer Robert Joseph SVP & Chief Accounting Officer
Sold at will
$508.02K 2,181 at 232.93
6.4%
Not planned
4 Jun 2024
Goel Sanjay EVP & President, Asia-Pacific
Sold at will
$702.06K 3,504 at 200.36
11.0%
Not planned
3 May 2024
HORMATS ROBERT D Director
Sold at will
$128.45K 700 at 183.50
8.7%
Not planned
15 Mar 2024
Font Juan SVP, Pres. & CEO, CoreSite
Sold at will
$106.64K 540 at 197.49
2.7%
Not planned
6 Mar 2024
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 2×
$2.37M 11,510 at 205.71
15.5%
Planned (10b5-1)
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)
1 Mar 2024
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 3×
$2.28M 11,509 at 197.67
15.5%
Planned (10b5-1)
1 Mar 2024
THOMPSON SAMME L Director
Sold on a plan
$502.62K 2,527 at 198.90
9.8%
Planned (10b5-1)
28 Feb 2024
REEVE PAMELA D A Director
Sold at will
$962.58K 5,054 at 190.46
21.4%
Not planned
26 Feb 2024
THOMPSON SAMME L Director
Sold on a plan 2×
$480.70K 2,527 at 190.22
9.8%
Planned (10b5-1)
9 Nov 2023
REED JOANN A Director
Sold at will
$891.42K 4,856 at 183.57
7.4%
Not planned
16 Oct 2023
HORMATS ROBERT D Director
Sold on a plan
$24.96K 150 at 166.39
2.1%
Planned (10b5-1)
2 Oct 2023
HORMATS ROBERT D Director
Sold on a plan
$24.54K 150 at 163.63
2.1%
Planned (10b5-1)
17 Aug 2023
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 2×
$1.78M 10,000 at 178.14
16.5%
Planned (10b5-1)
15 Aug 2023
HORMATS ROBERT D Director
Sold on a plan
$23.17K 125 at 185.34
1.7%
Planned (10b5-1)
10 Aug 2023
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan
$510.41K 2,727 at 187.17
5.1%
Planned (10b5-1)
3 Aug 2023
Smith Rodney M EVP, CFO & Treasurer
Sold on a plan 3×
$665.72K 3,524 at 188.91
6.2%
Planned (10b5-1)
1 Aug 2023
HORMATS ROBERT D Director
Sold on a plan
$23.84K 125 at 190.75
1.7%
Planned (10b5-1)
27 Feb 2023
DOLAN RAYMOND P Director
Sold, plan not stated 2×
$1.95M 10,025 at 195.00
36.5%
6 Feb 2023
THOMPSON SAMME L Director
Sold, plan not stated
$380.13K 1,739 at 218.59
7.3%
17 Jan 2023
DOLAN RAYMOND P Director
Sold, plan not stated
$378.72K 1,619 at 233.92
8.5%
17 Jan 2023
Smith Rodney M EVP, CFO & Treasurer
Sold, plan not stated
$368.19K 1,574 at 233.92
3.2%
13 Jan 2023
DOLAN RAYMOND P Director
Sold, plan not stated
$371.39K 1,620 at 229.25
8.5%
9 Jan 2023
Smith Rodney M EVP, CFO & Treasurer
Sold, plan not stated
$449.43K 2,035 at 220.85
4.0%
3 Jan 2023
THOMPSON SAMME L Director
Sold, plan not stated
$321.00K 1,500 at 214.00
6.4%
Showing 1–50 of 214. Page 1 of 5 Older →