Insider trading

Period: 120 months Stock: ATO + 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.

30 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.

30 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.

30 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.

30 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.
30 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
30 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.

30 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
11 Aug 2026
Bought
$50.28K 300 at 167.59
160%
First buy on file
3 Dec 2025
DONOHUE SEAN Director
Sold at will
$77.02K 450 at 171.15
33.9%
Not planned
14 May 2025
COCKLIN KIM R Director
Sold on a plan
$2.26M 15,000 at 150.98
8.0%
Planned (10b5-1)
11 Nov 2024
Geiser Edward Director
Bought
$362.23K 2,500 at 144.89
×25
First buy on file
16 May 2024
WALTERS DIANA J Director
Sold at will
$47.20K 400 at 118.00
10.1%
Not planned
27 Mar 2024
COCKLIN KIM R Director
Sold on a plan
$1.75M 15,000 at 116.46
7.5%
Planned (10b5-1)
17 Nov 2023
THOMAS RICHARD M VICE PRESIDENT & CONTROLLER
Sold at will
$199.85K 1,750 at 114.20
39.8%
Not planned
6 Nov 2023
COCKLIN KIM R Director
Sold on a plan
$1.39M 12,500 at 110.99
5.9%
Planned (10b5-1)
7 Aug 2023
COCKLIN KIM R Director
Sold at will
$1.47M 12,500 at 117.44
5.6%
Not planned
5 May 2023
WALTERS DIANA J Director
Sold at will
$45.83K 390 at 117.50
13.1%
Not planned
1 May 2023
COCKLIN KIM R Director
Sold on a plan
$1.43M 12,500 at 114.54
5.4%
Planned (10b5-1)
6 Feb 2023
COCKLIN KIM R Director
Sold, plan not stated
$1.46M 12,500 at 117.14
5.2%
15 Nov 2022
THOMAS RICHARD M VICE PRESIDENT & CONTROLLER
Sold, plan not stated
$121.41K 1,100 at 110.37
27.6%
14 Oct 2022
MCDILL JOHN S SR VP, UTILITY OPERATIONS
Sold, plan not stated
$202.08 2 at 101.04
0.0%
11 Feb 2022
Forsythe Christopher T SR VICE PRESIDENT & CFO
Sold, plan not stated
$11.55 0 at 105.00
0.0%
10 Feb 2022
THOMAS RICHARD M VICE PRESIDENT & CONTROLLER
Sold, plan not stated
$101.27K 950 at 106.61
25.2%
9 Sep 2021
DONOHUE SEAN Director
Sold, plan not stated
$133.14K 1,375 at 96.83
98.7%
Sold half or more
11 Aug 2021
ROBBINS J MATT SR VP, HUMAN RESOURCES
Sold, plan not stated
$455.05K 4,500 at 101.12
36.1%
4 Feb 2021
YOHO FRANK H Director
Bought
$43.90K 500 at 87.80
20.0%
First buy on file
10 Dec 2020
Bought
$48.71K 500 at 97.41
7.6%
First buy on file
26 Aug 2020
YOHO FRANK H Director
Bought
$149.22K 1,500 at 99.48
150%
First buy on file
18 Aug 2020
Bought
$51.50K 500 at 103.00
8.3%
First buy on file
11 Jun 2020
Bought 2×
$199.75K 2,000 at 99.88
50.0%
First buy on file
15 May 2020
YOHO FRANK H Director
Bought
$92.30K 1,000 at 92.30
opened
First buy on file
11 May 2020
Bought
$95.47K 1,000 at 95.47
33.3%
First buy on file
11 Nov 2019
PARK DAVID J SR VP, UTILITY OPERATIONS
Sold, plan not stated
$427.68K 4,000 at 106.92
28.5%
16 Aug 2018
DOUGLAS RICHARD W Retired Board Member
Sold, plan not stated
$3.26M 35,000 at 93.04
84.8%
Sold half or more
15 Aug 2018
QUINN NANCY K Director
Sold, plan not stated
$186.10K 2,000 at 93.05
100%
Sold half or more
15 Aug 2017
Bought
$132.18K 1,500 at 88.12
100%
First buy on file
16 Dec 2016
GREGORY LOUIS P Sr VP, GC & Corp. Secretary
Sold, plan not stated
$740.78K 10,000 at 74.08
11.6%
Showing 1–30 of 30.