Insider trading

Period: 120 months Stock: NGS Minimum amount: $100K × + 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.

44 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.

44 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.

44 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.

44 decisions over 120 months Remove this filter
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.
44 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
44 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.

44 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
6 Mar 2026
Sold on a plan
$1.12M 30,000 at 37.23
14.6%
Planned (10b5-1)
5 Mar 2026
Sold on a plan
$2.63M 70,000 at 37.58
25.4%
Planned (10b5-1)
11 Dec 2025
Sold at will
$335.40K 10,000 at 33.54
3.5%
Not planned
10 Dec 2025
Sold at will
$331.60K 10,000 at 33.16
3.4%
Not planned
8 Dec 2025
HOLLEY JEAN K Director
Bought 2×
$100.09K 3,125 at 32.03
27.7%
Largest buy in 3 yrs
4 Dec 2025
Sold at will
$642.40K 20,000 at 32.12
6.3%
Not planned
20 Nov 2025
Sold at will
$313.70K 10,000 at 31.37
3.1%
Not planned
19 Nov 2025
Sold at will
$303.10K 10,000 at 30.31
3.0%
Not planned
17 Nov 2025
Sold on a plan
$310.07K 10,000 at 31.01
2.9%
Planned (10b5-1)
10 Nov 2025
Sold on a plan 2×
$558.09K 18,748 at 29.77
5.1%
Planned (10b5-1)
7 Nov 2025
Sold on a plan 2×
$324.05K 11,152 at 29.06
3.0%
Planned (10b5-1)
26 Sep 2025
Sold on a plan
$225.59K 7,915 at 28.50
2.1%
Planned (10b5-1)
23 Sep 2025
Sold on a plan 2×
$320.22K 11,457 at 27.95
2.9%
Planned (10b5-1)
17 Sep 2025
Sold on a plan
$180.25K 6,553 at 27.51
1.6%
Planned (10b5-1)
4 Sep 2025
Sold on a plan
$270.02K 10,000 at 27.00
2.4%
Planned (10b5-1)
22 Aug 2025
Sold on a plan 2×
$525.06K 20,000 at 26.25
4.6%
Planned (10b5-1)
15 May 2025
Sold at will
$622.50K 25,000 at 24.90
5.5%
Not planned
21 Jan 2025
Sold on a plan 2×
$558.65K 19,400 at 28.80
4.2%
Planned (10b5-1)
12 Dec 2024
Sold at will
$271.50K 10,000 at 27.15
2.1%
Not planned
22 Nov 2024
Sold on a plan
$280.00K 10,000 at 28.00
2.1%
Planned (10b5-1)
21 Nov 2024
Sold on a plan
$1.03M 38,479 at 26.89
7.4%
Planned (10b5-1)
19 Nov 2024
Sold on a plan
$166.16K 6,516 at 25.50
1.2%
Planned (10b5-1)
15 Nov 2024
Sold on a plan
$251.11K 10,042 at 25.01
1.9%
Planned (10b5-1)
12 Nov 2024
Sold on a plan
$115.51K 4,713 at 24.51
0.9%
Planned (10b5-1)
20 Aug 2024
Sold at will
$103.84K 4,690 at 22.14
0.8%
Not planned
4 Feb 2019
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$217.87K 12,771 at 17.06
3.8%
18 Jan 2019
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$222.62K 12,444 at 17.89
3.7%
17 Jan 2019
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$180.44K 10,311 at 17.50
3.1%
29 Aug 2018
Sold, plan not stated
$303.21K 13,776 at 22.01
4.2%
28 Mar 2018
CHISHOLM JOHN Director
Sold, plan not stated
$104.66K 4,511 at 23.20
29.2%
27 Mar 2018
CHISHOLM JOHN Director
Sold, plan not stated
$230.33K 9,569 at 24.07
38.2%
17 Jan 2018
Hazlett James R VP -- Technical Services
Sold, plan not stated 2×
$107.03K 3,693 at 28.98
7.6%
27 Dec 2017
CHISHOLM JOHN Director
Sold, plan not stated 2×
$101.60K 3,900 at 26.05
12.7%
19 Dec 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$408.06K 16,212 at 25.17
5.5%
19 Dec 2017
Lawrence G Larry Chief Financial Officer
Sold, plan not stated
$151.38K 6,000 at 25.23
13.2%
3 Oct 2017
Sold, plan not stated
$110.72K 3,874 at 28.58
1.4%
26 Sep 2017
Hazlett James R VP -- Technical Services
Sold, plan not stated
$274.69K 9,807 at 28.01
16.3%
3 Jul 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$178.85K 7,157 at 24.99
2.5%
30 Jun 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$121.08K 4,843 at 25.00
1.7%
5 Jan 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated 2×
$251.98K 7,888 at 31.95
2.8%
4 Jan 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated
$193.79K 6,052 at 32.02
2.1%
3 Jan 2017
Taylor Stephen Charles Chief Executive Officer
Sold, plan not stated 2×
$193.08K 5,974 at 32.32
2.0%
9 Dec 2016
CURTIS CHARLES G Director
Sold, plan not stated
$266.40K 8,000 at 33.30
10.7%
17 Nov 2016
Lawrence G Larry Chief Financial Officer
Sold, plan not stated
$215.92K 8,000 at 26.99
15.6%
Showing 1–44 of 44.