Insider trading

Period: 120 months Stock: DDS Role: Other officers × + 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.

16 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.

16 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.

16 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.

16 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.
16 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
16 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.

16 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
29 Sep 2025
Johnson Chris B. SENIOR VICE PRESIDENT
Sold at will
$246.80K 400 at 617.00
4.1%
Not planned
14 Jan 2025
BOLIN TOM W VICE PRESIDENT
Sold at will
$130.04K 300 at 433.45
20.4%
Not planned
7 Jul 2023
BOLIN TOM W VICE PRESIDENT
Sold at will 2×
$376.82K 1,136 at 331.71
52.5%
Sold half or more
12 Jan 2023
Johnson Chris B. SENIOR VICE PRESIDENT
Sold, plan not stated
$233.46K 650 at 359.17
7.0%
16 Nov 2022
BOLTE TONY J Vice President
Sold, plan not stated
$845.02K 2,300 at 367.40
50.4%
Sold half or more
3 Jun 2022
LITCHFORD MIKE Vice President
Sold, plan not stated
$159.85K 500 at 319.69
15.5%
2 Sep 2021
Worley Dean L. VP/General Counsel & Secretary
Sold, plan not stated
$19.81K 100 at 198.13
1.8%
17 May 2021
BOLIN TOM W Vice President
Sold, plan not stated
$57.68K 400 at 144.21
20.1%
2 Mar 2021
Johnson Chris B. Senior Vice President
Sold, plan not stated
$44.59K 500 at 89.17
5.7%
25 Feb 2021
Dillard William T. III Senior Vice President · indirect
Sold, plan not stated
$349.71K 4,400 at 79.48
22.6%
8 Jun 2020
MATHENY DRUE Executive Vice President · indirect
Bought
$11.10K 300 at 37.00
85.7%
First buy on file
17 Mar 2020
MATHENY DRUE Executive Vice President · indirect
Bought
$7.49K 200 at 37.43
133%
First buy on file
17 Jul 2019
BOLTE TONY J Vice President
Sold, plan not stated
$154.70K 2,400 at 64.46
56.6%
Sold half or more
1 Apr 2019
LITCHFORD MIKE Vice President
Sold, plan not stated
$78.24K 1,060 at 73.81
35.4%
13 Jun 2018
BOLIN TOM W Vice President
Sold, plan not stated
$45.65K 495 at 92.22
46.5%
7 Jun 2018
McNiff Michael S. Vice President
Sold, plan not stated
$933.10K 10,000 at 93.31
32.9%
Showing 1–16 of 16.