Insider trading

Period: 120 months Stock: ATEC + Add filter Clear all
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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.

289 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.

289 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.

289 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.

289 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.
289 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
289 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.

289 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
2 Sep 2025
Sold on a plan
$4.72M 300,000 at 15.73
5.1%
Planned (10b5-1)
21 Aug 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$101.23K 6,323 at 16.01
1.0%
Planned (10b5-1)
13 Aug 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$148.83K 9,302 at 16.00
1.4%
Planned (10b5-1)
6 Aug 2025
Hunsaker Craig E EVP, PEOPLE & CULTURE
Sold on a plan
$166.73K 10,876 at 15.33
0.8%
Planned (10b5-1)
5 Aug 2025
Hunsaker Craig E EVP, PEOPLE & CULTURE
Sold on a plan
$750.00K 50,000 at 15.00
3.4%
Planned (10b5-1)
5 Aug 2025
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold on a plan 2×
$269.66K 18,092 at 14.91
4.0%
Planned (10b5-1)
5 Aug 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$249.99K 16,666 at 15.00
2.4%
Planned (10b5-1)
4 Aug 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$250.00K 17,857 at 14.00
2.5%
Planned (10b5-1)
1 Aug 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$452.09K 36,081 at 12.53
4.8%
Planned (10b5-1)
1 Aug 2025
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold on a plan
$154.54K 12,878 at 12.00
2.7%
Planned (10b5-1)
10 Jul 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$47.78K 3,982 at 12.00
0.5%
Planned (10b5-1)
10 Jul 2025
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold on a plan
$18.00K 1,500 at 12.00
0.3%
Planned (10b5-1)
13 Jun 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$251.59K 22,727 at 11.07
2.9%
Planned (10b5-1)
11 Jun 2025
MCGINNIS KAREN K Director
Sold on a plan
$47.99K 3,963 at 12.11
5.5%
Planned (10b5-1)
5 Jun 2025
Hunsaker Craig E EVP, PEOPLE & CULTURE
Sold on a plan
$171.53K 13,878 at 12.36
0.9%
Planned (10b5-1)
4 Jun 2025
Hunsaker Craig E EVP, PEOPLE & CULTURE
Sold on a plan
$2.30M 186,122 at 12.34
11.3%
Planned (10b5-1)
19 May 2025
Lish Scott CHIEF OPERATING OFFICER
Sold at will
$719.88K 55,375 at 13.00
6.7%
Not planned
5 May 2025
Lish Scott CHIEF OPERATING OFFICER
Sold at will
$145.44K 12,000 at 12.12
1.4%
Not planned
22 Apr 2025
Koning John Todd CHIEF FINANCIAL OFFICER
Sold on a plan
$401.63K 37,500 at 10.71
7.4%
Planned (10b5-1)
10 Mar 2025
Koning John Todd CHIEF FINANCIAL OFFICER
Sold on a plan
$1.60M 165,121 at 9.72
25.5%
Planned (10b5-1)
10 Mar 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$272.10K 27,994 at 9.72
3.3%
Planned (10b5-1)
7 Mar 2025
Sold at will
$135.03K 12,691 at 10.64
0.2%
Not planned
6 Mar 2025
Sponsel David EVP, SALES
Sold on a plan
$365.32K 33,732 at 10.83
4.8%
Planned (10b5-1)
3 Mar 2025
MCGINNIS KAREN K Director
Sold on a plan
$469.80K 38,320 at 12.26
40.0%
Planned (10b5-1)
27 Feb 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$278.89K 23,183 at 12.03
2.7%
Planned (10b5-1)
26 Feb 2025
Sold at will
$352.76K 32,393 at 10.89
0.5%
Not planned
25 Feb 2025
Sponsel David EVP, SALES
Sold on a plan
$202.15K 19,419 at 10.41
2.7%
Planned (10b5-1)
24 Feb 2025
Sponsel David EVP, SALES
Sold on a plan
$138.91K 12,946 at 10.73
1.8%
Planned (10b5-1)
6 Feb 2025
Lish Scott CHIEF OPERATING OFFICER
Sold on a plan
$315.43K 27,453 at 11.49
3.1%
Planned (10b5-1)
5 Feb 2025
Sold on a plan
$519.34K 43,459 at 11.95
0.7%
Planned (10b5-1)
3 Feb 2025
Sponsel David EVP, SALES
Sold on a plan
$414.04K 36,256 at 11.42
4.7%
Planned (10b5-1)
30 Jan 2025
Sold on a plan
$521.06K 43,313 at 12.03
0.7%
Planned (10b5-1)
29 Jan 2025
Sold on a plan
$601.50K 50,000 at 12.03
0.8%
Planned (10b5-1)
21 Jan 2025
Sold on a plan
$80.24K 6,687 at 12.00
0.1%
Planned (10b5-1)
13 Jan 2025
Sponsel David EVP, SALES
Sold on a plan
$624.21K 58,283 at 10.71
10.4%
Planned (10b5-1)
10 Jan 2025
Sponsel David EVP, SALES
Sold on a plan
$2.38K 238 at 10.00
0.0%
Planned (10b5-1)
11 Dec 2024
Sponsel David EVP, SALES
Sold on a plan
$600.95K 62,018 at 9.69
10.0%
Planned (10b5-1)
21 Nov 2024
Sold on a plan
$504.50K 50,000 at 10.09
0.9%
Planned (10b5-1)
20 Nov 2024
Sold on a plan
$501.50K 50,000 at 10.03
0.9%
Planned (10b5-1)
23 Aug 2024
Bakst Evan Director · indirect
Bought
$201.60K 35,000 at 5.76
233%
+233% of stake
23 Aug 2024
Pelizzon David R Director
Bought
$100.00K 16,978 at 5.89
5.4%
Largest buy in 3 yrs
22 Aug 2024
Pelizzon David R Director
Bought
$50.00K 8,818 at 5.67
2.9%
21 Aug 2024
Demski David M Director
Bought
$283.50K 50,000 at 5.67
21.0%
+21% of stake
2 Aug 2024
Demski David M Director
Bought
$262.40K 40,000 at 6.56
20.2%
+20% of stake
2 Aug 2024
Valentine Keith Director
Bought
$255.45K 39,000 at 6.55
90.4%
First buy on file
12 Jun 2024
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold at will
$546.52K 50,232 at 10.88
17.0%
Not planned
24 Apr 2024
Koning John Todd CHIEF FINANCIAL OFFICER
Sold on a plan
$480.75K 37,500 at 12.82
8.7%
Planned (10b5-1)
14 Mar 2024
Bakst Evan Director · indirect
Bought
$202.95K 15,000 at 13.53
opened
Largest buy in 3 yrs
7 Mar 2024
Bought
$256.60K 20,000 at 12.83
3.6%
First buy on file
6 Mar 2024
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold on a plan
$121.40K 9,225 at 13.16
3.0%
Planned (10b5-1)
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