Insider trading

Period: 120 months Stock: ATEC Plan: Discretionary × + 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.

56 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.

56 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.

56 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.

56 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.
56 decisions over 120 months Remove this filter
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
56 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.

56 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
10 Sep 2026
Bought
$1.01M 115,000 at 8.81
2.0%
First buy in 3+ yrs
11 May 2026
Valentine Keith Director
Bought
$245.00K 35,000 at 7.00
17.7%
8 May 2026
Valentine Keith Director
Bought
$330.61K 43,847 at 7.54
28.6%
+29% of stake
7 May 2026
Valentine Keith Director
Bought
$420.59K 56,153 at 7.49
57.7%
Largest buy in 3 yrs
13 Mar 2026
Lish Scott CHIEF OPERATING OFFICER
Sold at will
$3.20M 260,535 at 12.30
24.2%
Not planned
16 Dec 2025
Pelizzon David R Director · indirect
Sold at will
$4.92M 250,000 at 19.66
2.3%
Not planned
11 Dec 2025
Demski David M Director
Sold at will
$636.00K 30,000 at 21.20
7.0%
Not planned
10 Dec 2025
Hunsaker Craig E EVP, PEOPLE & CULTURE
Sold at will
$679.05K 32,584 at 20.84
2.5%
Not planned
9 Dec 2025
Pritzker Jennifer N. 10% owner · indirect
Sold at will
$606.38K 28,834 at 21.03
0.3%
Not planned
9 Dec 2025
Squadron Capital Holdings LLC 10% owner · indirect
Sold at will
$606.38K 28,834 at 21.03
0.3%
Not planned
9 Dec 2025
Sold at will
$606.38K 28,834 at 21.03
0.3%
Not planned
9 Dec 2025
Pelizzon David R Director · indirect
Sold at will
$606.38K 28,834 at 21.03
0.3%
Not planned
8 Dec 2025
Pritzker Jennifer N. 10% owner · indirect
Sold at will
$4.69M 221,166 at 21.20
2.0%
Not planned
8 Dec 2025
Squadron Capital Holdings LLC 10% owner · indirect
Sold at will
$4.69M 221,166 at 21.20
2.0%
Not planned
8 Dec 2025
Sold at will
$4.69M 221,166 at 21.20
2.0%
Not planned
8 Dec 2025
Pelizzon David R Director · indirect
Sold at will
$4.69M 221,166 at 21.20
2.0%
Not planned
8 Dec 2025
Sponsel David EVP, SALES
Sold at will
$21.19K 988 at 21.45
0.2%
Not planned
5 Dec 2025
Lish Scott CHIEF OPERATING OFFICER
Sold at will
$233.49K 10,875 at 21.47
1.6%
Not planned
24 Nov 2025
Sold at will
$5.16M 250,000 at 20.62
2.2%
Not planned
24 Nov 2025
Pelizzon David R Director · indirect
Sold at will
$5.16M 250,000 at 20.62
2.2%
Not planned
24 Nov 2025
Squadron Capital Holdings LLC 10% owner · indirect
Sold at will
$5.16M 250,000 at 20.62
2.2%
Not planned
24 Nov 2025
Pritzker Jennifer N. 10% owner · indirect
Sold at will
$5.16M 250,000 at 20.62
2.2%
Not planned
20 Nov 2025
Marshall Tyson Eliot GENERAL COUNSEL & CORP. SEC.
Sold at will
$1.37M 70,000 at 19.51
16.0%
Not planned
20 Nov 2025
Lish Scott CHIEF OPERATING OFFICER
Sold at will
$495.00K 25,000 at 19.80
3.6%
Not planned
12 Nov 2025
Squadron Capital Holdings LLC 10% owner · indirect
Sold at will
$5.20M 250,000 at 20.80
2.2%
Not planned
12 Nov 2025
Sold at will
$5.20M 250,000 at 20.80
2.2%
Not planned
12 Nov 2025
Pelizzon David R Director · indirect
Sold at will
$5.20M 250,000 at 20.80
2.2%
Not planned
12 Nov 2025
Pritzker Jennifer N. 10% owner · indirect
Sold at will
$5.20M 250,000 at 20.80
2.2%
Not planned
3 Nov 2025
Rydin Jeffrey P Director
Sold at will
$3.86M 200,000 at 19.32
34.2%
Not planned
9 Sep 2025
Sold at will
$998.13K 62,500 at 15.97
9.2%
Not planned
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
7 Mar 2025
Sold at will
$135.03K 12,691 at 10.64
0.2%
Not planned
26 Feb 2025
Sold at will
$352.76K 32,393 at 10.89
0.5%
Not planned
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
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
9 Nov 2023
Demski David M Director
Bought
$315.00K 30,000 at 10.50
19.8%
First buy on file
11 Sep 2023
TULLIS JAMES L L Director · indirect
Sold at will
$1.03M 70,000 at 14.74
11.0%
Not planned
11 Sep 2023
TULLIS JAMES L L Director
Sold at will
$515.90K 35,000 at 14.74
16.9%
Not planned
11 Sep 2023
Mowry David H Director
Sold at will
$137.37K 9,500 at 14.46
9.3%
Not planned
10 Aug 2023
Bought
$35.98K 2,400 at 14.99
4.3%
10 Aug 2023
Pritzker Jennifer N. 10% owner · indirect
Bought 2×
$29.90K 2,000 at 14.95
33.3%
+33% of stake
8 Aug 2023
Pritzker Jennifer N. 10% owner · indirect
Bought
$21.01K 1,350 at 15.56
12.8%
Showing 1–50 of 56. Page 1 of 2 Older →