Insider trading

Period: 120 months Stock: ATEC Type of trade: Bought × + Add filter Clear all
Views & alerts

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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.

76 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.

76 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.

76 decisions over 120 months Remove this filter
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

76 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.
76 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
76 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.

76 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
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
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
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%
10 May 2023
Bought
$37.37K 2,400 at 15.57
4.5%
10 May 2023
Pritzker Jennifer N. 10% owner · indirect
Bought 2×
$31.42K 2,000 at 15.71
40.0%
+40% of stake
9 May 2023
Pritzker Jennifer N. 10% owner · indirect
Bought
$18.31K 1,200 at 15.26
12.8%
13 Mar 2023
Pelizzon David R Director
Bought
$47.24K 3,100 at 15.24
1.1%
7 Mar 2023
Bought
$47.79K 3,000 at 15.93
6.0%
6 Mar 2023
Pritzker Jennifer N. 10% owner · indirect
Bought
$24.60K 1,550 at 15.87
19.8%
10 Aug 2022
Bought
$16.20K 2,000 at 8.10
4.1%
10 Aug 2022
Pritzker Jennifer N. 10% owner · indirect
Bought
$16.08K 2,000 at 8.04
50.0%
+50% of stake
9 Aug 2022
Pritzker Jennifer N. 10% owner · indirect
Bought
$16.49K 2,100 at 7.85
36.6%
+37% of stake
9 Aug 2022
Bought
$15.94K 2,000 at 7.97
4.3%
15 Jun 2022
Segal Paul 10% owner
Bought
$343.50K 50,000 at 6.87
17.3%
15 Jun 2022
TULLIS JAMES L L Director
Bought
$50.70K 7,500 at 6.76
4.2%
First buy on file
14 Jun 2022
Segal Paul 10% owner
Bought
$347.50K 50,000 at 6.95
20.9%
+21% of stake
10 Jun 2022
Segal Paul 10% owner
Bought
$1.42K 200 at 7.10
0.1%
9 Jun 2022
Segal Paul 10% owner
Bought
$510.71K 71,129 at 7.18
42.5%
+42% of stake
9 Jun 2022
Bought
$115.20K 16,000 at 7.20
3.0%
First buy on file
16 May 2022
Pritzker Jennifer N. 10% owner · indirect
Bought
$16.64K 2,000 at 8.32
53.6%
+54% of stake
13 May 2022
Bought
$31.84K 4,000 at 7.96
9.5%
11 Mar 2022
Pritzker Jennifer N. 10% owner · indirect
Bought
$11.70K 1,100 at 10.64
41.8%
+42% of stake
8 Mar 2022
Pritzker Jennifer N. 10% owner · indirect
Bought 2×
$22.91K 2,000 at 11.46
100%
+100% of stake
8 Mar 2022
Bought 2×
$22.84K 2,000 at 11.42
5.0%
16 Dec 2021
Koning John Todd Chief Financial Officer
Bought
$55.85K 5,000 at 11.17
2.6%
First buy on file
15 Dec 2021
Hochberg Jason Director
Bought
$54.20K 5,000 at 10.84
6.3%
Largest buy in 3 yrs
10 Dec 2021
Pritzker Jennifer N. 10% owner · indirect
Bought 3×
$34.99K 3,000 at 11.66
opened
10 Dec 2021
Bought
$11.79K 1,000 at 11.79
2.6%
9 Dec 2021
Bought
$12.18K 1,000 at 12.18
2.6%
26 Nov 2021
Bakst Evan Director
Bought
$105.70K 10,000 at 10.57
1.3%
First buy on file
24 Nov 2021
Segal Paul 10% owner
Bought
$1.12M 100,000 at 11.17
148%
Largest buy in 3 yrs
23 Nov 2021
Segal Paul 10% owner
Bought
$681.03K 67,496 at 10.09
opened
First buy on file
23 Nov 2021
Hochberg Jason Director
Bought
$54.15K 5,000 at 10.83
6.7%
First buy on file
12 Nov 2021
Hunsaker Craig E EVP, People/Culture & GC
Bought
$174.90K 15,000 at 11.66
1.4%
First buy on file
11 Nov 2021
Bought
$585.50K 50,000 at 11.71
1.0%
First buy on file
11 Nov 2021
Pelizzon David R Director
Bought
$49.82K 4,366 at 11.41
1.5%
8 Nov 2021
Pelizzon David R Director
Bought
$70.53K 5,425 at 13.00
1.9%
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