Insider trading

Period: 120 months Stock: ATRA 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.

12 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.

12 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.

12 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.

12 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.
12 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
12 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.

12 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
4 Sep 2026
Cherry Brian N Director
Bought
$999.99K 104,166 at 9.60
167%
First buy on file
7 May 2026
EcoR1 Capital, LLC 10% owner · indirect
Bought
$4.74M 507,407 at 9.35
48.6%
First buy on file
15 Aug 2025
Panacea Innovation Ltd 10% owner · indirect
Bought
$670.42K 55,000 at 12.19
4.1%
Largest buy in 3 yrs
17 Jul 2025
Panacea Innovation Ltd 10% owner · indirect
Bought
$186.37K 19,335 at 9.64
1.5%
First buy on file
14 Nov 2023
Bought
$28.19K 90,980 at 0.31
24.7%
+25% of stake
13 Nov 2023
Bought
$40.03K 179,020 at 0.22
94.5%
First buy on file
10 Nov 2023
DOBMEIER ERIC Director
Bought
$101.34K 446,825 at 0.23
384%
First buy on file
10 Nov 2023
HEIDEN WILLIAM K Director
Bought
$25.33K 100,000 at 0.25
91.7%
First buy on file
14 Jun 2021
Yarema Kristin Chief Commercial Officer
Bought 2×
$471.07K 32,333 at 14.57
34.6%
Largest buy in 3 yrs
11 Jun 2021
Yarema Kristin Chief Commercial Officer
Bought
$29.30K 2,021 at 14.50
2.2%
First buy on file
27 Jun 2019
DOBMEIER ERIC Director
Bought
$39.00K 2,000 at 19.50
14.3%
First buy on file
27 Jul 2018
Koppikar Utpal Chief Financial Officer
Bought
$73.60K 2,000 at 36.80
4.4%
First buy on file
Showing 1–12 of 12.