ATRA — Insider Trading Activity
One insider at ATRA put personal money into the stock on the open market this window, led by a Director, against 1 insider selling.
What this means for ATRA
ATRA is not showing a cluster buy or a step-change versus its own baseline, so what the window amounts to is a single insider acting alone. Who is buying. The most credible buyer in this window is a Director ($500K–$1M), growing their stake by 167%. Overall credibility score: 39/100 (Low).
By the numbers. One insider filed 1 open-market purchase at ATRA over the window, 104,166 shares in all at an average of $9.60 a share, most recently on September 4, 2026. On the other side, one insider filed 1 sale covering 5,062 shares at an average of $8.08, the latest on August 17, 2026. That puts the average sale 16% below the average purchase — worth checking against where the stock trades today.
How we read these filings — which transaction codes count, how the cluster and credibility thresholds are set, and what the signals have and haven’t predicted — is written up in the insider trading methodology.
ATRA insider filings, one by one
All 2 Form 4 filings from the last 90 days, by insider, with share count, dollar amount and date.
Other tickers with the same signal
Companies of a comparable size whose Form 4 filings tripped the same insider buying flag as ATRA in this window.
- IR insider trading — 1 buyer, credibility 39/100
- MSCI insider trading — 1 buyer, credibility 37/100
- ALK insider trading — 1 buyer, 1 seller, credibility 54/100
- HONA insider trading — 1 buyer, credibility 39/100
- ITT insider trading — 1 buyer, 1 seller, credibility 51/100