ATER — Insider Trading Activity
CEO sold 31% of their stake — first sale in 12+ months at ATER, outside any pre-arranged Rule 10b5-1 plan.
What this means for ATER
ATER is not showing a cluster buy or a step-change versus its own baseline, so what the window amounts to is selling only. Unusual selling. CEO sold 31% of their stake — first sale in 12+ months. None of it was executed under a pre-arranged Rule 10b5-1 plan, so the timing was the insider’s own choice — $10M–$50M of discretionary selling in total.
By the numbers. No insider at ATER filed an open-market purchase in the last 90 days. On the other side, one insider filed 2 sales covering 2,456,100 shares at an average of $4.89, the latest on September 25, 2026.
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.
ATER 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 flagged selling flag as ATER in this window.
- CIEN insider trading — no buyers, 10 sellers
- TEVA insider trading — no buyers, 8 sellers
- PG insider trading — no buyers, 12 sellers
- GCT insider trading — no buyers, 4 sellers
- AMBQ insider trading — no buyers, 5 sellers