Brian N Cherry, Director at Atara Biotherapeutics, bought ATRA on Sep 4, 2026

Data as of Oct 16

▲ BUY$1M104,166 shares at $9.60Brian N Cherry DirectorATRA Atara Biotherapeutics, Inc.

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Traded: Sep 4, 2026
Disclosed: Sep 4, 2026
Filed: The same day

Form 4s are due within two business days.

Official filing (SEC Form 4) ↗

The price around the disclosure

ATRASimilar stocks (XLV — its sector index fund), rebased to ATRA's price on the disclosure day

ATRA since disclosure

−5.9%

Similar stocks (XLV) since disclosure

+3.1%

XLV — its sector index fund

Change in closing price from Sep 4, 2026 (the first trading day on or after disclosure) to Oct 16, 2026. Dividends excluded. Not a return anyone earned.

Our take

None of our tested rules fired on this trade.

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