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CLOSED · 15:00 ET
Market Clerk
Sun Sep 6 · markets closed2 signals today321 insider buys this week · $404MCIRO short report next: Sep 15The week ahead

ATRA

Atara Biotherapeutics, Inc.
NASDAQ · HEALTH CARE · BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
9.76
+0.23 +2.41%
USD · Sep 6, 01:16 a.m. ET

One year, everything drawn on

251 SESSIONS · DAILY CLOSES
19148.453.07Sep 4 · Director buy $1MAug 17 · President and CEO sell $41KAug 12 · 10-Q filed (Q2 2026)Aug 12 · 10-Q filed (Q1 2026)Mar 16 · 10-K filed (FY 2025)Mar 16 · 10-K filed (Q4 2025)Nov 12 · 10-Q filed (Q3 2025)Aug 12 · 10-Q filed (Q2 2025)Aug 12 · 10-Q filed (Q1 2025)Mar 16 · 10-K filed (FY 2024)Mar 16 · 10-K filed (Q4 2024)Nov 12 · 10-Q filed (Q3 2024)Nov 12 · 10-Q filed (Q2 2024)Nov 12 · 10-Q filed (Q1 2024)SEP 2025OCTJAN 2026APRJUL
Insider buyInsider sellCongress buy, above the lineCongress sell, below10-K / 10-Q filedHOVER A MARKER FOR THE FILING
THE WORK ORDER · 2026-09-06
Insiders (90d): $959K net buying · 1 distinct buyer
Shorts (latest report): 477K short · −60K last period
Every line of the math
80PASS

Congress is trading it

No STOCK Act disclosure names ATRA.

Insider activity

ALL 2
DateInsiderTypeValue
Sep 4DirectorBuy$1M
Aug 17President and CEOSell$41K
Watch ATRA. Know when insiders buy.
One email the day a filing lands. Free.