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ATRANasdaq

Atara Biotherapeutics, Inc.

Alert me on ATRA
2
Insider buys, 6 months
0
Congress trades, 6 months
2
Signals, 6 months

Six months

ATRA stock chart by TradingView

After each filing

12
Aug 27 Sale Nguyen AnhCo Insider
1 week
+3.0%S&P +0.3%
1 month
−9.5%S&P −0.5%
3 months
Result in23 trading days
6 months
Result in86 trading days
May 21 Sale Grant-Huerta Yanina Insider
1 week
+12.5%S&P +1.9%
1 month
+19.5%S&P −1.0%
3 months
+3.9%S&P +3.4%
6 months
Result in19 trading days
May 21 Sale Nguyen AnhCo Insider
1 week
+12.5%S&P +1.9%
1 month
+19.5%S&P −1.0%
3 months
+3.9%S&P +3.4%
6 months
Result in19 trading days
May 12 Buy EcoR1 Capital, LLC Insider
1 week
−4.1%S&P −0.6%
1 month
+6.6%S&P −0.1%
3 months
−6.0%S&P +4.9%
6 months
Result in12 trading days
May 12 Sale Panacea Innovation Ltd Insider
1 week
−4.1%S&P −0.6%
1 month
+6.6%S&P −0.1%
3 months
−6.0%S&P +4.9%
6 months
Result in12 trading days
Show all 12
May 12 Sale Huang James Insider
1 week
−4.1%S&P −0.6%
1 month
+6.6%S&P −0.1%
3 months
−6.0%S&P +4.9%
6 months
Result in12 trading days
Mar 5 Sale Grant-Huerta Yanina Insider
1 week
+38.0%S&P −2.2%
1 month
−2.6%S&P −3.0%
3 months
+105.4%S&P +11.4%
6 months
+90.6%S&P +14.1%
Mar 5 Sale Nguyen AnhCo Insider
1 week
+38.0%S&P −2.2%
1 month
−2.6%S&P −3.0%
3 months
+105.4%S&P +11.4%
6 months
+90.6%S&P +14.1%
Jan 15 Sale Panacea Innovation Ltd Insider
1 week
+13.0%S&P −0.4%
1 month
−2.8%S&P −1.4%
3 months
+14.1%S&P +2.9%
6 months
+79.4%S&P +7.8%
Jan 15 Sale Huang James Insider
1 week
+13.0%S&P −0.4%
1 month
−2.8%S&P −1.4%
3 months
+14.1%S&P +2.9%
6 months
+79.4%S&P +7.8%
Nov 20, 2025 Sale Nguyen AnhCo Insider
1 week
+14.2%S&P +4.7%
1 month
+35.1%S&P +5.3%
3 months
−68.2%S&P +5.6%
6 months
−27.3%S&P +15.7%
Nov 20, 2025 Sale Grant-Huerta Yanina Insider
1 week
+14.2%S&P +4.7%
1 month
+35.1%S&P +5.3%
3 months
−68.2%S&P +5.6%
6 months
−27.3%S&P +15.7%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for ATRA

39 held · newest 539 held · newest 2
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See all 39 filings for ATRA

Aeon news and offers by email

New sources, new features and offers like our founding price. A few times a month at most. Stop any time.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal
No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters
NoneQ4 2025
NoneQ1 2026
$10KQ2 2026
$10KQ3 2026
Unchanged from Q2 2026. Reported to the Senate each quarter by the firms it hires.Original report ↗

Read from LDA.gov between Sep 23, 2026 and Oct 20, 2026. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.