$ATRA: Atara Biotherapeutics, Inc. - Common Stock
2025-10-28 ATRA 2025-10-28 18:01:20 16.25 13.64 -2.37% ATRA 2025-10-28 20:01:18 0.00 0.00 -2.37% 2025-10-29 ATRA 2025-10-29 04:01:23 20.00 0.00 -2.37% ATRA 2025-10-29 05:01:10 16.02 11.48 -2.37% ATRA 2025-10-29 06:01:27 16.02 12.28 -2.37% ATRA 2025-10-29 07:01:10 16.02 15.21 -2.37% ATRA 2025-10-29 09:01:11 16.02 15.21 0.00% ATRA 2025-10-29 10:01:19 15.31 15.05 -0.19% ATRA 2025-10-29 11:01:09 14.81 14.53 -3.72% ATRA 2025-10-29 12:01:26 14.82 14.71 -3.08% ATRA 2025-10-29 13:01:10 14.78 14.52 -4.04% ATRA 2025-10-29 14:01:20 14.66 14.39 -5.84% ATRA 2025-10-29 15:01:13 14.31 13.96 -7.06% ATRA 2025-10-29 16:01:26 15.11 13.73 -7.38% ATRA 2025-10-29 17:01:16 15.11 12.63 -7.56% ATRA 2025-10-29 20:01:20 0.00 0.00 -7.56% 2025-10-30 ATRA 2025-10-30 05:01:10 15.80 10.11 -7.56% ATRA 2025-10-30 07:01:14 15.80 12.90 -7.56% ATRA 2025-10-30 09:01:09 15.80 12.63 -7.56% ATRA 2025-10-30 10:01:19 13.96 13.53 -3.02% ATRA 2025-10-30 11:01:11 13.86 13.53 -2.17% ATRA 2025-10-30 12:01:21 13.96 13.75 -1.31% ATRA 2025-10-30 13:01:15 14.33 14.03 0.46% ATRA 2025-10-30 14:01:22 14.32 14.00 0.13% ATRA 2025-10-30 15:01:15 14.25 14.09 0.26% ATRA 2025-10-30 16:01:26 15.03 13.53 0.00% ATRA 2025-10-30 17:01:12 15.03 13.77 0.00% ATRA 2025-10-30 18:01:26 15.03 13.53 0.00% ATRA 2025-10-30 20:01:30 0.00 0.00 0.00% 2025-10-31 ATRA 2025-10-31 05:01:18 15.70 12.39 0.00% ATRA 2025-10-31 09:01:18 15.70 13.30 0.00% ATRA 2025-10-31 10:01:24 14.48 13.50 0.64% ATRA 2025-10-31 11:01:12 14.67 14.14 2.49% ATRA 2025-10-31 12:01:23 14.57 13.93 2.63% ATRA 2025-10-31 13:01:15 14.50 13.93 2.20% ATRA 2025-10-31 14:01:40 14.35 14.02 1.85% ATRA 2025-10-31 15:01:14 14.82 14.59 4.41% ATRA 2025-10-31 16:03:07 0.00 14.56 5.76% ATRA 2025-10-31 17:01:12 16.31 14.56 5.77% ATRA 2025-10-31 18:01:29 16.31 10.11 5.77% ATRA 2025-10-31 20:01:24 0.00 0.00 5.77% 2025-11-03 ATRA 2025-11-03 06:01:26 17.00 13.75 5.77% ATRA 2025-11-03 08:01:30 16.98 13.75 5.77% ATRA 2025-11-03 09:01:15 16.00 13.75 5.77% ATRA 2025-11-03 11:01:18 14.70 14.05 -2.35% ATRA 2025-11-03 12:01:29 14.14 13.88 -7.69% ATRA 2025-11-03 13:01:22 14.06 13.68 -7.97% ATRA 2025-11-03 14:01:43 14.15 14.00 -4.91% ATRA 2025-11-03 15:01:18 14.28 14.00 -4.98% ATRA 2025-11-03 16:01:32 14.16 14.00 -4.91% ATRA 2025-11-03 17:02:55 14.72 13.58 -7.12% ATRA 2025-11-03 18:01:36 14.72 13.58 -6.73% ATRA 2025-11-03 19:01:30 15.14 13.58 -6.73% ATRA 2025-11-03 21:02:30 0.00 0.00 -6.73% ATRA 2025-11-03 22:02:28 15.14 13.58 -6.73% 2025-11-04 ATRA 2025-11-04 06:01:23 16.00 13.30 -6.73% ATRA 2025-11-04 10:01:25 16.00 10.11 -6.73% ATRA 2025-11-04 11:01:10 13.84 13.37 -1.62% ATRA 2025-11-04 12:01:23 13.69 13.28 -3.16% ATRA 2025-11-04 13:01:13 13.52 13.30 -2.76% ATRA 2025-11-04 14:01:28 13.41 13.10 -3.77% ATRA 2025-11-04 15:05:53 13.22 13.04 -5.25% ATRA 2025-11-04 16:02:31 12.60 12.25 -9.49% ATRA 2025-11-04 17:01:24 20.00 0.00 -10.44% ATRA 2025-11-04 18:01:33 16.70 12.05 -9.46% ATRA 2025-11-04 19:01:33 15.19 11.24 -11.05% ATRA 2025-11-04 20:02:45 12.40 11.24 -11.05% 2025-11-05 ATRA 2025-11-05 06:01:31 13.46 10.11 -11.05% ATRA 2025-11-05 07:01:20 13.46 10.25 -11.05% ATRA 2025-11-05 08:01:45 13.46 11.24 -11.05% ATRA 2025-11-05 11:01:16 12.40 12.10 -1.08% ATRA 2025-11-05 12:01:21 11.19 10.81 -9.24% ATRA 2025-11-05 13:01:12 11.02 10.84 -10.40% ATRA 2025-11-05 14:01:23 10.96 10.80 -10.32% ATRA 2025-11-05 15:01:23 11.20 10.86 -9.75% ATRA 2025-11-05 16:01:38 10.68 10.53 -12.64% ATRA 2025-11-05 17:01:16 11.95 10.51 -11.05% ATRA 2025-11-05 18:06:16 11.95 10.54 -10.74% ATRA 2025-11-05 19:01:20 11.85 10.51 -13.91% ATRA 2025-11-05 21:01:59 0.00 0.00 -13.91% 2025-11-06 ATRA 2025-11-06 06:01:26 11.85 8.76 -13.91% ATRA 2025-11-06 07:01:27 11.85 9.34 -13.91% ATRA 2025-11-06 10:01:24 12.90 9.72 -13.91% ATRA 2025-11-06 11:01:14 11.04 10.62 0.73% ATRA 2025-11-06 12:01:21 11.66 11.30 4.80% ATRA 2025-11-06 13:01:17 11.70 11.35 5.45% ATRA 2025-11-06 14:01:32 11.57 11.43 5.45% ATRA 2025-11-06 15:01:32 11.67 11.45 7.40% ATRA 2025-11-06 16:01:25 11.63 11.52 6.59% ATRA 2025-11-06 17:01:19 12.40 10.10 8.79% ATRA 2025-11-06 18:01:28 12.40 11.59 10.05% ATRA 2025-11-06 19:01:20 12.40 10.10 10.05% 2025-11-07 ATRA 2025-11-07 06:01:34 13.46 9.25 10.05% ATRA 2025-11-07 08:01:24 13.16 9.25 10.05% ATRA 2025-11-07 10:01:34 11.80 9.51 10.05% ATRA 2025-11-07 11:01:15 11.39 10.77 -7.63% ATRA 2025-11-07 12:01:22 11.05 10.50 -9.67% ATRA 2025-11-07 13:01:16 10.86 10.69 -9.86% ATRA 2025-11-07 14:01:46 11.30 11.21 -6.23% ATRA 2025-11-07 15:01:26 11.93 11.53 -2.23% ATRA 2025-11-07 16:01:31 12.08 11.64 0.00% ATRA 2025-11-07 17:01:27 0.00 10.70 0.00% ATRA 2025-11-07 18:01:32 13.16 11.58 0.00% ATRA 2025-11-07 19:01:23 13.16 10.70 0.00% ATRA 2025-11-07 21:02:08 0.00 0.00 0.00% 2025-11-10 ATRA 2025-11-10 06:01:42 13.46 10.55 0.00% ATRA 2025-11-10 11:01:25 12.69 12.24 7.78% ATRA 2025-11-10 12:01:29 12.07 11.91 1.52% ATRA 2025-11-10 13:01:22 12.50 12.30 4.57% ATRA 2025-11-10 14:01:32 12.37 11.79 4.23% ATRA 2025-11-10 15:01:24 12.32 12.03 2.88% ATRA 2025-11-10 16:01:51 12.40 12.22 3.55% ATRA 2025-11-10 17:01:35 19.93 11.50 4.23% ATRA 2025-11-10 18:01:37 12.30 12.06 4.23% ATRA 2025-11-10 19:01:27 13.89 11.37 4.23% ATRA 2025-11-10 21:01:52 0.00 0.00 4.23% 2025-11-11 ATRA 2025-11-11 06:01:40 12.30 10.79 4.23% ATRA 2025-11-11 11:01:19 12.40 12.26 0.76% ATRA 2025-11-11 12:01:31 12.57 12.28 1.69% ATRA 2025-11-11 13:01:28 12.48 12.25 0.76% ATRA 2025-11-11 14:01:32 12.63 12.39 1.52% ATRA 2025-11-11 15:01:26 12.63 12.26 0.76% ATRA 2025-11-11 16:01:30 12.74 12.52 2.79% ATRA 2025-11-11 17:01:20 0.00 0.00 2.20% ATRA 2025-11-11 18:01:52 16.70 11.21 2.11% ATRA 2025-11-11 19:01:38 16.69 12.56 5.77% ATRA 2025-11-11 21:01:53 0.00 0.00 2.11% 2025-11-12 ATRA 2025-11-12 06:01:32 18.45 10.79 2.11% ATRA 2025-11-12 08:01:28 14.92 10.79 2.11% ATRA 2025-11-12 09:01:18 14.92 11.49 2.11% ATRA 2025-11-12 10:01:30 13.20 10.92 -3.33% ATRA 2025-11-12 10:05:09 8-K Sec report https://www.sec.gov/Archives/edgar/data/1604464/000119312525276209/0001193125-25-276209-index.htm 8-K - Atara Biotherapeutics, Inc. (0001604464) (Filer) ATRA 2025-11-12 10:10:51 10-Q Sec report https://www.sec.gov/Archives/edgar/data/1604464/000119312525276219/0001193125-25-276219-index.htm 10-Q - Atara Biotherapeutics, Inc. (0001604464) (Filer) ATRA 2025-11-12 11:01:14 12.08 11.70 -6.83% ATRA 2025-11-12 12:01:23 11.50 11.17 -9.92% ATRA 2025-11-12 13:01:16 11.91 11.50 -6.42% ATRA 2025-11-12 14:01:28 12.08 11.94 -4.72% ATRA 2025-11-12 15:01:20 12.00 11.58 -5.20% ATRA 2025-11-12 16:01:29 12.33 11.72 -2.03% ATRA 2025-11-12 17:01:23 13.17 11.77 -0.65% ATRA 2025-11-12 18:01:28 13.17 12.23 -0.64% ATRA 2025-11-12 20:01:27 12.82 12.23 -0.64% ATRA 2025-11-12 21:01:34 0.00 0.00 -0.64% ATRA 2025-11-12 22:01:59 12.82 12.23 -0.64% 2025-11-13 ATRA 2025-11-13 06:01:36 13.91 8.47 -0.64% ATRA 2025-11-13 08:01:26 13.91 10.26 -0.64% ATRA 2025-11-13 09:01:18 13.91 11.04 -0.64% ATRA 2025-11-13 11:01:19 13.00 12.51 3.74% ATRA 2025-11-13 12:01:31 13.27 13.00 4.62% ATRA 2025-11-13 13:01:22 13.44 12.94 6.37% ATRA 2025-11-13 14:01:39 13.30 12.88 6.13% ATRA 2025-11-13 15:01:35 13.21 12.72 3.90% ATRA 2025-11-13 16:01:39 13.24 13.02 3.98% ATRA 2025-11-13 17:01:22 0.00 0.00 7.32% ATRA 2025-11-13 18:01:30 14.92 13.13 7.38% ATRA 2025-11-13 19:01:20 14.86 11.42 5.37% ATRA 2025-11-13 21:01:48 0.00 0.00 5.37% 2025-11-14 ATRA 2025-11-14 06:01:39 15.51 11.42 5.37% ATRA 2025-11-14 08:01:33 14.92 11.42 5.37% ATRA 2025-11-14 09:01:24 14.79 11.42 5.37% ATRA 2025-11-14 10:01:36 14.73 11.58 5.37% ATRA 2025-11-14 11:01:14 13.70 13.31 2.33% ATRA 2025-11-14 12:01:19 13.70 13.33 0.96% ATRA 2025-11-14 13:01:20 13.61 13.40 0.96% ATRA 2025-11-14 14:01:34 13.71 13.59 2.57% ATRA 2025-11-14 15:01:31 14.00 13.59 4.89% ATRA 2025-11-14 16:01:46 14.45 13.98 5.05% ATRA 2025-11-14 17:01:34 0.00 11.40 2.97% ATRA 2025-11-14 18:01:34 17.09 13.49 2.76% ATRA 2025-11-14 21:02:08 0.00 0.00 2.76% 2025-11-17 ATRA 2025-11-17 06:01:31 16.05 10.43 2.76% ATRA 2025-11-17 10:01:25 16.05 12.04 2.76% ATRA 2025-11-17 11:01:10 12.93 12.63 -6.87% ATRA 2025-11-17 12:01:23 13.60 13.43 -1.79% ATRA 2025-11-17 13:01:20 13.50 13.23 -2.76% ATRA 2025-11-17 14:01:44 13.34 12.97 -4.33% ATRA 2025-11-17 15:01:21 13.25 12.97 -4.33% ATRA 2025-11-17 16:01:34 13.21 12.90 -5.15% ATRA 2025-11-17 17:02:11 13.50 12.85 -2.99% ATRA 2025-11-17 18:01:29 13.50 12.85 -2.91% ATRA 2025-11-17 21:02:10 0.00 0.00 -2.91% 2025-11-18 ATRA 2025-11-18 06:01:35 14.90 10.43 -2.91% ATRA 2025-11-18 11:01:37 13.10 12.90 -0.07% ATRA 2025-11-18 13:01:24 13.59 13.43 2.83% ATRA 2025-11-18 14:01:18 13.69 13.37 2.76% ATRA 2025-11-18 15:01:28 13.51 13.30 2.83% ATRA 2025-11-18 16:01:21 13.84 13.43 3.05% ATRA 2025-11-18 17:01:32 0.00 0.00 2.69% ATRA 2025-11-18 18:01:20 15.73 13.20 2.82% ATRA 2025-11-18 21:03:41 0.00 0.00 2.82% ATRA 2025-11-18 22:01:32 15.73 13.20 2.82% 2025-11-19 ATRA 2025-11-19 06:01:21 16.05 10.43 2.82% ATRA 2025-11-19 07:01:21 16.05 11.47 2.82% ATRA 2025-11-19 08:01:25 15.73 11.47 2.82% ATRA 2025-11-19 10:01:21 15.73 12.08 2.82% ATRA 2025-11-19 11:01:21 13.75 13.49 1.98% ATRA 2025-11-19 12:01:23 13.90 13.68 1.76% ATRA 2025-11-19 13:01:23 13.63 13.44 1.68% ATRA 2025-11-19 14:01:24 13.94 13.43 1.91% ATRA 2025-11-19 15:01:25 13.69 13.35 0.00% ATRA 2025-11-19 16:01:30 13.80 13.36 -0.61% ATRA 2025-11-19 17:01:21 14.05 0.00 2.14% ATRA 2025-11-19 18:01:28 14.05 12.08 2.08% ATRA 2025-11-19 21:02:38 0.00 0.00 2.08% 2025-11-20 ATRA 2025-11-20 06:01:20 15.14 10.43 2.08% ATRA 2025-11-20 08:01:24 15.14 12.08 2.08% ATRA 2025-11-20 10:01:25 15.11 12.08 2.08% ATRA 2025-11-20 11:01:27 14.42 14.08 4.16% ATRA 2025-11-20 12:01:17 14.49 14.17 3.49% ATRA 2025-11-20 13:01:33 15.00 14.57 9.06% ATRA 2025-11-20 14:01:28 14.67 14.13 4.98% ATRA 2025-11-20 15:01:31 13.62 13.30 -1.78% ATRA 2025-11-20 16:01:36 13.54 13.30 -2.38% ATRA 2025-11-20 17:01:37 14.99 12.96 -3.79% ATRA 2025-11-20 18:01:52 14.70 12.96 -3.71% ATRA 2025-11-20 19:02:00 14.95 12.96 -3.71% ATRA 2025-11-20 21:02:17 0.00 0.00 -3.71% 2025-11-21 ATRA 2025-11-21 06:01:50 18.45 10.43 -3.71% ATRA 2025-11-21 07:01:36 15.10 10.43 -3.42% ATRA 2025-11-21 10:02:36 15.10 10.43 3.28% ATRA 2025-11-21 11:01:23 14.00 13.34 3.42% ATRA 2025-11-21 12:01:23 13.72 13.52 2.47% ATRA 2025-11-21 13:01:34 13.86 13.70 3.35% ATRA 2025-11-21 14:01:25 14.10 13.86 6.33% ATRA 2025-11-21 15:01:44 14.10 13.87 5.46% ATRA 2025-11-21 16:01:36 14.05 13.84 5.39% ATRA 2025-11-21 17:01:33 14.99 12.80 3.35% ATRA 2025-11-21 18:01:28 14.99 13.41 3.48% ATRA 2025-11-21 21:02:59 0.00 0.00 3.48% 2025-11-24 ATRA 2025-11-24 00:10:52 0.00 0.00 1.44% ATRA 2025-11-24 06:01:32 14.84 12.05 1.44% ATRA 2025-11-24 08:01:33 15.00 12.52 1.44% ATRA 2025-11-24 11:01:22 14.35 14.05 5.07% ATRA 2025-11-24 12:01:26 14.22 14.07 2.95% ATRA 2025-11-24 13:01:22 13.92 13.75 1.29% ATRA 2025-11-24 14:04:12 13.65 13.46 -0.23% ATRA 2025-11-24 15:01:28 13.84 13.56 1.13% ATRA 2025-11-24 16:03:12 13.84 13.69 1.21% ATRA 2025-11-24 17:01:48 0.00 13.76 2.72% ATRA 2025-11-24 18:01:34 16.60 13.76 2.63% ATRA 2025-11-24 19:01:26 16.43 13.76 5.34% ATRA 2025-11-24 21:01:43 0.00 0.00 5.34% 2025-11-25 ATRA 2025-11-25 06:02:04 15.25 12.81 5.34% ATRA 2025-11-25 11:01:28 14.40 14.13 2.34% ATRA 2025-11-25 12:01:36 14.44 14.22 2.92% ATRA 2025-11-25 13:01:20 14.49 14.24 2.19% ATRA 2025-11-25 14:01:29 14.65 14.30 4.53% ATRA 2025-11-25 15:01:19 14.75 14.41 4.09% ATRA 2025-11-25 16:01:33 14.55 14.47 3.87% ATRA 2025-11-25 17:01:26 14.99 12.80 4.02% ATRA 2025-11-25 18:01:21 14.99 12.81 3.92% ATRA 2025-11-25 21:01:46 0.00 0.00 3.92% 2025-11-26 ATRA 2025-11-26 06:01:29 16.28 13.27 3.92% ATRA 2025-11-26 10:01:26 16.28 13.33 3.92% ATRA 2025-11-26 11:01:20 14.96 14.74 1.07% ATRA 2025-11-26 12:01:22 14.99 14.76 2.21% ATRA 2025-11-26 13:01:38 15.00 14.83 2.99% ATRA 2025-11-26 14:01:30 14.98 14.85 2.00% ATRA 2025-11-26 15:01:20 15.00 14.89 2.99% ATRA 2025-11-26 16:01:29 15.20 15.10 4.56% ATRA 2025-11-26 17:01:24 15.58 0.00 2.07% ATRA 2025-11-26 18:01:37 15.58 13.27 1.99% ATRA 2025-11-26 21:01:55 0.00 0.00 1.99%