$ATRA: Atara Biotherapeutics, Inc. - Common Stock
2025-09-29 ATRA 2025-09-29 00:01:53 0.00 0.00 -0.62% ATRA 2025-09-29 05:01:10 15.41 10.70 -0.62% ATRA 2025-09-29 07:01:09 15.41 12.35 -0.62% ATRA 2025-09-29 09:01:04 15.73 12.35 -0.62% ATRA 2025-09-29 10:01:12 14.00 13.55 1.70% ATRA 2025-09-29 11:01:03 14.00 13.67 0.08% ATRA 2025-09-29 12:01:15 13.86 13.69 0.77% ATRA 2025-09-29 13:01:05 13.85 13.65 0.69% ATRA 2025-09-29 14:01:20 14.00 13.64 -0.46% ATRA 2025-09-29 15:01:10 14.00 13.68 -0.23% ATRA 2025-09-29 16:01:25 15.00 11.32 0.62% ATRA 2025-09-29 17:01:12 15.00 13.54 0.62% ATRA 2025-09-29 18:01:21 14.00 10.70 0.62% ATRA 2025-09-29 20:01:26 0.00 0.00 0.62% 2025-09-30 ATRA 2025-09-30 05:01:11 17.80 10.70 0.62% ATRA 2025-09-30 07:01:08 15.73 10.70 0.62% ATRA 2025-09-30 10:01:13 14.01 13.67 -0.46% ATRA 2025-09-30 11:01:04 13.68 13.25 -3.24% ATRA 2025-09-30 12:01:11 13.56 13.24 -3.47% ATRA 2025-09-30 13:01:07 13.56 13.22 -3.93% ATRA 2025-09-30 14:01:20 13.99 13.57 0.69% ATRA 2025-09-30 15:01:11 14.31 13.95 1.39% ATRA 2025-09-30 16:01:20 14.35 14.05 4.01% ATRA 2025-09-30 17:01:09 14.66 14.05 3.84% ATRA 2025-09-30 18:01:20 14.66 13.64 3.84% ATRA 2025-09-30 20:01:24 0.00 0.00 3.84% 2025-10-01 ATRA 2025-10-01 05:01:12 21.71 13.30 3.84% ATRA 2025-10-01 07:01:06 16.28 13.30 3.84% ATRA 2025-10-01 08:01:15 15.55 13.30 3.84% ATRA 2025-10-01 09:01:06 18.34 13.30 3.84% ATRA 2025-10-01 10:01:14 14.51 14.22 0.94% ATRA 2025-10-01 11:01:04 14.63 14.38 1.52% ATRA 2025-10-01 12:01:13 14.66 14.38 0.58% ATRA 2025-10-01 13:01:11 14.44 14.28 0.00% ATRA 2025-10-01 14:01:21 14.36 14.21 -0.22% ATRA 2025-10-01 15:01:12 14.51 14.32 0.58% ATRA 2025-10-01 16:01:22 14.50 14.21 0.94% ATRA 2025-10-01 17:01:12 14.50 14.21 0.91% ATRA 2025-10-01 20:01:25 0.00 0.00 0.91% 2025-10-02 ATRA 2025-10-02 05:01:09 17.36 10.70 0.91% ATRA 2025-10-02 06:01:13 14.45 10.70 0.91% ATRA 2025-10-02 08:01:15 15.68 14.00 0.07% ATRA 2025-10-02 10:01:11 14.65 14.26 -0.91% ATRA 2025-10-02 11:01:07 14.39 14.10 -2.37% ATRA 2025-10-02 12:01:14 14.39 14.02 -2.93% ATRA 2025-10-02 13:01:08 14.40 14.19 -0.56% ATRA 2025-10-02 14:01:19 14.53 14.38 0.42% ATRA 2025-10-02 15:01:12 14.58 14.43 0.00% ATRA 2025-10-02 16:01:21 15.48 13.82 0.28% ATRA 2025-10-02 17:01:12 16.06 14.20 0.28% ATRA 2025-10-02 18:01:20 16.06 12.02 0.28% ATRA 2025-10-02 20:01:28 0.00 0.00 0.28% 2025-10-03 ATRA 2025-10-03 05:01:12 21.71 12.44 0.28% ATRA 2025-10-03 06:01:17 19.72 12.44 0.28% ATRA 2025-10-03 07:01:10 16.28 12.44 0.28% ATRA 2025-10-03 10:01:14 14.80 14.20 1.94% ATRA 2025-10-03 11:01:02 14.72 14.55 1.73% ATRA 2025-10-03 12:01:14 14.80 14.62 1.87% ATRA 2025-10-03 13:01:11 14.51 14.22 0.28% ATRA 2025-10-03 14:01:16 14.67 14.10 -1.80% ATRA 2025-10-03 15:01:05 14.41 14.10 -1.87% ATRA 2025-10-03 16:01:15 14.75 13.82 -0.48% ATRA 2025-10-03 17:01:07 15.25 13.82 -0.48% ATRA 2025-10-03 18:01:19 15.25 12.87 -0.48% ATRA 2025-10-03 20:01:19 0.00 0.00 -0.48% 2025-10-06 ATRA 2025-10-06 05:01:05 16.55 14.40 -0.48% ATRA 2025-10-06 07:01:06 14.41 14.40 -0.48% ATRA 2025-10-06 10:01:19 14.38 14.25 -0.97% ATRA 2025-10-06 11:01:09 14.38 14.18 -1.52% ATRA 2025-10-06 12:01:22 14.35 14.21 -1.04% ATRA 2025-10-06 13:01:10 14.21 14.05 -1.73% ATRA 2025-10-06 14:01:21 14.17 14.01 -2.21% ATRA 2025-10-06 15:01:12 14.13 13.97 -2.84% ATRA 2025-10-06 16:01:22 14.75 13.71 -2.91% ATRA 2025-10-06 17:32:17 8-K Sec report https://www.sec.gov/Archives/edgar/data/1604464/000119312525232117/0001193125-25-232117-index.htm 8-K - Atara Biotherapeutics, Inc. (0001604464) (Filer) ATRA 2025-10-06 18:01:25 14.75 10.11 -2.91% ATRA 2025-10-06 20:01:25 0.00 0.00 -4.79% 2025-10-07 ATRA 2025-10-07 05:01:11 16.55 12.35 -4.79% ATRA 2025-10-07 07:01:07 16.02 12.35 -4.79% ATRA 2025-10-07 10:01:18 14.29 14.10 1.46% ATRA 2025-10-07 11:01:06 14.50 14.32 2.98% ATRA 2025-10-07 12:01:18 14.84 14.66 4.86% ATRA 2025-10-07 13:01:10 15.36 15.25 9.09% ATRA 2025-10-07 14:01:19 15.68 15.26 10.41% ATRA 2025-10-07 15:01:12 15.61 15.51 11.10% ATRA 2025-10-07 16:01:22 16.50 13.90 11.52% ATRA 2025-10-07 17:01:15 16.50 15.65 11.87% ATRA 2025-10-07 20:01:27 0.00 0.00 14.45% 2025-10-08 ATRA 2025-10-08 05:01:13 21.71 13.97 14.45% ATRA 2025-10-08 06:01:21 16.50 13.97 14.45% ATRA 2025-10-08 08:01:17 16.50 14.30 14.45% ATRA 2025-10-08 09:01:08 16.50 15.63 14.45% ATRA 2025-10-08 10:01:16 15.58 15.20 -2.00% ATRA 2025-10-08 11:01:07 15.20 14.85 -5.08% ATRA 2025-10-08 12:01:21 15.62 15.40 -0.64% ATRA 2025-10-08 13:01:14 15.51 15.41 -1.14% ATRA 2025-10-08 14:01:23 15.50 15.41 -1.57% ATRA 2025-10-08 15:01:13 15.90 15.73 1.36% ATRA 2025-10-08 16:01:25 17.24 15.53 1.57% ATRA 2025-10-08 17:01:14 17.69 15.53 1.41% ATRA 2025-10-08 18:01:25 17.69 14.00 1.41% ATRA 2025-10-08 20:01:24 0.00 0.00 1.41% 2025-10-09 ATRA 2025-10-09 05:01:13 16.50 10.11 1.41% ATRA 2025-10-09 07:01:10 16.50 12.77 1.41% ATRA 2025-10-09 08:01:14 16.50 12.81 1.41% ATRA 2025-10-09 09:01:04 16.50 13.70 1.41% ATRA 2025-10-09 10:01:13 16.64 16.30 4.41% ATRA 2025-10-09 11:01:03 16.50 16.26 4.22% ATRA 2025-10-09 12:01:15 16.60 16.20 3.20% ATRA 2025-10-09 13:01:06 16.50 16.16 3.26% ATRA 2025-10-09 14:01:19 16.34 16.19 2.24% ATRA 2025-10-09 15:01:08 16.39 16.05 1.92% ATRA 2025-10-09 16:01:20 16.72 15.50 1.54% ATRA 2025-10-09 17:01:11 18.50 14.35 1.51% ATRA 2025-10-09 20:01:27 0.00 0.00 1.51% 2025-10-10 ATRA 2025-10-10 05:01:11 16.70 10.11 1.51% ATRA 2025-10-10 07:01:06 16.70 12.81 1.51% ATRA 2025-10-10 09:01:05 17.00 12.81 1.51% ATRA 2025-10-10 10:01:14 16.00 15.33 -2.59% ATRA 2025-10-10 11:01:04 15.46 15.00 -5.17% ATRA 2025-10-10 12:01:16 15.02 14.32 -9.59% ATRA 2025-10-10 13:01:13 15.02 14.65 -8.01% ATRA 2025-10-10 14:01:24 15.03 14.65 -7.51% ATRA 2025-10-10 15:01:17 14.55 14.26 -12.43% ATRA 2025-10-10 16:01:22 16.71 12.81 -10.98% ATRA 2025-10-10 17:01:12 15.35 12.81 -10.82% ATRA 2025-10-10 18:01:21 15.52 12.99 -10.82% ATRA 2025-10-10 19:01:15 16.71 14.41 -3.73% ATRA 2025-10-10 20:01:25 0.00 0.00 -10.32% 2025-10-13 ATRA 2025-10-13 06:01:26 21.71 13.99 -10.32% ATRA 2025-10-13 07:01:12 18.45 13.99 -10.32% ATRA 2025-10-13 08:01:27 18.45 14.30 -10.32% ATRA 2025-10-13 09:01:15 17.68 14.30 -10.32% ATRA 2025-10-13 10:01:28 14.57 14.44 1.12% ATRA 2025-10-13 11:01:15 14.60 14.48 1.31% ATRA 2025-10-13 12:01:24 15.14 14.99 5.10% ATRA 2025-10-13 13:01:15 15.21 14.82 4.85% ATRA 2025-10-13 14:01:25 15.27 15.15 5.22% ATRA 2025-10-13 15:01:16 15.10 14.99 4.54% ATRA 2025-10-13 16:01:27 16.00 14.75 4.48% ATRA 2025-10-13 17:01:13 17.68 14.75 4.48% ATRA 2025-10-13 18:01:25 17.68 14.50 4.48% ATRA 2025-10-13 20:01:27 0.00 0.00 4.48% 2025-10-14 ATRA 2025-10-14 05:01:15 16.32 10.11 4.48% ATRA 2025-10-14 07:01:10 16.32 12.81 4.48% ATRA 2025-10-14 10:01:17 14.80 14.30 -2.67% ATRA 2025-10-14 11:01:08 14.67 14.40 -3.11% ATRA 2025-10-14 12:01:19 14.46 14.32 -4.17% ATRA 2025-10-14 13:01:07 14.70 14.44 -2.43% ATRA 2025-10-14 14:01:20 14.80 14.61 -2.36% ATRA 2025-10-14 15:01:13 14.61 14.36 -2.61% ATRA 2025-10-14 16:01:20 14.80 14.27 -2.61% ATRA 2025-10-14 17:01:14 14.80 14.27 -2.79% ATRA 2025-10-14 20:01:21 0.00 0.00 -2.79% 2025-10-15 ATRA 2025-10-15 05:01:08 21.71 13.37 -2.79% ATRA 2025-10-15 06:01:17 21.71 14.11 -2.79% ATRA 2025-10-15 07:01:10 18.50 14.11 -2.79% ATRA 2025-10-15 08:01:16 17.68 14.11 -2.79% ATRA 2025-10-15 09:01:07 16.82 14.11 -2.79% ATRA 2025-10-15 10:01:14 15.20 15.10 3.99% ATRA 2025-10-15 11:01:07 15.20 15.01 3.99% ATRA 2025-10-15 12:01:19 15.39 15.12 4.99% ATRA 2025-10-15 13:01:11 15.47 15.12 4.99% ATRA 2025-10-15 14:01:21 15.35 15.22 4.92% ATRA 2025-10-15 15:01:12 15.30 15.05 3.86% ATRA 2025-10-15 16:01:21 17.24 14.75 4.52% ATRA 2025-10-15 17:01:15 16.82 14.99 4.65% ATRA 2025-10-15 18:01:22 16.82 14.75 4.65% ATRA 2025-10-15 20:01:25 0.00 0.00 4.65% 2025-10-16 ATRA 2025-10-16 05:01:16 21.71 13.05 4.65% ATRA 2025-10-16 07:01:07 18.50 13.05 4.65% ATRA 2025-10-16 08:01:16 16.00 13.05 4.65% ATRA 2025-10-16 10:01:16 15.93 15.55 2.46% ATRA 2025-10-16 11:01:01 15.59 15.50 2.26% ATRA 2025-10-16 12:01:14 15.68 15.20 1.16% ATRA 2025-10-16 13:01:13 15.34 15.00 -0.62% ATRA 2025-10-16 14:01:23 15.44 15.00 -0.41% ATRA 2025-10-16 15:01:18 15.20 14.88 -0.62% ATRA 2025-10-16 16:01:26 16.50 14.53 -0.14% ATRA 2025-10-16 17:01:14 17.68 14.95 -0.13% ATRA 2025-10-16 18:01:24 17.68 13.05 -0.13% ATRA 2025-10-16 20:01:26 0.00 0.00 -0.13% 2025-10-17 ATRA 2025-10-17 05:01:15 21.71 14.70 -0.13% ATRA 2025-10-17 07:01:16 18.50 14.70 -0.13% ATRA 2025-10-17 08:01:19 17.68 14.70 -0.13% ATRA 2025-10-17 10:01:14 15.94 15.05 -0.98% ATRA 2025-10-17 11:01:03 15.11 14.92 -0.26% ATRA 2025-10-17 12:01:16 15.01 14.76 -1.57% ATRA 2025-10-17 13:01:07 14.95 14.24 -3.14% ATRA 2025-10-17 14:01:20 14.92 14.62 -3.08% ATRA 2025-10-17 15:01:11 14.86 14.68 -3.08% ATRA 2025-10-17 16:01:19 16.27 14.40 -2.81% ATRA 2025-10-17 17:01:13 17.68 15.43 1.25% ATRA 2025-10-17 18:01:23 15.43 12.81 1.25% ATRA 2025-10-17 20:01:24 0.00 0.00 1.25% 2025-10-20 ATRA 2025-10-20 05:01:09 0.00 0.00 -5.31% ATRA 2025-10-20 06:01:18 16.10 10.11 -5.31% ATRA 2025-10-20 07:01:06 16.10 12.96 -5.31% ATRA 2025-10-20 08:01:15 16.10 12.93 -5.31% ATRA 2025-10-20 10:01:13 15.42 15.01 0.07% ATRA 2025-10-20 11:01:06 15.48 15.41 4.33% ATRA 2025-10-20 12:01:21 15.42 15.36 3.93% ATRA 2025-10-20 13:01:12 15.59 15.31 4.59% ATRA 2025-10-20 14:01:23 15.75 15.30 3.74% ATRA 2025-10-20 15:01:12 15.86 15.67 6.56% ATRA 2025-10-20 16:01:30 16.94 15.50 8.07% ATRA 2025-10-20 17:01:19 17.68 15.50 8.31% ATRA 2025-10-20 20:01:27 0.00 0.00 8.31% 2025-10-21 ATRA 2025-10-21 04:01:27 18.80 0.00 8.31% ATRA 2025-10-21 05:01:17 17.62 10.11 8.31% ATRA 2025-10-21 06:01:21 16.12 10.11 8.31% ATRA 2025-10-21 07:01:10 16.12 13.73 8.31% ATRA 2025-10-21 10:01:12 15.97 15.15 -3.11% ATRA 2025-10-21 11:01:04 15.85 15.61 -2.57% ATRA 2025-10-21 12:01:11 16.10 15.92 -0.47% ATRA 2025-10-21 13:01:07 16.02 15.86 -0.47% ATRA 2025-10-21 14:01:18 16.15 15.90 0.27% ATRA 2025-10-21 15:01:13 16.15 15.58 -1.35% ATRA 2025-10-21 16:01:28 16.24 15.50 -1.62% ATRA 2025-10-21 17:01:16 16.24 15.49 -1.50% ATRA 2025-10-21 18:01:25 16.24 11.82 -1.50% ATRA 2025-10-21 20:01:27 0.00 0.00 -1.50% 2025-10-22 ATRA 2025-10-22 05:01:19 17.62 15.00 -1.50% ATRA 2025-10-22 10:01:15 15.79 15.34 -2.37% ATRA 2025-10-22 11:01:03 15.51 15.34 -1.75% ATRA 2025-10-22 12:01:29 15.35 15.13 -3.55% ATRA 2025-10-22 13:01:34 15.10 14.89 -5.42% ATRA 2025-10-22 14:01:35 15.09 14.76 -6.17% ATRA 2025-10-22 15:01:23 15.09 14.74 -6.86% ATRA 2025-10-22 16:01:40 0.00 13.33 -7.17% ATRA 2025-10-22 17:01:23 16.77 14.35 -7.28% ATRA 2025-10-22 18:01:35 16.77 13.27 -7.28% ATRA 2025-10-22 19:01:25 14.95 13.27 -7.28% ATRA 2025-10-22 20:01:33 0.00 0.00 -7.28% 2025-10-23 ATRA 2025-10-23 05:01:32 21.71 14.60 -7.28% ATRA 2025-10-23 06:01:32 21.71 14.75 -7.28% ATRA 2025-10-23 07:01:17 18.50 14.75 -7.28% ATRA 2025-10-23 09:01:15 18.31 14.75 -7.28% ATRA 2025-10-23 10:01:26 15.25 14.59 0.25% ATRA 2025-10-23 11:01:09 14.79 14.52 -0.51% ATRA 2025-10-23 12:01:22 14.95 14.60 -0.19% ATRA 2025-10-23 13:01:20 14.71 14.10 -1.01% ATRA 2025-10-23 14:01:23 14.40 14.25 -1.90% ATRA 2025-10-23 15:01:18 14.47 14.25 -2.09% ATRA 2025-10-23 16:01:32 15.30 13.85 -3.17% ATRA 2025-10-23 17:01:26 15.30 13.85 -3.42% ATRA 2025-10-23 18:01:30 15.30 14.05 -3.42% ATRA 2025-10-23 20:01:34 0.00 0.00 -3.42% 2025-10-24 ATRA 2025-10-24 05:01:23 16.05 11.82 -3.42% ATRA 2025-10-24 06:01:36 16.05 12.63 -3.42% ATRA 2025-10-24 09:01:13 16.05 12.82 -3.42% ATRA 2025-10-24 10:01:20 14.35 14.15 0.96% ATRA 2025-10-24 11:01:11 14.69 14.15 0.68% ATRA 2025-10-24 12:01:22 14.60 14.21 1.64% ATRA 2025-10-24 13:01:22 14.60 14.26 2.12% ATRA 2025-10-24 14:01:32 14.50 14.27 1.16% ATRA 2025-10-24 15:01:23 14.51 14.16 1.44% ATRA 2025-10-24 16:01:34 18.50 14.15 2.60% ATRA 2025-10-24 17:01:25 15.71 14.21 2.69% ATRA 2025-10-24 18:01:39 15.71 12.80 2.69% ATRA 2025-10-24 20:01:33 0.00 0.00 2.69% 2025-10-27 ATRA 2025-10-27 05:01:33 16.05 10.11 2.69% ATRA 2025-10-27 07:01:40 16.05 14.00 2.69% ATRA 2025-10-27 08:01:54 16.05 14.10 2.69% ATRA 2025-10-27 10:01:49 14.95 14.53 0.42% ATRA 2025-10-27 11:01:34 14.95 14.57 1.27% ATRA 2025-10-27 12:01:47 14.90 14.51 0.57% ATRA 2025-10-27 13:01:40 15.08 14.96 3.47% ATRA 2025-10-27 14:01:55 15.45 15.12 4.67% ATRA 2025-10-27 15:01:47 15.29 14.99 5.74% ATRA 2025-10-27 16:01:33 16.66 13.61 7.79% ATRA 2025-10-27 17:01:29 16.66 15.28 7.59% ATRA 2025-10-27 18:01:39 16.66 12.94 7.59% ATRA 2025-10-27 20:01:36 0.00 0.00 7.59% 2025-10-28 ATRA 2025-10-28 05:01:19 17.09 11.48 7.59% ATRA 2025-10-28 06:01:28 17.09 14.76 7.59% ATRA 2025-10-28 07:01:15 16.05 14.76 7.59% ATRA 2025-10-28 10:01:26 15.40 15.05 -1.59% ATRA 2025-10-28 11:01:09 15.72 15.55 0.90% ATRA 2025-10-28 12:01:33 15.69 15.35 0.69% ATRA 2025-10-28 13:01:30 15.71 15.59 -0.21% ATRA 2025-10-28 14:01:26 15.74 15.23 -0.07% ATRA 2025-10-28 15:01:14 15.39 15.05 -1.66% ATRA 2025-10-28 16:01:30 16.25 11.31 -2.55% ATRA 2025-10-28 17:01:24 16.25 14.92 -2.37% ATRA 2025-10-28 18:01:20 16.25 13.64 -2.37%