Columbia Banking System Inc (COLB) — Price History

As of 2026-08-07 — refreshed nightly from the Closelook data lake. Diary readings, not advice.

Daily prices

Date	Open	High	Low	Close	Chg %	Volume
2026-08-07	30.94	31.29	30.76	31.24	+0.68%	2,881,800
2026-08-06	31.64	31.69	31.01	31.03	-1.02%	1,871,200
2026-08-05	31.93	31.99	31.33	31.35	-1.35%	1,925,000
2026-08-04	31.65	32.18	31.44	31.78	+0.89%	2,329,500
2026-08-03	31.43	31.75	31.27	31.50	+0.74%	2,583,700
2026-07-31	31.50	31.50	30.87	31.27	+0.06%	2,966,200
2026-07-30	31.06	31.40	31.00	31.25	+1.53%	4,174,100
2026-07-29	31.09	31.25	30.75	30.78	-1.57%	2,677,000
2026-07-28	30.90	31.34	30.90	31.27	+1.20%	2,873,300
2026-07-27	31.37	31.56	30.87	30.90	-0.80%	2,940,800
2026-07-24	31.04	31.65	30.82	31.15	-3.44%	5,851,500
2026-07-23	32.25	32.30	31.56	32.26	-1.13%	4,889,100
2026-07-22	32.90	32.97	32.38	32.63	-0.67%	2,549,600
2026-07-21	32.80	32.86	32.34	32.85	+0.15%	2,551,067
2026-07-20	33.33	33.46	32.62	32.80	-1.32%	2,851,790
2026-07-17	33.40	33.65	32.96	33.24	-1.10%	3,224,000
2026-07-16	32.59	33.68	32.59	33.61	+3.19%	3,500,800
2026-07-15	32.32	32.77	32.26	32.57	+0.99%	3,430,200
2026-07-14	32.09	32.54	32.06	32.25	+0.84%	2,074,000
2026-07-13	32.11	32.20	31.79	31.98	-0.22%	2,011,000
2026-07-10	32.00	32.21	31.79	32.05	+0.72%	1,746,300
2026-07-09	31.48	31.98	31.48	31.82	+1.76%	2,467,500
2026-07-08	32.03	32.05	30.84	31.27	-2.65%	2,613,800
2026-07-07	32.34	32.37	32.00	32.12	-0.37%	2,281,200
2026-07-06	31.73	32.25	31.65	32.24	+1.64%	2,634,800
2026-07-02	32.63	32.77	31.60	31.72	-2.43%	3,434,800
2026-07-01	32.20	32.72	31.94	32.51	+1.44%	3,082,300
2026-06-30	31.92	32.26	31.72	32.05	+0.19%	2,470,000
2026-06-29	32.08	32.21	31.72	31.99	-0.50%	2,640,100
2026-06-26	32.12	32.26	31.84	32.15	+0.25%	5,394,500
2026-06-25	31.58	32.25	31.30	32.07	+1.71%	2,923,400
2026-06-24	31.29	31.57	31.02	31.53	+0.83%	2,354,800
2026-06-23	30.80	31.32	30.72	31.27	+1.30%	2,389,100
2026-06-22	30.56	31.00	30.56	30.87	+1.05%	2,685,000
2026-06-18	30.31	30.63	30.13	30.55	+1.66%	6,000,400
2026-06-17	30.78	31.10	29.77	30.05	-2.69%	3,700,800
2026-06-16	31.16	31.78	30.83	30.88	-0.23%	2,463,200
2026-06-15	31.75	31.84	30.87	30.95	-1.15%	3,584,800
2026-06-12	31.00	31.46	30.95	31.31	+1.59%	2,708,400
2026-06-11	30.39	30.84	30.15	30.82	+1.65%	2,407,700
2026-06-10	30.15	30.71	30.13	30.32	+0.56%	2,757,700
2026-06-09	30.00	30.87	29.79	30.15	+1.58%	3,140,100
2026-06-08	29.74	29.99	29.53	29.68	+0.07%	4,220,200
2026-06-05	29.56	29.93	29.46	29.66	+0.54%	2,249,300
2026-06-04	28.87	29.58	28.87	29.50	+3.18%	2,923,400
2026-06-03	29.04	29.10	28.55	28.59	-2.02%	2,763,500
2026-06-02	29.00	29.48	28.95	29.18	+0.62%	2,816,900
2026-06-01	29.28	29.42	28.94	29.00	-2.16%	2,461,700
2026-05-29	29.27	29.81	29.05	29.64	+0.00%	3,481,800
2026-05-28	29.70	29.73	29.32	29.64	-0.50%	2,683,900
2026-05-27	30.13	30.24	29.56	29.79	-0.93%	3,201,400
2026-05-26	29.96	30.23	29.70	30.07	+1.14%	2,237,400
2026-05-22	29.80	29.82	29.59	29.73	+0.37%	1,438,200
2026-05-21	29.57	29.65	29.19	29.62	-0.17%	2,049,500
2026-05-20	28.91	29.79	28.75	29.67	+3.27%	2,297,300
2026-05-19	28.95	29.03	28.54	28.73	-0.97%	2,671,400
2026-05-18	28.88	29.34	28.88	29.01	+0.83%	2,480,500
2026-05-15	29.12	29.22	28.49	28.77	-1.20%	3,184,200
2026-05-14	29.04	29.33	28.96	29.12	+1.43%	6,210,600
2026-05-13	29.07	29.11	28.55	28.71	-1.31%	2,799,300
2026-05-12	29.47	29.65	28.74	29.09	-1.12%	2,839,800
2026-05-11	30.11	30.25	29.35	29.42	-2.06%	2,974,900
2026-05-08	29.64	30.11	29.64	30.04	+1.62%	3,399,000
2026-05-07	30.24	30.46	29.46	29.56	-2.12%	2,331,400
2026-05-06	30.10	30.38	29.96	30.20	+1.65%	2,667,400
2026-05-05	29.13	29.83	29.07	29.71	+2.20%	2,396,300
2026-05-04	29.36	29.47	28.94	29.07	-1.66%	2,583,400
2026-05-01	29.44	29.98	29.28	29.56	-0.14%	1,835,400
2026-04-30	29.11	29.91	28.94	29.60	+1.65%	2,396,200
2026-04-29	29.59	29.68	28.91	29.12	-1.69%	2,033,600
2026-04-28	30.10	30.19	29.54	29.62	-0.77%	2,351,100
2026-04-27	29.25	29.96	29.25	29.85	+2.16%	2,419,700
2026-04-24	29.05	29.73	28.78	29.22	-1.45%	3,183,300
2026-04-23	29.13	29.80	28.97	29.65	+2.24%	3,066,300
2026-04-22	29.30	29.39	28.86	29.00	-0.31%	3,199,500
2026-04-21	29.68	29.98	29.04	29.09	-1.99%	1,890,500
2026-04-20	29.60	29.87	29.37	29.68	+0.17%	2,243,800
2026-04-17	29.40	30.11	29.37	29.63	+2.28%	2,047,100
2026-04-16	29.10	29.28	28.86	28.97	-0.45%	1,942,200
2026-04-15	29.05	29.26	28.79	29.10	+0.17%	1,550,200
2026-04-14	28.96	29.28	28.92	29.05	-0.38%	1,402,900
2026-04-13	28.82	29.20	28.59	29.16	+0.69%	4,222,000
2026-04-10	29.53	29.62	28.94	28.96	-2.06%	1,987,600
2026-04-09	28.69	29.66	28.69	29.57	+2.39%	2,751,300
2026-04-08	28.56	29.23	28.56	28.88	+4.34%	4,770,300
2026-04-07	27.86	28.08	27.50	27.68	-1.28%	4,440,100
2026-04-06	27.72	28.14	27.58	28.04	+1.12%	2,049,900
2026-04-02	27.41	27.89	27.23	27.73	-0.68%	2,328,700
2026-04-01	27.65	28.25	27.57	27.92	+1.79%	2,444,500
2026-03-31	27.24	27.75	27.13	27.43	+2.39%	4,530,800
2026-03-30	26.81	27.08	26.57	26.79	+0.34%	2,557,000
2026-03-27	27.25	27.28	26.65	26.70	-2.77%	1,973,400
2026-03-26	27.44	27.60	27.26	27.46	-0.51%	1,890,800
2026-03-25	27.64	27.80	27.19	27.60	+0.73%	2,337,700
2026-03-24	26.71	27.52	26.61	27.40	+1.97%	2,934,400
2026-03-23	26.95	27.48	26.65	26.87	+2.79%	3,507,200
2026-03-20	26.37	26.57	25.83	26.14	-1.02%	9,223,400
2026-03-19	26.00	26.61	25.68	26.41	+0.80%	2,653,700
2026-03-18	26.41	26.61	26.16	26.20	-1.02%	2,860,900
2026-03-17	26.69	26.82	26.27	26.47	+0.46%	2,622,600
2026-03-16	26.67	26.83	26.30	26.35	+0.46%	1,992,300
2026-03-13	26.65	26.86	26.14	26.23	-0.72%	3,081,600
2026-03-12	26.15	26.65	26.08	26.42	-1.31%	2,560,200
2026-03-11	26.77	27.03	26.31	26.77	-0.70%	2,890,500
2026-03-10	27.12	27.62	26.73	26.96	-0.55%	2,532,700
2026-03-09	26.87	27.42	26.12	27.11	-0.70%	3,414,600
2026-03-06	27.32	27.52	26.42	27.30	-2.50%	2,471,200
2026-03-05	28.26	28.42	27.69	28.00	-2.03%	2,464,200
2026-03-04	28.65	28.95	28.45	28.58	-0.35%	2,628,400
2026-03-03	28.51	28.95	27.83	28.68	-1.24%	3,428,700
2026-03-02	27.92	29.19	27.70	29.04	+2.07%	3,152,400
2026-02-27	29.57	29.72	28.15	28.45	-6.97%	4,547,900
2026-02-26	30.55	31.21	30.21	30.58	+0.46%	3,237,400
2026-02-25	30.20	30.51	29.84	30.44	+1.94%	3,341,500
2026-02-24	30.03	30.19	29.59	29.86	-0.70%	2,825,800
2026-02-23	31.69	31.74	29.89	30.07	-5.32%	3,255,200
2026-02-20	31.17	31.81	30.93	31.76	+1.83%	3,073,200
2026-02-19	31.18	31.41	30.80	31.19	-0.16%	2,594,600
2026-02-18	31.29	32.12	31.19	31.24	-0.19%	3,434,400
2026-02-17	31.59	32.00	31.15	31.30	-0.60%	2,697,800
2026-02-13	31.10	31.63	30.79	31.49	+0.77%	3,291,500
2026-02-12	31.99	32.21	30.75	31.25	-1.20%	4,149,300
2026-02-11	32.24	32.62	31.38	31.63	-1.22%	2,035,300
2026-02-10	32.37	32.60	31.72	32.02	-1.23%	2,382,300
2026-02-09	32.04	32.70	31.88	32.42	+1.09%	2,421,600
2026-02-06	31.43	32.23	31.43	32.07	+2.66%	2,745,900
2026-02-05	30.97	31.40	30.14	31.24	+0.32%	3,445,400
2026-02-04	30.59	31.42	30.59	31.14	+2.30%	3,483,700
2026-02-03	29.74	30.49	29.54	30.44	+2.53%	2,752,600
2026-02-02	29.30	29.96	29.03	29.69	+0.85%	2,396,900
2026-01-30	28.98	29.50	28.92	29.44	+1.38%	2,712,300
2026-01-29	29.18	29.36	28.56	29.04	+0.28%	3,754,900
2026-01-28	28.96	29.34	28.82	28.96	+0.00%	2,595,300
2026-01-27	28.96	29.16	28.72	28.96	+0.31%	3,104,900
2026-01-26	28.91	29.26	28.37	28.87	-0.03%	3,248,300
2026-01-23	30.31	31.11	28.83	28.88	-2.66%	8,058,200
2026-01-22	29.80	30.28	29.53	29.67	-0.10%	4,040,500
2026-01-21	28.61	29.97	28.46	29.70	+4.76%	3,750,800
2026-01-20	28.52	28.84	28.21	28.35	-1.94%	1,834,400
2026-01-16	29.28	29.39	28.85	28.91	-1.16%	1,795,500
2026-01-15	28.55	29.36	28.51	29.25	+2.96%	1,914,100
2026-01-14	28.24	28.62	28.04	28.41	+0.42%	2,320,200
2026-01-13	28.61	28.80	28.22	28.29	-1.12%	2,046,600
2026-01-12	28.74	28.88	28.44	28.61	-1.51%	1,577,200
2026-01-09	29.50	29.72	29.03	29.05	-1.06%	1,469,100
2026-01-08	28.75	29.70	28.50	29.36	+1.59%	1,895,000
2026-01-07	28.95	29.16	28.67	28.90	-0.31%	2,190,400
2026-01-06	28.68	29.09	28.54	28.99	+0.73%	2,531,100
2026-01-05	28.11	29.10	28.06	28.78	+2.09%	2,539,300
2026-01-02	28.05	28.35	27.54	28.19	+0.86%	2,289,600
2025-12-31	28.50	28.50	27.90	27.95	-1.06%	1,452,300
2025-12-30	28.50	28.50	28.15	28.25	-0.67%	1,757,700
2025-12-29	28.43	28.69	28.36	28.44	-0.52%	1,819,500
2025-12-26	28.56	28.72	28.47	28.59	-0.10%	850,900
2025-12-24	28.65	28.72	28.54	28.62	+0.03%	826,100
2025-12-23	29.00	29.07	28.57	28.61	-1.41%	1,997,400
2025-12-22	29.02	29.26	28.89	29.02	+0.59%	2,548,700
2025-12-19	28.86	29.12	28.64	28.85	-0.03%	4,590,100
2025-12-18	29.18	29.26	28.76	28.86	-0.31%	2,615,400
2025-12-17	28.96	29.33	28.82	28.95	+0.14%	2,422,100
2025-12-16	29.14	29.31	28.79	28.91	-0.86%	2,428,100
2025-12-15	29.51	29.61	29.09	29.16	-0.27%	1,885,900
2025-12-12	29.33	29.46	29.05	29.24	-0.07%	2,209,300
2025-12-11	28.96	29.50	28.91	29.26	+0.76%	3,123,500
2025-12-10	27.99	29.35	27.99	29.04	+3.16%	5,330,100
2025-12-09	28.27	28.71	28.10	28.15	-0.53%	2,284,900
2025-12-08	28.18	28.64	28.06	28.30	+0.43%	2,094,700
2025-12-05	28.14	28.38	28.05	28.18	-0.35%	2,411,700
2025-12-04	28.10	28.39	28.03	28.28	+0.39%	1,978,200
2025-12-03	27.72	28.32	27.72	28.17	+1.81%	3,898,700
2025-12-02	28.23	28.25	27.66	27.67	-1.46%	3,013,400
2025-12-01	27.56	28.33	27.51	28.08	+1.30%	2,461,400
2025-11-28	27.93	28.21	27.69	27.72	-2.26%	1,696,900
2025-11-26	28.32	28.59	28.32	28.36	-0.21%	2,030,000
2025-11-25	27.71	28.77	27.69	28.42	+3.20%	2,510,000
2025-11-24	27.26	27.67	26.96	27.54	+1.36%	2,445,900
2025-11-21	26.31	27.47	26.30	27.17	+3.58%	2,602,000
2025-11-20	26.63	27.16	26.15	26.23	-0.53%	2,799,800
2025-11-19	25.93	26.45	25.86	26.37	+2.21%	2,484,400
2025-11-18	25.60	26.06	25.51	25.80	+0.19%	5,318,000
2025-11-17	26.79	26.93	25.64	25.75	-4.38%	3,558,200
2025-11-14	26.71	27.00	26.47	26.93	+0.22%	2,318,000
2025-11-13	26.92	27.37	26.73	26.87	-0.99%	3,151,100
2025-11-12	26.99	27.39	26.91	27.14	+0.89%	3,522,100
2025-11-11	27.08	27.35	26.86	26.90	-0.77%	3,719,500
2025-11-10	27.05	27.41	26.83	27.11	+0.67%	2,573,400
2025-11-07	26.20	26.94	26.03	26.93	+1.93%	2,257,800
2025-11-06	26.52	26.78	26.22	26.42	-0.38%	2,616,600
2025-11-05	26.55	27.14	26.35	26.52	+0.19%	3,959,500
2025-11-04	26.61	26.85	26.25	26.47	-1.67%	3,758,800
2025-11-03	26.55	26.94	26.06	26.92	+0.45%	4,691,900
2025-10-31	25.69	26.97	25.12	26.80	+3.00%	6,117,100
2025-10-30	26.12	26.71	25.97	26.02	-1.25%	4,325,900
2025-10-29	26.74	27.14	26.14	26.35	-1.83%	5,322,600
2025-10-28	25.66	26.87	25.36	26.84	+4.44%	9,004,600
2025-10-27	25.85	25.85	25.50	25.70	+0.63%	4,373,200
2025-10-24	25.29	25.76	25.20	25.54	+2.20%	3,134,300
2025-10-23	25.01	25.28	24.75	24.99	-0.04%	3,109,500
2025-10-22	25.49	25.67	24.97	25.00	-2.23%	3,848,600
2025-10-21	25.19	25.69	25.14	25.57	+0.83%	5,400,500
2025-10-20	24.57	25.51	24.45	25.36	+4.28%	5,881,800
2025-10-17	24.51	24.71	24.07	24.32	+1.04%	8,005,800
2025-10-16	25.97	26.05	23.83	24.07	-7.92%	7,614,900
2025-10-15	26.80	26.88	25.77	26.14	-2.24%	5,581,100
2025-10-14	25.50	26.87	25.48	26.74	+4.01%	5,349,100
2025-10-13	25.37	25.79	25.01	25.71	+3.25%	6,555,500
2025-10-10	26.05	26.68	24.90	24.90	-2.96%	4,985,100
2025-10-09	25.64	25.90	25.32	25.66	+0.08%	5,117,200
2025-10-08	26.20	26.24	25.64	25.64	-2.10%	4,947,200
2025-10-07	26.65	26.92	26.16	26.19	-1.47%	5,899,400
2025-10-06	26.70	27.32	26.40	26.58	+0.64%	7,029,300
2025-10-03	25.96	26.55	25.81	26.41	+1.85%	5,544,100
2025-10-02	25.93	26.11	25.54	25.93	-0.12%	4,104,500
2025-10-01	25.61	25.98	25.53	25.96	+0.85%	6,423,200
2025-09-30	25.69	25.82	25.26	25.74	+0.31%	4,693,200
2025-09-29	26.19	26.20	25.39	25.66	-1.53%	5,370,300
2025-09-26	25.91	26.19	25.67	26.06	+1.01%	4,168,400
2025-09-25	25.88	26.18	25.44	25.80	-1.34%	6,527,600
2025-09-24	26.39	26.63	25.94	26.15	-0.91%	6,015,500
2025-09-23	26.22	26.77	26.21	26.39	+1.15%	3,205,300
2025-09-22	26.42	26.63	26.06	26.09	-1.73%	4,791,500
2025-09-19	26.94	26.97	26.45	26.55	-1.34%	14,335,800
2025-09-18	26.00	26.95	25.82	26.91	+4.22%	4,616,300
2025-09-17	25.46	26.50	25.45	25.82	+1.81%	4,020,900
2025-09-16	25.69	25.99	25.10	25.36	-1.86%	4,500,600
2025-09-15	26.64	26.70	25.73	25.84	-0.84%	4,839,500
2025-09-12	26.24	26.36	25.97	26.06	-0.87%	3,536,500
2025-09-11	26.33	26.65	26.13	26.29	+0.27%	3,877,500
2025-09-10	25.96	26.53	25.91	26.22	+1.00%	4,578,100
2025-09-09	27.01	27.08	25.96	25.96	-3.60%	4,191,400
2025-09-08	27.02	27.15	26.31	26.93	+0.11%	4,821,000
2025-09-05	26.84	27.48	26.63	26.90	+0.49%	7,257,800
2025-09-04	26.67	26.97	26.66	26.77	+0.60%	7,372,700
2025-09-03	26.98	27.06	26.28	26.61	-1.55%	7,614,700
2025-09-02	26.51	27.10	26.27	27.03	+0.97%	14,400,900
2025-08-29	26.74	27.31	26.60	26.77	-1.22%	17,287,600
2025-08-28	27.41	27.41	26.96	27.10	-0.77%	3,830,600
2025-08-27	27.02	27.52	26.98	27.31	+1.11%	5,965,500
2025-08-26	26.75	27.21	26.70	27.01	+0.41%	6,888,300
2025-08-25	26.77	27.04	26.66	26.90	-0.26%	3,268,400
2025-08-22	25.45	27.03	25.41	26.97	+6.52%	4,294,300
2025-08-21	25.50	25.55	25.13	25.32	-1.13%	1,984,500
2025-08-20	25.79	25.85	25.44	25.61	-0.77%	1,919,200
2025-08-19	25.70	26.00	25.61	25.81	+0.16%	2,023,800
2025-08-18	25.50	25.80	25.39	25.77	+0.51%	1,835,900
2025-08-15	26.23	26.39	25.64	25.64	-1.91%	2,926,200
2025-08-14	25.75	26.16	25.50	26.14	+0.04%	2,339,600
2025-08-13	25.40	26.17	25.13	26.13	+3.53%	3,077,800
2025-08-12	24.51	25.27	24.51	25.24	+3.95%	1,830,000
2025-08-11	24.13	24.31	23.95	24.28	+0.87%	1,791,600

Most recent 250 sessions, newest first.

Seasonal returns

Best month historically: Jul (+8.10%). Worst month: Mar (-7.80%). Based on 5 years of daily data (2022–2026).

Jan-2.55%
Feb-4.94%
Mar-7.80%
Apr-0.54%
May-0.94%
Jun+4.11%
Jul+8.10%
Aug+3.18%
Sep-0.98%
Oct+7.80%
Nov+6.82%
Dec-3.00%

FAQ · from the current price data · as of 2026-08-07

Quick answers

What is Columbia Banking System Inc's (COLB) latest close?

31.24 on 2026-08-07, from the Closelook data lake's daily price record.

What is COLB's 52-week high and low?

33.68 high and 23.48 low over the trailing 52 weeks, as of 2026-08-07.

What is Columbia Banking System Inc's strongest and weakest month historically?

Historically, COLB's strongest calendar month has been Jul (average +8.10%) and its weakest Mar (average -7.80%), based on 5 years of daily data (2022–2026).

How many years of seasonality does this cover?

5 years (2022–2026), computed from 965 daily bars in the Closelook data lake.