Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionNorges Bank
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Norges Bank closes position in COLB / Columbia Banking System, Inc.

On May 11, 2026 - Norges Bank filed a 13F-HR form disclosing ownership of 0 shares of Columbia Banking System, Inc. (US:COLB) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 3,685,594 shares of Columbia Banking System, Inc.. This represents a change in shares of -100.00% during the quarter. The current value of the position is $0 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F COLUMBIA BKG SYS COM 197236102 0 -3,685,594 -100.00 0 -100.00
2026-02-10 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 3,685,594 3,685,594 103,012 0.0110
2025-11-13 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -1,018,534 -100.00 0 -100.00
2025-08-13 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 1,018,534 -1,212,088 -54.34 23,813 -57.19 0.0030
2026-05-11 2025-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,230,622 -185,128 -7.66 55,632 -14.74 0.0078
2025-02-12 2024-12-31 13F COLUMBIA BKG SYS COM 197236102 2,415,750 329,798 15.81 65,249 19.80 0.0086
2025-11-12 2024-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,085,952 -204,171 -8.92 54,464 19.57 0.0076
2024-08-14 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 2,290,123 -1,636 -0.07 45,551 2.72 0.0068
2025-05-14 2024-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,291,759 -75,254 -3.18 44,346 -29.78 0.0070
2024-02-09 2023-12-31 13F COLUMBIA BKG SYS COM 197236102 2,367,013 5,884 0.25 63,152 31.76 0.0110
2024-11-13 2023-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,361,129 16,673 0.71 47,931 0.81 0.0097
2024-08-14 2023-06-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,344,456 72,342 3.18 47,546 -2.31 0.0094
2024-05-15 2023-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 2,272,114 2,230,906 5,413.77 48,669 3,821.68 0.0107
2023-02-14 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 41,208 0 0.00 1,242 4.29 0.0003
2023-11-13 2022-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 41,208 41,208 1,190 0.0003
2022-08-11 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 0 -357,468 -100.00 0 -100.00
2023-05-12 2022-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 357,468 -337,613 -48.57 11,535 -49.28 0.0025
2022-03-09 2021-12-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 695,081 0 0.00 22,743 -13.87 0.0047
2022-11-14 2021-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 695,081 0 0.00 26,406 -1.48 0.0058
2022-08-15 2021-06-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 695,081 -41,717 -5.66 26,802 -15.58 0.0058
2022-05-09 2021-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 736,798 -46,745 -5.97 31,749 12.87 0.0073
2021-03-02 2020-12-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 783,543 50,869 6.94 28,129 60.98 0.0066
2021-11-12 2020-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 732,674 0 0.00 17,474 -15.86 0.0046
2021-08-13 2020-06-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 732,674 0 0.00 20,768 5.76 0.0060
2021-05-07 2020-03-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 732,674 24,956 3.53 19,636 -31.81 0.0070
2020-03-03 2019-12-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 707,718 0 0.00 28,794 10.26 0.0080
2020-11-13 2019-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 707,718 0 0.00 26,115 1.99 0.0080
2020-08-13 2019-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 707,718 80,713 12.87 25,605 24.92 0.0079
2020-05-11 2019-03-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 627,005 0 0.00 20,497 -9.92 0.0066
2019-03-04 2018-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 627,005 77,577 14.12 22,754 6.82 0.0085
2019-12-02 2018-09-30 13F/A-3 COLUMBIA BANKING SYSTEM COM 197236102 549,428 23,917 4.55 21,301 -0.90 0.0069
2019-12-02 2018-09-30 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 549,428 23,917 21,301 0.0069
2019-11-12 2018-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 549,428 23,917 21,301 0.0069
2019-08-12 2018-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 525,511 0 0.00 21,494 -2.50 0.0074
2019-05-15 2018-03-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 525,511 -84,518 -13.85 22,045 -16.81 0.0080
2018-03-05 2017-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 610,029 107,192 21.32 26,500 25.15 0.0095
2018-11-13 2017-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 502,837 137,915 37.79 21,174 45.61 0.0080
2018-07-24 2017-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 364,922 -79,307 -17.85 14,542 -16.04 0.0058
2018-05-11 2017-03-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 444,229 25,309 6.04 17,320 -7.46 0.0071
2017-03-02 2016-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 418,920 20,000 5.01 18,717 50.13 0.0082
2017-11-13 2016-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 398,920 0 0.00 12,467 11.37 0.0059
2017-08-09 2016-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 398,920 22,860 6.08 11,194 -0.52 0.0053
2017-05-10 2016-03-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 376,060 0 0.00 11,252 -7.97 0.0055
2016-04-18 2015-12-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 376,060 22,100 6.24 12,226 10.67 0.0061
2016-03-16 2015-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 376,060 0 12,226 0.0061
2016-11-14 2015-09-30 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 353,960 0 0.00 11,047 -4.09 0.0058
2016-08-12 2015-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 353,960 0 0.00 11,518 12.33 0.0058
2016-05-13 2015-03-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 353,960 -13,707 -3.73 10,254 1.01 0.0050
2015-03-19 2014-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 367,667 -28,250 10,151 0.0052
2016-04-18 2014-12-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 367,667 -28,250 -7.14 10,151 3.35 0.0052
2015-11-12 2014-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 395,917 -121,052 -23.42 9,822 -27.79 0.0053
2015-08-10 2014-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 0.00 13,602 -7.75 0.0073
2015-05-12 2014-03-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 0.00 14,744 3.67 0.0083
2014-03-07 2013-12-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 14,222 0.0087
2014-03-20 2013-12-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 14,222 0.0084
2014-05-12 2013-12-31 13F/A-3 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 0.00 14,222 11.38 0.0082
2014-11-14 2013-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 516,969 0 0.00 12,769 3.74 0.0075
2014-08-14 2013-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 516,969 179,535 53.21 12,309 65.96 0.0076
2014-04-04 2013-03-31 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 337,434 0 7,417 0.0049
2014-05-12 2013-03-31 13F/A-2 COLUMBIA BANKING SYSTEM COM 197236102 337,434 0 0.00 7,417 18.56 0.0048
2013-11-14 2012-09-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 337,434 0 0.00 6,256 2.71 0.0042
2013-08-15 2012-06-30 13F/A-1 COLUMBIA BANKING SYSTEM COM 197236102 337,434 337,434 6,091 0.0049
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.