Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionNeuberger Berman Group LLC
Latest Disclosed Ownership43,266 shares
Latest Disclosed Value $ 1,186,786
Neuberger Berman Group LLC reports 4.31% decrease in ownership of COLB / Columbia Banking System, Inc.

On May 14, 2026 - Neuberger Berman Group LLC filed a 13F-HR form disclosing ownership of 43,266 shares of Columbia Banking System, Inc. (US:COLB) valued at $1,186,786 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 45,217 shares of Columbia Banking System, Inc.. This represents a change in shares of -4.31% during the quarter. The current value of the position is $1,283,270 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)
2026-05-14 2026-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 43,266 -1,951 -4.31 1,187 -6.10 0.0005
2026-02-13 2025-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 45,217 1,664 3.82 1,264 12.67 0.0009
2025-11-12 2025-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 43,553 8,020 22.57 1,121 35.06 0.0008
2025-08-25 2025-06-30 13F/A-1 COLUMBIA BANKING SYSTEM Common 197236102 35,533 1,357 3.97 831 -2.58 0.0006
2025-08-13 2025-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 35,533 1,357 831 0.0003
2025-05-13 2025-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 34,176 4,124 13.72 852 5.06 0.0007
2025-02-13 2024-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 30,052 0 0.00 812 3.44 0.0006
2024-11-14 2024-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 30,052 -309 -1.02 785 30.02 0.0006
2024-11-14 2024-06-30 13F/A-1 COLUMBIA BANKING SYSTEM Common 197236102 30,361 9,901 48.39 604 52.66 0.0005
2024-08-13 2024-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 30,361 9,901 604 0.0005
2024-11-14 2024-03-31 13F/A-1 COLUMBIA BANKING SYSTEM Common 197236102 20,460 2,089 11.37 396 -19.39 0.0003
2024-05-13 2024-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 20,460 2,089 396 0.0003
2024-11-14 2023-12-31 13F/A-2 COLUMBIA BANKING SYSTEM Common 197236102 18,371 8,134 79.46 490 136.71 0.0004
2024-02-09 2023-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 18,371 8,134 490 0.0004
2023-11-14 2023-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 10,237 299 3.01 208 2.99 0.0002
2023-08-11 2023-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 9,938 9,938 202 0.0002
2023-02-13 2022-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 0 -454,986 -100.00 0 -100.00
2022-11-15 2022-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 454,986 -1,024,550 -69.25 13,145 -68.99 0.0137
2022-08-15 2022-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 1,479,536 -809,069 -35.35 42,389 -42.60 0.0426
2022-05-23 2022-03-31 13F/A-1 COLUMBIA BANKING SYSTEM Common 197236102 2,288,605 -396,519 -14.77 73,854 -15.90 0.0626
2022-05-13 2022-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 2,288,605 -396,519 73,815 0.0329
2022-02-11 2021-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 2,685,124 -329,232 -10.92 87,815 -23.29 0.0689
2021-11-12 2021-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 3,014,356 -47,045 -1.54 114,481 -3.02 0.1001
2021-08-13 2021-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 3,061,401 -102,594 -3.24 118,048 -13.41 0.1030
2021-05-13 2021-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 3,163,995 686,986 27.73 136,337 53.32 0.1302
2021-02-10 2020-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 2,477,009 -73,045 -2.86 88,925 46.21 0.0922
2020-11-12 2020-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 2,550,054 -67,243 -2.57 60,819 -18.02 0.0721
2020-08-13 2020-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 2,617,297 -590,812 -18.42 74,187 -13.71 0.0922
2020-05-14 2020-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 3,208,109 -45,000 -1.38 85,977 -35.04 0.1311
2020-02-12 2019-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 3,253,109 -98,005 -2.92 132,353 7.03 0.1545
2019-11-13 2019-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 3,351,114 -66,670 -1.95 123,656 0.00 0.1510
2019-08-13 2019-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 3,417,784 136,824 4.17 123,655 15.29 0.1479
2019-05-13 2019-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 3,280,960 234,635 7.70 107,255 -2.98 0.1314
2019-02-12 2018-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 3,046,325 287,920 10.44 110,551 3.37 0.1541
2018-11-16 2018-09-30 13F/A-1 COLUMBIA BANKING SYSTEM Common 197236102 2,758,405 -102,174 -3.57 106,943 -8.59 0.1212
2018-11-13 2018-09-30 13F COLUMBIA BANKING SYSTEM Common 197236102 2,758,405 -102,174 106,943
2018-08-13 2018-06-30 13F COLUMBIA BANKING SYSTEM Common 197236102 2,860,579 111,480 4.06 116,998 1.45 0.1292
2018-05-08 2018-03-31 13F COLUMBIA BANKING SYSTEM Common 197236102 2,749,099 159,017 6.14 115,325 2.50 0.1318
2018-02-14 2017-12-31 13F COLUMBIA BANKING SYSTEM Common 197236102 2,590,082 625,118 31.81 112,513 35.98 0.1293
2017-11-15 2017-09-30 13F COLUMBIA BANKING SYSTEMS COMMON STOCK 197236102 1,964,964 80,731 4.28 82,745 10.20 0.1035
2017-08-08 2017-06-30 13F COLUMBIA BANKING SYSTEMS COMMON STOCK 197236102 1,884,233 581,814 44.67 75,087 47.86 0.0964
2017-05-10 2017-03-31 13F COLUMBIA BANKING SYSTEMS COMMON STOCK 197236102 1,302,419 681,910 109.90 50,781 83.17 0.0655
2017-02-06 2016-12-31 13F COLUMBIA BANKING SYSTEMS COMMON STOCK 197236102 620,509 613,809 9,161.33 27,724 12,559.36 0.0372
2016-11-02 2016-09-30 13F COLUMBIA BANKING SYSTEMS COMMON STOCK 197236102 6,700 6,700 219 0.0003
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.