Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionRiverview Trust Co
Latest Disclosed Ownership96 shares
Latest Disclosed Value $ 2,633
Riverview Trust Co reports 75.00% decrease in ownership of COLB / Columbia Banking System, Inc.

On May 1, 2026 - Riverview Trust Co filed a 13F-HR form disclosing ownership of 96 shares of Columbia Banking System, Inc. (US:COLB) valued at $2,633 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 384 shares of Columbia Banking System, Inc.. This represents a change in shares of -75.00% during the quarter. The current value of the position is $2,745 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)
2026-05-01 2026-03-31 13F Columbia Bkg Sys Com 197236102 96 -288 -75.00 3 -80.00 0.0023
2026-01-26 2025-12-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 11 11.11 0.0129
2025-10-22 2025-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 10 12.50 0.0119
2025-07-21 2025-06-30 13F Columbia Bkg Sys Com 197236102 384 -869 -69.35 9 -74.19 0.0112
2025-04-11 2025-03-31 13F Columbia Bkg Sys Com 197236102 1,253 0 0.00 31 -6.06 0.0308
2025-02-06 2024-12-31 13F Columbia Bkg Sys Com 197236102 1,253 0 0.00 34 3.13 0.0308
2024-10-18 2024-09-30 13F Columbia Bkg Sys Com 197236102 1,253 0 0.00 33 33.33 0.0287
2024-07-16 2024-06-30 13F Columbia Bkg Sys Com 197236102 1,253 0 0.00 25 0.00 0.0236
2024-04-12 2024-03-31 13F Columbia Bkg Sys Com 197236102 1,253 1,253 24 0.0187
2024-01-24 2023-12-31 13F Columbia Bkg Sys Com 197236102 0 -384 -100.00 0 -100.00
2023-10-17 2023-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 8 0.00 0.0069
2023-07-18 2023-06-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 8 -12.50 0.0071
2023-04-20 2023-03-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 8 0.0076
2023-01-26 2022-12-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 0 -100.00 0.0114
2022-10-27 2022-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 11 0.00 0.0106
2022-07-27 2022-06-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 11 -8.33 0.0096
2022-04-21 2022-03-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 12 -7.69 0.0089
2022-01-19 2021-12-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 13 -13.33 0.0076
2021-10-14 2021-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 15 0.00 0.0159
2021-07-16 2021-06-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 15 -11.76 0.0159
2021-04-19 2021-03-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 17 21.43 0.0190
2021-01-22 2020-12-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 14 55.56 0.0155
2020-10-15 2020-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 9 -18.18 0.0103
2020-07-08 2020-06-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 11 10.00 0.0107
2020-04-15 2020-03-31 13F/A-1 Columbia Bkg Sys Com 197236102 384 0 0.00 10 -37.50 0.0096
2020-04-15 2020-03-31 13F Columbia Bkg Sys Com 197236102 384 0 16 8,536.2470
2020-01-10 2019-12-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 16 14.29 0.0108
2019-10-16 2019-09-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 14 0.00 0.0097
2019-07-12 2019-06-30 13F Columbia Bkg Sys Com 197236102 384 0 0.00 14 7.69 0.0098
2019-04-10 2019-03-31 13F Columbia Bkg Sys Com 197236102 384 0 0.00 13 -7.14 0.0098
2019-02-11 2018-12-31 13F Columbia Bkg Sys COM 197236102 384 384 14 0.0110
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.