Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionSavant Capital, LLC
Latest Disclosed Ownership23,567 shares
Latest Disclosed Value $ 646,454
Savant Capital, LLC reports 20.87% increase in ownership of COLB / Columbia Banking System, Inc.

On May 4, 2026 - Savant Capital, LLC filed a 13F-HR form disclosing ownership of 23,567 shares of Columbia Banking System, Inc. (US:COLB) valued at $646,443 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 19,498 shares of Columbia Banking System, Inc.. This represents a change in shares of 20.87% during the quarter. The current value of the position is $673,781 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)
2026-05-04 2026-03-31 13F COLUMBIA BKG SYS COM 197236102 23,567 4,069 20.87 646 18.75 0.0031
2026-02-10 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 19,498 4,069 26.37 545 37.03 0.0031
2026-03-04 2025-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 15,429 -23,268 -60.13 397 -56.08 0.0024
2025-11-05 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 69,234 30,537 1,782 0.0094
2025-08-06 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 38,697 23,652 157.21 905 141.07 0.0056
2025-05-08 2025-03-31 13F COLUMBIA BKG SYS COM 197236102 15,045 -1,000 -6.23 375 -13.39 0.0027
2025-01-29 2024-12-31 13F COLUMBIA BKG SYS COM 197236102 16,045 919 6.08 433 9.90 0.0034
2024-11-04 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 15,126 1,642 12.18 395 47.01 0.0033
2024-08-05 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 13,484 13,484 268 0.0027
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.