Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionAdvisory Services Network, LLC
Latest Disclosed Ownership3,659 shares
Latest Disclosed Value $ 100,367
Advisory Services Network, LLC ownership in COLB / Columbia Banking System, Inc.

On May 15, 2026 - Advisory Services Network, LLC filed a 13F-HR form disclosing ownership of 3,659 shares of Columbia Banking System, Inc. (US:COLB) valued at $100,366 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Columbia Banking System, Inc.. The current value of the position is $107,940 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)
2026-05-15 2026-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 3,659 3,659 100 0.0009
2026-02-17 2025-12-31 13F COLUMBIA BKG SYS Stock 197236102 0 -457 -100.00 0 -100.00
2025-11-18 2025-09-30 13F COLUMBIA BKG SYS Stock 197236102 457 457 12 0.0002
2024-05-06 2024-03-31 13F COLUMBIA BKG SYS Stock 197236102 0 -35 -100.00 0 0.0000
2024-02-09 2023-12-31 13F COLUMBIA BKG SYS Stock 197236102 35 35 1 0.0000
2023-05-17 2023-03-31 13F COLUMBIA BKG SYS Stock 197236102 0 -19 -100.00 0 0.0000
2023-02-13 2022-12-31 13F COLUMBIA BKG SYS Stock 197236102 19 19 1 0.0000
2021-11-05 2021-09-30 13F COLUMBIA BKG SYS Stock 197236102 0 -209 -100.00 0 -100.00
2021-08-12 2021-06-30 13F COLUMBIA BKG SYS Stock 197236102 209 209 8 0.0003
2021-05-24 2021-03-31 13F COLUMBIA BKG SYS Stock 197236102 0 -209 -100.00 0 -100.00
2021-02-09 2020-12-31 13F COLUMBIA BKG SYS Stock 197236102 209 9 4.50 7 40.00 0.0003
2020-11-16 2020-09-30 13F COLUMBIA BKG SYS Stock 197236102 200 200 -4.31 5 -28.57 0.0002
2020-08-10 2020-06-30 13F COLUMBIA BKG SYS Stock 197236102 0 -200 -100.00 0 -100.00
2020-05-15 2020-03-31 13F COLUMBIA BKG SYS Stock 197236102 200 -145 -42.03 5 -64.29 0.0003
2020-02-04 2019-12-31 13F COLUMBIA BKG SYS Stock 197236102 345 244 241.58 14 250.00 0.0007
2019-11-04 2019-09-30 13F COLUMBIA BKG SYS Stock 197236102 101 0 0.00 4 0.00 0.0002
2019-08-01 2019-06-30 13F COLUMBIA BKG SYS Stock 197236102 101 -99 -49.50 4 -20.00 0.0002
2014-02-13 2013-12-31 13F COLUMBIA BKG SYS Stock 197236102 200 200 5 0.0025
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.