Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionNbc Securities, Inc.
Latest Disclosed Ownership11,982 shares
Latest Disclosed Value $ 328,666
Nbc Securities, Inc. reports 24.04% increase in ownership of COLB / Columbia Banking System, Inc.

On April 14, 2026 - Nbc Securities, Inc. filed a 13F-HR form disclosing ownership of 11,982 shares of Columbia Banking System, Inc. (US:COLB) valued at $328,666 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 29, 2026 disclosing 9,660 shares of Columbia Banking System, Inc.. This represents a change in shares of 24.04% during the quarter. The current value of the position is $355,386 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-04-14 2026-03-31 13F COLUMBIA BANKING SYSTEMS COMMON STK 197236102 11,982 2,322 24.04 329 21.93 0.0243
2026-01-29 2025-12-31 13F COLUMBIABANKINGSYSTEMSINC COMMONSTK 197236102 9,660 1,763 22.32 270 32.51 0.0202
2025-11-14 2025-09-30 13F COLUMBIA BANKING SYSTEMS COMMON STK 197236102 7,897 -715 -8.30 203 0.0156
2025-07-08 2025-06-30 13F COLUMBIA BANKING SYSTEMS COMMON STK 197236102 8,612 -100 -1.15 0 0.0164
2025-04-09 2025-03-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 8,712 8,704 108,800.00 0 0.0185
2025-01-22 2024-12-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 8 -8,193 -99.90 0 0.0203
2024-10-15 2024-09-30 13F COLUMBIA BKG SYS INC COM Stock 197236102 8,201 -43 -0.52 0 0.0180
2024-07-10 2024-06-30 13F COLUMBIA BKG SYS INC COM Stock 197236102 8,244 1,525 22.70 0 0.0148
2024-04-05 2024-03-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 6,719 74 1.11 0 0.0123
2024-02-07 2023-12-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 6,645 -150 -2.21 0 0.0178
2023-11-03 2023-09-30 13F COLUMBIA BKG SYS INC COM Stock 197236102 6,795 6,795 0 0.0150
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.