Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionTd Asset Management Inc
Latest Disclosed Ownership477,767 shares
Latest Disclosed Value $ 13,105,149
Td Asset Management Inc reports 3.43% increase in ownership of COLB / Columbia Banking System, Inc.

On May 11, 2026 - Td Asset Management Inc filed a 13F-HR form disclosing ownership of 477,767 shares of Columbia Banking System, Inc. (US:COLB) valued at $13,105,149 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 461,928 shares of Columbia Banking System, Inc.. This represents a change in shares of 3.43% during the quarter. The current value of the position is $14,170,569 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)
2026-05-11 2026-03-31 13F COLUMBIA BKG SYS COM 197236102 477,767 15,839 3.43 13,105 1.51 0.0057
2026-02-10 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 461,928 49,454 11.99 12,911 21.60 0.0104
2025-11-10 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 412,474 16,914 4.28 10,617 14.80 0.0086
2025-07-28 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 395,560 -12,139 -2.98 9,248 -9.05 0.0079
2025-05-07 2025-03-31 13F COLUMBIA BKG SYS COM 197236102 407,699 -23,793 -5.51 10,168 -12.75 0.0094
2025-02-11 2024-12-31 13F COLUMBIA BKG SYS COM 197236102 431,492 40,161 10.26 11,655 14.73 0.0103
2024-11-01 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 391,331 81,627 26.36 10,159 64.90 0.0090
2024-08-02 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 309,704 -6,535 -2.07 6,160 0.67 0.0057
2024-05-08 2024-03-31 13F COLUMBIA BKG SYS COM 197236102 316,239 21,564 7.32 6,119 -22.16 0.0057
2024-02-12 2023-12-31 13F COLUMBIA BKG SYS COM 197236102 294,675 4,661 1.61 7,862 33.53 0.0077
2023-10-27 2023-09-30 13F COLUMBIA BKG SYS COM 197236102 290,014 -16,907 -5.51 5,887 -5.41 0.0071
2023-08-09 2023-06-30 13F COLUMBIA BKG SYS COM 197236102 306,921 21,960 7.71 6,224 1.98 0.0071
2023-05-10 2023-03-31 13F COLUMBIA BKG SYS COM 197236102 284,961 77,241 37.19 6,104 -2.48 0.0074
2023-02-07 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 207,720 25,485 13.98 6,259 18.55 0.0077
2022-11-07 2022-09-30 13F COLUMBIA BKG SYS COM 197236102 182,235 145,187 391.89 5,279 397.55 0.0066
2022-08-04 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 37,048 37,048 1,061 0.0012
2021-08-11 2021-06-30 13F COLUMBIA BKG SYS COM 197236102 0 -21,717 -100.00 0 -100.00
2021-05-14 2021-03-31 13F COLUMBIA BKG SYS COM 197236102 21,717 -6,300 -22.49 936 -6.96 0.0010
2021-02-16 2020-12-31 13F COLUMBIA BKG SYS COM 197236102 28,017 1,700 6.46 1,006 60.19 0.0012
2020-11-10 2020-09-30 13F COLUMBIA BKG SYS COM 197236102 26,317 0 0.00 628 -15.82 0.0009
2020-08-13 2020-06-30 13F COLUMBIA BKG SYS COM 197236102 26,317 2,800 11.91 746 18.41 0.0011
2020-05-15 2020-03-31 13F COLUMBIA BKG SYS COM 197236102 23,517 0 0.00 630 -34.17 0.0011
2020-02-11 2019-12-31 13F COLUMBIA BKG SYS COM 197236102 23,517 0 0.00 957 10.25 0.0014
2019-11-07 2019-09-30 13F COLUMBIA BKG SYS COM 197236102 23,517 1,200 5.38 868 7.56 0.0013
2019-08-01 2019-06-30 13F COLUMBIA BKG SYS COM 197236102 22,317 0 0.00 807 10.55 0.0012
2019-05-08 2019-03-31 13F COLUMBIA BKG SYS COM 197236102 22,317 -3,200 -12.54 730 -21.17 0.0011
2019-02-01 2018-12-31 13F COLUMBIA BKG SYS COM 197236102 25,517 -2,000 -7.27 926 -13.21 0.0016
2018-11-01 2018-09-30 13F COLUMBIA BKG SYS COM 197236102 27,517 4,900 21.67 1,067 15.35 0.0016
2018-07-31 2018-06-30 13F COLUMBIA BKG SYS COM 197236102 22,617 1,200 5.60 925 3.01 0.0014
2018-05-11 2018-03-31 13F COLUMBIA BKG SYS COM 197236102 21,417 7,200 50.64 898 45.31 0.0014
2018-02-02 2017-12-31 13F COLUMBIA BKG SYS COM 197236102 14,217 14,217 618 0.0009
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.