Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionStifel Financial Corp
Latest Disclosed Ownership588,356 shares
Latest Disclosed Value $ 16,138,683
Stifel Financial Corp reports 415.98% increase in ownership of COLB / Columbia Banking System, Inc.

On May 12, 2026 - Stifel Financial Corp filed a 13F-HR form disclosing ownership of 588,356 shares of Columbia Banking System, Inc. (US:COLB) valued at $16,138,605 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 114,026 shares of Columbia Banking System, Inc.. This represents a change in shares of 415.98% during the quarter. The current value of the position is $17,356,502 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)
2026-05-12 2026-03-31 13F COLUMBIA BKG SYS COM 197236102 588,356 474,330 415.98 16,139 406.37 0.0035
2026-02-13 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 114,026 71,913 170.76 3,187 194.28 0.0029
2025-11-12 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 42,113 -17,468 -29.32 1,084 -22.25 0.0010
2025-08-14 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 59,581 4,814 8.79 1,393 2.05 0.0014
2025-05-14 2025-03-31 13F COLUMBIA BKG SYS COM 197236102 54,767 1,031 1.92 1,366 -5.93 0.0015
2025-02-13 2024-12-31 13F COLUMBIA BKG SYS COM 197236102 53,736 -69,178 -56.28 1,451 -54.78 0.0015
2024-11-14 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 122,914 -32,328 -20.82 3,209 3.95 0.0034
2024-08-13 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 155,242 -34,661 -18.25 3,088 -15.98 0.0035
2024-05-14 2024-03-31 13F COLUMBIA BKG SYS COM 197236102 189,903 -107,772 -36.20 3,675 -53.73 0.0042
2024-02-12 2023-12-31 13F COLUMBIA BKG SYS COM 197236102 297,675 59,848 25.16 7,942 64.51 0.0100
2023-11-13 2023-09-30 13F COLUMBIA BKG SYS COM 197236102 237,827 97,307 69.25 4,828 69.43 0.0068
2023-08-14 2023-06-30 13F COLUMBIA BKG SYS COM 197236102 140,520 50,490 56.08 2,850 47.77 0.0039
2023-05-12 2023-03-31 13F COLUMBIA BKG SYS COM 197236102 90,030 7,263 8.78 1,928 -22.66 0.0028
2023-02-13 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 82,767 552 0.67 2,494 4.97 0.0037
2022-11-14 2022-09-30 13F COLUMBIA BKG SYS COM 197236102 82,215 -3,205 -3.75 2,375 -2.94 0.0039
2022-08-15 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 85,420 -784 -0.91 2,447 -12.04 0.0038
2022-05-13 2022-03-31 13F COLUMBIA BKG SYS COM 197236102 86,204 -5,128 -5.61 2,782 -6.89 0.0038
2022-02-14 2021-12-31 13F COLUMBIA BKG SYS COM 197236102 91,332 8,980 10.90 2,988 -4.51 0.0039
2021-11-15 2021-09-30 13F COLUMBIA BKG SYS COM 197236102 82,352 -1,331 -1.59 3,129 -3.04 0.0046
2021-08-13 2021-06-30 13F COLUMBIA BKG SYS COM 197236102 83,683 2,624 3.24 3,227 -7.62 0.0048
2021-05-14 2021-03-31 13F COLUMBIA BKG SYS COM 197236102 81,059 -41,804 -34.02 3,493 -20.81 0.0058
2021-02-12 2020-12-31 13F COLUMBIA BKG SYS COM 197236102 122,863 -29,950 -19.60 4,411 21.05 0.0079
2020-11-16 2020-09-30 13F COLUMBIA BKG SYS COM 197236102 152,813 68,379 80.99 3,644 52.28 0.0075
2020-08-14 2020-06-30 13F COLUMBIA BKG SYS COM 197236102 84,434 -743 -0.87 2,393 4.82 0.0055
2020-05-14 2020-03-31 13F COLUMBIA BKG SYS COM 197236102 85,177 32 0.04 2,283 -34.09 0.0063
2020-02-13 2019-12-31 13F COLUMBIA BKG SYS COM 197236102 85,145 -9,936 -10.45 3,464 -1.23 0.0072
2019-11-19 2019-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 95,081 -27,351 -22.34 3,507 -20.78 0.0089
2019-11-13 2019-09-30 13F COLUMBIA BKG SYS COM 197236102 95,081 -27,351 3,507 1,965.8493
2019-08-14 2019-06-30 13F COLUMBIA BKG SYS COM 197236102 122,432 675 0.55 4,427 11.18 0.0114
2019-05-14 2019-03-31 13F COLUMBIA BKG SYS COM 197236102 121,757 -15,026 -10.99 3,982 -19.77 0.0113
2019-02-13 2018-12-31 13F COLUMBIA BKG SYS COM 197236102 136,783 -20,104 -12.81 4,963 -18.40 0.0160
2018-11-13 2018-09-30 13F COLUMBIA BKG SYS COM 197236102 156,887 -10,135 -6.07 6,082 -10.95 0.0174
2018-08-14 2018-06-30 13F COLUMBIA BKG SYS COM 197236102 167,022 50 0.03 6,830 -2.50 0.0210
2018-05-11 2018-03-31 13F COLUMBIA BKG SYS COM 197236102 166,972 -114 -0.07 7,005 -3.51 0.0221
2018-02-14 2017-12-31 13F COLUMBIA BKG SYS COM 197236102 167,086 88,689 113.13 7,260 119.93 0.0230
2017-11-13 2017-09-30 13F COLUMBIA BKG SYS COM 197236102 78,397 315 0.40 3,301 6.07 0.0115
2017-08-14 2017-06-30 13F COLUMBIA BKG SYS COM 197236102 78,082 -80 -0.10 3,112 2.13 0.0116
2017-05-10 2017-03-31 13F COLUMBIA BKG SYS COM 197236102 78,162 264 0.34 3,047 -12.42 0.0118
2017-02-16 2016-12-31 13F COLUMBIA BKG SYS COM 197236102 77,898 -10 -0.01 3,479 36.43 0.0148
2016-11-15 2016-09-30 13F COLUMBIA BKG SYS COM 197236102 77,908 -275 -0.35 2,550 16.23 0.0115
2016-08-17 2016-06-30 13F COLUMBIA BKG SYS COM 197236102 78,183 124 0.16 2,194 -6.08 0.0101
2016-05-16 2016-03-31 13F COLUMBIA BKG SYS COM 197236102 78,059 -1,437 -1.81 2,336 -9.60 0.0124
2016-03-21 2015-12-31 13F/A-2 COLUMBIA BKG SYS COM 197236102 79,496 2,448 3.18 2,584 7.44 0.0135
2016-02-26 2015-12-31 13F/A-1 COLUMBIA BKG SYS COM 197236102 79,496 0 2,584 0.0135
2016-02-16 2015-12-31 13F COLUMBIA BKG SYS COM 197236102 78,746 2,560
2015-11-16 2015-09-30 13F COLUMBIA BKG SYS COM 197236102 77,048 0 0.00 2,405 -4.11 0.0135
2015-08-17 2015-06-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 77,048 1,333 1.76 2,508 14.31 0.0130
2015-08-17 2015-06-30 13F COLUMBIA BKG SYS COM 197236102 77,048 2,508
2015-05-14 2015-03-31 13F COLUMBIA BKG SYS COM 197236102 75,715 0 0.00 2,194 4.93 0.0120
2015-02-13 2014-12-31 13F COLUMBIA BKG SYS COM 197236102 75,715 65,438 636.74 2,091 720.00 0.0116
2014-11-13 2014-09-30 13F COLUMBIA BKG SYS COM 197236102 10,277 -3,697 -26.46 255 -30.52 0.0022
2014-08-14 2014-06-30 13F COLUMBIA BKG SYS COM 197236102 13,974 6,534 87.82 367 73.11 0.0033
2014-05-15 2014-03-31 13F COLUMBIA BKG SYS COM 197236102 7,440 7,440 212 0.0020
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.