Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership218,454 shares
Latest Disclosed Value $ 5,992,193
Citigroup Inc reports 21.78% decrease in ownership of COLB / Columbia Banking System, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 218,454 shares of Columbia Banking System, Inc. (US:COLB) valued at $5,992,193 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 279,266 shares of Columbia Banking System, Inc.. This represents a change in shares of -21.78% during the quarter. The current value of the position is $6,245,600 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 218,454 -60,812 -21.78 5,992 -23.23 0.0013
2026-02-13 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 279,266 -31,575 -10.16 7,805 -2.45 0.0034
2025-11-10 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 310,841 62,432 25.13 8,001 37.78 0.0036
2025-08-11 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 248,409 57,803 30.33 5,808 22.18 0.0029
2025-05-12 2025-03-31 13F COLUMBIA BKG SYS COM 197236102 190,606 -63,665 -25.04 4,754 -30.78 0.0024
2025-02-12 2024-12-31 13F COLUMBIA BKG SYS COM 197236102 254,271 -26,311 -9.38 6,868 -6.25 0.0041
2024-11-12 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 280,582 -164,477 -36.96 7,326 -17.25 0.0042
2024-08-12 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 445,059 52,784 13.46 8,852 16.63 0.0057
2024-05-10 2024-03-31 13F COLUMBIA BKG SYS COM 197236102 392,275 168,187 75.05 7,591 26.97 0.0050
2024-02-09 2023-12-31 13F COLUMBIA BKG SYS COM 197236102 224,088 94,271 72.62 5,979 126.87 0.0042
2023-12-06 2023-09-30 13F/A-1 COLUMBIA BKG SYS COM 197236102 129,817 -86,008 -39.85 2,635 -39.79 0.0020
2023-11-09 2023-09-30 13F COLUMBIA BKG SYS COM 197236102 129,817 -86,008 2,635 0.0008
2023-08-10 2023-06-30 13F COLUMBIA BKG SYS COM 197236102 215,825 180,775 515.76 4,377 483.47 0.0029
2023-05-11 2023-03-31 13F COLUMBIA BKG SYS COM 197236102 35,050 -15,170 -30.21 751 -50.43 0.0005
2023-02-09 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 50,220 -74,984 -59.89 1,513 -58.17 0.0012
2022-11-10 2022-09-30 13F COLUMBIA BKG SYS COM 197236102 125,204 2,019 1.64 3,617 2.49 0.0026
2022-08-10 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 123,185 15,455 14.35 3,529 1.50 0.0026
2022-05-12 2022-03-31 13F COLUMBIA BKG SYS COM 197236102 107,730 -7,267 -6.32 3,477 -7.60 0.0021
2022-02-10 2021-12-31 13F COLUMBIA BKG SYS COM 197236102 114,997 37,653 48.68 3,763 28.08 0.0020
2021-11-10 2021-09-30 13F COLUMBIA BKG SYS COM 197236102 77,344 -7,938 -9.31 2,938 -10.64 0.0017
2021-08-10 2021-06-30 13F COLUMBIA BKG SYS COM 197236102 85,282 38,866 83.73 3,288 64.40 0.0020
2021-05-13 2021-03-31 13F COLUMBIA BKG SYS COM 197236102 46,416 26,181 129.38 2,000 175.48 0.0013
2021-02-11 2020-12-31 13F COLUMBIA BKG SYS COM 197236102 20,235 11,169 123.20 726 236.11 0.0004
2020-11-12 2020-09-30 13F COLUMBIA BKG SYS COM 197236102 9,066 -30,720 -77.21 216 -80.85 0.0001
2020-08-12 2020-06-30 13F COLUMBIA BKG SYS COM 197236102 39,786 18,397 86.01 1,128 96.86 0.0009
2020-05-12 2020-03-31 13F COLUMBIA BKG SYS COM 197236102 21,389 -12,905 -37.63 573 -58.92 0.0005
2020-02-12 2019-12-31 13F COLUMBIA BKG SYS COM 197236102 34,294 -20,018 -36.86 1,395 -30.39 0.0010
2019-11-08 2019-09-30 13F COLUMBIA BKG SYS COM 197236102 54,312 -3,213 -5.59 2,004 -3.75 0.0016
2019-08-12 2019-06-30 13F COLUMBIA BKG SYS COM 197236102 57,525 48,746 555.26 2,082 625.44 0.0017
2019-05-13 2019-03-31 13F COLUMBIA BKG SYS COM 197236102 8,779 84 0.97 287 -9.18 0.0003
2019-02-12 2018-12-31 13F COLUMBIA BKG SYS COM 197236102 8,695 8,229 1,765.88 316 1,655.56 0.0003
2018-11-13 2018-09-30 13F COLUMBIA BKG SYS COM 197236102 466 35 8.12 18 0.00 0.0000
2018-08-10 2018-06-30 13F COLUMBIA BKG SYS COM 197236102 431 -7,485 -94.56 18 -94.56 0.0000
2018-05-11 2018-03-31 13F COLUMBIA BKG SYS COM 197236102 7,916 5,346 208.02 331 198.20 0.0003
2018-02-12 2017-12-31 13F COLUMBIA BKG SYS COM 197236102 2,570 -13,434 -83.94 111 -83.53 0.0001
2017-11-13 2017-09-30 13F COLUMBIA BKG SYS COM 197236102 16,004 -37,840 -70.28 674 -68.58 0.0006
2017-08-11 2017-06-30 13F COLUMBIA BKG SYS COM 197236102 53,844 -4,355 -7.48 2,145 -5.46 0.0019
2017-05-12 2017-03-31 13F COLUMBIA BKG SYS COM 197236102 58,199 -52,350 -47.35 2,269 -54.05 0.0020
2017-02-10 2016-12-31 13F COLUMBIA BKG SYS COM 197236102 110,549 70,615 176.83 4,938 277.81 0.0044
2016-11-10 2016-09-30 13F COLUMBIA BKG SYS COM 197236102 39,934 10,683 36.52 1,307 59.20 0.0012
2016-08-12 2016-06-30 13F COLUMBIA BKG SYS COM 197236102 29,251 -30,173 -50.78 821 -53.82 0.0008
2016-05-13 2016-03-31 13F COLUMBIA BKG SYS COM 197236102 59,424 20,769 53.73 1,778 41.34 0.0020
2016-02-12 2015-12-31 13F COLUMBIA BKG SYS COM 197236102 38,655 -9,264 -19.33 1,258 -15.85 0.0013
2015-11-13 2015-09-30 13F COLUMBIA BKG SYS COM 197236102 47,919 35,620 289.62 1,495 273.75 0.0014
2015-08-13 2015-06-30 13F COLUMBIA BKG SYS COM 197236102 12,299 2,694 28.05 400 43.88 0.0004
2015-05-14 2015-03-31 13F COLUMBIA BKG SYS COM 197236102 9,605 -17,288 -64.28 278 -62.53 0.0003
2015-02-17 2014-12-31 13F COLUMBIA BKG SYS COM 197236102 26,893 12,881 91.93 742 113.22 0.0007
2014-11-14 2014-09-30 13F COLUMBIA BKG SYS COM 197236102 14,012 12,084 626.76 348 582.35 0.0003
2014-08-14 2014-06-30 13F COLUMBIA BKG SYS COM 197236102 1,928 -11,661 -85.81 51 -86.86 0.0000
2014-05-15 2014-03-31 13F COLUMBIA BKG SYS COM 197236102 13,589 -7,072 -34.23 388 -31.69 0.0004
2014-02-14 2013-12-31 13F COLUMBIA BKG SYS COM 197236102 20,661 10,600 105.36 568 128.11 0.0005
2013-11-14 2013-09-30 13F COLUMBIA BKG SYS COM 197236102 10,061 -27,269 -73.05 249 -71.99 0.0002
2013-08-14 2013-06-30 13F COLUMBIA BKG SYS COM 197236102 37,330 37,330 889 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.