Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership96,123 shares
Latest Disclosed Value $ 2,636,654
Man Group plc reports 6.89% increase in ownership of COLB / Columbia Banking System, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 96,123 shares of Columbia Banking System, Inc. (US:COLB) valued at $2,636,654 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 89,928 shares of Columbia Banking System, Inc.. This represents a change in shares of 6.89% during the quarter. The current value of the position is $2,748,157 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 BKG SYS COM 197236102 96,123 6,195 6.89 2,637 4.89 0.0048
2026-02-17 2025-12-31 13F COLUMBIA BKG SYS COM 197236102 89,928 11,094 14.07 2,513 23.85 0.0043
2025-11-14 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 78,834 78,834 2,029 0.0035
2024-11-14 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -88,254 -100.00 0 -100.00
2024-08-14 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 88,254 88,254 1,755 0.0044
2023-11-14 2023-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -32,716 -100.00 0 -100.00
2023-08-14 2023-06-30 13F COLUMBIA BKG SYS COM 197236102 32,716 663 -42.25 0.0020
2023-05-15 2023-03-31 13F COLUMBIA BKG SYS COM 197236102 1,149 -59.61 0.0041
2023-02-14 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 94,332 -46,897 -33.21 2,842 -30.34 0.0102
2022-11-14 2022-09-30 13F COLUMBIA BKG SYS COM 197236102 141,229 4,080 -58.38 0.0189
2022-08-15 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 9,804 -24.33 0.0415
2022-05-16 2022-03-31 13F COLUMBIA BKG SYS COM 197236102 401,492 11,444 2.93 12,956 1.52 0.0451
2022-02-14 2021-12-31 13F COLUMBIA BKG SYS COM 197236102 390,048 116,430 42.55 12,762 22.77 0.0410
2021-11-15 2021-09-30 13F COLUMBIA BKG SYS COM 197236102 273,618 3,862 1.43 10,395 -0.07 0.0365
2021-08-16 2021-06-30 13F COLUMBIA BKG SYS COM 197236102 269,756 -28,882 -9.67 10,402 -19.16 0.0366
2021-05-17 2021-03-31 13F COLUMBIA BKG SYS COM 197236102 298,638 7,778 2.67 12,868 23.23 0.0566
2021-02-16 2020-12-31 13F COLUMBIA BKG SYS COM 197236102 290,860 -136,337 -31.91 10,442 2.49 0.0458
2020-11-16 2020-09-30 13F COLUMBIA BKG SYS COM 197236102 427,197 199,681 87.77 10,188 57.98 0.0401
2020-08-14 2020-06-30 13F COLUMBIA BKG SYS COM 197236102 227,516 181,473 394.14 6,449 422.61 0.0325
2020-05-15 2020-03-31 13F COLUMBIA BKG SYS COM 197236102 46,043 34,010 282.64 1,234 151.84 0.0080
2020-02-18 2019-12-31 13F COLUMBIA BKG SYS COM 197236102 12,033 -10,676 -47.01 490 -41.53 0.0016
2019-11-14 2019-09-30 13F COLUMBIA BKG SYS COM 197236102 22,709 22,709 838 0.0031
2019-05-15 2019-03-31 13F COLUMBIA BKG SYS COM 197236102 0 -44,684 -100.00 0 -100.00
2019-02-14 2018-12-31 13F COLUMBIA BKG SYS COM 197236102 44,684 -100,303 -69.18 1,621 -71.16 0.0072
2018-11-14 2018-09-30 13F COLUMBIA BKG SYS COM 197236102 144,987 116,568 410.18 5,621 383.73 0.0205
2018-08-14 2018-06-30 13F COLUMBIA BKG SYS COM 197236102 28,419 -18,881 -39.92 1,162 -41.46 0.0048
2018-05-15 2018-03-31 13F COLUMBIA BKG SYS COM 197236102 47,300 47,300 1,985 0.0091
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.