컬럼비아 뱅킹 시스템, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership141,398 shares
Latest Disclosed Value $ 3,878,547
Renaissance Technologies Llc ownership in COLB / Columbia Banking System, Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 141,398 shares of Columbia Banking System, Inc. (US:COLB) valued at $3,878,547 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 13, 2025 disclosing 0 shares of Columbia Banking System, Inc.. The current value of the position is $4,193,865 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)
2026-05-14 2026-03-31 13F COLUMBIA BKG SYS COM 197236102 141,398 141,398 3,879 0.0061
2025-11-13 2025-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -229,096 -100.00 0 -100.00
2025-08-13 2025-06-30 13F COLUMBIA BKG SYS COM 197236102 229,096 -142,600 -38.36 5,356 -42.22 0.0071
2025-05-14 2025-03-31 13F COLUMBIA BKG SYS COM 197236102 371,696 371,696 9,270 0.0140
2024-11-13 2024-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -573,596 -100.00 0 -100.00
2024-08-09 2024-06-30 13F COLUMBIA BKG SYS COM 197236102 573,596 273,018 90.83 11,409 228,060.00 0.0194
2024-05-13 2024-03-31 13F COLUMBIA BKG SYS COM 197236102 300,578 212,082 239.65 6 150.00 0.0091
2024-02-13 2023-12-31 13F COLUMBIA BKG SYS COM 197236102 88,496 88,496 2 0.0037
2023-05-12 2023-03-31 13F COLUMBIA BKG SYS COM 197236102 0 -42,886 -100.00 0 -100.00
2023-02-13 2022-12-31 13F COLUMBIA BKG SYS COM 197236102 42,886 -300,500 -87.51 1 -99.99 0.0018
2022-11-14 2022-09-30 13F COLUMBIA BKG SYS COM 197236102 343,386 -358,700 -51.09 9,920 -50.68 0.0140
2022-08-12 2022-06-30 13F COLUMBIA BKG SYS COM 197236102 702,086 174,800 33.15 20,115 18.21 0.0238
2022-05-13 2022-03-31 13F COLUMBIA BKG SYS COM 197236102 527,286 136,700 35.00 17,016 33.15 0.0200
2022-02-11 2021-12-31 13F COLUMBIA BKG SYS COM 197236102 390,586 252,880 183.64 12,780 144.31 0.0159
2021-11-12 2021-09-30 13F COLUMBIA BKG SYS COM 197236102 137,706 42,700 44.94 5,231 42.81 0.0068
2021-08-13 2021-06-30 13F COLUMBIA BKG SYS COM 197236102 95,006 95,006 3,663 0.0046
2020-08-13 2020-06-30 13F COLUMBIA BKG SYS COM 197236102 0 -42,106 -100.00 0 -100.00
2020-05-14 2020-03-31 13F COLUMBIA BKG SYS COM 197236102 42,106 42,106 1,128 0.0011
2019-11-13 2019-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -20,506 -100.00 0 -100.00
2019-08-12 2019-06-30 13F COLUMBIA BKG SYS COM 197236102 20,506 -59,100 -74.24 742 -71.48 0.0007
2019-05-14 2019-03-31 13F COLUMBIA BKG SYS COM 197236102 79,606 -17,400 -17.94 2,602 -26.08 0.0024
2019-02-12 2018-12-31 13F COLUMBIA BKG SYS COM 197236102 97,006 97,006 21.86 3,520 35.28 0.0039
2018-11-13 2018-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -30,178 -100.00 0 -100.00
2018-08-13 2018-06-30 13F COLUMBIA BKG SYS COM 197236102 30,178 0 0.00 1,266 0.00 0.0014
2018-05-14 2018-03-31 13F COLUMBIA BKG SYS COM 197236102 30,178 -100,900 -76.98 1,266 -77.77 0.0014
2018-02-13 2017-12-31 13F COLUMBIA BKG SYS COM 197236102 131,078 91,491 231.11 5,694 241.57 0.0063
2017-11-13 2017-09-30 13F COLUMBIA BKG SYS COM 197236102 39,587 -20,492 -34.11 1,667 -30.37 0.0020
2017-08-11 2017-06-30 13F COLUMBIA BKG SYS COM 197236102 60,079 -66,000 -52.35 2,394 -51.30 0.0031
2017-05-12 2017-03-31 13F COLUMBIA BKG SYS COM 197236102 126,079 126,079 109.86 4,916 105.35 0.0069
2016-11-14 2016-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -181,279 -100.00 0 -100.00
2016-08-12 2016-06-30 13F COLUMBIA BKG SYS COM 197236102 181,279 -81,500 -31.01 5,087 -35.30 0.0097
2016-05-13 2016-03-31 13F COLUMBIA BKG SYS COM 197236102 262,779 177,079 206.63 7,862 182.20 0.0149
2016-02-11 2015-12-31 13F COLUMBIA BKG SYS COM 197236102 85,700 31,400 57.83 2,786 64.37 0.0061
2015-11-12 2015-09-30 13F COLUMBIA BKG SYS COM 197236102 54,300 22,600 71.29 1,695 64.24 0.0040
2015-08-14 2015-06-30 13F COLUMBIA BKG SYS COM 197236102 31,700 15,800 99.37 1,032 123.86 0.0024
2015-05-13 2015-03-31 13F COLUMBIA BKG SYS COM 197236102 15,900 15,900 -49.84 461 -55.33 0.0010
2014-11-12 2014-09-30 13F COLUMBIA BKG SYS COM 197236102 0 -42,779 -100.00 0 -100.00
2014-08-13 2014-06-30 13F COLUMBIA BKG SYS COM 197236102 42,779 -136,961 -76.20 1,126 -78.03 0.0026
2014-05-14 2014-03-31 13F COLUMBIA BKG SYS COM 197236102 179,740 -41,839 -18.88 5,126 -15.84 0.0123
2014-02-14 2013-12-31 13F COLUMBIA BKG SYS COM 197236102 221,579 29,700 15.48 6,091 28.53 0.0146
2013-11-13 2013-09-30 13F COLUMBIA BKG SYS COM 197236102 191,879 72,600 60.87 4,739 66.87 0.0115
2013-08-12 2013-06-30 13F COLUMBIA BKG SYS COM 197236102 119,279 119,279 2,840 0.0074
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.