Columbia Banking System, Inc.

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC COLB

Report date

12/31/2025

Quarter

2025 Q4

Filed

2/9/2026

Shares

12,232

Value ($000)

342

Weight

0.0%

2020 Q3 - 2025 Q4 (18 filings)

Shares History

History scope: non-option holdings only (PUT/CALL rows excluded).

All 13F Holders	Filing date	Value ($000s)	% of Holdings	Shares	Reporting period
2025 Q4	2/9/2026	342	0.0%	12,232	12/31/2025
2025 Q3	11/12/2025	25,834	0.1%	1,003,636	9/30/2025
2025 Q2	7/29/2025	26,160	0.1%	1,118,924	6/30/2025
2025 Q1	5/9/2025	30,169	0.1%	1,209,644	3/31/2025
2024 Q4	2/10/2025	47,928	0.1%	1,774,443	12/31/2024
2024 Q3	11/8/2024	45,220	0.1%	1,731,916	9/30/2024
2024 Q2	8/8/2024	35,540	0.1%	1,786,845	6/30/2024
2024 Q1	5/8/2024	34,686	0.1%	1,792,571	3/31/2024
2023 Q4	2/9/2024	42,084	0.1%	1,577,351	12/31/2023
2023 Q3	11/9/2023	30,554	0.1%	1,505,140	9/30/2023
2023 Q2	8/11/2023	27,543	0.1%	1,358,129	6/30/2023
2023 Q1	5/12/2023	21,092	0.1%	984,692	3/31/2023
2022 Q4	2/9/2023	22,654	0.1%	751,859	12/31/2022
2022 Q3	11/9/2022	17,324	0.1%	599,649	9/30/2022
2022 Q2	8/10/2022	16,227	0.1%	566,376	6/30/2022
2021 Q1	5/13/2021	19,181	0.1%	445,145	3/31/2021
2020 Q4	2/9/2021	12,012	0.0%	334,607	12/31/2020
2020 Q3	11/6/2020	6,253	0.0%	262,181	9/30/2020