Historical shareholding details of Wellington Management Company LLP holdings in Columbia Banking System, Inc. (COLB)

Monthly changes of Wellington Management Company LLP shareholding in Columbia Banking System, Inc. over the previous months

Month	Name	Total no. shares held	Percent Holding
Month	Name	Total no. shares held	Percent Holding
Mar 31, 2025	Wellington Management Company Llp	845,653	0.40%

Feb 28, 2025	Wellington Management Company Llp	845,653	0.40%

Jan 31, 2025	Wellington Management Company Llp	855,271	0.41%

Dec 31, 2024	Wellington Management Company Llp	4,086,679	1.95%
Dec 31, 2024	Wellington Management Company Llp	1,115,669	0.53%

Nov 30, 2024	Wellington Management Company Llp	1,115,669	0.53%

Oct 31, 2024	Wellington Management Company Llp	901,497	0.43%

Sep 30, 2024	Wellington Management Company Llp	6,659,255	3.18%
Sep 30, 2024	Wellington Management Company Llp	901,497	0.43%

Aug 31, 2024	Wellington Management Company Llp	901,497	0.43%

Jul 31, 2024	Wellington Management Company Llp	897,005	0.43%

Jun 30, 2024	Wellington Management Company Llp	5,047,692	2.41%
Jun 30, 2024	Wellington Management Company Llp	473,145	0.23%

May 31, 2024	Wellington Management Company Llp	439,602	0.21%

Apr 30, 2024	Wellington Management Company Llp	439,602	0.21%

Mar 31, 2024	Wellington Management Company Llp	4,276,943	2.04%
Mar 31, 2024	Wellington Management Company Llp	439,602	0.21%

Feb 29, 2024	Wellington Management Company Llp	150,894	0.07%

Jan 31, 2024	Wellington Management Company Llp	21,736	0.01%

Dec 31, 2023	Wellington Management Company Llp	4,578,618	2.19%
Dec 31, 2023	Wellington Management Company Llp	21,736	0.01%

Sep 30, 2023	Wellington Management Company Llp	3,941,406	1.89%