Aperio Group, LLC reports 5.48% decrease in ownership of COLB / Columbia Banking System, Inc.

Columbia Banking System, Inc.

US ˙ NasdaqGS ˙ US1972361026

Security	COLB / Columbia Banking System, Inc.
Institution	Aperio Group, LLC
Latest Disclosed Ownership	14,630 shares
Latest Disclosed Value	$ 525,000

On February 5, 2021 - Aperio Group, LLC filed a 13F-HR form disclosing ownership of 14,630 shares of Columbia Banking System, Inc. (US:COLB) valued at $525,217 USD as of December 31, 2020. The entity filed a previous 13F-HR on November 6, 2020 disclosing 15,479 shares of Columbia Banking System, Inc.. This represents a change in shares of -5.48% during the quarter. The current value of the position is $433,926 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	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2021-02-05	2020-12-31	13F	COLUMBIA BKG SYS	COM	197236102	14,630	-849	-5.48	525	42.28	0.0016
2020-11-06	2020-09-30	13F	COLUMBIA BKG SYS	COM	197236102	15,479	-7,967	-33.98	369	-44.51	0.0012
2020-08-13	2020-06-30	13F	COLUMBIA BKG SYS	COM	197236102	23,446	3,533	17.74	665	24.53	0.0025
2020-05-05	2020-03-31	13F	COLUMBIA BKG SYS	COM	197236102	19,913	-1,977	-9.03	534	-40.07	0.0024
2020-02-13	2019-12-31	13F	COLUMBIA BKG SYS	COM	197236102	21,890	-203	-0.92	891	9.33	0.0032
2019-11-06	2019-09-30	13F	COLUMBIA BKG SYS	COM	197236102	22,093	-602	-2.65	815	-0.73	0.0032
2019-07-30	2019-06-30	13F	COLUMBIA BKG SYS	COM	197236102	22,695	1,520	7.18	821	18.64	0.0034
2019-05-13	2019-03-31	13F	COLUMBIA BKG SYS	COM	197236102	21,175	-3,811	-15.25	692	-23.70	0.0030
2019-05-06	2018-12-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	24,986	-4,523	-15.33	907	-20.72	0.0046
2019-02-14	2018-12-31	13F	COLUMBIA BKG SYS	COM	197236102	24,087	-5,422		874
2019-05-06	2018-09-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	29,509	7,248	32.56	1,144	25.71	0.0050
2018-10-17	2018-09-30	13F	COLUMBIA BKG SYS	COMMON	197236102	29,509	7,248		1,144
2019-05-06	2018-06-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	22,261	-182	-0.81	910	-3.29	0.0044
2018-07-30	2018-06-30	13F	COLUMBIA BKG SYS	COMMON	197236102	22,261	-182		910
2019-05-01	2018-03-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	22,443	-970	-4.14	941	-7.47	0.0047
2018-05-08	2018-03-31	13F	COLUMBIA BKG SYS	COMMON	197236102	22,443	-970		941
2019-05-01	2017-12-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	23,413	4,292	22.45	1,017	26.34	0.0053
2018-02-02	2017-12-31	13F	COLUMBIA BKG SYS	COMMON	197236102	23,413	4,292		1,017
2019-05-01	2017-09-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	19,121	-860	-4.30	805	1.13	0.0045
2017-10-25	2017-09-30	13F	COLUMBIA BKG SYS	COMMON	197236102	19,121	-860		805
2019-04-22	2017-06-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	19,981	7,699	62.69	796	66.18	0.0049
2017-07-18	2017-06-30	13F	COLUMBIA BKG SYS	COMMON	197236102	19,981	7,699		796
2019-04-22	2017-03-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	12,282	2,112	20.77	479	5.51	0.0033
2017-05-05	2017-03-31	13F	COLUMBIA BKG SYS	COMMON	197236102	12,282	2,112		479
2019-04-22	2016-12-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	10,170	1,897	22.93	454	67.53	0.0035
2017-02-14	2016-12-31	13F	COLUMBIA BKG SYS	COMMON	197236102	10,170	1,897		454
2019-04-12	2016-09-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	8,273	1,118	15.63	271	34.83	0.0020
2016-11-01	2016-09-30	13F	COLUMBIA BKG SYS	COMMON	197236102	8,273	1,118		271
2019-04-12	2016-06-30	13F/A-1	COLUMBIA BKG SYS	COM	197236102	7,155	-512	-6.68	201	-12.23	0.0016
2016-08-12	2016-06-30	13F	COLUMBIA BKG SYS	COMMON	197236102	7,155	-512		201
2019-04-12	2016-03-31	13F/A-1	COLUMBIA BKG SYS	COM	197236102	7,667	-2,513	-24.69	229	-30.82	0.0020
2016-04-28	2016-03-31	13F	COLUMBIA BKG SYS	COMMON	197236102	7,667	-2,513		229
2016-01-21	2015-12-31	13F	COLUMBIA BKG SYS	COMMON	197236102	10,180	227	2.28	331	6.43	0.0030
2015-10-19	2015-09-30	13F	COLUMBIA BKG SYS	COMMON	197236102	9,953	2,366	31.18	311	25.91	0.0032
2015-07-29	2015-06-30	13F	COLUMBIA BKG SYS	COMMON	197236102	7,587	64	0.85	247	13.30	0.0025
2015-04-29	2015-03-31	13F	COLUMBIA BKG SYS	COMMON	197236102	7,523			218

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.