Columbia Banking System, Inc.
US ˙ NasdaqGS ˙ US1972361026

SecurityCOLB / Columbia Banking System, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership3,794 shares
Latest Disclosed Value $ 106,070
Parallel Advisors, LLC ownership in COLB / Columbia Banking System, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 3,794 shares of Columbia Banking System, Inc. (US:COLB) valued at $106,042 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 3,202 shares of Columbia Banking System, Inc.. This represents a change in shares of 18.49% during the quarter. The current value of the position is $108,470 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (COLB) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

COLB / Columbia Banking System, Inc. Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 3,794 592 18.49 106 29.27 0.0019
2025-11-13 2025-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 3,202 523 19.52 82 32.26 0.0015
2025-07-08 2025-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 2,679 785 41.45 63 31.91 0.0013
2025-04-08 2025-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 1,894 66 3.61 47 -4.08 0.0011
2025-02-10 2024-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 1,828 273 17.56 49 22.50 0.0011
2024-11-13 2024-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 1,555 63 4.22 41 37.93 0.0010
2024-08-08 2024-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 1,492 -370 -19.87 30 -19.44 0.0008
2024-05-06 2024-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 1,862 -215 -10.35 36 -34.55 0.0010
2024-02-12 2023-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 2,077 23 1.12 55 34.15 0.0016
2024-05-20 2023-09-30 13F/A-1 COLUMBIA BANKING SYSTEM Stock 197236102 2,054 -149 -6.76 42 -6.82 0.0014
2023-11-14 2023-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 2,054 -149 42 0.0014
2024-05-20 2023-06-30 13F/A-1 COLUMBIA BANKING SYSTEM Stock 197236102 2,203 -568 -20.50 45 -25.42 0.0014
2023-08-04 2023-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 2,203 -568 45 0.0014
2024-05-20 2023-03-31 13F/A-1 COLUMBIA BANKING SYSTEM Stock 197236102 2,771 2,680 2,945.05 59 2,850.00 0.0020
2023-04-25 2023-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 2,771 2,680 59 0.0020
2023-02-06 2022-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 91 0 0.00 3 -33.33 0.0001
2022-11-10 2022-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 91 0 0.00 3 0.00 0.0001
2022-08-01 2022-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 91 14 18.18 3 0.00 0.0001
2022-04-28 2022-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 77 -34 -30.63 3 -25.00 0.0001
2022-01-20 2021-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 111 0 0.00 4 0.00 0.0001
2021-11-02 2021-09-30 13F/A-1 COLUMBIA BANKING SYSTEM Stock 197236102 111 0 0.00 4 0.00 0.0002
2021-08-06 2021-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 111 0 0.00 4 -20.00 0.0002
2021-04-23 2021-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 111 0 0.00 5 25.00 0.0002
2021-02-02 2020-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 111 -187 -62.75 4 -42.86 0.0002
2020-10-27 2020-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 298 0 0.00 7 -12.50 0.0004
2020-07-16 2020-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 298 -129 -30.21 8 -27.27 0.0005
2020-04-27 2020-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 427 12 2.89 11 -35.29 0.0009
2020-01-30 2019-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 415 0 0.00 17 13.33 0.0013
2019-11-01 2019-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 415 28 7.24 15 7.14 0.0013
2019-08-05 2019-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 387 -70 -15.32 14 -6.67 0.0014
2019-05-01 2019-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 457 1 0.22 15 -6.25 0.0017
2019-02-05 2018-12-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 456 0 0.00 16 -11.11 0.0022
2018-11-01 2018-09-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 456 0 0.00 18 0.00 0.0022
2018-07-30 2018-06-30 13F COLUMBIA BANKING SYSTEM Stock 197236102 456 0 0.00 18 -5.26 0.0026
2018-05-08 2018-03-31 13F COLUMBIA BANKING SYSTEM Stock 197236102 456 0 0.00 19 -5.00 0.0030
2018-02-13 2017-12-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 456 0 0.00 20 0.00 0.0033
2017-11-15 2017-09-30 13F/A-1 COLUMBIA BKG SYS INC COM Stock 197236102 456 -16 -3.39 20 5.26 0.0034
2017-08-07 2017-06-30 13F COLUMBIA BKG SYS INC COM Stock 197236102 472 29 6.55 19 5.56 0.0036
2017-05-12 2017-03-31 13F/A-1 COLUMBIA BKG SYS INC COM Stock 197236102 443 87 24.44 18 12.50 0.0036
2017-05-12 2017-03-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 443 18
2017-02-14 2016-12-31 13F COLUMBIA BKG SYS INC COM Stock 197236102 356 356 16 0.0038
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F COLUMBIA BANKING SYSTEM Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F COLUMBIA BANKING SYSTEM Stock Call 111 4 n/a n/a n/a
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.