Atom Investors’s Columbia Banking Systems COLB Stock Holding History

Atom Investors’s Portfolio COLB Stock Details COLB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-21,648	Closed	-$557K	–	622
2025 Q3	$557K	Buy	+21,648	New	+$550K	0.04%	347
2024 Q2	–	Sell	-10,350	Closed	-$200K	–	511
2024 Q1	$200K	Sell	10,350 -3,823	-27%	-$78.7K	0.03%	486
2023 Q4	$378K	Sell	14,173 -42,207	-75%	-$938K	0.07%	321
2023 Q3	$1.14M	Buy	56,380 +33,558	+147%	+$700K	0.26%	116
2023 Q2	$463K	Sell	22,822 -10,360	-31%	-$219K	0.18%	115
2023 Q1	$711K	Buy	+33,182	New	+$922K	0.39%	67
2021 Q2	–	Sell	-8,572	Closed	-$369K	–	260
2021 Q1	$369K	Sell	8,572 -7,658	-47%	-$334K	0.06%	175
2020 Q4	$583K	Buy	+16,230	New	+$503K	0.06%	232
2019 Q2	–	Sell	-15,629	Closed	-$511K	–	443
2019 Q1	$511K	Sell	15,629 -12,492	-44%	-$454K	0.04%	320
2018 Q4	$1.02M	Buy	+28,121	New	+$1.05M	0.1%	334

Other funds holding COLB

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Charles Schwab San Francisco, California $654B AUM 26.35% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return

Bank of New York Mellon New York $544B AUM 28.31% 1-Year Est. Return

Atom Investors's COLB Position: Q4 2025 in Review

Atom Investors sold out of Columbia Banking Systems (COLB) in Q4 2025, closing a stake of 21,648 shares — an estimated $557K sold.

Atom Investors first reported a position in COLB in Q4 2018 and held it in 10 quarters. The position peaked at $1.14M in Q3 2023. 502 funds tracked by Wall St. Rank hold COLB as of Q4 2025.

Atom Investors reported no remaining Columbia Banking Systems position as of Q4 2025 after selling out during the quarter.
Atom Investors sold 21,648 Columbia Banking Systems shares in Q4 2025, an estimated $557K.
Atom Investors first reported a position in Columbia Banking Systems in Q4 2018 and held it in 10 quarters.
Atom Investors's Columbia Banking Systems position peaked at $1.14M in Q3 2023.
502 funds tracked by Wall St. Rank held Columbia Banking Systems as of Q4 2025.

Based on Atom Investors's 13F filing for Q4 2025, filed 17 Feb 2026.