Dark Forest Capital Management’s Columbia Banking Systems COLB Stock Holding History

Dark Forest Capital Management’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
2026 Q2	–	Sell	-8,278	Closed	-$227K	–	837
2026 Q1	$227K	Sell	8,278 -96,922	-92%	-$2.8M	0.02%	722
2025 Q4	$2.94M	Buy	+105,200	New	+$2.85M	0.13%	241
2023 Q3	–	Sell	-25,488	Closed	-$517K	–	1113
2023 Q2	$517K	Buy	+25,488	New	+$538K	0.05%	617
2021 Q4	–	Sell	-311	Closed	-$12K	–	1490
2021 Q3	$12K	Buy	311 +244	+364%	+$8.7K	﹤0.01%	947
2021 Q2	$3K	Buy	+67	New	+$2.85K	﹤0.01%	737

Other funds holding COLB

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Charles Schwab San Francisco, California $751B AUM 38.74% 1-Year Est. Return

T. Rowe Price Associates Baltimore, Maryland $999B AUM 46.22% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

Dark Forest Capital Management's COLB Position: Q2 2026 in Review

Dark Forest Capital Management sold out of Columbia Banking Systems (COLB) in Q2 2026, closing a stake of 8,278 shares — an estimated $227K sold.

Dark Forest Capital Management first reported a position in COLB in Q2 2021 and held it in 5 quarters. The position peaked at $2.94M in Q4 2025. 555 funds tracked by Wall St. Rank hold COLB as of Q2 2026.

Dark Forest Capital Management reported no remaining Columbia Banking Systems position as of Q2 2026 after selling out during the quarter.
Dark Forest Capital Management sold 8,278 Columbia Banking Systems shares in Q2 2026, an estimated $227K.
Dark Forest Capital Management first reported a position in Columbia Banking Systems in Q2 2021 and held it in 5 quarters.
Dark Forest Capital Management's Columbia Banking Systems position peaked at $2.94M in Q4 2025.
555 funds tracked by Wall St. Rank held Columbia Banking Systems as of Q2 2026.

Based on Dark Forest Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.