Picton Mahoney Asset Management’s Costco COST Stock Holding History

Picton Mahoney Asset Management’s Portfolio COST Stock Details COST Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$879K	Sell	940 -10,058	-91%	-$10M	0.01%	738
2026 Q1	$11M	Buy	10,998 +10,574	+2,494%	+$10.3M	0.08%	221
2025 Q4	$366K	Buy	+424	New	+$384K	﹤0.01%	728
2025 Q3	–	Sell	-3,614	Closed	-$3.58M	–	1097
2025 Q2	$3.58M	Sell	3,614 -632	-15%	-$628K	0.04%	286
2025 Q1	$4.02M	Buy	+4,246	New	+$4.14M	0.07%	205
2013 Q4	–	Sell	-65,600	Closed	-$7.55M	–	350
2013 Q3	$7.55M	Sell	65,600 -5,600	-8%	-$646K	0.5%	72
2013 Q2	$7.87M	Buy	+71,200	New	+$7.78M	0.58%	63

Other funds holding COST

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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Norges Bank Oslo, Norway $1T AUM

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

Picton Mahoney Asset Management's COST Position: Q2 2026 in Review

Picton Mahoney Asset Management reduced its Costco (COST) stake by 91% in Q2 2026, selling an estimated $10M and leaving 940 shares worth $879K. The position accounts for 0.01% of the portfolio, ranked #738.

Picton Mahoney Asset Management first reported a position in COST in Q2 2013 and has held it in 7 quarters since. The position peaked at $11M in Q1 2026. 4,224 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Picton Mahoney Asset Management held 940 shares of Costco worth $879K as of Q2 2026.
Picton Mahoney Asset Management sold 10,058 Costco shares in Q2 2026, an estimated $10M.
Costco made up 0.01% of Picton Mahoney Asset Management's portfolio in Q2 2026, its #738 holding.
Picton Mahoney Asset Management first reported a position in Costco in Q2 2013 and has held it in 7 quarters since.
Picton Mahoney Asset Management's Costco position peaked at $11M in Q1 2026.
4,224 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Picton Mahoney Asset Management's 13F filing for Q2 2026, filed 13 Aug 2026.