St. Clair Advisors’s Costco COST Stock Holding History

St. Clair Advisors’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 Q3	$1.82M	Buy	2,000 +25	+1%	+$23.3K	0.45%	37
2026 Q2	$1.85M	Hold	1,975	–	–	0.48%	37
2026 Q1	$1.97M	Hold	1,975	–	–	0.52%	36
2025 Q4	$1.7M	Hold	1,975	–	–	0.44%	37
2025 Q3	$1.83M	Hold	1,975	–	–	0.49%	35
2025 Q2	$1.96M	Hold	1,975	–	–	0.51%	33
2025 Q1	$1.87M	Hold	1,975	–	–	0.52%	33
2024 Q4	$1.81M	Hold	1,975	–	–	0.52%	32
2024 Q3	$1.75M	Hold	1,975	–	–	0.5%	30
2024 Q2	$1.68M	Sell	1,975 -25	-1%	-$19.5K	0.54%	29
2024 Q1	$1.47M	Hold	2,000	–	–	0.48%	33
2023 Q4	$1.32M	Hold	2,000	–	–	0.46%	38
2023 Q3	$1.13M	Hold	2,000	–	–	0.45%	36
2023 Q2	$1.08M	Hold	2,000	–	–	0.42%	38
2023 Q1	$994K	Buy	+2,000	New	+$981K	0.43%	38

Other funds holding COST

Emerald Advisors Bellevue, Washington $781M AUM 4.78% 1-Year Est. Return

Parnassus Investments San Francisco, California $33.8B AUM 31.08% 1-Year Est. Return

Assenagon Asset Management Senningerberg, Luxembourg $103B AUM 40.17% 1-Year Est. Return

New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 1-Year Est. Return

TD Waterhouse Canada Toronto, Ontario, Canada $38.4B AUM 30.28% 1-Year Est. Return

Cardano Risk Management Rotterdam, Netherlands $18.2B AUM 38.97% 1-Year Est. Return

Loring Wolcott & Coolidge Fiduciary Advisors Boston, Massachusetts $10.8B AUM 9.05% 1-Year Est. Return

Ninety One (UK) London, United Kingdom $45.5B AUM 15.2% 1-Year Est. Return

Sarasin & Partners London, United Kingdom $8.93B AUM 11.81% 1-Year Est. Return

Congress Asset Management Boston, Massachusetts $15.4B AUM 30.39% 1-Year Est. Return

St. Clair Advisors's COST Position: Q3 2026 in Review

St. Clair Advisors increased its Costco (COST) stake by 1.3% in Q3 2026, buying an estimated $23.3K and bringing the position to 2,000 shares worth $1.82M. The position accounts for 0.45% of the portfolio, ranked #37.

St. Clair Advisors first reported a position in COST in Q1 2023 and has held it in 15 quarters since. The position peaked at $1.97M in Q1 2026. 1,392 funds tracked by Wall St. Rank hold COST as of Q3 2026.

St. Clair Advisors held 2,000 shares of Costco worth $1.82M as of Q3 2026.
St. Clair Advisors bought 25 Costco shares in Q3 2026, an estimated $23.3K.
Costco made up 0.45% of St. Clair Advisors's portfolio in Q3 2026, its #37 holding.
St. Clair Advisors first reported a position in Costco in Q1 2023 and has held it in 15 quarters since.
St. Clair Advisors's Costco position peaked at $1.97M in Q1 2026.
1,392 funds tracked by Wall St. Rank held Costco as of Q3 2026.

Based on St. Clair Advisors's 13F filing for Q3 2026, filed 13 Oct 2026.