Main Street Group’s Costco COST Stock Holding History

Main Street Group’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	$1.16M	Buy	1,243 +17	+1%	+$16.9K	0.27%	34
2026 Q1	$1.22M	Buy	1,226 +10	+0.8%	+$9.74K	0.36%	31
2025 Q4	$1.05M	Sell	1,216 -33	-3%	-$29.9K	0.36%	28
2025 Q3	$1.16M	Buy	1,249 +10	+0.8%	+$9.59K	0.34%	30
2025 Q2	$1.23M	Sell	1,239 -25	-2%	-$24.8K	0.4%	29
2025 Q1	$1.19M	Sell	1,264 -6	-0.5%	-$5.85K	0.46%	26
2024 Q4	$1.16M	Buy	1,270 +21	+2%	+$19.5K	0.43%	26
2024 Q3	$1.11M	Buy	1,249 +19	+2%	+$16.5K	0.44%	27
2024 Q2	$1.04M	Sell	1,230 -4	-0.3%	-$3.12K	0.43%	27
2024 Q1	$890K	Hold	1,234	–	–	0.39%	31
2023 Q4	$815K	Buy	+1,234	New	+$731K	0.28%	40

Other funds holding COST

Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return

Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return

Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return

Parnassus Investments San Francisco, California $37.4B AUM 35.42% 1-Year Est. Return

Emerald Advisors Bellevue, Washington $796M AUM 2.51% 1-Year Est. Return

New York State Common Retirement Fund Albany, New York $79.3B AUM 43.63% 1-Year Est. Return

PTC

Provident Trust Company Waukesha, Wisconsin $4.77B AUM 29.31% 1-Year Est. Return

Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return

Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return

Commonwealth Equity Services Waltham, Massachusetts $79.5B AUM 27.1% 1-Year Est. Return

Main Street Group's COST Position: Q2 2026 in Review

Main Street Group increased its Costco (COST) stake by 1.4% in Q2 2026, buying an estimated $16.9K and bringing the position to 1,243 shares worth $1.16M. The position accounts for 0.27% of the portfolio, ranked #34.

Main Street Group first reported a position in COST in Q4 2023 and has held it in 11 quarters since. The position peaked at $1.23M in Q2 2025. 2,087 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Main Street Group held 1,243 shares of Costco worth $1.16M as of Q2 2026.
Main Street Group bought 17 Costco shares in Q2 2026, an estimated $16.9K.
Costco made up 0.27% of Main Street Group's portfolio in Q2 2026, its #34 holding.
Main Street Group first reported a position in Costco in Q4 2023 and has held it in 11 quarters since.
Main Street Group's Costco position peaked at $1.23M in Q2 2025.
2,087 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Main Street Group's 13F filing for Q2 2026, filed 13 Jul 2026.