Mason Investment Advisory Services’s Costco COST Stock Holding History

Mason Investment Advisory Services’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	$392K	Sell	419 -8	-2%	-$7.97K	0.01%	55
2026 Q1	$426K	Hold	427	–	–	0.02%	51
2025 Q4	$368K	Sell	427 -201	-32%	-$182K	0.02%	54
2025 Q3	$581K	Buy	628 +211	+51%	+$202K	0.03%	48
2025 Q2	$413K	Buy	417 +1	+0.2%	+$994	0.02%	51
2025 Q1	$394K	Hold	416	–	–	0.02%	50
2024 Q4	$381K	Sell	416 -4	-1%	-$3.71K	0.02%	54
2024 Q3	$373K	Sell	420 -162	-28%	-$141K	0.02%	51
2024 Q2	$495K	Buy	582 +168	+41%	+$131K	0.03%	41
2024 Q1	$303K	Hold	414	–	–	0.02%	52
2023 Q4	$273K	Buy	414 +25	+6%	+$14.8K	0.02%	54
2023 Q3	$220K	Hold	389	–	–	0.02%	62
2023 Q2	$209K	Buy	+389	New	+$197K	0.02%	63
2022 Q4	–	Sell	-1,004	Closed	-$474K	–	89
2022 Q3	$474K	Buy	1,004 +4	+0.4%	+$2.08K	0.05%	29
2022 Q2	$479K	Hold	1,000	–	–	0.05%	39
2022 Q1	$576K	Hold	1,000	–	–	0.05%	68
2021 Q4	$568K	Hold	1,000	–	–	0.05%	64
2021 Q3	$449K	Hold	1,000	–	–	0.05%	68
2021 Q2	$396K	Hold	1,000	–	–	0.04%	71
2021 Q1	$352K	Hold	1,000	–	–	0.04%	70
2020 Q4	$377K	Hold	1,000	–	–	0.05%	68
2020 Q3	$355K	Hold	1,000	–	–	0.05%	63
2020 Q2	$303K	Hold	1,000	–	–	0.05%	70
2020 Q1	$285K	Hold	1,000	–	–	0.05%	71
2019 Q4	$294K	Hold	1,000	–	–	0.04%	78
2019 Q3	$288K	Hold	1,000	–	–	0.05%	77
2019 Q2	$264K	Hold	1,000	–	–	0.04%	76
2019 Q1	$242K	Buy	+1,000	New	+$219K	0.07%	73

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

Mason Investment Advisory Services's COST Position: Q2 2026 in Review

Mason Investment Advisory Services reduced its Costco (COST) stake by 1.9% in Q2 2026, selling an estimated $7.97K and leaving 419 shares worth $392K. The position accounts for 0.01% of the portfolio, ranked #55.

Mason Investment Advisory Services first reported a position in COST in Q1 2019 and has held it in 28 quarters since. The position peaked at $581K in Q3 2025. 4,248 funds tracked by Wall St. Rank hold COST as of Q2 2026.

Mason Investment Advisory Services held 419 shares of Costco worth $392K as of Q2 2026.
Mason Investment Advisory Services sold 8 Costco shares in Q2 2026, an estimated $7.97K.
Costco made up 0.01% of Mason Investment Advisory Services's portfolio in Q2 2026, its #55 holding.
Mason Investment Advisory Services first reported a position in Costco in Q1 2019 and has held it in 28 quarters since.
Mason Investment Advisory Services's Costco position peaked at $581K in Q3 2025.
4,248 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Mason Investment Advisory Services's 13F filing for Q2 2026, filed 13 Aug 2026.