SAM
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S.A. Mason’s Costco COST Stock Holding History

S.A. Mason’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
Q1 		$4.99M Buy
5,008
+5
+0.1% +$4.87K 1.87% 13
2025
Q4 		$4.31M Buy
5,003
+92
+2% +$83.4K 1.71% 12
2025
Q3 		$4.55M Sell
4,911
-45
-0.9% -$43.1K 2.01% 10
2025
Q2 		$4.91M Sell
4,956
-98
-2% -$97.4K 2.37% 7
2025
Q1 		$4.78M Sell
5,054
-28
-0.6% -$27.3K 2.53% 8
2024
Q4 		$4.66M Sell
5,082
-34
-0.7% -$31.5K 2.45% 9
2024
Q3 		$4.54M Buy
5,116
+10
+0.2% +$8.68K 2.4% 9
2024
Q2 		$4.34M Sell
5,106
-110
-2% -$85.8K 2.47% 8
2024
Q1 		$3.82M Buy
5,216
+3
+0.1% +$2.14K 2.3% 8
2023
Q4 		$3.44M Sell
5,213
-60
-1% -$35.6K 2.31% 10
2023
Q3 		$2.98M Buy
5,273
+21
+0.4% +$11.6K 2.15% 9
2023
Q2 		$2.61M Hold
5,252
– – 1.89% 9
2023
Q1 		$2.61M Sell
5,252
-24
-0.5% -$11.8K 1.89% 9
2022
Q4 		$2.41M Sell
5,276
-150
-3% -$73.3K 1.81% 8
2022
Q3 		$2.56M Sell
5,426
-238
-4% -$124K 2.03% 8
2022
Q2 		$2.71M Sell
5,664
-40
-0.7% -$20.3K 1.98% 8
2022
Q1 		$3.29M Sell
5,704
-14
-0.2% -$7.35K 2.05% 8
2021
Q4 		$3.25M Sell
5,718
-50
-0.9% -$25.6K 1.95% 9
2021
Q3 		$2.59M Sell
5,768
-10
-0.2% -$4.4K 1.71% 9
2021
Q2 		$2.29M Sell
5,778
-4
-0.1% -$1.51K 1.57% 9
2021
Q1 		$2.04M Buy
5,782
+213
+4% +$74.1K 1.52% 9
2020
Q4 		$2.1M Sell
5,569
-34
-0.6% -$12.7K 1.75% 9
2020
Q3 		$1.99M Buy
5,603
+13
+0.2% +$4.37K 1.89% 10
2020
Q2 		$1.7M Sell
5,590
-314
-5% -$95.5K 1.79% 11
2020
Q1 		$1.68M Sell
5,904
-38
-0.6% -$11.5K 2.04% 7
2019
Q4 		$1.75M Buy
+5,942
New +$1.77M 1.66% 9

Other funds holding COST

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.02T AUM 30.18% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
DAM
Diamant Asset Management Ridgefield, Connecticut $137B AUM 18.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

S.A. Mason's COST Position: Q1 2026 in Review

S.A. Mason increased its Costco (COST) stake by 0.1% in Q1 2026, buying an estimated $4.87K and bringing the position to 5,008 shares worth $4.99M. The position accounts for 1.87% of the portfolio, ranked #13.

S.A. Mason first reported a position in COST in Q4 2019 and has held it in 26 quarters since. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • S.A. Mason held 5,008 shares of Costco worth $4.99M as of Q1 2026.
  • S.A. Mason bought 5 Costco shares in Q1 2026, an estimated $4.87K.
  • Costco made up 1.87% of S.A. Mason's portfolio in Q1 2026, its #13 holding.
  • S.A. Mason first reported a position in Costco in Q4 2019 and has held it in 26 quarters since.
  • 4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on S.A. Mason's 13F filing for Q1 2026, filed 27 Apr 2026.