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Mather Group’s Costco COST Stock Holding History

Mather 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
Q1 		$9.23M Buy
9,264
+1,100
+13% +$1.07M 0.09% 89
2025
Q4 		$7.04M Buy
8,164
+354
+5% +$321K 0.07% 101
2025
Q3 		$7.23M Buy
7,810
+293
+4% +$281K 0.07% 97
2025
Q2 		$7.44M Sell
7,517
-173
-2% -$172K 0.08% 95
2025
Q1 		$7.27M Buy
7,690
+424
+6% +$413K 0.08% 93
2024
Q4 		$6.66M Sell
7,266
-421
-5% -$391K 0.09% 94
2024
Q3 		$6.82M Sell
7,687
-5,724
-43% -$4.97M 0.09% 96
2024
Q2 		$9.83M Buy
13,411
+5,447
+68% +$4.25M 0.12% 83
2024
Q1 		$5.26M Sell
7,964
-1,867
-19% -$1.33M 0.08% 91
2023
Q4 		$6.49M Buy
9,831
+231
+2% +$137K 0.1% 80
2023
Q3 		$5.42M Buy
9,600
+3,444
+56% +$1.9M 0.1% 84
2023
Q2 		$3.31M Buy
6,156
+645
+12% +$326K 0.05% 124
2023
Q1 		$2.74M Buy
5,511
+1,802
+49% +$884K 0.05% 124
2022
Q4 		$1.69M Buy
3,709
+621
+20% +$303K 0.03% 148
2022
Q3 		$1.46M Buy
3,088
+169
+6% +$87.9K 0.03% 155
2022
Q2 		$1.4M Buy
2,919
+603
+26% +$306K 0.03% 150
2022
Q1 		$1.33M Buy
2,316
+306
+15% +$161K 0.03% 136
2021
Q4 		$1.14M Buy
2,010
+38
+2% +$19.5K 0.02% 139
2021
Q3 		$886K Buy
1,972
+535
+37% +$235K 0.02% 126
2021
Q2 		$568K Sell
1,437
-225
-14% -$85.1K 0.01% 152
2021
Q1 		$586K Sell
1,662
-168
-9% -$58.5K 0.02% 130
2020
Q4 		$689K Buy
1,830
+195
+12% +$72.9K 0.02% 115
2020
Q3 		$580K Buy
1,635
+197
+14% +$66.2K 0.02% 124
2020
Q2 		$436K Buy
1,438
+186
+15% +$56.6K 0.02% 141
2020
Q1 		$357K Buy
+1,252
New +$380K 0.03% 103

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

Mather Group's COST Position: Q1 2026 in Review

Mather Group increased its Costco (COST) stake by 13% in Q1 2026, buying an estimated $1.07M and bringing the position to 9,264 shares worth $9.23M. The position accounts for 0.09% of the portfolio, ranked #89.

Mather Group first reported a position in COST in Q1 2020 and has held it in 25 quarters since. The position peaked at $9.83M in Q2 2024. 4,236 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Mather Group held 9,264 shares of Costco worth $9.23M as of Q1 2026.
  • Mather Group bought 1,100 Costco shares in Q1 2026, an estimated $1.07M.
  • Costco made up 0.09% of Mather Group's portfolio in Q1 2026, its #89 holding.
  • Mather Group first reported a position in Costco in Q1 2020 and has held it in 25 quarters since.
  • Mather Group's Costco position peaked at $9.83M in Q2 2024.
  • 4,236 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Mather Group's 13F filing for Q1 2026, filed 13 Apr 2026.