Mather Group
COST icon

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
Q3 		$7.62M Sell
8,367
-749
-8% -$699K 0.06% 131
2026
Q2 		$8.53M Sell
9,116
-148
-2% -$147K 0.07% 118
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 		$9.8M 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

Emerald Advisors
Emerald Advisors Bellevue, Washington $781M AUM 4.78% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $103B AUM 40.17% 1-Year Est. Return
TD Waterhouse Canada
TD Waterhouse Canada Toronto, Ontario, Canada $38.4B AUM 30.28% 1-Year Est. Return
Cardano Risk Management
Cardano Risk Management Rotterdam, Netherlands $18.2B AUM 38.97% 1-Year Est. Return
Ninety One (UK)
Ninety One (UK) London, United Kingdom $45.5B AUM 15.2% 1-Year Est. Return
Sarasin & Partners
Sarasin & Partners London, United Kingdom $8.93B AUM 11.81% 1-Year Est. Return
Congress Asset Management
Congress Asset Management Boston, Massachusetts $15.4B AUM 30.35% 1-Year Est. Return
Fjarde Ap-fonden
Fjarde Ap-fonden Stockholm, Sweden $19.4B AUM 31.69% 1-Year Est. Return
Steginsky Capital
Steginsky Capital Port Washington, New York $610M AUM 12.34% 1-Year Est. Return
MN Services Vermogensbeheer
MN Services Vermogensbeheer The Hague, Netherlands $13.4B AUM 37.34% 1-Year Est. Return

Mather Group's COST Position: Q3 2026 in Review

Mather Group reduced its Costco (COST) stake by 8.2% in Q3 2026, selling an estimated $699K and leaving 8,367 shares worth $7.62M. The position accounts for 0.06% of the portfolio, ranked #131.

Mather Group first reported a position in COST in Q1 2020 and has held it in 27 quarters since. The position peaked at $9.8M in Q2 2024. 920 funds tracked by Wall St. Rank hold COST as of Q3 2026.

  • Mather Group held 8,367 shares of Costco worth $7.62M as of Q3 2026.
  • Mather Group sold 749 Costco shares in Q3 2026, an estimated $699K.
  • Costco made up 0.06% of Mather Group's portfolio in Q3 2026, its #131 holding.
  • Mather Group first reported a position in Costco in Q1 2020 and has held it in 27 quarters since.
  • Mather Group's Costco position peaked at $9.8M in Q2 2024.
  • 920 funds tracked by Wall St. Rank held Costco as of Q3 2026.

Based on Mather Group's 13F filing for Q3 2026, filed 14 Oct 2026.