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Mattern Wealth Management’s Costco COST Stock Holding History

Mattern Wealth Management’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 		$5.85M Buy
6,258
+53
+0.9% +$52.8K 0.96% 22
2026
Q1 		$6.18M Buy
6,205
+130
+2% +$127K 1.21% 20
2025
Q4 		$5.24M Buy
6,075
+149
+3% +$135K 1.01% 22
2025
Q3 		$5.49M Sell
5,926
-160
-3% -$153K 1.1% 21
2025
Q2 		$6.02M Buy
6,086
+167
+3% +$166K 1.25% 18
2025
Q1 		$5.6M Buy
5,919
+179
+3% +$175K 1.24% 17
2024
Q4 		$5.26M Sell
5,740
-321
-5% -$298K 1.16% 19
2024
Q3 		$5.37M Buy
6,061
+105
+2% +$91.1K 1.18% 17
2024
Q2 		$5.06M Sell
5,956
-231
-4% -$180K 1.22% 18
2024
Q1 		$4.53M Sell
6,187
-22
-0.4% -$15.7K 1.1% 21
2023
Q4 		$4.1M Buy
6,209
+174
+3% +$103K 1.05% 24
2023
Q3 		$3.41M Buy
6,035
+337
+6% +$186K 1% 23
2023
Q2 		$3.07M Buy
5,698
+562
+11% +$284K 0.9% 26
2023
Q1 		$2.55M Sell
5,136
-186
-3% -$91.2K 0.84% 33
2022
Q4 		$2.43M Buy
5,322
+161
+3% +$78.7K 0.98% 32
2022
Q3 		$2.44M Buy
5,161
+54
+1% +$28.1K 0.98% 27
2022
Q2 		$2.45M Buy
5,107
+109
+2% +$55.3K 0.96% 28
2022
Q1 		$2.88M Buy
4,998
+7
+0.1% +$3.67K 0.94% 31
2021
Q4 		$2.83M Sell
4,991
-216
-4% -$111K 0.83% 34
2021
Q3 		$2.34M Buy
5,207
+103
+2% +$45.3K 0.79% 34
2021
Q2 		$2.1M Sell
5,104
-143
-3% -$54.1K 0.67% 43
2021
Q1 		$1.85M Buy
5,247
+2,476
+89% +$862K 0.65% 44
2020
Q4 		$1.04M Buy
2,771
+94
+4% +$35.1K 0.39% 74
2020
Q3 		$950K Sell
2,677
-10
-0.4% -$3.36K 0.41% 72
2020
Q2 		$815K Buy
2,687
+77
+3% +$23.4K 0.4% 76
2020
Q1 		$744K Buy
2,610
+295
+13% +$89.5K 0.54% 61
2019
Q4 		$680K Buy
+2,315
New +$688K 0.41% 78

Other funds holding COST

Sumitomo Mitsui Trust Group
Sumitomo Mitsui Trust Group Minato-Ku, Tokyo, Japan $175B AUM 40.63% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $80.2B AUM 50.57% 1-Year Est. Return
Swedbank
Swedbank Stockholm, Sweden $116B AUM 46.87% 1-Year Est. Return
Parnassus Investments
Parnassus Investments San Francisco, California $37.4B AUM 35.42% 1-Year Est. Return
EA
Emerald Advisors Bellevue, Washington $796M AUM 2.51% 1-Year Est. Return
New York State Common Retirement Fund
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
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $81.4B AUM 40.71% 1-Year Est. Return
Commonwealth Equity Services
Commonwealth Equity Services Waltham, Massachusetts $79.5B AUM 27.1% 1-Year Est. Return

Mattern Wealth Management's COST Position: Q2 2026 in Review

Mattern Wealth Management increased its Costco (COST) stake by 0.85% in Q2 2026, buying an estimated $52.8K and bringing the position to 6,258 shares worth $5.85M. The position accounts for 0.96% of the portfolio, ranked #22.

Mattern Wealth Management first reported a position in COST in Q4 2019 and has held it in 27 quarters since. The position peaked at $6.18M in Q1 2026. 2,087 funds tracked by Wall St. Rank hold COST as of Q2 2026.

  • Mattern Wealth Management held 6,258 shares of Costco worth $5.85M as of Q2 2026.
  • Mattern Wealth Management bought 53 Costco shares in Q2 2026, an estimated $52.8K.
  • Costco made up 0.96% of Mattern Wealth Management's portfolio in Q2 2026, its #22 holding.
  • Mattern Wealth Management first reported a position in Costco in Q4 2019 and has held it in 27 quarters since.
  • Mattern Wealth Management's Costco position peaked at $6.18M in Q1 2026.
  • 2,087 funds tracked by Wall St. Rank held Costco as of Q2 2026.

Based on Mattern Wealth Management's 13F filing for Q2 2026, filed 23 Jul 2026.