CM
COST icon

Castleark Management’s Costco COST Stock Holding History

Castleark 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
Q1 		$2.79M Hold
2,800
– – 0.09% 186
2025
Q4 		$2.41M Hold
2,800
– – 0.07% 193
2025
Q3 		$2.59M Hold
2,800
– – 0.07% 188
2025
Q2 		$2.77M Hold
2,800
– – 0.08% 166
2025
Q1 		$2.65M Hold
2,800
– – 0.09% 169
2024
Q4 		$2.57M Hold
2,800
– – 0.09% 177
2024
Q3 		$2.48M Hold
2,800
– – 0.1% 164
2024
Q2 		$2.38M Hold
2,800
– – 0.1% 163
2024
Q1 		$2.05M Hold
2,800
– – 0.09% 177
2023
Q4 		$1.85M Hold
2,800
– – 0.08% 178
2023
Q3 		$1.58M Hold
2,800
– – 0.08% 169
2023
Q2 		$1.51M Hold
2,800
– – 0.07% 173
2023
Q1 		$1.39M Hold
2,800
– – 0.07% 175
2022
Q4 		$1.28M Hold
2,800
– – 0.07% 187
2022
Q3 		$1.32M Hold
2,800
– – 0.07% 177
2022
Q2 		$1.34M Hold
2,800
– – 0.07% 179
2022
Q1 		$1.61M Hold
2,800
– – 0.07% 199
2021
Q4 		$1.59M Hold
2,800
– – 0.06% 207
2021
Q3 		$1.26M Hold
2,800
– – 0.05% 213
2021
Q2 		$1.11M Hold
2,800
– – 0.04% 215
2021
Q1 		$987K Hold
2,800
– – 0.04% 217
2020
Q4 		$1.05M Hold
2,800
– – 0.04% 234
2020
Q3 		$994K Hold
2,800
– – 0.04% 218
2020
Q2 		$849K Sell
2,800
-41,980
-94% -$12.8M 0.04% 219
2020
Q1 		$12.8M Sell
44,780
-4,460
-9% -$1.35M 0.76% 37
2019
Q4 		$14.5M Sell
49,240
-2,090
-4% -$621K 0.58% 42
2019
Q3 		$14.8M Sell
51,330
-43,374
-46% -$12.2M 0.6% 38
2019
Q2 		$25M Sell
94,704
-48,290
-34% -$12M 0.96% 26
2019
Q1 		$34.6M Sell
142,994
-10,500
-7% -$2.3M 1.3% 13
2018
Q4 		$31.3M Sell
153,494
-81,057
-35% -$18.1M 1.33% 14
2018
Q3 		$55.1M Buy
234,551
+47,920
+26% +$10.8M 1.58% 6
2018
Q2 		$39M Buy
186,631
+183,831
+6,565% +$36.3M 1.2% 13
2018
Q1 		$528K Hold
2,800
– – 0.02% 307
2017
Q4 		$521K Hold
2,800
– – 0.02% 323
2017
Q3 		$460K Sell
2,800
-34,971
-93% -$5.49M 0.01% 324
2017
Q2 		$6.04M Sell
37,771
-199,089
-84% -$34.3M 0.2% 160
2017
Q1 		$39.7M Buy
236,860
+93,251
+65% +$15.6M 1.24% 9
2016
Q4 		$23M Sell
143,609
-15,411
-10% -$2.35M 0.73% 36
2016
Q3 		$24.3M Sell
159,020
-8,160
-5% -$1.32M 0.73% 35
2016
Q2 		$26.3M Buy
167,180
+164,380
+5,871% +$24.9M 0.84% 34
2016
Q1 		$441K Hold
2,800
– – 0.01% 303
2015
Q4 		$452K Hold
2,800
– – 0.01% 312
2015
Q3 		$405K Hold
2,800
– – 0.01% 317
2015
Q2 		$378K Hold
2,800
– – 0.01% 334
2015
Q1 		$424K Hold
2,800
– – 0.01% 320
2014
Q4 		$397K Sell
2,800
-619,800
-100% -$84.2M 0.01% 297
2014
Q3 		$69.5M Buy
622,600
+619,800
+22,136% +$74.9M 1.98% 7
2014
Q2 		$322K Sell
2,800
-619,800
-100% -$71.1M 0.01% 290
2014
Q1 		$69.5M Sell
622,600
-82,873
-12% -$9.48M 1.98% 7
2013
Q4 		$84M Buy
705,473
+702,673
+25,095% +$84M 2.44% 5
2013
Q3 		$351K Sell
2,800
-635,780
-100% -$73.4M 0.01% 308
2013
Q2 		$70.6M Buy
+638,580
New +$69.8M 2.34% 8

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

Castleark Management's COST Position: Q1 2026 in Review

Castleark Management held its Costco (COST) position steady in Q1 2026 at 2,800 shares worth $2.79M. The position accounts for 0.09% of the portfolio, ranked #186.

Castleark Management first reported a position in COST in Q2 2013 and has held it in 52 quarters since. The position peaked at $84M in Q4 2013. 4,238 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Castleark Management held 2,800 shares of Costco worth $2.79M as of Q1 2026.
  • Castleark Management left its Costco share count unchanged in Q1 2026.
  • Costco made up 0.09% of Castleark Management's portfolio in Q1 2026, its #186 holding.
  • Castleark Management first reported a position in Costco in Q2 2013 and has held it in 52 quarters since.
  • Castleark Management's Costco position peaked at $84M in Q4 2013.
  • 4,238 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Castleark Management's 13F filing for Q1 2026, filed 15 May 2026.