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Round Rock Advisors’s Costco COST Stock Holding History

Round Rock Advisors’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 		$296K Sell
297
-41
-12% -$40K 0.05% 264
2025
Q4 		$291K Sell
338
-41
-11% -$37.2K 0.04% 270
2025
Q3 		$351K Buy
379
+42
+12% +$40.3K 0.06% 222
2025
Q2 		$334K Sell
337
-11
-3% -$10.9K 0.06% 170
2025
Q1 		$329K Sell
348
-175
-33% -$171K 0.06% 163
2024
Q4 		$479K Buy
523
+91
+21% +$84.4K 0.1% 129
2024
Q3 		$383K Buy
432
+122
+39% +$106K 0.09% 128
2024
Q2 		$263K Sell
310
-15
-5% -$11.7K 0.06% 154
2024
Q1 		$238K Buy
325
+20
+7% +$14.3K 0.06% 172
2023
Q4 		$202K Buy
+305
New +$181K 0.05% 177

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

Round Rock Advisors's COST Position: Q1 2026 in Review

Round Rock Advisors reduced its Costco (COST) stake by 12% in Q1 2026, selling an estimated $40K and leaving 297 shares worth $296K. The position accounts for 0.05% of the portfolio, ranked #264.

Round Rock Advisors first reported a position in COST in Q4 2023 and has held it in 10 quarters since. The position peaked at $479K in Q4 2024. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Round Rock Advisors held 297 shares of Costco worth $296K as of Q1 2026.
  • Round Rock Advisors sold 41 Costco shares in Q1 2026, an estimated $40K.
  • Costco made up 0.05% of Round Rock Advisors's portfolio in Q1 2026, its #264 holding.
  • Round Rock Advisors first reported a position in Costco in Q4 2023 and has held it in 10 quarters since.
  • Round Rock Advisors's Costco position peaked at $479K in Q4 2024.
  • 4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Round Rock Advisors's 13F filing for Q1 2026, filed 15 May 2026.