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Winthrop Capital Management’s Costco COST Stock Holding History

Winthrop Capital 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 		$1.25M Buy
1,252
+44
+4% +$42.9K 0.32% 63
2025
Q4 		$1.04M Sell
1,208
-166
-12% -$150K 0.24% 67
2025
Q3 		$1.27M Buy
1,374
+81
+6% +$77.6K 0.31% 58
2025
Q2 		$1.28M Sell
1,293
-181
-12% -$180K 0.32% 62
2025
Q1 		$1.39M Sell
1,474
-155
-10% -$151K 0.38% 56
2024
Q4 		$1.5M Buy
1,629
+193
+13% +$179K 0.4% 55
2024
Q3 		$1.27M Sell
1,436
-104
-7% -$90.3K 0.61% 31
2024
Q2 		$1.31M Buy
1,540
+10
+0.7% +$7.8K 0.65% 29
2024
Q1 		$1.12M Buy
1,530
+13
+0.9% +$9.28K 0.52% 36
2023
Q4 		$1M Buy
+1,517
New +$899K 0.33% 68

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 $147M AUM 25.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

Winthrop Capital Management's COST Position: Q1 2026 in Review

Winthrop Capital Management increased its Costco (COST) stake by 3.6% in Q1 2026, buying an estimated $42.9K and bringing the position to 1,252 shares worth $1.25M. The position accounts for 0.32% of the portfolio, ranked #63.

Winthrop Capital Management first reported a position in COST in Q4 2023 and has held it in 10 quarters since. The position peaked at $1.5M in Q4 2024. 4,239 funds tracked by Wall St. Rank hold COST as of Q1 2026.

  • Winthrop Capital Management held 1,252 shares of Costco worth $1.25M as of Q1 2026.
  • Winthrop Capital Management bought 44 Costco shares in Q1 2026, an estimated $42.9K.
  • Costco made up 0.32% of Winthrop Capital Management's portfolio in Q1 2026, its #63 holding.
  • Winthrop Capital Management first reported a position in Costco in Q4 2023 and has held it in 10 quarters since.
  • Winthrop Capital Management's Costco position peaked at $1.5M in Q4 2024.
  • 4,239 funds tracked by Wall St. Rank held Costco as of Q1 2026.

Based on Winthrop Capital Management's 13F filing for Q1 2026, filed 28 Apr 2026.