Prota Financial
COST icon

Prota Financial’s Costco COST Stock Holding History

Prota Financial’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 		$609K Buy
666
+8
+1% +$7.47K 0.39% 45
2026
Q2 		$608K Buy
658
+12
+2% +$12K 0.4% 43
2026
Q1 		$643K Buy
646
+79
+14% +$77K 0.47% 27
2025
Q4 		$489K Buy
+567
New +$514K 0.35% 44

Other funds holding COST

Emerald Advisors
Emerald Advisors Bellevue, Washington $781M AUM 4.78% 1-Year Est. Return
Parnassus Investments
Parnassus Investments San Francisco, California $33.8B AUM 31.08% 1-Year Est. Return
Assenagon Asset Management
Assenagon Asset Management Senningerberg, Luxembourg $103B AUM 40.17% 1-Year Est. Return
New York State Teachers Retirement System (NYSTRS)
New York State Teachers Retirement System (NYSTRS) Albany, New York $52.9B AUM 36.03% 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 30.39% 1-Year Est. Return
Robeco Institutional Asset Management
Robeco Institutional Asset Management Rotterdam, Netherlands $83.2B AUM 35.34% 1-Year Est. Return

Prota Financial's COST Position: Q3 2026 in Review

Prota Financial increased its Costco (COST) stake by 1.2% in Q3 2026, buying an estimated $7.47K and bringing the position to 666 shares worth $609K. The position accounts for 0.39% of the portfolio, ranked #45.

Prota Financial first reported a position in COST in Q4 2025 and has held it in 4 quarters since. The position peaked at $643K in Q1 2026. 1,274 funds tracked by Wall St. Rank hold COST as of Q3 2026.

  • Prota Financial held 666 shares of Costco worth $609K as of Q3 2026.
  • Prota Financial bought 8 Costco shares in Q3 2026, an estimated $7.47K.
  • Costco made up 0.39% of Prota Financial's portfolio in Q3 2026, its #45 holding.
  • Prota Financial first reported a position in Costco in Q4 2025 and has held it in 4 quarters since.
  • Prota Financial's Costco position peaked at $643K in Q1 2026.
  • 1,274 funds tracked by Wall St. Rank held Costco as of Q3 2026.

Based on Prota Financial's 13F filing for Q3 2026, filed 8 Oct 2026.