UOC
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UBS O'Connor’s Costco COST Stock Holding History

UBS O'Connor’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
2025
Q3 		– Sell
-1,000
Closed -$990K – 324
2025
Q2 		$990K Hold
1,000
– – 0.03% 225
2025
Q1 		$946K Buy
+1,000
New +$975K 0.02% 190
2017
Q2 		– Sell
-50,000
Closed -$8.38M – 402
2017
Q1 		$8.38M Buy
+50,000
New +$8.38M 0.14% 152
2016
Q4 		– Sell
-10,415
Closed -$1.59M – 412
2016
Q3 		$1.59M Sell
10,415
-12,135
-54% -$1.96M 0.02% 325
2016
Q2 		$3.54M Buy
+22,550
New +$3.41M 0.08% 213
2014
Q1 		– Sell
-221,651
Closed -$26.4M – 453
2013
Q4 		$26.4M Buy
+221,651
New +$26.5M 0.48% 62
2013
Q3 		– Sell
-352,264
Closed -$39M – 449
2013
Q2 		$39M Buy
+352,264
New +$38.5M 0.73% 36

Other funds holding COST

Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Northern Trust
Northern Trust Chicago, Illinois $860B AUM 41.15% 1-Year Est. Return
Invesco
Invesco Atlanta, Georgia $1.26T AUM 61.52% 1-Year Est. Return
Royal Bank of Canada
Royal Bank of Canada Toronto, Ontario, Canada $672B AUM 33.48% 1-Year Est. Return

UBS O'Connor's COST Position: Q3 2025 in Review

UBS O'Connor sold out of Costco (COST) in Q3 2025, closing a stake of 1,000 shares — an estimated $990K sold.

UBS O'Connor first reported a position in COST in Q2 2013 and held it in 7 quarters. The position peaked at $39M in Q2 2013. 3,939 funds tracked by Wall St. Rank hold COST as of Q3 2025.

  • UBS O'Connor reported no remaining Costco position as of Q3 2025 after selling out during the quarter.
  • UBS O'Connor sold 1,000 Costco shares in Q3 2025, an estimated $990K.
  • UBS O'Connor first reported a position in Costco in Q2 2013 and held it in 7 quarters.
  • UBS O'Connor's Costco position peaked at $39M in Q2 2013.
  • 3,939 funds tracked by Wall St. Rank held Costco as of Q3 2025.

Based on UBS O'Connor's 13F filing for Q3 2025, filed 14 Nov 2025.