Costco
COST
4,259 hedge funds and large institutions have $302B invested in Costco in 2026 Q2 according to their latest regulatory filings, with 204 funds opening new positions, 1,731 increasing their positions, 1,737 reducing their positions, and 159 closing their positions.
28% more first-time investments, than exits
New positions opened: 204 | Existing positions closed: 159
2.06% more ownership
Funds ownership: 70.7% → 72.75% (+2.1%)
0% less funds holding
Funds holding: 4,273 → 4,259 (-14)
0% less repeat investments, than reductions
Existing positions increased: 1,731 | Existing positions reduced: 1,737
3% less capital invested
Capital invested by funds: $312B → $302B (-$9.74B)
10% less call options, than puts
Call options by funds: $9.02B | Put options by funds: $9.98B
36% less funds holding in top 10
Funds holding in top 10: 281 → 181 (-100)
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
SG Americas Securities
New York
|
+$952M |
| 2 |
Marshall Wace
London,
United Kingdom
|
+$907M |
| 3 |
Royal Bank of Canada
Toronto,
Ontario, Canada
|
+$531M |
| 4 |
Invesco
Atlanta,
Georgia
|
+$359M |
| 5 |
Acadian Asset Management
Boston,
Massachusetts
|
+$325M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
BlackRock
New York
|
-$742M |
| 2 |
Fidelity Investments
Boston,
Massachusetts
|
-$553M |
| 3 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$511M |
| 4 |
Amundi
Paris,
France
|
-$413M |
| 5 |
American Century Companies
Kansas City,
Missouri
|
-$357M |
COST Hedge Fund Activity: Q2 2026 in Review
4,259 of the 8,345 institutional investors tracked by Wall St. Rank reported a position in Costco (COST) for Q2 2026, worth a combined $302B — down 3.1% from $312B a quarter earlier.
Buyers outnumbered sellers: 204 funds opened new COST positions and 159 closed out — a net gain of 45 holders — while 1,731 added to existing stakes and 1,737 trimmed.
The largest buyer was SG Americas Securities, adding an estimated $952M. The largest seller was BlackRock, cutting an estimated $742M.
- 4,259 institutional investors held Costco (COST) as of Q2 2026, down from 4,273 in Q1 2026.
- Funds reported $302B of Costco stock for Q2 2026, down 3.1% quarter-over-quarter.
- 204 funds opened new Costco positions in Q2 2026 and 159 closed out, a net change of +45 holders.
- The largest Costco buyer in Q2 2026 was SG Americas Securities, an estimated $952M added.
- The largest Costco seller in Q2 2026 was BlackRock, an estimated $742M sold.
Based on aggregated 13F filings for Q2 2026.