Costco
COST
4,272 hedge funds and large institutions have $302B invested in Costco in 2026 Q2 according to their latest regulatory filings, with 205 funds opening new positions, 1,735 increasing their positions, 1,742 reducing their positions, and 160 closing their positions.
96% more capital inflows, than outflows
Capital inflows: $19.8B | Capital outflows: $10.1B
28% more first-time investments, than exits
New positions opened: 205 | Existing positions closed: 160
2.07% more ownership
Funds ownership: 70.7% → 72.77% (+2.1%)
0% less funds holding
Funds holding: 4,280 → 4,272 (-8)
0% less repeat investments, than reductions
Existing positions increased: 1,735 | Existing positions reduced: 1,742
10% less call options, than puts
Call options by funds: $9.02B | Put options by funds: $10B
35% less funds holding in top 10
Funds holding in top 10: 280 → 182 (-98)
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
4,272 of the 8,368 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: 205 funds opened new COST positions and 160 closed out — a net gain of 45 holders — while 1,735 added to existing stakes and 1,742 trimmed.
The largest buyer was SG Americas Securities, adding an estimated $952M. The largest seller was BlackRock, cutting an estimated $742M.
- 4,272 institutional investors held Costco (COST) as of Q2 2026, down from 4,280 in Q1 2026.
- Funds reported $302B of Costco stock for Q2 2026, down 3.1% quarter-over-quarter.
- 205 funds opened new Costco positions in Q2 2026 and 160 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.