Costco
COST
4,238 hedge funds and large institutions have $318B invested in Costco in 2026 Q1 according to their latest regulatory filings, with 320 funds opening new positions, 1,782 increasing their positions, 1,623 reducing their positions, and 124 closing their positions.
158% more first-time investments, than exits
New positions opened: 320 | Existing positions closed: 124
49% more funds holding in top 10
Funds holding in top 10: 187 → 279 (+92)
17% more capital invested
Capital invested by funds: $273B → $318B (+$45.5B)
3% more funds holding
Funds holding: 4,114 → 4,238 (+124)
10% more repeat investments, than reductions
Existing positions increased: 1,782 | Existing positions reduced: 1,623
0.57% less ownership
Funds ownership: 72.74% → 72.17% (-0.57%)
8% less call options, than puts
Call options by funds: $7.06B | Put options by funds: $7.69B
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
DAM
Diamant Asset Management
Ridgefield,
Connecticut
|
+$6.55B |
| 2 |
Capital International Investors
Los Angeles,
California
|
+$2.06B |
| 3 |
JP Morgan Chase
New York
|
+$1.03B |
| 4 |
N
Nuveen
Charlotte,
North Carolina
|
+$878M |
| 5 |
Bank of America
Charlotte,
North Carolina
|
+$754M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Corient Private Wealth
Miami,
Florida
|
-$6.07B |
| 2 |
Capital World Investors
Los Angeles,
California
|
-$1.85B |
| 3 |
VC
Vestor Capital
Chicago,
Illinois
|
-$945M |
| 4 |
Renaissance Technologies
New York
|
-$656M |
| 5 |
Invesco
Atlanta,
Georgia
|
-$639M |
COST Hedge Fund Activity: Q1 2026 in Review
4,238 of the 8,131 institutional investors tracked by Wall St. Rank reported a position in Costco (COST) for Q1 2026, worth a combined $318B — up 17% from $273B a quarter earlier.
Buyers outnumbered sellers: 320 funds opened new COST positions and 124 closed out — a net gain of 196 holders — while 1,782 added to existing stakes and 1,623 trimmed.
The largest buyer was Diamant Asset Management, adding an estimated $6.55B. The largest seller was Corient Private Wealth, cutting an estimated $6.07B.
- 4,238 institutional investors held Costco (COST) as of Q1 2026, up from 4,114 in Q4 2025.
- Funds reported $318B of Costco stock for Q1 2026, up 17% quarter-over-quarter.
- 320 funds opened new Costco positions in Q1 2026 and 124 closed out, a net change of +196 holders.
- The largest Costco buyer in Q1 2026 was Diamant Asset Management, an estimated $6.55B added.
- The largest Costco seller in Q1 2026 was Corient Private Wealth, an estimated $6.07B sold.
Based on aggregated 13F filings for Q1 2026.