Costco
COST
4,256 hedge funds and large institutions have $318B invested in Costco in 2026 Q1 according to their latest regulatory filings, with 323 funds opening new positions, 1,785 increasing their positions, 1,633 reducing their positions, and 124 closing their positions.
160% more first-time investments, than exits
New positions opened: 323 | Existing positions closed: 124
50% more funds holding in top 10
Funds holding in top 10: 187 → 280 (+93)
17% more capital invested
Capital invested by funds: $273B → $318B (+$45.5B)
3% more funds holding
Funds holding: 4,123 → 4,256 (+133)
9% more repeat investments, than reductions
Existing positions increased: 1,785 | Existing positions reduced: 1,633
0.55% less ownership
Funds ownership: 72.74% → 72.19% (-0.55%)
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 |
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
4,256 of the 8,172 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: 323 funds opened new COST positions and 124 closed out — a net gain of 199 holders — while 1,785 added to existing stakes and 1,633 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.
- 4,256 institutional investors held Costco (COST) as of Q1 2026, up from 4,123 in Q4 2025.
- Funds reported $318B of Costco stock for Q1 2026, up 17% quarter-over-quarter.
- 323 funds opened new Costco positions in Q1 2026 and 124 closed out, a net change of +199 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.