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Costco
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COST Hedge Fund Activity: Q2 2026 in Review

4,210 of the 8,263 institutional investors tracked by Wall St. Rank reported a position in Costco (COST) for Q2 2026, worth a combined $301B — down 5.5% from $318B a quarter earlier.

Buyers outnumbered sellers: 198 funds opened new COST positions and 157 closed out — a net gain of 41 holders — while 1,718 added to existing stakes and 1,710 trimmed.

The largest buyer was SG Americas Securities, adding an estimated $952M. The largest seller was Diamant Asset Management, cutting an estimated $6.7B.

  • 4,210 institutional investors held Costco (COST) as of Q2 2026, down from 4,256 in Q1 2026.
  • Funds reported $301B of Costco stock for Q2 2026, down 5.5% quarter-over-quarter.
  • 198 funds opened new Costco positions in Q2 2026 and 157 closed out, a net change of +41 holders.
  • The largest Costco buyer in Q2 2026 was SG Americas Securities, an estimated $952M added.
  • The largest Costco seller in Q2 2026 was Diamant Asset Management, an estimated $6.7B sold.

Based on aggregated 13F filings for Q2 2026.