COST
Costco Wholesale Corporation · Consumer Defensive · Discount Stores
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2026
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q3 2026 | 4 | 0 | 1.14M | $1.01B | n/a | n/a |
| Q2 2026 | 184 | +1 | 256.45M | $240.04B | +5 | −3 |
| Q1 2026 | 185 | -1 | 248.86M | $247.50B | +3 | −5 |
| Q4 2025 | 185 | +1 | 272.68M | $230.44B | +2 | n/a |
| Q3 2025 | 26 | +1 | 146.13M | $135.22B | +1 | −1 |
| Q2 2025 | 23 | 0 | 133.88M | $132.48B | +1 | −1 |
| Q1 2025 | 20 | +1 | 45.79M | $43.27B | +1 | n/a |
| Q4 2024 | 19 | -1 | 44.19M | $40.47B | n/a | −1 |
| Q3 2024 | 19 | +1 | 25.55M | $22.62B | +1 | n/a |
| Q2 2024 | 18 | n/a | 26.66M | $22.64B | n/a | n/a |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | 501.31K | -62.6% | $456.36M | 0.5% | ▼ Trim | 4 | SEC ↗ |
| 2 | TD Waterhouse Canada Inc. | 300.75K | -9.7% | $275.32M | 0.7% | ▼ Trim | 4 | SEC ↗ |
| 3 | Ninety One UK Ltd | 206.16K | -32.6% | $187.67M | 0.4% | ▼ Trim | 3 | SEC ↗ |
| 4 | Wealth Enhancement Advisory… | 136.59K | +16.7% | $95.50M | 0.1% | ▲ Add | 4 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| No new tracked buyers this quarter. |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 4,198 holders, 306.58M shares, $287.82B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 1.10K sh · $1.05M
Officer · 2.20K sh · $2.02M
Officer · 801 sh · $733,328
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology