COST
COSTCO WHOLESALE CORPORATION
Closing price as of Apr 1, 2026
18 superinvestors own COST
Based on latest 13F filings — data is 45–90 days delayed
| Investor | Weight | Activity |
|---|---|---|
| Kenneth Fisher | 1.09% | Added |
| Chuck Akre | 0.72% | Added |
| Ruane Cunniff | 0.66% | New |
| Warren Buffett | 0.65% | Held |
| Viking Global Investors | 0.58% | Added |
| Thomas Gayner | 0.55% | Held |
| Torray Funds | 0.09% | Held |
| First Eagle Investment Management | 0.07% | Reduced |
| David Katz | 0.05% | Reduced |
| Thomas Russo | 0.05% | Held |
| Mairs & Power | 0.03% | Added |
| Lee Ainslie | 0.03% | New |
| Christopher Davis | 0.01% | Held |
| Meridian / ArrowMark | 0.01% | Held |
| Francois Rochon | 0.01% | Held |
| Bill Nygren | 0.00% | Reduced |
| Dodge & Cox | 0.00% | Held |
| Jensen Investment Management | 0.00% | Held |
Recent insider activity — COST
Open-market purchases (P) and sales (S) from SEC Form 4 filings · last 12 months
No open-market insider trades in the last 12 months.
Form 4 filings for option exercises and other transaction types are excluded.
Congressional trades — COST
STOCK Act disclosures · last 12 months
Congressional trade data coming soon.
We are sourcing STOCK Act disclosures and will display them here shortly.
Learn more
What Is SEC Form 4?
Understand the insider trade filings behind COST activity.
What Is a 13F Filing?
How superinvestors disclose their quarterly holdings.
Insider Cluster Buying
Why multiple insiders buying together is a strong signal.
Superinvestor Consensus
The most widely held stocks across all tracked institutions.