Costco Wholesale Corporation (COST) Insider, 13F Hedge Fund & Politician Buy/Sell Thermometer
Costco Wholesale Corporation (COST) earns a Roarable Rating of A- (Buy) with 83/100 RQD Confidence. High-quality cash engine (13% profit margin, 42% return on capital) with steady institutional support. Even if the broader market gets choppy, the company’s underlying cash engine and big-money support put the odds in buyers’ favor.
COST Smart-Money Thermometer: HEAVY INSIDER & 13F ACCUMULATION
Wide-Open SEC Form 4, 13F & Congressional Disclosure Ledger (COST)
| Filer / Title | Category | Side | Shares | $ Value | Filed |
|---|---|---|---|---|---|
| Wilcox William RichardSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 1,100 | $1.1M | 2026-10-14 |
| Renaissance Technologies13F-HR Medallion Quantitative Manager // CIK 0001037389 | HEDGE_FUND | BUY | 195,000 | $185.6M | 2026-07-20 |
| Denman Kenneth DSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 885 | $847.3K | 2026-06-25 |
| Pershing Square (Bill Ackman)13F-HR Concentrated Activist Manager // CIK 0001336528 | HEDGE_FUND | BUY | 240,000 | $243.6M | 2026-04-19 |
| Berkshire Hathaway (Warren Buffett)13F-HR Value Conglomerate & Float Manager // CIK 0001067983 | HEDGE_FUND | BUY | 320,000 | $314.8M | 2026-04-18 |
| Frates CatonSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 700 | $695.1K | 2026-04-01 |
| Sen. Tommy TubervilleU.S. Senate Armed Services Committee (AL) // STOCK Act PTR | POLITICIAN | BUY | 420 | $419.2K | 2026-03-19 |
| Adamo ClaudineSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 730 | $732.2K | 2026-03-11 |
| Jones Teresa A.SEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 850 | $838.3K | 2026-01-23 |
| Citadel Advisors (Ken Griffin)13F-HR Multi-Strategy Institutional Manager // CIK 0001423053 | HEDGE_FUND | SELL | 165,000 | $141.0M | 2026-01-21 |
| Decker Susan LSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 458 | $437.4K | 2026-01-20 |
| Klauer James CSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 1,500 | $1.4M | 2026-01-15 |
| Miller Russell DSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 1,500 | $1.4M | 2026-01-12 |
| Polit JavierSEC Form 4 Open-Market Officer / Director | INSIDER | SELL | 2,607 | $2.3M | 2025-12-31 |
| Rep. Nancy PelosiU.S. House Representative (CA-11) // STOCK Act PTR | POLITICIAN | BUY | 1,000 | $899.0K | 2025-12-07 |
Cash-Fortress Compounders: Collecting Safe Yield & Upside in COST & Top A-Rated Leaders
- ✓12-month Bull/Base/Bear fair-value walkthrough on COST and its top sector rival
- ✓The Top 5 Roarable A-Rated cash compounders with heavy executive & 13F accumulation
- ✓Includes free daily Morning Market Weather & signal upgrade/downgrade dispatch
COST Dilution Monitor, Expectations Hurdle, Butterfly Connections & Policy Exposure
SEC XBRL FY2025 → FY2026: Disciplined near-zero share dilution.
vs. +10.1% actual YoY revenue growth (assuming 9.25% cost of equity & 16.5x terminal multiple).
No active Ellis Vennor swing setup published on COST today. View full Setup Ledger →
No direct multi-tier Butterfly edges indexed yet for COST. Explore sector supply chains on /butterfly.
COST Investor FAQ & Complete 8-Part Research Index
100% OPEN ACCESS • SEC EDGAR × CBOE × FREDAre COST insiders and hedge funds buying or selling?
Roarable's SEC Form 4 and 13F Whale Thermometer currently classifies COST leadership and institutional positioning as: HEAVY INSIDER & 13F ACCUMULATION.