Ownership history in S.A. Mason LLC · 25 quarters on record
This page tracks every 13F SEC filing in which S.A. Mason LLC reported a position in Costco Wholesale Corp (COST). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.
| Quarter | Action | Shares | Change | Chg % | % of Fund | Mkt Value | Price (EOQ) |
|---|---|---|---|---|---|---|---|
| 2025 Q4 | ADDED | 5,003 | +92 | +1.9% | 1.71% | $4.3M | $861.16 |
| 2025 Q3 | REDUCED | 4,911 | -45 | -0.9% | 2.01% | $4.5M | $923.06 |
| 2025 Q2 | REDUCED | 4,956 | -98 | -1.9% | 2.37% | $4.9M | $985.83 |
| 2025 Q1 | REDUCED | 5,054 | -28 | -0.6% | 2.53% | $4.8M | $940.62 |
| 2024 Q4 | REDUCED | 5,082 | -34 | -0.7% | 2.45% | $4.7M | $910.27 |
| 2024 Q3 | ADDED | 5,116 | +10 | +0.2% | 2.40% | $4.5M | $879.55 |
| 2024 Q2 | REDUCED | 5,106 | -110 | -2.1% | 2.47% | $4.3M | $842.10 |
| 2024 Q1 | ADDED | 5,216 | +3 | +0.1% | 2.30% | $3.8M | $724.67 |
| 2023 Q4 | REDUCED | 5,213 | -60 | -1.1% | 2.31% | $3.4M | $651.95 |
| 2023 Q3 | ADDED | 5,273 | +21 | +0.4% | 2.15% | $3.0M | $544.60 |
As of 2025 Q4 — sorted by position size