COST — COSTCO COMPANIES INC COM

Ownership history in WINDWARD CAPITAL MANAGEMENT CO /CA  ·  79 quarters on record

AI Ownership Summary

WINDWARD CAPITAL MANAGEMENT CO /CA reported COSTCO COMPANIES INC COM (COST) in 79 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 5.83% in 2025 Q2. The latest visible filing shows COST at 4.55% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this COST ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was WINDWARD CAPITAL MANAGEMENT CO /CA's position in COSTCO COMPANIES INC COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q4

COST was reported at 4.55% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
5.83% in 2025 Q2

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q4

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

COST stock page WINDWARD CAPITAL MANAGEMENT CO /CA fund profile WINDWARD CAPITAL MANAGEMENT CO /CA full holdings
How WINDWARD CAPITAL MANAGEMENT CO /CA held COST — position size vs. price
% of Fund (quarterly)    COST price (quarter-end, indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 66,569 -2,229 -3.2% 4.55% $57.4M 2026-02-14 (Est.) $1018.48
2025 Q3 REDUCED 68,798 -602 -0.9% 5.08% $63.7M 2025-10-30 $917.63
2025 Q2 REDUCED 69,400 -431 -0.6% 5.83% $68.7M 2025-08-12 $988.50
2025 Q1 REDUCED 69,831 -2,117 -2.9% 5.70% $66.0M 2025-05-13 $994.88
2024 Q4 REDUCED 71,948 -1,685 -2.3% 5.04% $65.9M 2025-01-27 $958.93
2024 Q3 ADDED 73,633 +698 +1.0% 4.98% $65.3M 2024-11-01 $871.57
2024 Q2 REDUCED 72,935 -1,981 -2.6% 5.22% $62.0M 2024-08-06 $810.45
2024 Q1 ADDED 74,916 +194 +0.3% 4.58% $54.9M 2024-05-07 $764.15
2023 Q4 REDUCED 74,722 -170 -0.2% 4.22% $49.3M 2024-01-16 $673.10
70 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding COST

As of 2026 Q1 — sorted by position size

Norman Fields, Gottscho Capital Management, LLC 3Y 7Y 18.84% Marex Group plc 4.84% NEVILLE RODIE & SHAW INC 3Y 7Y 2.22% Hamrick Investment Counsel, llc 1.71% Somerset Trust Co 3Y 7Y 1.7% First County Bank /CT/ 1.57% Noble Wealth Management PBC 1.25% ROWLANDMILLER & PARTNERS.ADV 3Y 7Y 1.09% Coastline Trust Co 3Y 7Y 1.01% Box Hill Private Wealth LLC 0.93%

FAQ About WINDWARD CAPITAL MANAGEMENT CO /CA and COST

These are the practical questions this page is built to answer before you even open the full history table.

How long has WINDWARD CAPITAL MANAGEMENT CO /CA reported owning COST?

WINDWARD CAPITAL MANAGEMENT CO /CA reported COST across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported COST position in WINDWARD CAPITAL MANAGEMENT CO /CA's portfolio?

The largest reported portfolio weight for COST was 5.83% in 2025 Q2.

What is the latest reported COST position on this page?

The most recent filing on this page is 2025 Q4, when WINDWARD CAPITAL MANAGEMENT CO /CA reported 66,569 shares, equal to 4.55% of portfolio, with an estimated market value of $57.4M.

What does the chart on this COST ownership page compare?

The chart compares WINDWARD CAPITAL MANAGEMENT CO /CA's quarterly COST portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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