S&CO INC MA — MASTERCARD INC CL A COMMON

Ownership history in S&CO INC  ·  28 quarters on record

AI Ownership Summary

S&CO INC reported MASTERCARD INC CL A COMMON (MA) in 28 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.58% in 2025 Q4. The latest visible filing shows MA at 0.58% 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 MA ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was S&CO INC's position in MASTERCARD INC CL A COMMON, 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

MA was reported at 0.58% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.58% in 2025 Q4

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.

MA stock page S&CO INC fund profile S&CO INC full holdings
How S&CO INC held MA — position size vs. price
% of Fund (quarterly)    MA price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED — — — 16,399 -172 -1.0% 0.58% $9.4M 2026-02-14 (Est.) $517.47
2025 Q3 ADDED — — — 16,571 +3,255 +24.4% 0.58% $9.4M 2025-11-06 $551.50
2025 Q2 ADDED — — — 13,316 +2,959 +28.6% 0.48% $7.5M 2025-08-07 $558.68
2025 Q1 ADDED — — — 10,357 +156 +1.5% 0.38% $5.7M 2025-05-08 $563.79
2024 Q4 ADDED — — — 10,201 +190 +1.9% 0.36% $5.4M 2025-02-07 $558.56
2024 Q3 ADDED — — — 10,011 +1,819 +22.2% 0.32% $4.9M 2024-11-07 $513.27
2024 Q2 ADDED — — — 8,192 +2,215 +37.1% 0.25% $3.6M 2024-08-08 $450.92
2024 Q1 ADDED — — — 5,977 +184 +3.2% 0.20% $2.9M 2024-05-09 $450.17
2023 Q4 UNCHANGED — — — 5,793 — 0% 0.19% $2.5M 2024-02-12 $452.72
19 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding MA

As of 2026 Q1 — sorted by position size

Mastercard Foundation Asset Management Corp 96.84% Aquamarine Zurich AG 3Y 14.77% Settian Capital LP 3Y 14.66% Katamaran Capital LLP 11.15% MFF Capital Investments Ltd 10.85% Seilern Investment Management Ltd 10.61% XXEC, Inc. 3Y 10.13% Metropolis Capital Ltd 3Y 7Y 9.82% Chapman Investment Management, LLC 3Y 8.58% Cryder Capital Partners LLP 3Y 7Y 8.02%

FAQ About S&CO INC and MA

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

How long has S&CO INC reported owning MA?

S&CO INC reported MA across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported MA position in S&CO INC's portfolio?

The largest reported portfolio weight for MA was 0.58% in 2025 Q4.

What is the latest reported MA position on this page?

The most recent filing on this page is 2025 Q4, when S&CO INC reported 16,399 shares, equal to 0.58% of portfolio, with an estimated market value of $9.4M.

What does the chart on this MA ownership page compare?

The chart compares S&CO INC's quarterly MA 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.

How well did S&CO INC time their MA position?

Based on 13F filing dates vs. subsequent MA price moves, S&CO INC correctly timed 8 out of 20 reported position changes (40%). The annualised alpha on MA relative to SPY over the holding period was -4.2%.

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