S&CO INC MSFT — D MICROSOFT CORP COM

Ownership history in S&CO INC  ·  103 quarters on record

AI Ownership Summary

S&CO INC reported D MICROSOFT CORP COM (MSFT) in 103 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 5.32% in 2025 Q3. The latest visible filing shows MSFT at 5.18% 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 MSFT 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 D MICROSOFT CORP 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

MSFT was reported at 5.18% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
5.32% in 2025 Q3

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.

MSFT stock page S&CO INC fund profile S&CO INC full holdings
How S&CO INC held MSFT — position size vs. price
% of Fund (quarterly)    MSFT 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 ADDED — — — 172,297 +4,660 +2.8% 5.18% $83.3M 2026-02-14 (Est.) $400.41
2025 Q3 ADDED — — — 167,637 +1,456 +0.9% 5.32% $86.8M 2025-11-06 $495.04
2025 Q2 ADDED — — — 166,181 +4,169 +2.6% 5.30% $82.7M 2025-08-07 $517.83
2025 Q1 ADDED — — — 162,012 +3,248 +2.0% 4.08% $60.8M 2025-05-08 $434.84
2024 Q4 ADDED — — — 158,764 +2,053 +1.3% 4.54% $66.9M 2025-02-07 $405.82
2024 Q3 ADDED — — — 156,711 +7,397 +5.0% 4.41% $67.4M 2024-11-07 $420.51
2024 Q2 ADDED — — — 149,314 +10,319 +7.4% 4.65% $66.7M 2024-08-08 $397.32
2024 Q1 REDUCED — — — 138,995 -1,188 -0.8% 4.12% $58.5M 2024-05-09 $406.09
2023 Q4 ADDED — — — 140,183 +420 +0.3% 4.04% $52.7M 2024-02-12 $408.23
94 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding MSFT

As of 2026 Q1 — sorted by position size

SANDER CAPITAL ADVISORS INC 3Y 7Y 43.08% DDD Partners, LLC 3Y 7Y 29.42% BELLEVUE ASSET MANAGEMENT, LLC 3Y 24.19% ARMSTRONG HENRY H ASSOCIATES INC 3Y 7Y 23.7% Lakeside Advisors, INC. 3Y 20.91% Union Bancaire Privee, UBP SA 20.47% Ivory Union Consulting Ltd 19.17% ONE WEALTH CAPITAL MANAGEMENT, LLC 17.26% Groupe des Assurances du Credit Mutuel 17.12% AMIRAL GESTION 16.65%

FAQ About S&CO INC and MSFT

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 MSFT?

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

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

The largest reported portfolio weight for MSFT was 5.32% in 2025 Q3.

What is the latest reported MSFT position on this page?

The most recent filing on this page is 2025 Q4, when S&CO INC reported 172,297 shares, equal to 5.18% of portfolio, with an estimated market value of $83.3M.

What does the chart on this MSFT ownership page compare?

The chart compares S&CO INC's quarterly MSFT 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 MSFT position?

Based on 13F filing dates vs. subsequent MSFT price moves, S&CO INC correctly timed 40 out of 77 reported position changes (52%). The annualised alpha on MSFT relative to SPY over the holding period was +3.5%.

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