§ 13F · FUND PROFILE
S&CO INC.
Institutional filer · behavioral pattern: Other. Summary pending.
AUM · $1.6T (13F)Positions · 223Turnover · — · Q4Filed · Feb 5, 2026
CONCENTRATION
—
Top 10 holdings
NEW BUYS
0
+$25.2B deployed
EXITS
0
No exits
SECTOR SHIFT
—
No prior quarter data
3YR HIT RATE
—
Top-5 overlap
§ 01 · TOP HOLDINGS
The book · Q4 2025
FILED FEB 5, 2026
| # | Ticker | Name | Shares | $ value | % port | Δ Q4 |
|---|---|---|---|---|---|---|
| 1 | MSFT | MICROSOFT CORP | 172K | $83.3B | 5.2% | +3% |
| 2 | BRK/B | BERKSHIRE HATHAWAY INC CL B | 164K | $82.5B | 5.1% | ±0% |
| 3 | XOM | EXXON MOBIL CORP | 527K | $63.4B | 3.9% | −2% |
| 4 | AAPL | APPLE INC | 233K | $63.3B | 3.9% | ±0% |
| 5 | CAT | CATERPILLAR INC COM | 105K | $60.4B | 3.8% | −6% |
| 6 | ECL | ECOLAB INC | 227K | $59.6B | 3.7% | −1% |
| 7 | CHD | CHURCH & DWIGHT CO INC | 644K | $54.0B | 3.4% | −1% |
| 8 | ADP | AUTOMATIC DATA PROCESSING INC | 203K | $52.2B | 3.2% | −2% |
| 9 | MRK | MERCK & CO INC | 426K | $44.8B | 2.8% | +1% |
| 10 | AMZN | AMAZON.COM INC | 191K | $44.0B | 2.7% | +1% |
§ 02 · SECTOR ALLOCATION
Where the money is
Sector data pending
§ 03 · THE S&CO SIGNAL
AC read
S&CO INC is a Other fund managing $1559.6 trillion in assets. The fund runs a broad portfolio of 223 positions.
Read the full dossier →§ 04 · FILING HISTORY
Q-by-Q deltas
1 FILINGS
Q4 2025
Steady book
+0 buys · −0 exits · 0 changed
Q3 2025
Steady book
+0 buys · −0 exits · 0 changed
Q2 2025
Steady book
+0 buys · −0 exits · 0 changed
Q1 2025
Steady book
+0 buys · −0 exits · 0 changed