S&CO INC

Q3 2025 13F-HR Holdings

Location
Boston, MA
Holdings as of
9/30/2025
Date filed
11/6/2025
Form type
13F-HR
Num holdings
222
Total value ($000)
$1,633,541
Net value change ($000)
+73,984 (4.7%)
New positions
7
Sold out positions
8
Turnover %
0.7%
Sector allocation + QoQ delta (equities-only)
Prev filing: 8/7/2025 Next filing: 2/5/2026 SEC filing

Snapshot: Change Analysis

Compared to Q2 2025
Methodology: sector metrics are equities-only; instrument mix chart is ex-options; options exposure is shown separately. Why this matters.
Top Adds (Value $000, Stocks/ETFs)
PROSY 9,646 36.6%
CAT 7,951 17.5%
AAPL 7,845 15.2%
GOOGL 7,580 35.8%
GOOGL 6,408 38.0%
LLY 5,849 62.0%
PYPL 5,278 31.1%
PSTG 4,995 45.6%
JNJ 4,429 17.7%
MSFT 4,167 5.0%
Top Reduces (Value $000, Stocks/ETFs)
LBRDA -7,894 -44.2%
CHD -5,541 -8.9%
MIDD -4,063 -42.2%
MOS -3,971 -9.6%
CSCO -3,953 -34.6%
ADP -3,778 -5.9%
FMC -3,158 -20.2%
AKAM -3,100 -88.3%
LBRDA -2,845 -35.7%
ABT -2,783 -8.4%
Instrument mix + QoQ Δ (ex-options)
How this table is calculated: SEC VALUE ($000) is used as reported. For derivatives (PUT/CALL/WARRANT/RIGHT), SEC value represents reported underlying exposure, not premium cash paid/received. Column % is bucket-based: non-options share is calculated inside non-option total, options share is calculated inside options total. Details.
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Instrument:
Issuer Name Ticker Sector Industry Class History Value ($000) % Shares Shares Δ Shares Δ% Value Δ ($000) Value Δ% Principal Option Type