SEC 13F Intelligence

Managers / Q4 2025 · view latest →

S&CO INC

CIK 0001082461 · 50 CONGRESS STREET ROOM 800, BOSTON, MA, 02109 · 6172278660

Reported Value
$1.6B
Q4 2025
Positions
218
Filings on Record
29
2019–present window
Filed
Feb 5, 2026
original filing

Summary

S&Co Inc reported $1.6B in U.S.-listed holdings across 218 positions for Q4 2025.

Its largest position, MSFT, represents 5.2% of the portfolio.

Compared with Q3 2025, the fund opened 8 new positions and exited 12.

Portfolio Metrics

Turnover
+7.1%
vs prior filed quarter
Top-10 Concentration
+37.7%
share of reported value
Largest Position
+5.2%
Microsoft
New / Exited
8 / 12
positions this quarter

Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded, with multiple share classes and repeated sub-manager rows for the same issuer combined into one position — the same rule the holdings table uses by default. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.

Reported Value by Quarter

13F Reported Value
Q1 ’19: $898MQ1 ’19Q2 ’19: $911MQ3 ’19: $903MQ4 ’19: $958MQ1 ’20: $749MQ1 ’20Q4 ’20: $1.1BQ1 ’21: $1.2BQ2 ’21: $1.3BQ3 ’21: $1.3BQ3 ’21Q4 ’21: $1.4BQ1 ’22: $1.4BQ2 ’22: $1.2BQ3 ’22: $1.1BQ3 ’22Q4 ’22: $1.1BQ1 ’23: $1.2BQ2 ’23: $1.2BQ3 ’23: $1.2BQ3 ’23Q4 ’23: $1.3BQ1 ’24: $1.4BQ2 ’24: $1.4BQ3 ’24: $1.5BQ3 ’24Q4 ’24: $1.5BQ1 ’25: $1.5BQ2 ’25: $1.6BQ3 ’25: $1.6BQ3 ’25Q4 ’25: $1.6BQ1 ’26: $1.6Bfilingsflow.com

Portfolio Composition

By security type
Common Stock: 75.6%Other: 19.1%ADR: 2.3%ETP: 1.8%Tracking Stk: 1.1%Closed-End Fund: 0.0%
  • Common Stock · 75.6% · $1.2B
  • Other · 19.1% · $308M
  • ADR · 2.3% · $36M
  • ETP · 1.8% · $29M
  • Tracking Stk · 1.1% · $18M
  • Closed-End Fund · 0.0% · $784,000

Quarter-over-Quarter Changes full breakdown →

vs Q3 2025 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
LLYVKLIBERTY MEDIA CORP-LIBERTY LIVNEW+176.6K176.6K+$15M$15M
DIAMONDBACK ENERGY INCNEW+31.3K31.3K+$5M$5M
LLYVALIBERTY MEDIA CORP-LIBERTY LIVNEW+47.5K47.5K+$4M$4M
MONDAY.COMNEW+6.9K6.9K+$1M$1M
SEALED AIR CORPORATIONNEW+6.0K6.0K+$248,000$248,000
ORAORMAT TECHNOLOGIES INC COMNEW+2.0K2.0K+$220,000$220,000
FICOFAIR ISAAC CORP COMNEW+130130+$219,000$219,000
CFGCITIZENS FINANCIAL GROUP INC CNEW+3.5K3.5K+$204,000$204,000

Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.

Holdings — Q4 2025

215 positions (from 218 filing rows — )
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1MSFTMICROSOFT CORPhistory →COM5.18%$83M172.3K
2BRK/BBERKSHIRE HATHAWAY INC CL Bhistory →COM5.13%$83M164.2K
3EXMOCEXXON MOBIL CORPhistory →COM3.94%$63M526.9K
4AAPLAPPLE INChistory →COM3.93%$63M232.9K
5CATCATERPILLAR INC COMhistory →COM3.75%$60M105.4K
6ECLECOLAB INChistory →COM3.70%$60M227.1K
7CHDCHURCH & DWIGHT CO INChistory →COM3.36%$54M644.5K
8ADPAUTOMATIC DATA PROCESSING INChistory →COM3.24%$52M202.7K
9MERCK & CO INCCOM2.78%$45M425.5K
10AMZNAMAZON.COM INChistory →COM2.73%$44M190.6K
11GOOGALPHABET INC CLASS Chistory →COM2.30%$37M118.2K
12JNJJOHNSON & JOHNSONhistory →COM2.03%$33M158.3K
13CCJCAMECO CORPhistory →COM2.02%$33M356.3K
14SPDR GOLD TRUSTCOM1.98%$32M80.6K
15PROSYPROSUS NV -SPON ADRhistory →COM1.94%$31M2.51M
16GOOGLALPHABET INC CAP STK CL Ahistory →COM1.85%$30M95.3K
17ABTABBOTT LABShistory →COM1.76%$28M226.7K
18TMOTHERMO FISHER SCIENTIFIC INC Chistory →COM1.51%$24M42.0K
19MOSMOSAIC COMPANYhistory →COM1.46%$23M973.9K
20APDAIR PRODUCTS & CHEMICALS INC Chistory →COM1.44%$23M94.1K
21LLYELI LILLY & CO COMhistory →COM1.35%$22M20.2K
22PYPLPAYPAL HOLDINGS INChistory →COM1.25%$20M345.7K
23LLYVKLIBERTY MEDIA CORP-LIBERTY LIVCOM1.15%$19M224.1K
24ARANTERO RESOURCES CORPhistory →COM1.03%$17M479.4K
25BSXBOSTON SCIENTIFIC CORPhistory →COM1.01%$16M170.9K
26UNPUNION PACIFIC CORPhistory →COM1.00%$16M69.4K
27FULH.B. FULLER CO.history →COM0.97%$16M263.0K
28PANWPALO ALTO NETWORKS INChistory →COM0.95%$15M83.3K
29NVIDIA CORP COMCOM0.93%$15M79.9K
30SIRISIRIUS XM HOLDINGS INChistory →COM0.87%$14M701.4K
31RPRXROYALTY PHARMA PLC CL Ahistory →COM0.86%$14M358.4K
32UNITEDHEALTH GROUP INC COMCOM0.83%$13M40.7K
33PURE STORAGE, INC.COM0.79%$13M190.4K
34SPDR S&P BIOTECH ETFCOM0.77%$12M102.2K
35FWONKLIBERTY FORMULA ONE SER Chistory →COM0.75%$12M122.5K
36PEPPEPSICO INChistory →COM0.73%$12M82.3K
37GE AEROSPACE COM (NEW)COM0.72%$12M37.5K
38LINLINDE PLChistory →COM0.69%$11M26.1K
39VVISA INC. CL Ahistory →COM0.69%$11M31.5K
40MEDTRONIC PLCCOM0.65%$10M108.1K
41ROLROLLINS INC COMCOM0.58%$9M156.4K
42MAMASTERCARD INC - ACOM0.58%$9M16.4K
43AFLAFLAC INC COMCOM0.57%$9M83.6K
44APOAPOLLO ASSET MANAGEMENT INC.COM0.57%$9M62.9K
45GE VERNOVA INCCOM0.53%$9M13.1K
46ABNBAIRBNB INC ACOM0.53%$8M62.4K
47CISCO SYSTEMS INC COMCOM0.52%$8M108.5K
48LILABLIBERTY LATIN AMERICA-CL ACOM0.48%$8M1.04M
49JP MORGAN CHASE & COCOM0.48%$8M23.9K
50GFL ENVIRONMENTALCOM0.47%$8M175.6K
51ELESTEE LAUDER COMPANIES-CL ACOM0.45%$7M69.7K
52HDHOME DEPOT INC COMCOM0.45%$7M20.9K
53EDWARDS LIFESCIENCES CORPCOM0.43%$7M81.5K
54ADIANALOG DEVICES INC COMCOM0.42%$7M24.8K
55VWOVANGUARD FTSE EMERGING MARKETCOM0.39%$6M116.9K
56MSMORGAN STANLEY COMCOM0.39%$6M35.1K
57MIDDMIDDLEBY CORPORATIONCOM0.39%$6M41.8K
58FWONALIBERTY MEDIA CORP-FORMULA-ACOM0.37%$6M67.2K
59CHUBB LIMITEDCOM0.37%$6M18.9K
60LBRDKLIBERTY BROADBAND-CCOM0.36%$6M120.6K
61RTX CORP.COM0.36%$6M31.6K
62ALKERMES PLCCOM0.35%$6M201.8K
63WORKDAY INC ACOM0.35%$6M26.1K
64SYKSTRYKER CORP.COM0.33%$5M15.3K
65BIO-TECHNE CORPORATIONCOM0.33%$5M90.7K
66OKTAOKTA, INC.COM0.33%$5M60.9K
67TELTE CONNECTIVITY PLCCOM0.32%$5M22.5K
68BACBANK OF AMERICA CORPCOM0.32%$5M92.5K
69IBMINTERNATIONAL BUSINESS MACHINECOM0.31%$5M16.8K
703M COMPANY COMCOM0.31%$5M31.1K
71VIGVANGUARD DIVIDEND APPRECIATIONCOM0.30%$5M21.7K
72LIBERTY GLOBAL LTD-CCOM0.30%$5M430.5K
73DIAMONDBACK ENERGY INCCOM0.29%$5M31.3K
74CVXCHEVRON CORP NEW COMCOM0.29%$5M30.7K
75WEC ENERGY GROUP INC COMCOM0.29%$5M43.9K
76CCITIGROUP INC COM NEWCOM0.29%$5M39.6K
77EXPEDIA GROUP INC COMCOM0.29%$5M16.3K
78INTUINTUIT, INC.COM0.29%$5M6.9K
79WATWATERS CORP COMCOM0.26%$4M11.0K
80IVWISHARES S&P 500/BARRA GROWTH ICOM0.26%$4M33.7K
81RBRKRUBRIK INC ACOM0.25%$4M53.6K
82INTERACTIVE BROKERS GROUP INCCOM0.25%$4M63.1K
83META PLATFORMS INCCOM0.23%$4M5.7K
84FSLRFIRST SOLAR, INC.COM0.23%$4M14.4K
85DIGITALBRIDGE GROUP INCCOM0.23%$4M242.3K
86VANECK GOLD MINERS ETFCOM0.23%$4M42.6K
87TJXTJX COS INC NEW COMCOM0.21%$3M22.4K
88VGKVANGUARD MSCI EUROPEAN INDEX ECOM0.21%$3M40.0K
89WFCWELLS FARGO & CO COMCOM0.21%$3M35.6K
90ALNYLAM PHARMACEUTICALS INCCOM0.20%$3M8.2K
91LBRDALIBERTY BROADBAND SER ACOM0.20%$3M67.2K
92CTSHCOGNIZANT TECHNOLOGY SOLUTIONSCOM0.20%$3M38.9K
93PGPROCTER & GAMBLE COCOM0.19%$3M21.6K
94DHRDANAHER CORP COMCOM0.19%$3M13.2K
95CONSTELLATION ENERGY CORPORATICOM0.19%$3M8.5K
96ISRGINTUITIVE SURGICAL, INC.COM0.18%$3M5.1K
97WISDOMTREE JAPAN HEDGED EQUITYCOM0.18%$3M20.0K
98EATON CORP PLCCOM0.18%$3M9.0K
99RHHBYROCHE HOLDING LTD SPONSORED ADCOM0.17%$3M53.4K
100REVOLUTION MEDICINES INCCOM0.17%$3M34.2K

Filing History

QuarterReported ValuePositionsFiledTypeLinks
Q1 2026$1.6B218May 7, 202613F-HRchanges · EDGAR ↗
Q4 2025$1.6B218Feb 5, 202613F-HRchanges · EDGAR ↗
Q3 2025$1.6B222Nov 6, 202513F-HRchanges · EDGAR ↗
Q2 2025$1.6B223Aug 7, 202513F-HRchanges · EDGAR ↗
Q1 2025$1.5B217May 8, 202513F-HRchanges · EDGAR ↗
Q4 2024$1.5B210Feb 7, 202513F-HRchanges · EDGAR ↗
Q3 2024$1.5B219Nov 7, 202413F-HRchanges · EDGAR ↗
Q2 2024$1.4B217Aug 8, 202413F-HRchanges · EDGAR ↗
Q1 2024$1.4B210May 9, 202413F-HRchanges · EDGAR ↗
Q4 2023$1.3B192Feb 12, 202413F-HRchanges · EDGAR ↗
Q3 2023$1.2B184Nov 9, 202313F-HRchanges · EDGAR ↗
Q2 2023$1.2B183Aug 8, 202313F-HRchanges · EDGAR ↗
Q1 2023$1.2B180May 9, 202313F-HRchanges · EDGAR ↗
Q4 2022$1.1B179Feb 7, 202313F-HRchanges · EDGAR ↗
Q3 2022$1.1B184Nov 9, 202213F-HRchanges · EDGAR ↗
Q2 2022$1.2B187Aug 9, 202213F-HRchanges · EDGAR ↗
Q1 2022$1.4B189May 5, 202213F-HRchanges · EDGAR ↗
Q4 2021$1.4B193Feb 8, 202213F-HRchanges · EDGAR ↗
Q3 2021$1.3B187Nov 9, 202113F-HRchanges · EDGAR ↗
Q2 2021$1.3B188Jul 14, 202113F-HRchanges · EDGAR ↗
Q1 2021$1.2B184Apr 23, 202113F-HRchanges · EDGAR ↗
Q4 2020$1.1B181Jan 28, 202113F-HRchanges · EDGAR ↗
Q1 2020$749M168Apr 28, 202013F-HRchanges · EDGAR ↗
Q4 2019$958M179Jan 24, 202013F-HRchanges · EDGAR ↗
Q3 2019$903M181Oct 29, 201913F-HRchanges · EDGAR ↗
Q2 2019$911M186Jul 23, 201913F-HRchanges · EDGAR ↗
Q1 2019$898M193Apr 24, 201913F-HRchanges · EDGAR ↗

13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.