SEC 13F Intelligence

Managers / Q3 2025 · view latest →

S&CO INC

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

Reported Value
$1.6B
Q3 2025
Positions
222
Filings on Record
29
2019–present window
Filed
Nov 6, 2025
original filing

Summary

S&Co Inc reported $1.6B in U.S.-listed holdings across 222 positions for Q3 2025.

Its largest position, MSFT, represents 5.3% of the portfolio.

Compared with Q2 2025, the fund opened 7 new positions and exited 8.

Portfolio Metrics

Turnover
+4.1%
vs prior filed quarter
Top-10 Concentration
+37.2%
share of reported value
Largest Position
+5.3%
Microsoft
New / Exited
7 / 8
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: 75.4%Other: 17.8%Tracking Stk: 2.5%ADR: 2.5%ETP: 1.8%Closed-End Fund: 0.0%
  • Common Stock · 75.4% · $1.2B
  • Other · 17.8% · $291M
  • Tracking Stk · 2.5% · $41M
  • ADR · 2.5% · $41M
  • ETP · 1.8% · $29M
  • Closed-End Fund · 0.0% · $757,000

Quarter-over-Quarter Changes full breakdown →

vs Q2 2025 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
SUNRISE COMMUNICAT-CL ANEW+47.5K47.5K+$3M$3M
GCI LIBERTY, INC. CLASS CNEW+30.1K30.1K+$1M$1M
ORACLE CORP COMNEW+1.6K1.6K+$442,000$442,000
GCI LIBERTY, INC. CLASS ANEW+10.3K10.3K+$387,000$387,000
AOSA. O. SMITHNEW+3.0K3.0K+$219,000$219,000
GLWCORNING INC COMNEW+2.5K2.5K+$209,000$209,000
PRINCIPAL FINANCIAL GROUP INCNEW+2.5K2.5K+$207,000$207,000
RBRKRUBRIK INC AADDED+27.2K53.6K+$2M$4M

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

Holdings — Q3 2025

219 positions (from 222 filing rows — )
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1MSFTMICROSOFT CORPhistory →COM5.32%$87M167.6K
2BRK/BBERKSHIRE HATHAWAY INC CL Bhistory →COM5.08%$83M165.0K
3ECLECOLAB INChistory →COM3.83%$63M228.6K
4ADPAUTOMATIC DATA PROCESSING INChistory →COM3.70%$60M205.9K
5EXMOCEXXON MOBIL CORPhistory →COM3.70%$60M535.7K
6AAPLAPPLE INChistory →COM3.63%$59M233.1K
7CHDCHURCH & DWIGHT CO INChistory →COM3.48%$57M649.4K
8CATCATERPILLAR INC COMhistory →COM3.27%$53M112.1K
9CCJCAMECO CORPhistory →COM2.66%$43M517.5K
10AMZNAMAZON.COM INChistory →COM2.54%$42M189.1K
11MOSMOSAIC COMPANYhistory →COM2.28%$37M1.08M
12PROSYPROSUS NV -SPON ADRhistory →COM2.20%$36M2.56M
13MERCK & CO INCCOM2.17%$35M422.5K
14ABTABBOTT LABShistory →COM1.87%$31M228.0K
15JNJJOHNSON & JOHNSONhistory →COM1.80%$29M158.8K
16GOOGALPHABET INC CLASS Chistory →COM1.76%$29M118.1K
17SPDR GOLD TRUSTCOM1.75%$29M80.6K
18APDAIR PRODUCTS & CHEMICALS INC Chistory →COM1.58%$26M94.8K
19GOOGLALPHABET INC CAP STK CL Ahistory →COM1.42%$23M95.7K
20PYPLPAYPAL HOLDINGS INChistory →COM1.36%$22M331.5K
21LIBERTY MEDIA CORP-LIBERTY LIVCOM1.33%$22M225.5K
22TMOTHERMO FISHER SCIENTIFIC INC Chistory →COM1.26%$21M42.4K
23PANWPALO ALTO NETWORKS INChistory →COM1.04%$17M83.3K
24BSXBOSTON SCIENTIFIC CORPhistory →COM1.04%$17M173.3K
25SIRISIRIUS XM HOLDINGS INChistory →COM1.01%$17M711.5K
26UNPUNION PACIFIC CORPhistory →COM1.01%$17M69.9K
27PURE STORAGE, INC.COM0.98%$16M190.4K
28FULH.B. FULLER CO.history →COM0.96%$16M264.0K
29ARANTERO RESOURCES CORPhistory →COM0.95%$16M464.4K
30LLYELI LILLY & CO COMhistory →COM0.94%$15M20.0K
31UNITEDHEALTH GROUP INC COMCOM0.88%$14M41.5K
32NVIDIA CORP COMCOM0.82%$13M71.5K
33FWONKLIBERTY FORMULA ONE SER Chistory →COM0.79%$13M122.9K
34RPRXROYALTY PHARMA PLC CL Ahistory →COM0.77%$13M358.2K
35FMCFMC CORPhistory →COM0.76%$12M370.8K
36LINLINDE PLChistory →COM0.75%$12M25.9K
37LILABLIBERTY LATIN AMERICA-CL ACOM0.75%$12M1.47M
38PEPPEPSICO INChistory →COM0.72%$12M83.4K
39GE AEROSPACE COM (NEW)COM0.69%$11M37.6K
40SPDR S&P BIOTECH ETFCOM0.64%$11M105.1K
41MEDTRONIC PLCCOM0.63%$10M108.4K
42LBRDKLIBERTY BROADBAND-CCOM0.61%$10M157.1K
43APOAPOLLO ASSET MANAGEMENT INC.COM0.59%$10M72.9K
44MAMASTERCARD INC - ACOM0.58%$9M16.6K
45AFLAFLAC INC COMCOM0.57%$9M83.6K
46ROLROLLINS INC COMCOM0.56%$9M156.4K
47HDHOME DEPOT INC COMCOM0.52%$8M20.8K
48GFL ENVIRONMENTALCOM0.51%$8M175.6K
49GE VERNOVA INCCOM0.50%$8M13.2K
50VVISA INC. CL ACOM0.49%$8M23.3K
51ABNBAIRBNB INC ACOM0.46%$8M62.4K
52JP MORGAN CHASE & COCOM0.46%$8M24.0K
53CISCO SYSTEMS INC COMCOM0.46%$7M109.1K
54FWONALIBERTY MEDIA CORP-FORMULA-ACOM0.39%$6M67.4K
55EDWARDS LIFESCIENCES CORPCOM0.39%$6M81.5K
56VWOVANGUARD FTSE EMERGING MARKETCOM0.39%$6M116.1K
57WORKDAY INC ACOM0.38%$6M26.0K
58ELESTEE LAUDER COMPANIES-CL ACOM0.38%$6M70.2K
59ADIANALOG DEVICES INC COMCOM0.37%$6M24.8K
60ALKERMES PLCCOM0.37%$6M201.2K
61SYKSTRYKER CORP.COM0.35%$6M15.4K
62MSMORGAN STANLEY COMCOM0.34%$6M35.2K
63MIDDMIDDLEBY CORPORATIONCOM0.34%$6M41.8K
64OKTAOKTA, INC.COM0.33%$5M59.5K
65CHUBB LIMITEDCOM0.33%$5M18.9K
66RTX CORP.COM0.32%$5M31.6K
67TELTE CONNECTIVITY PLCCOM0.32%$5M23.6K
68LBRDALIBERTY BROADBAND SER ACOM0.31%$5M80.8K
69BIO-TECHNE CORPORATIONCOM0.31%$5M91.1K
70LIBERTY GLOBAL LTD-CCOM0.31%$5M430.5K
71WEC ENERGY GROUP INC COMCOM0.31%$5M43.9K
72VIGVANGUARD DIVIDEND APPRECIATIONCOM0.30%$5M23.1K
73OXYOCCIDENTAL PETROLEUM CORPCOM0.30%$5M105.1K
74CVXCHEVRON CORP NEW COMCOM0.30%$5M31.7K
753M COMPANY COMCOM0.30%$5M31.1K
76BACBANK OF AMERICA CORPCOM0.29%$5M92.5K
77IBMINTERNATIONAL BUSINESS MACHINECOM0.29%$5M16.8K
78RBRKRUBRIK INC ACOM0.27%$4M53.6K
79INTERACTIVE BROKERS GROUP INCCOM0.27%$4M62.9K
80META PLATFORMS INCCOM0.26%$4M5.7K
81IVWISHARES S&P 500/BARRA GROWTH ICOM0.25%$4M33.7K
82CCITIGROUP INC COM NEWCOM0.25%$4M39.6K
83INTUINTUIT, INC.COM0.24%$4M5.8K
84CHTRCHARTER COMMUNICATIONS INCCOM0.24%$4M14.2K
85ALNYLAM PHARMACEUTICALS INCCOM0.23%$4M8.2K
86EXPEDIA GROUP INC COMCOM0.23%$4M17.3K
87WFCWELLS FARGO & CO COMCOM0.22%$4M43.6K
88TJXTJX COS INC NEW COMCOM0.21%$3M24.1K
89EATON CORP PLCCOM0.20%$3M8.9K
90PGPROCTER & GAMBLE COCOM0.20%$3M21.6K
91WATWATERS CORP COMCOM0.20%$3M11.1K
92VANECK GOLD MINERS ETFCOM0.20%$3M43.2K
93VGKVANGUARD MSCI EUROPEAN INDEX ECOM0.20%$3M40.0K
94FSLRFIRST SOLAR, INC.COM0.19%$3M14.4K
95ELANCO ANIMAL HEALTH, INCCOM0.17%$3M141.3K
96DIGITALBRIDGE GROUP INCCOM0.17%$3M242.3K
97SUNRISE COMMUNICAT-CL ACOM0.17%$3M47.5K
98CONSTELLATION ENERGY CORPORATICOM0.17%$3M8.5K
99CTSHCOGNIZANT TECHNOLOGY SOLUTIONSCOM0.16%$3M39.7K
100LBTYBLIBERTY GLOBAL LTD-ACOM0.16%$3M230.2K

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 ↗.