SEC 13F Intelligence

Managers / Q1 2026

S&CO INC

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

Reported Value
$1.6B
Q1 2026
Positions
218
Filings on Record
29
2019–present window
Filed
May 7, 2026
original filing

Summary

S&Co Inc reported $1.6B in U.S.-listed holdings across 218 positions for Q1 2026.

Its largest position, EXMOC, represents 5.5% of the portfolio.

Compared with Q4 2025, the fund opened 4 new positions and exited 4.

Portfolio Metrics

Turnover
+7.4%
vs prior filed quarter
Top-10 Concentration
+38.5%
share of reported value
Largest Position
+5.5%
Exxon Mobil
New / Exited
4 / 4
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: 75.1%Other: 20.1%ADR: 2.0%ETP: 1.8%Tracking Stk: 1.0%Closed-End Fund: 0.0%
  • Common Stock · 75.1% · $1.2B
  • Other · 20.1% · $323M
  • ADR · 2.0% · $32M
  • ETP · 1.8% · $30M
  • Tracking Stk · 1.0% · $16M
  • Closed-End Fund · 0.0% · $768,000

Quarter-over-Quarter Changes full breakdown →

vs Q4 2025 (amended baseline)

IssuerMoveShare ΔShares nowValue ΔValue now
ASTRAZENECA PLCNEW+50.8K50.8K+$10M$10M
TRANSOCEAN LTDNEW+45.0K45.0K+$298,000$298,000
CSXCSX CORP COMNEW+5.4K5.4K+$221,000$221,000
CLCOLGATE-PALMOLIVE CO COMNEW+2.4K2.4K+$204,000$204,000
GCI LIBERTY, INC. CLASS CADDED+88.8K134.1K+$3M$5M
RHHBYROCHE HOLDING LTD SPONSORED ADADDED+87.1K140.6K+$4M$7M
INTUINTUIT, INC.ADDED+7.6K14.5K+$2M$6M
CANADIAN PACIFIC KANSAS CITY LSOLD OUT−14.0K0−$1M$0

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

Holdings — Q1 2026

215 positions (from 218 filing rows — )
Export to Excel
#IssuerClass% PortfolioValue ↓Shares
1EXMOCEXXON MOBIL CORPhistory →COM5.54%$89M526.0K
2BRK/BBERKSHIRE HATHAWAY INC CL Bhistory →COM4.88%$79M164.1K
3MSFTMICROSOFT CORPhistory →COM4.37%$70M190.2K
4CATCATERPILLAR INC COMhistory →COM4.34%$70M98.8K
5CHDCHURCH & DWIGHT CO INChistory →COM3.76%$61M650.2K
6ECLECOLAB INChistory →COM3.73%$60M226.1K
7AAPLAPPLE INChistory →COM3.66%$59M232.4K
8MERCK & CO INCCOM3.18%$51M425.5K
9AMZNAMAZON.COM INChistory →COM2.55%$41M197.2K
10ADPAUTOMATIC DATA PROCESSING INChistory →COM2.55%$41M202.0K
11JNJJOHNSON & JOHNSONhistory →COM2.38%$38M157.1K
12CCJCAMECO CORPhistory →COM2.21%$36M327.6K
13SPDR GOLD TRUSTCOM2.15%$35M80.6K
14GOOGALPHABET INC CLASS Chistory →COM2.10%$34M118.1K
15APDAIR PRODUCTS & CHEMICALS INC Chistory →COM1.70%$27M94.4K
16GOOGLALPHABET INC CAP STK CL Ahistory →COM1.70%$27M95.1K
17MOSMOSAIC COMPANYhistory →COM1.52%$25M963.7K
18PROSYPROSUS NV -SPON ADRhistory →COM1.39%$22M2.50M
19LLYVKLIBERTY MEDIA CORP-LIBERTY LIVCOM1.31%$21M226.0K
20ARANTERO RESOURCES CORPhistory →COM1.28%$21M487.6K
21TMOTHERMO FISHER SCIENTIFIC INC Chistory →COM1.28%$21M41.8K
22ABTABBOTT LABShistory →COM1.27%$21M199.7K
23PYPLPAYPAL HOLDINGS INChistory →COM1.25%$20M445.3K
24LLYELI LILLY & CO COMhistory →COM1.23%$20M21.5K
25RPRXROYALTY PHARMA PLC CL Ahistory →COM1.07%$17M358.4K
26UNPUNION PACIFIC CORPhistory →COM1.04%$17M69.4K
27FULH.B. FULLER CO.history →COM1.00%$16M261.2K
28PANWPALO ALTO NETWORKS INChistory →COM0.86%$14M86.9K
29SIRISIRIUS XM HOLDINGS INChistory →COM0.83%$13M581.4K
30LINLINDE PLChistory →COM0.80%$13M26.1K
31NVIDIA CORP COMCOM0.78%$13M72.2K
32SPDR S&P BIOTECH ETFCOM0.75%$12M94.3K
33PEPPEPSICO INChistory →COM0.74%$12M77.0K
34UNITEDHEALTH GROUP INC COMCOM0.74%$12M44.1K
35VVISA INC. CL Ahistory →COM0.70%$11M37.6K
36EVERPURE, INC. CLASS ACOM0.70%$11M190.4K
37MAMASTERCARD INC - Ahistory →COM0.67%$11M21.5K
38GE VERNOVA INCCOM0.66%$11M12.2K
39BSXBOSTON SCIENTIFIC CORPhistory →COM0.66%$11M169.8K
40GE AEROSPACE COM (NEW)COM0.66%$11M37.5K
41FWONKLIBERTY FORMULA ONE SER Chistory →COM0.65%$10M122.5K
42ASTRAZENECA PLCCOM0.61%$10M50.8K
43MEDTRONIC PLCCOM0.58%$9M108.1K
44AFLAFLAC INC COMCOM0.57%$9M83.6K
45ALKERMES PLCCOM0.54%$9M244.8K
46GFL ENVIRONMENTALCOM0.53%$8M203.2K
47ROLROLLINS INC COMCOM0.52%$8M156.4K
48CISCO SYSTEMS INC COMCOM0.52%$8M107.5K
49ADIANALOG DEVICES INC COMCOM0.49%$8M24.8K
50ABNBAIRBNB INC ACOM0.49%$8M62.4K
51VWOVANGUARD FTSE EMERGING MARKETCOM0.44%$7M131.6K
52JP MORGAN CHASE & COCOM0.44%$7M23.9K
53APOAPOLLO ASSET MANAGEMENT INC.COM0.43%$7M62.9K
54RHHBYROCHE HOLDING LTD SPONSORED ADCOM0.43%$7M140.6K
55HDHOME DEPOT INC COMCOM0.43%$7M20.9K
56EDWARDS LIFESCIENCES CORPCOM0.40%$7M81.5K
57DIAMONDBACK ENERGY INCCOM0.40%$6M32.2K
58INTUINTUIT, INC.COM0.39%$6M14.5K
59CVXCHEVRON CORP NEW COMCOM0.39%$6M30.0K
60CHUBB LIMITEDCOM0.38%$6M18.9K
61LBRDKLIBERTY BROADBAND-CCOM0.38%$6M121.0K
62RTX CORP.COM0.38%$6M31.4K
63LILABLIBERTY LATIN AMERICA-CL ACOM0.37%$6M682.3K
64OKTAOKTA, INC.COM0.36%$6M72.8K
65MSMORGAN STANLEY COMCOM0.35%$6M34.3K
66GCI LIBERTY, INC. CLASS CCOM0.33%$5M144.3K
67FWONALIBERTY MEDIA CORP-FORMULA-ACOM0.32%$5M66.6K
68ELESTEE LAUDER COMPANIES-CL ACOM0.32%$5M70.8K
69LIBERTY GLOBAL LTD-CCOM0.31%$5M430.5K
70SYKSTRYKER CORP.COM0.31%$5M15.3K
71BIO-TECHNE CORPORATIONCOM0.29%$5M90.7K
72WEC ENERGY GROUP INC COMCOM0.29%$5M40.7K
73TELTE CONNECTIVITY PLCCOM0.29%$5M22.4K
74VIGVANGUARD DIVIDEND APPRECIATIONCOM0.29%$5M21.6K
753M COMPANY COMCOM0.28%$5M31.1K
76BACBANK OF AMERICA CORPCOM0.28%$5M92.5K
77CCITIGROUP INC COM NEWCOM0.28%$4M39.6K
78INTERACTIVE BROKERS GROUP INCCOM0.26%$4M63.1K
79IBMINTERNATIONAL BUSINESS MACHINECOM0.25%$4M16.8K
80VANECK GOLD MINERS ETFCOM0.24%$4M42.6K
81MIDDMIDDLEBY CORPORATIONCOM0.24%$4M29.1K
82IVWISHARES S&P 500/BARRA GROWTH ICOM0.24%$4M33.7K
83EXPEDIA GROUP INC COMCOM0.23%$4M16.3K
84DIGITALBRIDGE GROUP INCCOM0.23%$4M235.6K
85TJXTJX COS INC NEW COMCOM0.22%$4M22.1K
86WATWATERS CORP COMCOM0.21%$3M11.4K
87WORKDAY INC ACOM0.21%$3M26.1K
88LBRDALIBERTY BROADBAND SER ACOM0.21%$3M66.8K
89REVOLUTION MEDICINES INCCOM0.21%$3M34.2K
90VGKVANGUARD MSCI EUROPEAN INDEX ECOM0.20%$3M40.0K
91META PLATFORMS INCCOM0.20%$3M5.7K
92EATON CORP PLCCOM0.20%$3M9.0K
93WISDOMTREE JAPAN HEDGED EQUITYCOM0.20%$3M20.0K
94PGPROCTER & GAMBLE COCOM0.18%$3M20.4K
95FSLRFIRST SOLAR, INC.COM0.18%$3M14.6K
96WFCWELLS FARGO & CO COMCOM0.18%$3M35.6K
97LBTYBLIBERTY GLOBAL LTD-ACOM0.17%$3M220.9K
98NEXTERA ENERGY INC COMCOM0.17%$3M28.7K
99ELANCO ANIMAL HEALTH, INCCOM0.17%$3M111.3K
100RBRKRUBRIK INC ACOM0.16%$3M53.6K

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 ↗.