S&CO INC

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CIK 1082461

13F portfolio (2026-Q1)

$1.6B

Positions

218

Implied 1Y CAGR

modeled · as filed

Long positions in SEC Section 13(f) securities (US-listed stocks, ADRs and ETFs), largest first · Δ vs 2025-Q4. A lagged quarterly snapshot (filed ≤45 days after quarter-end); excludes shorts, options, cash, and shares listed only on non-US exchanges — foreign companies held via a US listing or ADR (e.g. Alibaba, TSMC) ARE included.

Implied return what this book implies · modeled, not advice methodology →

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As filed = each book applied at its quarter-end (what the reported book did) · As copyable = applied at its statutory 45-day filing deadline (what a 13F follower could have earned).

Computing…

Hypothetical modeled performance constructed with hindsight — not actual results, and not indicative of future results. See the Disclaimer.

Exposures · what this manager owns, by sector & size (2026-Q1)

Holdings

218

Top 5

22.9%

Top 10

38.5%

Effective N

46.7

HHI

0.021

This quarter

4 new · 0 exit →

By sector

Information Technology19.0%

Materials15.4%

Health Care14.8%

Financials12.0%

Communication Services9.0%

Industrials8.9%

Energy7.9%

Unclassified7.2%

Other5.9%

By market cap

Mega (>$200B)47.7%

Large ($10–200B)34.7%

Unknown10.1%

Mid ($2–10B)6.7%

Small ($300M–2B)0.8%

By region

North America92.1%

Other7.2%

Europe0.7%

Asia-Pacific0.1%

By industry group GICS — finer than sector

Industry group	Weight	Names
Chemicals	13.03%	9
Unclassified	12.07%	29
Pharmaceuticals & Biotechnology	11.77%	22
Oil, Gas & Consumable Fuels	7.87%	7
Technology Hardware & Equipment	7.55%	13
Software & IT Services	7.03%	8
Software	5.45%	8
Machinery	5.18%	11
Commercial Services & Supplies	4.24%	11
Media & Entertainment	3.58%	12
Specialty Retail	3.50%	6
Health Care Equipment & Supplies	2.65%	10
Metals & Mining	2.25%	3
Insurance	1.86%	8
Semiconductors & Semiconductor Equipment	1.59%	7
Electrical Equipment & Components	1.39%	5
Entertainment	1.36%	3
Banks	1.36%	8
Capital Markets	1.31%	5
Road & Rail	1.06%	2
Beverages	0.79%	2
Utilities	0.69%	6
Life Sciences Tools & Services	0.55%	5
Aerospace & Defense	0.50%	4
Distributors	0.43%	2
Transportation Infrastructure	0.23%	1
Hotels, Restaurants & Leisure	0.16%	1
Automobiles & Components	0.15%	2
Health Care Providers & Services	0.12%	2
Paper & Forest Products	0.07%	1
Household Durables	0.07%	1
Diversified Telecommunication Services	0.05%	1
Food Products	0.03%	1
Professional Services	0.03%	1
Textiles, Apparel & Luxury Goods	0.02%	1

Top holdings

#	Ticker	Name	Sector	Weight
1	XOM	EXXON MOBIL CORP	Energy	5.54%
2	BRK.B	BERKSHIRE HATHAWAY INC	Financials	4.88%
3	MSFT	MICROSOFT CORP	Information Technology	4.37%
4	CAT	CATERPILLAR INC	Industrials	4.34%
5	CHD	CHURCH & DWIGHT CO INC /DE/	Materials	3.76%
6	ECL	ECOLAB INC.	Materials	3.73%
7	AAPL	Apple Inc.	Information Technology	3.66%
8	MRK	Merck & Co., Inc.	Health Care	3.18%
9	AMZN	AMAZON COM INC	Consumer Discretionary	2.55%
10	ADP	AUTOMATIC DATA PROCESSING INC	Information Technology	2.55%

190/218 names classified · sector 92.8% of weight · industry 87.9% · mkt cap 89.9%; unclassified names shown, never dropped.

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

top 5/sector, rest → “Other” · 52 quarters

MaterialsCHD, ECL, MOS, APD, CCJ · other

Information TechnologyADP, AAPL, MSFT, TMO, GE · other

Health CareMRK, JNJ, ABT, MDT, BMY · other

FinancialsBRK.B, WFC, PYPL, APO, UNH · other

Communication ServicesLBRDK, GOOG, LILA, GOOGL, T · other

IndustrialsCAT, UNP, MMM, ABNB, MIDD · other

EnergyXOM, SLB, CVX, EQT, AR · other

Consumer DiscretionaryAMZN, HD, TEL, F, MCD · other

Consumer StaplesPEP, GIS, CVS, KO, STZ · other

UtilitiesWEC, ETR, NEE, CEG, AWK · other

Real EstateJOE, AMT

UnclassifiedPIONEER NAT RES CO, PALL CORP, LIBERTY MEDIA CORP -A, Liberty Media Corp, HILL & CO-WARGO · other

Sector is classified on each name's CURRENT fundamentals, not point-in-time — apparent sector drift can reflect the market re-rating a holding, not a manager trade. 13F is a lagged quarterly snapshot of long positions in US-listed securities only — foreign companies held via a US listing or ADR ARE included, but shares listed only on non-US exchanges (plus shorts, options and cash) are not. Latest quarter: 92.8% of the book is sector-classified (unclassified names shown, never dropped).

Style box · size × value-growth placement of the reported book (2026-Q1), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

holdings, colored by sector (155 classified)S&CO INC centroid (Large Core)

Information TechnologyMaterialsHealth CareEnergyIndustrialsFinancialsCommunication ServicesConsumer DiscretionaryConsumer StaplesUtilities

Style box summary for S&CO INC: centroid Large Core. Heaviest cells: Large Growth 21.5%, Large Core 21.4%, Large Value 13.9%.

Classified: 77.5% of book weight (155/218 names) · unclassified 22.5%: BRK.B, CCJ, GLD, PROSY, RPRX, LLYVK, XBI, FWONK, AZN, GFL +53 more. Size: cap 70/20/10 bands; style: value/growth composite on our own metrics — not Morningstar's model.

Contribution holdings-based, any period

No contribution data for this period.

Holdings· 218 positions (2026-Q1) · largest first · Δ vs 2025-Q4

#	Security	Shares	Value	Weight	Δ QoQ
1	XOMEXXON MOBIL CORP	526,003	$89M	5.5%	HOLD
2	BRK.BBERKSHIRE HATHAWAY INC DEL	164,075	$79M	4.9%	HOLD
3	MSFTMICROSOFT CORP	190,197	$70M	4.4%	ADD 10%
4	CATCATERPILLAR INC	98,827	$70M	4.3%	TRIM −6%
5	CHDCHURCH & DWIGHT CO INC	650,230	$61M	3.8%	HOLD
6	ECLECOLAB INC	226,060	$60M	3.7%	HOLD
7	AAPLAPPLE INC	232,357	$59M	3.7%	HOLD
8	MRKMERCK & CO INC	425,528	$51M	3.2%	HOLD
9	AMZNAMAZON COM INC	197,153	$41M	2.5%	ADD 3%
10	ADPAUTOMATIC DATA PROCESSING IN	201,978	$41M	2.5%	HOLD
11	JNJJOHNSON & JOHNSON	157,098	$38M	2.4%	HOLD
12	CCJCAMECO CORP	327,574	$36M	2.2%	TRIM −8%
13	GLDSPDR GOLD TR	80,565	$35M	2.2%	HOLD
14	GOOGALPHABET INC	118,113	$34M	2.1%	HOLD
15	APDAIR PRODS & CHEMS INC	94,428	$27M	1.7%	HOLD
16	GOOGLALPHABET INC	95,087	$27M	1.7%	HOLD
17	MOSMOSAIC CO NEW	963,667	$25M	1.5%	HOLD
18	PROSYPROSUS NV	2,497,466	$22M	1.4%	HOLD
19	ARANTERO RESOURCES CORP	487,604	$21M	1.3%	HOLD
20	TMOTHERMO FISHER SCIENTIFIC INC	41,827	$21M	1.3%	HOLD
21	ABTABBOTT LABS	199,720	$21M	1.3%	TRIM −12%
22	PYPLPAYPAL HLDGS INC	445,270	$20M	1.2%	ADD 29%
23	LLYELI LILLY & CO	21,519	$20M	1.2%	ADD 6%
24	RPRXROYALTY PHARMA PLC	358,377	$17M	1.1%	HOLD
25	UNPUNION PAC CORP	69,353	$17M	1.0%	HOLD
26	LLYVKLIBERTY LIVE HOLDINGS INC	176,571	$17M	1.0%	HOLD
27	FULFULLER H B CO	261,171	$16M	1.0%	HOLD
28	PANWPALO ALTO NETWORKS INC	86,925	$14M	0.9%	ADD 4%
29	SIRISIRIUSXM HOLDINGS INC	581,427	$13M	0.8%	TRIM −17%
30	LINLINDE PLC	26,052	$13M	0.8%	HOLD
31	NVDANVIDIA CORPORATION	72,156	$13M	0.8%	TRIM −10%
32	XBISPDR SERIES TRUST	94,280	$12M	0.7%	TRIM −8%
33	PEPPEPSICO INC	76,982	$12M	0.7%	TRIM −6%
34	UNHUNITEDHEALTH GROUP INC	44,072	$12M	0.7%	ADD 8%
35	VVISA INC	37,553	$11M	0.7%	ADD 19%
36	PEVERPURE INC	190,420	$11M	0.7%	HOLD
37	MAMASTERCARD INCORPORATED	21,481	$11M	0.7%	ADD 31%
38	GEVGE VERNOVA INC	12,241	$11M	0.7%	TRIM −6%
39	BSXBOSTON SCIENTIFIC CORP	169,791	$11M	0.7%	HOLD
40	GEGE AEROSPACE	37,471	$11M	0.7%	HOLD
41	FWONKLIBERTY MEDIA CORP DEL	122,528	$10M	0.6%	HOLD
42	AZNASTRAZENECA PLC	50,765	$10M	0.6%	NEW
43	MDTMEDTRONIC PLC	108,128	$9M	0.6%	HOLD
44	AFLAFLAC INC	83,570	$9M	0.6%	HOLD
45	ALKSALKERMES PLC	244,760	$9M	0.5%	ADD 21%
46	GFLGFL ENVIRONMENTAL INC	203,174	$8M	0.5%	ADD 16%
47	ROLROLLINS INC	156,393	$8M	0.5%	HOLD
48	CSCOCISCO SYS INC	107,546	$8M	0.5%	HOLD
49	ADIANALOG DEVICES INC	24,789	$8M	0.5%	HOLD
50	ABNBAIRBNB INC	62,355	$8M	0.5%	HOLD
51	VWOVANGUARD INTL EQUITY INDEX F	131,648	$7M	0.4%	ADD 13%
52	JPMJPMORGAN CHASE & CO	23,935	$7M	0.4%	HOLD
53	APOAPOLLO GLOBAL MGMT INC	62,880	$7M	0.4%	HOLD
54	RHHBYROCHE HLDGS LTD SPONSORED ADR ISIN US7711951043	140,551	$7M	0.4%	ADD 163%
55	HDHOME DEPOT INC	20,887	$7M	0.4%	HOLD
56	EWEDWARDS LIFESCIENCES CORP	81,497	$7M	0.4%	HOLD
57	FANGDIAMONDBACK ENERGY INC	32,200	$6M	0.4%	ADD 3%
58	INTUINTUIT	14,540	$6M	0.4%	ADD 110%
59	CVXCHEVRON CORP NEW	30,024	$6M	0.4%	TRIM −2%
60	CBCHUBB LIMITED	18,916	$6M	0.4%	HOLD
61	LBRDKLIBERTY BROADBAND CORP	121,034	$6M	0.4%	HOLD
62	RTXRTX CORPORATION	31,418	$6M	0.4%	HOLD
63	OKTAOKTA INC	72,779	$6M	0.4%	ADD 19%
64	MSMORGAN STANLEY	34,302	$6M	0.4%	TRIM −2%
65	LILALIBERTY LATIN AMERICA LTD	613,417	$5M	0.3%	TRIM −19%
66	FWONALIBERTY MEDIA CORP DEL	66,594	$5M	0.3%	HOLD
67	ELLAUDER ESTEE COS INC	70,764	$5M	0.3%	HOLD
68	LBTYKLIBERTY GLOBAL LTD	430,465	$5M	0.3%	HOLD
69	SYKSTRYKER CORPORATION	15,307	$5M	0.3%	HOLD
70	GLIBKGCI LIBERTY INC	134,052	$5M	0.3%	ADD 196%
71	TECHBIO-TECHNE CORP	90,695	$5M	0.3%	HOLD
72	WECWEC ENERGY GROUP INC	40,672	$5M	0.3%	TRIM −7%
73	TELTE CONNECTIVITY PLC	22,398	$5M	0.3%	HOLD
74	VIGVANGUARD SPECIALIZED FUNDS	21,632	$5M	0.3%	HOLD
75	LLYVALIBERTY LIVE HOLDINGS INC	49,387	$5M	0.3%	ADD 4%
76	MMM3M CO	31,055	$5M	0.3%	HOLD
77	BACBANK AMERICA CORP	92,484	$5M	0.3%	HOLD
78	CCITIGROUP INC	39,641	$4M	0.3%	HOLD
79	IBKRINTERACTIVE BROKERS GROUP IN	63,080	$4M	0.3%	HOLD
80	IBMINTERNATIONAL BUSINESS MACHS	16,788	$4M	0.3%	HOLD
81	GDXVANECK ETF TRUST GOLD MINERS ETF	42,589	$4M	0.2%	HOLD
82	MIDDMIDDLEBY CORP	29,100	$4M	0.2%	TRIM −30%
83	IVWISHARES TR	33,695	$4M	0.2%	HOLD
84	EXPEEXPEDIA GROUP INC	16,285	$4M	0.2%	HOLD
85	DBRGDIGITALBRIDGE GROUP INC	235,600	$4M	0.2%	TRIM −3%
86	TJXTJX COS INC NEW	22,106	$4M	0.2%	HOLD
87	WATWATERS CORP	11,417	$3M	0.2%	ADD 4%
88	WDAYWORKDAY INC	26,112	$3M	0.2%	HOLD
89	LBRDALIBERTY BROADBAND CORP	66,827	$3M	0.2%	HOLD
90	RVMDREVOLUTION MEDICINES INC	34,171	$3M	0.2%	HOLD
91	VGKVANGUARD INTL EQUITY INDEX F	40,000	$3M	0.2%	HOLD
92	METAMETA PLATFORMS INC	5,725	$3M	0.2%	HOLD
93	ETNEATON CORP PLC	8,976	$3M	0.2%	HOLD
94	DXJWISDOMTREE TR	20,000	$3M	0.2%	HOLD
95	PGPROCTER AND GAMBLE CO	20,418	$3M	0.2%	TRIM −6%
96	FSLRFIRST SOLAR INC	14,596	$3M	0.2%	HOLD
97	WFCWELLS FARGO CO NEW	35,649	$3M	0.2%	HOLD
98	LBTYALIBERTY GLOBAL LTD	220,943	$3M	0.2%	HOLD
99	NEENEXTERA ENERGY INC	28,720	$3M	0.2%	HOLD
100	ELANELANCO ANIMAL HEALTH INC	111,284	$3M	0.2%	HOLD
101	RBRKRUBRIK INC.	53,612	$3M	0.2%	HOLD
102	MCDMCDONALDS CORP	8,445	$3M	0.2%	HOLD
103	COSTCOSTCO WHSL CORP NEW	2,575	$3M	0.2%	HOLD
104	DHRDANAHER CORP DEL	13,189	$3M	0.2%	HOLD
105	ALNYALNYLAM PHARMACEUTICALS INC	7,400	$2M	0.2%	TRIM −10%
106	RRCRANGE RES CORP	53,500	$2M	0.1%	HOLD
107	CEGCONSTELLATION ENERGY CORP	8,620	$2M	0.1%	HOLD
108	PPLIIAC INC	59,425	$2M	0.1%	TRIM −14%
109	ISRGINTUITIVE SURGICAL INC	5,121	$2M	0.1%	HOLD
110	VEUVANGUARD INTL EQUITY INDEX F	31,256	$2M	0.1%	HOLD
111	TSLATESLA INC	6,111	$2M	0.1%	ADD 19%
112	FERGFERGUSON ENTERPRISES INC	9,643	$2M	0.1%	HOLD
113	ILMNILLUMINA INC	18,000	$2M	0.1%	HOLD
114	AAGILENT TECHNOLOGIES INC	17,674	$2M	0.1%	HOLD
115	AXPAMERICAN EXPRESS CO	6,386	$2M	0.1%	HOLD
116	VRTXVERTEX PHARMACEUTICALS INC	4,103	$2M	0.1%	HOLD
117	PENPENUMBRA INC	5,500	$2M	0.1%	HOLD
118	CTSHCOGNIZANT TECHNOLOGY SOLUTIO	28,935	$2M	0.1%	TRIM −26%
119	LECOLINCOLN ELEC HLDGS INC	7,000	$2M	0.1%	HOLD
120	TVTXTRAVERE THERAPEUTICS INC	56,000	$2M	0.1%	HOLD
121	CWCURTISS WRIGHT CORP	2,372	$2M	0.1%	HOLD
122	EOGEOG RES INC	10,835	$2M	0.1%	ADD 29%
123	LOWLOWES COS INC	6,503	$2M	0.1%	HOLD
124	IAUISHARES GOLD TR	17,174	$2M	0.1%	HOLD
125	SCJISHARES INC	15,000	$1M	0.1%	HOLD
126	PFEPFIZER INC	50,218	$1M	0.1%	TRIM −6%
127	INSMINSMED INC	8,300	$1M	0.1%	HOLD
128	PODDINSULET CORP	6,385	$1M	0.1%	HOLD
129	HONHONEYWELL INTL INC	5,642	$1M	0.1%	HOLD
130	HUMHUMANA INC	7,351	$1M	0.1%	TRIM −9%
131	ABBVABBVIE INC	5,857	$1M	0.1%	TRIM −4%
132	KMBKIMBERLY-CLARK CORP	11,914	$1M	0.1%	HOLD
133	SONYSONY GROUP CORP	55,000	$1M	0.1%	HOLD
134	HCAHCA HEALTHCARE INC	2,298	$1M	0.1%	HOLD
135	AGCOAGCO CORP	9,325	$1M	0.1%	HOLD
136	IWDISHARES TR	5,050	$1M	0.1%	HOLD
137	MRVLMARVELL TECHNOLOGY INC	10,573	$1M	0.1%	HOLD
138	ETRENTERGY CORP NEW	8,966	$1M	0.1%	HOLD
139	RBLXROBLOX CORP	16,940	$958,000	0.1%	HOLD
140	ADBEADOBE INC	3,887	$944,000	0.1%	HOLD
141	WMTWALMART INC	7,512	$933,000	0.1%	HOLD
142	VTIVANGUARD INDEX FDS	2,882	$924,000	0.1%	HOLD
143	NBIXNEUROCRINE BIOSCIENCES INC	7,000	$922,000	0.1%	HOLD
144	IVEISHARES TR	4,350	$918,000	0.1%	HOLD
145	PRVAPRIVIA HEALTH GROUP INC	42,000	$863,000	0.1%	HOLD
146	UTHRUnited Therapeutics Corp.	1,431	$848,000	0.1%	HOLD
147	ALCALCON AG	11,196	$843,000	0.1%	HOLD
148	TAT&T INC	29,034	$841,000	0.1%	HOLD
149	BATRKATLANTA BRAVES HLDGS INC	19,565	$835,000	0.1%	TRIM −2%
150	IWRISHARES TR	8,344	$811,000	0.1%	HOLD
151	MNDYMONDAY COM LTD	11,615	$802,000	0.0%	ADD 69%
152	TTTRANE TECHNOLOGIES PLC	1,880	$783,000	0.0%	HOLD
153	KOCOCA COLA CO	10,236	$778,000	0.0%	HOLD
154	CETCENTRAL SECS CORP	15,469	$768,000	0.0%	HOLD
155	MTDMETTLER TOLEDO INTERNATIONAL	600	$756,000	0.0%	HOLD
156	SXISTANDEX INTL CORP	2,685	$684,000	0.0%	HOLD
157	IWFISHARES TR	1,542	$657,000	0.0%	HOLD
158	KMPRKEMPER CORP	19,870	$607,000	0.0%	HOLD
159	LILAKLIBERTY LATIN AMERICA LTD	68,906	$607,000	0.0%	TRIM −76%
160	VWDRYVESTAS WIND SYS A/S UTD KINGDOM UNSPONSORED ADR REPSTG 1 ORD SHS	60,950	$595,000	0.0%	HOLD
161	PNCPNC FINL SVCS GROUP INC	2,800	$582,000	0.0%	HOLD
162	BENFRANKLIN RESOURCES INC	23,245	$549,000	0.0%	TRIM −50%
163	BEBLOOM ENERGY CORP	4,000	$541,000	0.0%	TRIM −20%
164	CRMSALESFORCE INC	2,839	$529,000	0.0%	HOLD
165	RAREULTRAGENYX PHARMACEUTICAL IN	25,255	$529,000	0.0%	HOLD
166	ZTSZOETIS INC	4,410	$521,000	0.0%	TRIM −9%
167	INTCINTEL CORP	11,734	$517,000	0.0%	HOLD
168	IQVIQVIA HLDGS INC	3,000	$511,000	0.0%	HOLD
169	GISGENERAL MILLS INC	13,646	$507,000	0.0%	TRIM −13%
170	DEDEERE & CO	860	$484,000	0.0%	HOLD
171	BAHBOOZ ALLEN HAMILTON HLDG COR	5,860	$457,000	0.0%	HOLD
172	IWOISHARES TR	1,329	$417,000	0.0%	HOLD
173	VEAVANGUARD TAX-MANAGED FDS	6,150	$394,000	0.0%	HOLD
174	TXNTEXAS INSTRS INC	2,000	$388,000	0.0%	TRIM −3%
175	AVGOBROADCOM INC	1,245	$385,000	0.0%	HOLD
176	GLIBAGCI LIBERTY INC	10,254	$377,000	0.0%	HOLD
177	EBCEASTERN BANKSHARES INC	18,305	$358,000	0.0%	HOLD
178	ZWSZURN ELKAY WATER SOLNS CORP	8,000	$358,000	0.0%	HOLD
179	BABOEING CO	1,790	$356,000	0.0%	HOLD
180	GLWCORNING INC	2,550	$346,000	0.0%	HOLD
181	MRSHMARSH & MCLENNAN COS INC	2,000	$346,000	0.0%	HOLD
182	CLHCLEAN HARBORS INC	1,200	$344,000	0.0%	HOLD
183	GEHCGE HEALTHCARE TECHNOLOGIES I	4,820	$343,000	0.0%	TRIM −8%
184	RSGREPUBLIC SVCS INC	1,550	$339,000	0.0%	TRIM −11%
185	NOCNORTHROP GRUMMAN CORP	492	$335,000	0.0%	HOLD
186	BEPBROOKFIELD RENEWABLE PARTNER	10,000	$326,000	0.0%	HOLD
187	GNRCGENERAC HLDGS INC	1,602	$312,000	0.0%	ADD 7%
188	RRXREGAL REXNORD CORPORATION	1,600	$299,000	0.0%	HOLD
189	EMREMERSON ELEC CO	2,280	$298,000	0.0%	HOLD
190	RIGTRANSOCEAN LTD	45,000	$298,000	0.0%	NEW
191	ITRIITRON INC	3,300	$295,000	0.0%	HOLD
192	ORCLORACLE CORP	2,000	$294,000	0.0%	ADD 19%
193	AMGNAMGEN INC	834	$293,000	0.0%	HOLD
194	MPMP MATERIALS CORP	6,000	$289,000	0.0%	HOLD
195	AYIACUITY INC	1,000	$280,000	0.0%	HOLD
196	IDXXIDEXX LABS INC	500	$280,000	0.0%	HOLD
197	CTASCINTAS CORP	1,600	$270,000	0.0%	HOLD
198	APPAPPLOVIN CORP	675	$268,000	0.0%	HOLD
199	NVZMYNOVOZYMES A/S-UNSPONS ADR	4,500	$265,000	0.0%	HOLD
200	CAECAE INC	10,000	$260,000	0.0%	HOLD

showing the top 200 by weight

Position trends· top 15 holdings · shares held over 6 quarters

green added · red trimmed

Security

2024-Q4

2025-Q1

2025-Q2

2025-Q3

2025-Q4

2026-Q1

Latest value

XOMEXXON MOBIL CORP

551K

550K

548K

536K

527K

526K

$89M

BRK.BBERKSHIRE HATHAWAY INC DEL

166K

165K

164K

$79M

MSFTMICROSOFT CORP

159K

162K

166K

168K

172K

190K

$70M

CATCATERPILLAR INC

116K

115K

117K

112K

105K

99K

$70M

CHDCHURCH & DWIGHT CO INC

651K

652K

650K

649K

644K

650K

$61M

ECLECOLAB INC

231K

229K

227K

226K

$60M

AAPLAPPLE INC

273K

245K

251K

233K

232K

$59M

MRKMERCK & CO INC

403K

427K

426K

423K

426K

$51M

AMZNAMAZON COM INC

153K

163K

172K

189K

191K

197K

$41M

ADPAUTOMATIC DATA PROCESSING IN

206K

208K

206K

203K

202K

$41M

JNJJOHNSON & JOHNSON

175K

166K

164K

159K

158K

157K

$38M

CCJCAMECO CORP

565K

577K

572K

517K

356K

328K

$36M

GLDSPDR GOLD TR

81K

$35M

GOOGALPHABET INC

139K

121K

119K

118K

$34M

APDAIR PRODS & CHEMS INC

95K

94K

$27M

Shares reported each quarter by the largest current holdings. Green = added vs the prior filing of that name, red = trimmed, grey = roughly held; a dash is a quarter with no 13F on file (a gap is skipped, not read as an exit). 13F is filed up to 45 days after quarter-end. Up to 40 quarters (10 years) available — use the selector above.

☆S&CO INC

Implied return what this book implies · modeled, not advice methodology →

Exposures · what this manager owns, by sector & size (2026-Q1)

By sector

By market cap

By region

By industry group GICS — finer than sector

Top holdings

Sector allocation over time · how the GICS mix & top names shifted quarter by quarter

Style box · size × value-growth placement of the reported book (2026-Q1), classified on current fundamentals (not point-in-time) — load it into PORT to overlay your own portfolio

Contribution holdings-based, any period

Holdings· 218 positions (2026-Q1) · largest first · Δ vs 2025-Q4

Position trends· top 15 holdings · shares held over 6 quarters

Related· where to look next

S&CO INC