S&CO INC

CIK

1082461

Location

BOSTON, MA

Portfolio Value

Mid $1,455,194,926

Diversification

Diversified

Filing Date

Global Rank

#1,188 / 8,232 ▲ 112

Top Industry

Drug Manufacturers - General 8.6%

3Y Alpha vs SPY

-9.1%

Period ended 3 months ago

Filed May 7, 2026 · 39d

25 quarters · since Mar 2020

Clone Performance

Jun 2023–Jun 2026 · vs SPY

Hypothetical growth of cloning every reported 13F position and rebalancing on each filing, indexed to the same start.

Cloned portfolio

+37.7%

SPY

+74.2%

Annualised alpha

-9.1%

Max drawdown

−15.8%

Estimate. 13F holdings are quarter-lagged and long-only, so the clone rebalances about 45 days after each period end — when the filing becomes public — and excludes options and short positions. Past performance does not predict future results.

Portfolio Concentration

187 positions · as of Mar 31, 2026 · Δ vs Dec 31, 2025

Top Position

6.1%

+0.4 pts

Top 5

25.4%

+1.0 pts

Top 10

42.7%

+0.8 pts

HHI

251

Diversified+10

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Healthcare	18.9%	$274,607,476	42
Technology	18.0%	$262,535,846	27
Financial Services	12.4%	$181,158,049	23
Energy	11.2%	$162,524,891	9
Industrials	10.3%	$149,649,556	35
Basic Materials	9.7%	$141,454,504	6
Consumer Defensive	6.0%	$86,801,548	10
Consumer Cyclical	5.4%	$78,542,974	12
Communication Services	4.8%	$70,159,276	14
Unclassified	2.5%	$36,180,372	2
Utilities	0.8%	$11,580,434	7

Last Quarter's Activity

Export CSV

Mar 31, 2026 vs Dec 31, 2025

Added To

Positions the filer increased

25 positions

Ticker	Company	Δ Shares	Shares	Value
PYPL	PayPal Holdings, Inc.	+99,615	445,270	$20,139,562
ALKS	Alkermes plc.	+43,000	244,760	$8,654,713
GFL	GFL Environmental Inc.	+27,575	203,174	$8,476,419
MSFT	Microsoft Corp	+17,900	190,197	$70,405,223
OKTA	Okta, Inc.	+11,861	72,779	$5,728,435
AR	ANTERO RESOURCES Corp	+8,205	487,604	$20,693,913
INTU	Intuit Inc.	+7,602	14,540	$6,286,805
AMZN	Amazon Com Inc	+6,580	197,153	$41,061,055
V	Visa Inc.	+6,055	37,553	$11,350,018
CHD	Church & Dwight Co Inc /De/	+5,742	650,230	$60,679,463
MA	Mastercard Inc	+5,082	21,481	$10,733,196
MNDY	monday.com Ltd.	+4,740	11,615	$802,712
PANW	Palo Alto Networks Inc	+3,579	86,925	$13,935,816
UNH	Unitedhealth Group Inc	+3,385	44,072	$11,925,442
EOG	Eog Resources Inc	+2,415	10,835	$1,566,415
LLYVA	Liberty Live Holdings, Inc.	+1,840	49,387	$4,525,824
LLY	ELI LILLY & Co	+1,310	21,519	$19,792,530
EL	Estee Lauder Companies Inc	+1,096	70,764	$5,078,732
ERII	Energy Recovery, Inc.	+1,000	13,000	$130,910
TSLA	Tesla, Inc.	+996	6,111	$2,271,764
FANG	Diamondback Energy, Inc.	+900	32,200	$6,368,838
RRC	Range Resources Corp	+500	53,500	$2,417,130
WAT	Waters Corp /De/	+463	11,417	$3,399,982
APD	Air Products & Chemicals, Inc.	+361	94,428	$27,430,389
ORCL	Oracle Corp	+325	2,000	$294,220
No positions match the current search.

Trimmed

Positions the filer reduced

25 positions

Ticker	Company	Δ Shares	Shares	Value
LILA	Liberty Latin America Ltd.	−145,159	613,417	$5,299,922
SIRI	Sirius Xm Holdings Inc.	−120,015	581,427	$13,419,335
CCJ	Cameco Corp	−28,752	327,574	$35,577,812
ABT	Abbott Laboratories	−26,990	199,720	$20,505,252
BEN	Franklin Resources Inc	−23,250	23,245	$549,046
MIDD	MIDDLEBY Corp	−12,700	29,100	$3,858,078
MOS	Mosaic Co	−10,205	963,667	$24,573,508
IAC	IAC Inc.	−10,000	59,425	$2,378,782
CTSH	Cognizant Technology Solutions Corp	−10,000	28,935	$1,775,162
NVDA	Nvidia Corp	−7,788	72,156	$12,584,006
DBRG	DigitalBridge Group, Inc.	−6,700	235,600	$3,632,952
CAT	Caterpillar Inc	−6,569	98,827	$70,014,976
PEP	Pepsico Inc	−5,300	76,982	$11,954,534
PFE	Pfizer Inc	−3,270	50,218	$1,410,121
WEC	Wec Energy Group, Inc.	−3,235	40,672	$4,708,597
CHTR	Charter Communications, Inc. /Mo/	−3,015	1,128	$243,512
GIS	General Mills Inc	−2,000	13,646	$507,904
FUL	Fuller H B Co	−1,785	261,171	$16,109,027
LBTYA	Liberty Global Ltd.	−1,470	220,943	$2,671,200
PG	PROCTER & GAMBLE Co	−1,211	20,418	$2,949,175
JNJ	Johnson & Johnson	−1,200	157,098	$38,401,035
BSX	Boston Scientific Corp	−1,090	169,791	$10,654,385
ECL	Ecolab Inc.	−1,010	226,060	$60,136,481
BE	Bloom Energy Corp	−1,000	4,000	$541,960
CSCO	Cisco Systems, Inc.	−992	107,546	$8,344,494
No positions match the current search.

New Positions

Positions the filer opened this quarter

4 positions

Ticker	Company	Shares	Value
AZN	Astrazeneca PLC	50,765	$10,011,873
RIG	Transocean Ltd.	45,000	$298,350
CSX	Csx Corp	5,400	$221,670
CL	Colgate Palmolive Co	2,400	$204,552
No positions match the current search.

Sold Out

Positions the filer fully exited

5 positions

Ticker	Company	Shares	Value
CP	Canadian Pacific Kansas City Ltd/Cn	14,000	$1,030,820
UTHR	UNITED THERAPEUTICS Corp	1,431	$697,254
FICO	Fair Isaac Corp	130	$219,780
XYL	Xylem Inc.	1,600	$217,888
LKQ	Lkq Corp	7,200	$217,440
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

187 positions · $1,455,194,926 total · as of Mar 31, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Healthcare Industrials Technology Utilities

Showing 1–50 of 187 positions by value · page 1 of 4

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
ERII	Energy Recovery, Inc. Industrials	Added	13,000	+1,000	$130,910	−19.1%	0.01%
CLNE	Clean Energy Fuels Corp. Energy	Held	60,000	0	$148,800	+18.1%	0.01%
ENVX	Enovix Corp Industrials	Held	35,000	0	$181,300	−29.1%	0.01%
DASH	DoorDash, Inc. Consumer Cyclical	Held	1,341	0	$201,351	−33.7%	0.01%
CL	Colgate Palmolive Co Consumer Defensive	NEW	2,400	NEW	$204,552	NEW	0.01%
APTV	Aptiv PLC Consumer Cyclical	Held	3,000	0	$208,320	−8.7%	0.01%
CFG	Citizens Financial Group Inc/Ri Financial Services	Held	3,500	0	$209,895	+2.7%	0.01%
VLTO	Veralto Corp Industrials	Added	2,433	+200	$215,125	−3.4%	0.01%
CI	Cigna Group Healthcare	Held	824	0	$219,802	−3.1%	0.02%
CSX	Csx Corp Industrials	NEW	5,400	NEW	$221,670	NEW	0.02%
ORA	Ormat Technologies, Inc. Utilities	Held	2,000	0	$223,840	+1.3%	0.02%
PFG	Principal Financial Group Inc Financial Services	Held	2,500	0	$225,275	+2.2%	0.02%
AES	Aes Corp Utilities	Held	17,000	0	$239,530	−1.7%	0.02%
CHTR	Charter Communications, Inc. /Mo/ Communication Services	Reduced	1,128	-3,015	$243,512	−71.8%	0.02%
SEE	SEALED AIR CORP/DE Consumer Cyclical	Held	6,000	0	$252,300	+1.5%	0.02%
WM	Waste Management Inc Industrials	Held	1,100	0	$252,769	+4.6%	0.02%
CAE	Cae Inc Industrials	Held	10,000	0	$260,500	−14.4%	0.02%
APP	AppLovin Corp Communication Services	Held	675	0	$268,650	−40.9%	0.02%
CTAS	Cintas Corp Industrials	Held	1,600	0	$270,624	−10.1%	0.02%
AYI	Acuity Inc. (De) Industrials	Held	1,000	0	$280,220	−22.2%	0.02%
IDXX	Idexx Laboratories Inc /De Healthcare	Held	500	0	$280,945	−16.9%	0.02%
MP	MP Materials Corp. / DE Basic Materials	Held	6,000	0	$289,560	−4.5%	0.02%
AMGN	Amgen Inc Healthcare	Held	834	0	$293,442	+7.5%	0.02%
ORCL	Oracle Corp Technology	Added	2,000	+325	$294,220	−9.9%	0.02%
ITRI	Itron, Inc. Technology	Held	3,300	0	$295,779	−3.5%	0.02%
RIG	Transocean Ltd. Energy	NEW	45,000	NEW	$298,350	NEW	0.02%
EMR	Emerson Electric Co Industrials	Held	2,280	0	$298,725	−1.3%	0.02%
RRX	Regal Rexnord Corp Industrials	Held	1,600	0	$299,616	+33.5%	0.02%
GNRC	Generac Holdings Inc. Industrials	Added	1,602	+100	$312,918	+52.8%	0.02%
BEP	Brookfield Renewable Partners L.P. Utilities	Held	10,000	0	$326,400	+21.0%	0.02%
NOC	Northrop Grumman Corp /De/ Industrials	Held	492	0	$335,662	+19.6%	0.02%
RSG	Republic Services, Inc. Industrials	Reduced	1,550	-200	$339,481	−8.5%	0.02%
GEHC	GE HealthCare Technologies Inc. Healthcare	Reduced	4,820	-398	$343,087	−19.8%	0.02%
CLH	Clean Harbors Inc Industrials	Held	1,200	0	$344,076	+22.3%	0.02%
GLW	Corning Inc /Ny Technology	Held	2,550	0	$346,723	+55.3%	0.02%
MRSH	Marsh & Mclennan Companies, Inc. Financial Services	Held	2,000	0	$346,900	−6.5%	0.02%
BA	Boeing Co Industrials	Held	1,790	0	$356,263	−8.3%	0.02%
EBC	Eastern Bankshares, Inc. Financial Services	Held	18,305	0	$358,045	+6.1%	0.02%
ZWS	Zurn Elkay Water Solutions Corp Industrials	Held	8,000	0	$358,720	−3.5%	0.02%
GLIBA	GCI Liberty, Inc. Communication Services	Added	10,254	+5	$377,859	−0.0%	0.03%
AVGO	Broadcom Inc. Technology	Held	1,245	0	$385,339	−10.6%	0.03%
TXN	Texas Instruments Inc Technology	Reduced	2,000	-70	$388,280	+8.1%	0.03%
BAH	Booz Allen Hamilton Holding Corp Industrials	Held	5,860	0	$457,255	−7.5%	0.03%
DE	Deere & Co Industrials	Held	860	0	$484,438	+21.0%	0.03%
GIS	General Mills Inc Consumer Defensive	Reduced	13,646	-2,000	$507,904	−30.2%	0.03%
IQV	Iqvia Holdings Inc. Healthcare	Held	3,000	0	$511,620	−24.3%	0.04%
INTC	Intel Corp Technology	Held	11,734	0	$517,821	+19.6%	0.04%
ZTS	Zoetis Inc. Healthcare	Reduced	4,410	-414	$521,306	−14.1%	0.04%
RARE	Ultragenyx Pharmaceutical Inc. Healthcare	Held	25,255	0	$529,092	−8.9%	0.04%
CRM	Salesforce, Inc. Technology	Held	2,839	0	$529,956	−29.5%	0.04%