S&CO INC

CIK

1082461

Location

BOSTON, MA

Portfolio Value

Mid $1,364,316,040

Diversification

Diversified

Filing Date

Global Rank

#1,478 / 8,603 ▲ 21 · as of Mar 2026

Top Industry

Drug Manufacturers - General 9.2%

3Y Alpha vs SPY

-8.0%

Period ended 3 months ago

Filed May 7, 2026 · 2mo

25 quarters · since Mar 2020

Clone Performance

Jul 2023–Jul 2026 · vs SPY

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

Cloned portfolio

+42.8%

SPY

+76.0%

Annualised alpha

-8.1%

Max drawdown

−16.1%

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

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

Top Position

5.8%

−0.3 pts

Top 5

24.9%

−0.3 pts

Top 10

41.8%

+0.1 pts

HHI

243

Diversified−1

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Mar 31, 2026

Sector	% Portfolio	Value	Positions
Healthcare	20.1%	$274,607,476	42
Technology	19.2%	$262,535,846	27
Financial Services	13.3%	$181,158,049	23
Industrials	11.0%	$149,711,748	35
Basic Materials	10.4%	$141,454,504	6
Consumer Defensive	6.4%	$86,801,548	10
Consumer Cyclical	5.8%	$78,542,974	12
Energy	5.4%	$73,283,223	8
Communication Services	5.0%	$68,459,866	14
Unclassified	2.7%	$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	$3,600,512
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
CTSH	Cognizant Technology Solutions Corp	−10,000	28,935	$1,775,162
PPLI	People Inc	−10,000	59,425	$2,378,782
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

186 positions · $1,364,316,040 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 186 positions by value · page 1 of 4

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
BRK-B	Berkshire Hathaway Inc Financial Services	Reduced	164,075	-155	$78,624,740	−4.8%	5.76%
MSFT	Microsoft Corp Technology	Added	190,197	+17,900	$70,405,223	−15.5%	5.16%
CAT	Caterpillar Inc Industrials	Reduced	98,827	-6,569	$70,014,976	+16.0%	5.13%
CHD	Church & Dwight Co Inc /De/ Consumer Defensive	Added	650,230	+5,742	$60,679,463	+12.3%	4.45%
ECL	Ecolab Inc. Basic Materials	Reduced	226,060	-1,010	$60,136,481	+0.9%	4.41%
AAPL	Apple Inc. Technology	Reduced	232,357	-592	$58,969,883	−6.9%	4.32%
MRK	Merck & Co., Inc. Healthcare	Reduced	425,528	-3	$51,186,763	+14.3%	3.75%
AMZN	Amazon Com Inc Consumer Cyclical	Added	197,153	+6,580	$41,061,055	−6.7%	3.01%
ADP	Automatic Data Processing Inc Technology	Reduced	201,978	-765	$41,037,890	−21.3%	3.01%
JNJ	Johnson & Johnson Healthcare	Reduced	157,098	-1,200	$38,401,035	+17.2%	2.81%
CCJ	Cameco Corp Energy	Reduced	327,574	-28,752	$35,577,812	+9.1%	2.61%
GLD	Spdr Gold Trust	Held	80,565	0	$34,666,313	+8.6%	2.54%
APD	Air Products & Chemicals, Inc. Basic Materials	Added	94,428	+361	$27,430,389	+18.0%	2.01%
GOOGL	Alphabet Inc. Communication Services	Reduced	95,087	-220	$27,343,217	−8.3%	2.00%
MOS	Mosaic Co Basic Materials	Reduced	963,667	-10,205	$24,573,508	+4.7%	1.80%
AR	ANTERO RESOURCES Corp Energy	Added	487,604	+8,205	$20,693,913	+25.3%	1.52%
TMO	Thermo Fisher Scientific Inc. Healthcare	Reduced	41,827	-152	$20,559,225	−15.5%	1.51%
ABT	Abbott Laboratories Healthcare	Reduced	199,720	-26,990	$20,505,252	−27.8%	1.50%
PYPL	PayPal Holdings, Inc. Financial Services	Added	445,270	+99,615	$20,139,562	−0.2%	1.48%
LLY	ELI LILLY & Co Healthcare	Added	21,519	+1,310	$19,792,530	−8.9%	1.45%
RPRX	Royalty Pharma plc Healthcare	Held	358,377	0	$17,191,344	+24.1%	1.26%
UNP	Union Pacific Corp Industrials	Held	69,353	0	$16,826,424	+4.9%	1.23%
FUL	Fuller H B Co Basic Materials	Reduced	261,171	-1,785	$16,109,027	+3.0%	1.18%
PANW	Palo Alto Networks Inc Technology	Added	86,925	+3,579	$13,935,816	−9.2%	1.02%
SIRI	Sirius Xm Holdings Inc. Communication Services	Reduced	581,427	-120,015	$13,419,335	−4.3%	0.98%
LIN	Linde PLC Basic Materials	Held	26,052	0	$12,915,539	+16.3%	0.95%
NVDA	Nvidia Corp Technology	Reduced	72,156	-7,788	$12,584,006	−15.6%	0.92%
PEP	Pepsico Inc Consumer Defensive	Reduced	76,982	-5,300	$11,954,534	+1.2%	0.88%
UNH	Unitedhealth Group Inc Healthcare	Added	44,072	+3,385	$11,925,442	−11.2%	0.87%
V	Visa Inc. Financial Services	Added	37,553	+6,055	$11,350,018	+2.7%	0.83%
P	Everpure, Inc. Technology	Held	190,420	0	$11,242,396	−11.9%	0.82%
MA	Mastercard Inc Financial Services	Added	21,481	+5,082	$10,733,196	+14.6%	0.79%
GEV	GE Vernova Inc. Industrials	Reduced	12,241	-835	$10,685,168	+25.0%	0.78%
BSX	Boston Scientific Corp Healthcare	Reduced	169,791	-1,090	$10,654,385	−34.6%	0.78%
GE	General Electric Co Industrials	Reduced	37,471	-14	$10,633,145	−7.9%	0.78%
AZN	Astrazeneca PLC Healthcare	NEW	50,765	NEW	$10,011,873	NEW	0.73%
MDT	Medtronic plc Healthcare	Held	108,128	0	$9,369,291	−9.8%	0.69%
AFL	Aflac Inc Financial Services	Held	83,570	0	$9,168,464	−0.5%	0.67%
ALKS	Alkermes plc. Healthcare	Added	244,760	+43,000	$8,654,713	+53.3%	0.63%
GFL	GFL Environmental Inc. Industrials	Added	203,174	+27,575	$8,476,419	+12.4%	0.62%
ROL	Rollins Inc Consumer Cyclical	Held	156,393	0	$8,352,950	−11.0%	0.61%
CSCO	Cisco Systems, Inc. Technology	Reduced	107,546	-992	$8,344,494	−0.2%	0.61%
ADI	Analog Devices Inc Technology	Held	24,789	0	$7,886,372	+17.3%	0.58%
ABNB	Airbnb, Inc. Consumer Cyclical	Held	62,355	0	$7,874,189	−7.0%	0.58%
JPM	Jpmorgan Chase & Co Financial Services	Held	23,935	0	$7,040,719	−8.7%	0.52%
APO	Apollo Global Management, Inc. Financial Services	Held	62,880	0	$7,006,089	−23.0%	0.51%
HD	Home Depot, Inc. Consumer Cyclical	Held	20,887	0	$6,869,525	−4.4%	0.50%
EW	Edwards Lifesciences Corp Healthcare	Held	81,497	0	$6,526,279	−6.1%	0.48%
FANG	Diamondback Energy, Inc. Energy	Added	32,200	+900	$6,368,838	+35.4%	0.47%
INTU	Intuit Inc. Technology	Added	14,540	+7,602	$6,286,805	+36.8%	0.46%