Holders — by stockHoldings — by fund
S&CO INC
Everything this manager disclosed owning in US-listed stocks — its complete Form 13F portfolio · as of 2026-06-30 · filed with the SEC up to 45 days after quarter end · CIK 0001082461
$1.7M
disclosed book value
222
positions
5.8%
largest position share
Positions, as of 2026-06-30
top 100 of 222 · 13F covers long US-listed positions only — cash, bonds, private and foreign stakes are not disclosed · PUT/CALL tags = options positions (share-equivalents), not shares held
| # | Issuer | Shares | Value | % of book |
|---|---|---|---|---|
| 1 | CATCATERPILLAR INC. | 94,076 | $100,181 | 5.8% |
| 2 | BRK/BBERKSHIRE HATHAWAY INC CL B | 164,075 | $82,101 | 4.7% |
| 3 | MSFTMICROSOFT CORP | 198,340 | $73,984 | 4.3% |
| 4 | XOMEXXONMOBIL HOLDINGS CORP | 526,003 | $71,915 | 4.2% |
| 5 | AAPLAPPLE INC | 220,707 | $63,863 | 3.7% |
| 6 | CHDCHURCH & DWIGHT CO INC | 649,655 | $62,938 | 3.6% |
| 7 | ECLECOLAB INC | 225,862 | $62,927 | 3.6% |
| 8 | MRKMERCK & CO INC | 425,528 | $54,680 | 3.2% |
| 9 | AMZNAMAZON.COM INC | 196,975 | $46,947 | 2.7% |
| 10 | ADPAUTOMATIC DATA PROCESSING INC | 201,978 | $45,232 | 2.6% |
| 11 | GOOGALPHABET INC CLASS C | 118,113 | $41,732 | 2.4% |
| 12 | JNJJOHNSON & JOHNSON | 157,098 | $39,898 | 2.3% |
| 13 | GOOGLALPHABET INC CAP STK CL A | 94,857 | $33,899 | 2% |
| 14 | CCJCAMECO CORP | 313,626 | $31,945 | 1.8% |
| 15 | PANWPALO ALTO NETWORKS INC | 91,852 | $31,323 | 1.8% |
| 16 | GLDSPDR GOLD TRUST | 80,565 | $29,678 | 1.7% |
| 17 | APDAIR PRODUCTS & CHEMICALS INC C | 94,594 | $27,733 | 1.6% |
| 18 | LLYELI LILLY & CO COM | 22,300 | $26,747 | 1.5% |
| 19 | MOSMOSAIC COMPANY | 1.0M | $22,052 | 1.3% |
| 20 | PROSYPROSUS NV -SPON ADR | 2.5M | $21,714 | 1.3% |
| 21 | TMOTHERMO FISHER SCIENTIFIC INC C | 41,387 | $20,749 | 1.2% |
| 22 | ROYALTY PHARMA PLC CL A | 358,302 | $20,089 | 1.2% |
| 23 | UNPUNION PACIFIC CORP | 69,353 | $18,864 | 1.1% |
| 24 | PYPLPAYPAL HOLDINGS INC | 436,017 | $18,827 | 1.1% |
| 25 | LLYVKLIBERTY MEDIA CORP-LIBERTY LIV | 174,783 | $18,464 | 1.1% |
| 26 | UNHUNITEDHEALTH GROUP INC COM | 43,984 | $18,281 | 1.1% |
| 27 | ARANTERO RESOURCES CORP | 504,602 | $17,731 | 1% |
| 28 | ABTABBOTT LABS | 186,521 | $16,924 | 1% |
| 29 | SIRISIRIUS XM HOLDINGS INC | 569,206 | $16,814 | 1% |
| 30 | PEVERPURE, INC. CLASS A | 190,420 | $15,003 | 0.9% |
| 31 | XBISPDR S&P BIOTECH ETF | 94,310 | $14,924 | 0.9% |
| 32 | NVDANVIDIA CORP COM | 72,156 | $14,437 | 0.8% |
| 33 | VVISA INC. CL A | 41,890 | $14,372 | 0.8% |
| 34 | FULH.B. FULLER CO. | 241,781 | $14,093 | 0.8% |
| 35 | GEVGE VERNOVA INC | 11,732 | $13,783 | 0.8% |
| 36 | LINDE PLC | 26,139 | $13,564 | 0.8% |
| 37 | GEGE AEROSPACE COM (NEW) | 35,671 | $13,331 | 0.8% |
| 38 | ALKERMES PLC | 244,760 | $12,824 | 0.7% |
| 39 | CSCOCISCO SYSTEMS INC COM | 107,126 | $12,583 | 0.7% |
| 40 | RHHBYROCHE HOLDING LTD SPONSORED AD | 230,310 | $11,877 | 0.7% |
| 41 | FWONKLIBERTY FORMULA ONE SER C | 122,528 | $11,657 | 0.7% |
| 42 | MAMASTERCARD INC - A | 22,358 | $11,483 | 0.7% |
| 43 | GFLGFL ENVIRONMENTAL | 293,524 | $10,798 | 0.6% |
| 44 | PEPPEPSICO INC | 75,677 | $10,246 | 0.6% |
| 45 | AFLAFLAC INC COM | 83,570 | $9,798 | 0.6% |
| 46 | ADIANALOG DEVICES INC COM | 23,789 | $9,448 | 0.5% |
| 47 | ABNBAIRBNB INC A | 62,355 | $8,923 | 0.5% |
| 48 | MEDTRONIC PLC | 108,128 | $8,458 | 0.5% |
| 49 | VWOVANGUARD FTSE EMERGING MARKET | 132,538 | $7,911 | 0.5% |
| 50 | JPMJP MORGAN CHASE & CO | 23,285 | $7,621 | 0.4% |
| 51 | APOAPOLLO ASSET MANAGEMENT INC. | 62,880 | $7,439 | 0.4% |
| 52 | EWEDWARDS LIFESCIENCES CORP | 81,497 | $7,372 | 0.4% |
| 53 | HDHOME DEPOT INC COM | 20,887 | $7,366 | 0.4% |
| 54 | BSXBOSTON SCIENTIFIC CORP | 169,791 | $7,246 | 0.4% |
| 55 | MSMORGAN STANLEY COM | 33,987 | $7,104 | 0.4% |
| 56 | ASTRAZENECA PLC | 37,990 | $7,101 | 0.4% |
| 57 | ROLROLLINS INC COM | 156,393 | $6,527 | 0.4% |
| 58 | CHUBB LIMITED | 18,916 | $6,445 | 0.4% |
| 59 | RVMDREVOLUTION MEDICINES INC | 34,171 | $6,399 | 0.4% |
| 60 | FANGDIAMONDBACK ENERGY INC | 32,200 | $5,660 | 0.3% |
| 61 | FWONALIBERTY MEDIA CORP-FORMULA-A | 64,254 | $5,624 | 0.3% |
| 62 | ELESTEE LAUDER COMPANIES-CL A | 70,764 | $5,586 | 0.3% |
| 63 | CCITIGROUP INC COM NEW | 39,794 | $5,569 | 0.3% |
| 64 | RTXRTX CORP. | 28,883 | $5,479 | 0.3% |
| 65 | TECHBIO-TECHNE CORPORATION | 76,614 | $5,412 | 0.3% |
| 66 | BACBANK OF AMERICA CORP | 92,484 | $5,269 | 0.3% |
| 67 | IBKRINTERACTIVE BROKERS GROUP INC | 60,130 | $5,233 | 0.3% |
| 68 | VIGVANGUARD DIVIDEND APPRECIATION | 21,632 | $5,118 | 0.3% |
| 69 | MMM3M COMPANY COM | 31,055 | $5,028 | 0.3% |
| 70 | MIDDMIDDLEBY CORPORATION | 29,100 | $5,005 | 0.3% |
| 71 | LLYVALIBERTY MEDIA CORP-LIBERTY LIV | 49,334 | $4,995 | 0.3% |
| 72 | CVXCHEVRON CORP NEW COM | 30,024 | $4,976 | 0.3% |
| 73 | SYKSTRYKER CORP. | 15,307 | $4,819 | 0.3% |
| 74 | WECWEC ENERGY GROUP INC COM | 40,672 | $4,749 | 0.3% |
| 75 | IBMINTERNATIONAL BUSINESS MACHINE | 16,788 | $4,720 | 0.3% |
| 76 | LIBERTY GLOBAL LTD-C | 422,835 | $4,651 | 0.3% |
| 77 | IVWISHARES S&P 500/BARRA GROWTH I | 33,695 | $4,634 | 0.3% |
| 78 | TE CONNECTIVITY PLC | 22,398 | $4,515 | 0.3% |
| 79 | RBRKRUBRIK INC A | 53,612 | $4,303 | 0.2% |
| 80 | WATWATERS CORP COM | 11,417 | $4,281 | 0.2% |
| 81 | EXPEEXPEDIA GROUP INC COM | 16,285 | $4,167 | 0.2% |
| 82 | LBRDKLIBERTY BROADBAND-C | 121,528 | $4,042 | 0.2% |
| 83 | EATON CORP PLC | 8,976 | $3,824 | 0.2% |
| 84 | VGKVANGUARD MSCI EUROPEAN INDEX E | 40,000 | $3,541 | 0.2% |
| 85 | DXJWISDOMTREE JAPAN HEDGED EQUITY | 20,000 | $3,470 | 0.2% |
| 86 | FSLRFIRST SOLAR, INC. | 14,596 | $3,444 | 0.2% |
| 87 | METAMETA PLATFORMS INC | 5,710 | $3,216 | 0.2% |
| 88 | GDXVANECK GOLD MINERS ETF | 42,589 | $3,213 | 0.2% |
| 89 | TVTXTRAVERE THERAPEUTICS, INC. | 56,000 | $3,181 | 0.2% |
| 90 | ILMNILLUMINA, INC. | 18,000 | $3,164 | 0.2% |
| 91 | MRVLMARVELL TECHNOLOGY, INC. | 10,573 | $3,149 | 0.2% |
| 92 | TJXTJX COS INC NEW COM | 20,636 | $3,126 | 0.2% |
| 93 | TSLATESLA MOTORS INC | 7,181 | $3,020 | 0.2% |
| 94 | INTUINTUIT, INC. | 11,518 | $3,006 | 0.2% |
| 95 | PGPROCTER & GAMBLE CO | 20,418 | $2,994 | 0.2% |
| 96 | HUMHUMANA INC. | 7,351 | $2,919 | 0.2% |
| 97 | WFCWELLS FARGO & CO COM | 34,949 | $2,888 | 0.2% |
| 98 | PPLIPEOPLE INCORPORATED | 59,425 | $2,743 | 0.2% |
| 99 | ELANELANCO ANIMAL HEALTH, INC | 111,284 | $2,738 | 0.2% |
| 100 | OKTAOKTA, INC. | 19,699 | $2,687 | 0.2% |
Source: SEC Form 13F-HR, reporting period 2026-06-30. Values are the manager's filed June-30-style quarter-end marks, not live prices. Research, not investment advice.