Location: Cambridge, MA
CIK: 0002055007 · Show all filings
Period: Q3 2026 (← Previous)
Filing Date: Nov 3, 2026
Total Value: $144M (100.0% shares, 0.0% debt)
| Ticker | Issuer | Shares | Value | % | Share Price | Est. Cost/Share | Unrealized @ Report Date | Class | CUSIP |
|---|---|---|---|---|---|---|---|---|---|
| BRK/B | BERKSHIRE HATHAWAY INC DEL | 60,291 | $30.02M | 20.8% | $497.95 | $504.52 | -1.3% | CL B NEW | 084670702 |
| GOOG | ALPHABET INC | 36,029 | $12.28M | 8.5% | $340.74 | $344.72 | -1.2% | CAP STK CL C | 02079K107 |
| BRK/A | BERKSHIRE HATHAWAY INC DEL | 7 | $5.229M | 3.6% | $747005.00 | $756667.44 | -1.3% | CL A | 084670108 |
| GOOGL | ALPHABET INC | 12,830 | $4.415M | 3.1% | $344.08 | $347.07 | -0.9% | CAP STK CL A | 02079K305 |
| XOM | EXXONMOBIL HOLDINGS CORP | 23,961 | $3.9M | 2.7% | $162.75 | $162.75 | — | COM SHS *A* | 30233Q108 |
| Ticker | Issuer | Shares | Value | % | Share Price | Est. Cost/Share | Unrealized @ Report Date | Class | CUSIP |
|---|---|---|---|---|---|---|---|---|---|
| XOM | EXXON MOBIL CORP | 24,761 | $3.385M | 2.4% | $136.72 * | $112.36 | +44.8% | — | 30231G102 |
| Ticker | Issuer | Shares | Value | % | Share Price | Est. Cost/Share | Unrealized @ Report Date | Class | CUSIP |
|---|---|---|---|---|---|---|---|---|---|
| MSFT | MICROSOFT CORP | 37,776 (-2.0%) | $19.38M (+34.8%) | 13.4% | $512.90 | $420.90 | +21.9% | COM | 594918104 |
| AAPL | APPLE INC | 24,722 (-2.8%) | $8.233M (+11.9%) | 5.7% | $333.02 | $234.51 | +42.0% | COM | 037833100 |
| COST | COSTCO WHOLESALE CORPORATION | 6,339 (-3.4%) | $5.771M (-6.0%) | 4.0% | $910.34 | $924.02 | -1.5% | COM | 22160K105 |
| PANW | PALO ALTO NETWORKS INC | 6,586 (-4.2%) | $2.617M (+11.6%) | 1.8% | $397.31 | $188.91 | +110.3% | COM | 697435105 |
| PEP | PEPSICO INC | 12,103 (-7.6%) | $1.534M (-13.6%) | 1.1% | $126.72 | $156.55 | -19.1% | COM | 713448108 |
| NVS | NOVARTIS AG | 5,141 (-12.0%) | $733K (-19.9%) | 0.5% | $142.57 | $106.64 | +33.7% | SPONSORED ADR | 66987V109 |
| PG | PROCTER & GAMBLE CO | 16,518 (-3.6%) | $2.4M (-4.5%) | 1.7% | $145.28 | $165.73 | -12.3% | COM | 742718109 |
| JNJ | JOHNSON & JOHNSON | 10,914 (-7.5%) | $2.889M (-3.6%) | 2.0% | $264.74 | $149.59 | +77.0% | COM | 478160104 |
| JPM | JPMORGAN CHASE & CO | 10,587 (-3.8%) | $3.502M (-2.8%) | 2.4% | $330.83 | $232.60 | +42.2% | COM | 46625H100 |
| DIS | DISNEY WALT CO | 22,270 (-11.3%) | $2.336M (-3.4%) | 1.6% | $104.90 | $103.52 | +1.3% | COM | 254687106 |
| AMZN | AMAZON COM INC | 51,598 (-4.8%) | $12.86M (-0.5%) | 8.9% | $249.15 | $209.72 | +18.8% | COM | 023135106 |
| DEO | DIAGEO PLC | 8,040 (-13.0%) | $688K (-7.3%) | 0.5% | $85.60 | $127.22 | -32.7% | SPON ADR NEW | 25243Q205 |
| MORN | MORNINGSTAR INC | 4,164 (-14.4%) | $791K (+4.3%) | 0.5% | $190.04 | $341.38 | -44.3% | COM | 617700109 |
| Ticker | Issuer | Shares | Value | % | Share Price | Est. Cost/Share | Unrealized @ Report Date | Class | CUSIP |
|---|---|---|---|---|---|---|---|---|---|
| MS | MORGAN STANLEY | 25,328 | $4.764M | 3.3% | $188.08 | $119.51 | +57.4% | COM NEW | 617446448 |
| MKL | MARKEL GROUP INC | 2,031 | $3.478M | 2.4% | $1712.45 | $1698.35 | +0.8% | COM | 570535104 |
| META | META PLATFORMS INC | 2,209 | $1.602M | 1.1% | $725.18 | $613.38 | +18.2% | CL A | 30303M102 |
| ANET | ARISTA NETWORKS INC | 5,956 | $1.213M | 0.8% | $203.59 | $102.84 | +98.0% | COM SHS | 040413205 |
| NOW | SERVICENOW INC | 5,200 | $697K | 0.5% | $134.01 | $177.75 | -24.6% | COM | 81762P102 |
| AXP | AMERICAN EXPRESS CO | 5,074 | $1.543M | 1.1% | $304.10 | $283.58 | +7.2% | COM | 025816109 |
| NVDA | NVIDIA CORPORATION | 5,750 | $1.313M | 0.9% | $228.38 | $137.79 | +65.7% | COM | 67066G104 |
| UNH | UNITEDHEALTH GROUP INC | 2,099 | $771K | 0.5% | $367.08 | $552.89 | -33.6% | COM | 91324P102 |
| V | VISA INC | 5,990 | $2.152M | 1.5% | $359.33 | $298.33 | +20.4% | COM CL A | 92826C839 |
| LOW | LOWES COS INC | 2,344 | $432K | 0.3% | $184.29 | $261.54 | -29.5% | COM | 548661107 |
| LIN | LINDE PLC | 1,778 | $844K | 0.6% | $474.65 | $448.71 | +5.8% | SHS | G54950103 |
| KO | COCA COLA CO | 11,615 | $1M | 0.7% | $86.08 | $63.09 | +36.5% | COM | 191216100 |
| CL | COLGATE PALMOLIVE CO | 7,825 | $668K | 0.5% | $85.32 | $93.07 | -8.3% | COM | 194162103 |
| MTB | M & T BK CORP | 1,175 | $256K | 0.2% | $217.60 | $192.44 | +13.1% | COM | 55261F104 |
| IVV | ISHARES TR | 1,379 | $1.056M | 0.7% | $765.85 | $591.75 | +29.4% | CORE S&P500 ETF | 464287200 |
| WFC | WELLS FARGO & CO | 5,630 | $451K | 0.3% | $80.05 | $66.67 | +20.1% | COM | 949746101 |
| ETN | EATON CORP PLC | 2,972 | $1.277M | 0.9% | $429.71 | $347.11 | +23.8% | SHS | G29183103 |
| ECL | ECOLAB INC | 2,415 | $663K | 0.5% | $274.58 | $245.53 | +11.8% | COM | 278865100 |
| PAYX | PAYCHEX INC | 3,160 | $311K | 0.2% | $98.50 | $137.31 | -28.3% | COM | 704326107 |