Foster Dykema Cabot & Partners, LLC reported 275 positions worth $1.03B for the quarter ended Sep 30, 2026, up 20.1% on the prior quarter. It opened 28 new positions, added to 45, trimmed 21 and exited 0. Its largest holding is Amazon Com Inc at 10.3% of the portfolio.
Reported 13F market value at each quarter end. A change mixes trading with price moves in the positions held.
Dollar value of shares bought and sold each quarter, at that quarter’s price. It counts trading only, not price changes.
How many positions were opened, added to, trimmed or closed each quarter.
Share of reported value in each sector at every quarter end.
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| AMZN Amazon Com Inc | +191.8K | +81.7% | $47.80M | 10.31% |
| MSFT Microsoft Corp | +65.7K | +57.3% | $33.70M | 8.97% |
| AAPL Apple Inc. | +71.5K | +76.9% | $23.82M | 5.31% |
| V Visa Inc. | +47.6K | +1,229.0% | $17.12M | 1.79% |
| NVDA Nvidia Corp | +55.3K | +29.6% | $12.65M | 5.38% |
| MA Mastercard Inc | +10.7K | +38,178.6% | $5.90M | 0.573% |
| COST Costco Wholesale Corp | +5,811 | +12.9% | $5.29M | 4.48% |
| GS Goldman Sachs Group Inc | +5,154 | +13.6% | $4.64M | 3.75% |
| JPM Jpmorgan Chase & Co | +13.8K | +11.7% | $4.58M | 4.25% |
| ABBV AbbVie Inc. | +12.4K | +325.1% | $3.24M | 0.411% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| APH Amphenol Corp | -29.8K | -3.0% | $2.52M | 7.78% |
| PWR Quanta Services, Inc. | -2,468 | -2.6% | $1.59M | 5.8% |
| VRTX Vertex Pharmaceuticals Inc / Ma | -1,294 | -2.2% | $676.52K | 2.89% |
| TMO Thermo Fisher Scientific Inc. | -763 | -1.8% | $515.42K | 2.68% |
| BRK-B Berkshire Hathaway Inc | -830 | -1.5% | $413.30K | 2.63% |
| ETN Eaton Corp plc | -713 | -0.8% | $306.38K | 3.69% |
| LLY ELI LILLY & Co | -260 | -0.9% | $300.84K | 3.12% |
| PG PROCTER & GAMBLE Co | -1,683 | -6.5% | $244.51K | 0.341% |
| CTAS Cintas Corp | -747 | -0.5% | $145.71K | 2.88% |
| NBIS Nebius Group N.V. | -194 | -50.0% | $45.76K | <0.01% |
| Holding | Shares | Trade Value | Weight |
|---|---|---|---|
| TDG TransDigm Group INC | +130 | $140.74K | 0.014% |
| EQIX Equinix Inc | +130 | $131.51K | 0.013% |
| RACE Ferrari N.V. | +300 | $117.86K | 0.011% |
| XPO XPO, Inc. | +625 | $109.99K | 0.011% |
| WCN Waste Connections, Inc. | +710 | $109.29K | 0.011% |
| TECK Teck Resources Ltd | +1,600 | $105.26K | 0.01% |
| APD Air Products & Chemicals, Inc. | +375 | $104.34K | 0.01% |
| RBC RBC Bearings INC | +205 | $102.34K | <0.01% |
| MPC Marathon Petroleum Corp | +250 | $98.86K | <0.01% |
| ILMN Illumina, Inc. | +355 | $97.16K | <0.01% |
No positions were closed this quarter.
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | AMZN Amazon Com Inc | Consumer Discretionary | 426.7K | $106.30M | 10.31% | +191.8K | +81.7% | Added | 0% |
| 2 | MSFT Microsoft Corp | Technology | 180.5K | $92.55M | 8.97% | +65.7K | +57.3% | Added | 0% |
| 3 | APH Amphenol Corp | Industrials | 950.5K | $80.25M | 7.78% | -29.8K | -3.0% | Reduced | 0.04% |
| 4 | PWR Quanta Services, Inc. | Industrials | 93.1K | $59.79M | 5.8% | -2,468 | -2.6% | Reduced | 0.06% |
| 5 | GOOGL Alphabet Inc. | Technology | 166.1K | $57.15M | 5.54% | +1,483 | +0.9% | Added | 0% |
| 6 | NVDA Nvidia Corp | Technology | 242.5K | $55.44M | 5.38% | +55.3K | +29.6% | Added | 0% |
| 7 | AAPL Apple Inc. | Technology | 164.5K | $54.79M | 5.31% | +71.5K | +76.9% | Added | 0% |
| 8 | COST Costco Wholesale Corp | Consumer Staples | 50.8K | $46.21M | 4.48% | +5,811 | +12.9% | Added | 0.01% |
| 9 | JPM Jpmorgan Chase & Co | Financial Services | 132.3K | $43.78M | 4.25% | +13.8K | +11.7% | Added | 0% |
| 10 | GS Goldman Sachs Group Inc | Financial Services | 43.0K | $38.71M | 3.75% | +5,154 | +13.6% | Added | 0.01% |
| 11 | ETN Eaton Corp plc | Industrials | 88.7K | $38.10M | 3.69% | -713 | -0.8% | Reduced | 0.02% |
| 12 | AXP American Express Co | Financial Services | 114.7K | $34.89M | 3.38% | -38 | 0.0% | Reduced | 0.02% |
| 13 | LLY ELI LILLY & Co | Healthcare | 27.8K | $32.13M | 3.12% | -260 | -0.9% | Reduced | 0% |
| 14 | VRTX Vertex Pharmaceuticals Inc / Ma | Healthcare | 56.9K | $29.77M | 2.89% | -1,294 | -2.2% | Reduced | 0.02% |
| 15 | CTAS Cintas Corp | Industrials | 152.2K | $29.68M | 2.88% | -747 | -0.5% | Reduced | 0.04% |
Tip. Select a row to see that position’s full history at Foster Dykema Cabot & Partners.
As of its Q3 2026 13F filing, Foster Dykema Cabot & Partners, LLC’s five largest positions were Amazon Com Inc (AMZN) at 10.3%, Microsoft Corp (MSFT) at 9.0%, Amphenol Corp (APH) at 7.8%, Quanta Services, Inc. (PWR) at 5.8%, Alphabet Inc. (GOOGL) at 5.5% of the reported portfolio.
Foster Dykema Cabot & Partners, LLC reported a 13F portfolio worth $1.03B across 275 positions for Q3 2026. That is up 20.1% from the previous quarter.
Its largest purchases by value were Amazon Com Inc ($47.80M), Microsoft Corp ($33.70M), Apple Inc. ($23.82M). It opened 28 new positions.
Its largest sales by value were Amphenol Corp ($2.52M), Quanta Services, Inc. ($1.59M), Vertex Pharmaceuticals Inc / Ma ($676.52K). It exited 0 positions entirely.
From the Form 13F-HR reports Foster Dykema Cabot & Partners, LLC files with the SEC each quarter, within 45 days of quarter end. A 13F lists long positions in US-listed equities and options; it excludes short positions, cash, bonds and most non-US holdings.
13F data reflects long positions in US-listed equities and options as reported to the SEC up to 45 days after quarter end. It excludes short positions, cash, bonds and most non-US securities, so it is not a complete picture of a manager’s assets.