Boston Common Asset Management, LLC reported 114 positions worth $1.50B for the quarter ended Sep 30, 2026, up 2.5% on the prior quarter. It opened 2 new positions, added to 72, trimmed 33 and exited 7. Its largest holding is Taiwan Semiconductor Manufacturing Co Ltd at 7.7% 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 |
|---|---|---|---|---|
| HPE Hewlett Packard Enterprise Co | +246.8K | +539.1% | $15.77M | 1.24% |
| MSFT Microsoft Corp | +9,884 | +6.3% | $5.07M | 5.72% |
| MU Micron Technology Inc | +4,630 | +19.6% | $4.93M | 2% |
| ABT Abbott Laboratories | +39.2K | +108.2% | $3.88M | 0.496% |
| LEVI Levi Strauss & Co | +164.8K | – | $3.25M | 0.216% |
| KIM Kimco Realty Corp | +142.8K | +173.1% | $3.17M | 0.333% |
| CCK Crown Holdings, Inc. | +30.0K | +100.7% | $3.17M | 0.42% |
| MET Metlife Inc | +32.5K | +30.0% | $3.06M | 0.881% |
| AVGO Broadcom Inc. | +8,422 | +7.4% | $2.96M | 2.84% |
| ASML Asml Holding Nv | +1,598 | +37.2% | $2.90M | 0.711% |
| Holding | Change | Change % | Trade Value | Weight |
|---|---|---|---|---|
| CRH Crh Public Ltd Co | -162.6K | -100.0% | $17.40M | Exited |
| NVS Novartis Ag | -82.7K | -90.2% | $11.79M | 0.085% |
| AMAT Applied Materials Inc | -23.0K | -46.7% | $11.74M | 0.892% |
| AON Aon plc | -23.9K | -100.0% | $7.92M | Exited |
| CRM Salesforce, Inc. | -25.1K | -55.8% | $5.76M | 0.303% |
| TSM Taiwan Semiconductor Manufacturing Co Ltd | -10.6K | -4.0% | $4.83M | 7.73% |
| SPOT Spotify Technology S.A. | -7,969 | -16.0% | $3.88M | 1.36% |
| PANW Palo Alto Networks Inc | -7,173 | -16.9% | $2.85M | 0.935% |
| STLD Steel Dynamics Inc | -10.9K | -26.8% | $2.42M | 0.439% |
| NFLX Netflix Inc | -33.7K | -10.7% | $2.35M | 1.31% |
| Holding | Shares Sold | Trade Value | Prior Weight |
|---|---|---|---|
| CRH Crh Public Ltd Co | -162.6K | $17.40M | 1.19% |
| AON Aon plc | -23.9K | $7.92M | 0.54% |
| ES Eversource Energy | -11.3K | $813.25K | 0.055% |
| FERG Ferguson Enterprises Inc. | -1,718 | $407.73K | 0.028% |
| FISV Fiserv Inc | -5,153 | $252.76K | 0.017% |
| ED Consolidated Edison Inc | -1,970 | $217.94K | 0.015% |
| ITW Illinois Tool Works Inc | -752 | $203.39K | 0.014% |
| # | Activity | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| 1 | TSM Taiwan Semiconductor Manufacturing Co Ltd | Technology | 254.7K | $116.17M | 7.73% | -10.6K | -4.0% | Reduced | 0% |
| 2 | MSFT Microsoft Corp | Technology | 167.7K | $86.03M | 5.72% | +9,884 | +6.3% | Added | 0% |
| 3 | NVDA Nvidia Corp | Technology | 360.8K | $82.40M | 5.48% | -4,023 | -1.1% | Reduced | 0% |
| 4 | AAPL Apple Inc. | Technology | 233.7K | $77.81M | 5.17% | +8,640 | +3.8% | Added | 0% |
| 5 | GOOGL Alphabet Inc. | Technology | 148.2K | $51.00M | 3.39% | +5,716 | +4.0% | Added | 0% |
| 6 | AVGO Broadcom Inc. | Technology | 121.5K | $42.67M | 2.84% | +8,422 | +7.4% | Added | 0% |
| 7 | GOOG Alphabet Inc. | Technology | 106.4K | $36.27M | 2.41% | -3,704 | -3.4% | Reduced | 0% |
| 8 | V Visa Inc. | Financial Services | 91.5K | $32.88M | 2.19% | +2,692 | +3.0% | Added | 0.01% |
| 9 | MRK Merck & Co., Inc. | Healthcare | 215.0K | $31.24M | 2.08% | +16.8K | +8.5% | Added | 0.01% |
| 10 | MU Micron Technology Inc | Technology | 28.2K | $30.04M | 2% | +4,630 | +19.6% | Added | 0% |
| 11 | MS Morgan Stanley | Financial Services | 155.0K | $29.15M | 1.94% | -3,067 | -1.9% | Reduced | 0.01% |
| 12 | LLY ELI LILLY & Co | Healthcare | 24.2K | $28.00M | 1.86% | +1,638 | +7.3% | Added | 0% |
| 13 | DGX Quest Diagnostics Inc | Healthcare | 102.0K | $23.78M | 1.58% | +6,329 | +6.6% | Added | 0.09% |
| 14 | WAB Westinghouse Air Brake Technologies Corp | Industrials | 74.9K | $21.52M | 1.43% | +2,349 | +3.2% | Added | 0.04% |
| 15 | CL Colgate Palmolive Co | Consumer Staples | 247.1K | $21.08M | 1.4% | +16.1K | +7.0% | Added | 0.03% |
Tip. Select a row to see that position’s full history at Boston Common Asset Management.
As of its Q3 2026 13F filing, Boston Common Asset Management, LLC’s five largest positions were Taiwan Semiconductor Manufacturing Co Ltd (TSM) at 7.7%, Microsoft Corp (MSFT) at 5.7%, Nvidia Corp (NVDA) at 5.5%, Apple Inc. (AAPL) at 5.2%, Alphabet Inc. (GOOGL) at 3.4% of the reported portfolio.
Boston Common Asset Management, LLC reported a 13F portfolio worth $1.50B across 114 positions for Q3 2026. That is up 2.5% from the previous quarter.
Its largest purchases by value were Hewlett Packard Enterprise Co ($15.77M), Microsoft Corp ($5.07M), Micron Technology Inc ($4.93M). It opened 2 new positions.
Its largest sales by value were Crh Public Ltd Co ($17.40M), Novartis Ag ($11.79M), Applied Materials Inc ($11.74M). It exited 7 positions entirely.
From the Form 13F-HR reports Boston Common Asset Management, 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.