CIK: 0001409427
Total reported value
$1.6B
Reporting period: 2026-03-31 · Number of holdings: 186
Boston Common Asset Management, LLC disclosed 186 holdings in its latest 13F filing for the period ending 2026-03-31, with total reported value of $1.6B and a quarterly turnover rate of 19.7%.
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Boston Common Asset Management, LLC's disclosed holdings carry a Herfindahl concentration index of 0.017 — mathematically equivalent to about 59 equally-sized positions, well below its 186 actual disclosed holdings. That gap points to a strategy built around a small core of high-conviction bets rather than broad diversification.
Position sizes vary widely across the portfolio (a coefficient of variation of 1.47), with a handful of outsized bets alongside many smaller positions.
No strong tilt toward either adding to existing winners or initiating outsized new positions was observed in the latest reported quarter.
Trim INTU
-94.4% -$14.6M
Trim MSFT
-1.1% -$17.1M
Add AMAT
+138.8% $10.9M
Add SPOT
+64.0% $6.9M
Trim CRH
-20.9% -$9.0M
Trim HDB
-0.8% -$8.0M
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | TSM | Taiwan Semiconductor-sp Adr | Stock-Tech | 6.26% | +0.18% | -13.33% | |
| 2 | NVDA | Nvidia CORP | Stock-Tech | 4.51% | -0.10% | -2.04% | |
| 3 | AAPL | Apple INC | Stock-Tech | 3.91% | -0.20% | -4.56% | |
| 4 | MSFT | Microsoft CORP | Stock-Tech | 3.42% | -0.81% | -1.13% | |
| 5 | GOOGL | Alphabet Inc-cl A | Stock-Comm Services | 2.61% | -0.19% | -5.30% | |
| 6 | AVGO | Broadcom INC | Stock-Tech | 2.46% | -0.08% | +1.31% | |
| 7 | GOOG | Alphabet Inc-cl C | Stock-Comm Services | 2.37% | -0.19% | -5.33% | |
| 8 | NFLX | Netflix INC | Stock-Comm Services | 2.18% | — | +1.59% | |
| 9 | V | Visa Inc-class A Shares | Stock-Financials | 1.85% | -0.23% | -3.26% | |
| 10 | MS | Morgan Stanley | Stock-Financials | 1.70% | -0.17% | -8.39% | |
| 11 | SPOT | Spotify Technology S.A. | Stock-Comm Services | 1.64% | +0.52% | +63.95% | |
| 12 | VRT | Vertiv Holdings Co-a | Stock-Industrials | 1.61% | +0.37% | -21.18% | |
| 13 | MRK | Merck & Co. INC. | Stock-Healthcare | 1.54% | +0.25% | -2.23% | |
| 14 | LLY | Eli Lilly & Co | Stock-Healthcare | 1.44% | -0.32% | -10.56% | |
| 15 | CL | Colgate-palmolive Co | Stock-Consumer Staples | 1.37% | +0.26% | +7.06% | |
| 16 | HUBB | Hubbell INC | Stock-Industrials | 1.29% | — | -2.04% | |
| 17 | NUSC | Nuveen Esg Small-cap ETF | ETF-Other | 1.23% | — | -4.51% | |
| 18 | WAB | Wabtec CORP | Stock-Industrials | 1.19% | +0.22% | -1.97% | |
| 19 | TJX | Tjx Companies INC | Stock-Consumer Disc | 1.16% | — | -3.94% | |
| 20 | CRH | CRH plc | Stock-Materials | 1.15% | -0.47% | -20.90% | |
| 21 | DGX | Quest Diagnostics INC | Stock-Healthcare | 1.14% | +0.33% | +16.87% | |
| 22 | TMUS | T-mobile US INC | Stock-Comm Services | 1.13% | — | +1.06% | |
| 23 | XYL | Xylem INC | Stock-Industrials | 1.12% | — | +7.47% | |
| 24 | AWK | American Water Works Co INC | Stock-Utilities | 1.12% | — | +4.23% | |
| 25 | CB | Chubb Limited | Stock-Financials | 1.07% | — | -0.53% | |
| 26 | HDB | Hdfc Bank Ltd-adr | Stock-Financials | 1.07% | -0.41% | -0.83% | |
| 27 | NVS | Novartis Ag-sponsored Adr | Stock-Healthcare | 1.06% | — | -4.55% | |
| 28 | RHHBY | Roche Holdings Ltd-spons Adr | Stock-Other | 1.03% | — | -5.02% | |
| 29 | VZ | Verizon Communications INC | Stock-Comm Services | 1.02% | +0.29% | +6.85% | |
| 30 | AMAT | Applied Materials INC | Stock-Tech | 1.02% | +0.72% | +138.77% | |
| 31 | ECL | Ecolab INC | Stock-Materials | 0.90% | — | -2.11% | |
| 32 | CRM | Salesforce INC | Stock-Tech | 0.89% | -0.29% | -0.14% | |
| 33 | DHR | Danaher CORP | Stock-Healthcare | 0.87% | -0.13% | -1.83% | |
| 34 | CBRE | Cbre Group INC - A | Stock-Real Estate | 0.86% | — | +3.00% | |
| 35 | ADI | Analog Devices INC | Stock-Tech | 0.85% | — | -7.08% | |
| 36 | BNY | Bank Of New York Mellon CORP | Stock-Financials | 0.84% | — | +6.60% | |
| 37 | COST | Costco Wholesale CORP | Stock-Consumer Staples | 0.82% | — | -3.98% | |
| 38 | EW | Edwards Lifesciences CORP | Stock-Healthcare | 0.81% | — | +4.51% | |
| 39 | HASI | Ha Sustainable Infrastructur | Stock-Financials | 0.76% | +0.38% | +58.37% | |
| 40 | TCOM | Trip.com Group Ltd-adr | Stock-Consumer Disc | 0.75% | -0.11% | +18.05% | |
| 41 | BAC | Bank Of America CORP | Stock-Financials | 0.75% | -0.08% | -4.49% | |
| 42 | CME | Cme Group INC | Stock-Financials | 0.75% | — | -3.11% | |
| 43 | PG | Procter & Gamble Co/the | Stock-Consumer Staples | 0.75% | +0.17% | +21.33% | |
| 44 | WM | Waste Management INC | Stock-Industrials | 0.73% | — | -2.65% | |
| 45 | GILD | Gilead Sciences INC | Stock-Healthcare | 0.69% | — | -8.57% | |
| 46 | AMGN | Amgen INC | Stock-Healthcare | 0.67% | — | -10.45% | |
| 47 | EMR | Emerson Electric Co | Stock-Industrials | 0.65% | — | -3.65% | |
| 48 | RL | Ralph Lauren CORP | Stock-Consumer Disc | 0.65% | — | -4.53% | |
| 49 | BKNG | Booking Holdings INC | Stock-Consumer Disc | 0.64% | -0.28% | -16.74% | |
| 50 | CMI | Cummins INC | Stock-Industrials | 0.64% | — | -15.88% |
Performance for Q3 2026
+1.7%
Performance Last 4 Quarters
+4.4%
Based on 5 months of available history
Based on 71% of reported portfolio value with available pricing
| Period | Holdings | Total value | Stability | Top holdings |
|---|---|---|---|---|
| 2026-03-31 | 186 | $1.6B | 20 | |
| 2025-12-31 | 195 | $1.7B | 82 | |
| 2025-09-30 | 309 | $3.6B | 47 | |
| 2025-06-30 | 311 | $3.6B | 0 | |
| 2025-03-31 | 307 | $3.3B | 100 | |
| 2024-12-31 | 322 | $3.4B | 0 | |
| 2024-09-30 | 334 | $3.8B | 0 | |
| 2024-06-30 | 335 | $3.9B | 0 | |
| 2024-03-31 | 327 | $4.2B | 0 | |
| 2023-12-31 | 323 | $4.4B | 0 | 1F869212D2035M3Y64248 |
| 2023-09-30 | 324 | $4.2B | 0 | 1F869212J619333D2035M |
| 2023-06-30 | 322 | $4.7B | 0 | 1F869212D354153D2035M |
| 2023-03-31 | 316 | $4.8B | 0 | 1D2035M2F869213D35415 |
| 2022-12-31 | 258 | $2.1B | 0 | |
| 2022-09-30 | 256 | $1.9B | 0 | |
| 2022-06-30 | 264 | $2.0B | 0 | |
| 2022-03-31 | 264 | $2.3B | 0 | |
| 2021-12-31 | 262 | $2.5B | 0 | |
| 2021-09-30 | 254 | $2.3B | 0 | |
| 2021-06-30 | 256 | $2.3B | 41 | |
| 2021-03-31 | 254 | $1.6B | 23 | |
| 2020-12-31 | 241 | $1.4B | 43 | |
| 2020-09-30 | 216 | $1.1B | 19 | |
| 2020-06-30 | 215 | $937.3M | 31 | |
| 2020-03-31 | 203 | $709.1M | 36 | |
| 2019-12-31 | 210 | $858.2M | 32 | |
| 2019-09-30 | 186 | $809.9M | 35 | |
| 2019-06-30 | 182 | $802.6M | 17 | |
| 2019-03-31 | 184 | $770.3M | 22 | |
| 2018-12-31 | 185 | $685.8M | 26 | |
| 2018-09-30 | 195 | $806.4M | 11 | |
| 2018-06-30 | 198 | $807.6M | 23 | |
| 2018-03-31 | 205 | $848.8M | 21 | |
| 2017-12-31 | 183 | $843.0M | 17 | |
| 2017-09-30 | 189 | $802.3M | 16 | |
| 2017-06-30 | 187 | $759.5M | 15 | |
| 2017-03-31 | 181 | $735.7M | 21 | |
| 2016-12-31 | 188 | $685.1M | 100 | |
| 2016-09-30 | 273 | $1.8B | 19 | |
| 2016-06-30 | 270 | $1.7B | 16 | |
| 2016-03-31 | 264 | $1.8B | 19 | |
| 2015-12-31 | 270 | $1.8B | 19 | |
| 2015-09-30 | 274 | $1.6B | 26 | |
| 2015-06-30 | 275 | $1.9B | 20 | |
| 2015-03-31 | 275 | $1.9B | 14 | |
| 2014-12-31 | 274 | $1.8B | 19 | |
| 2014-09-30 | 273 | $1.8B | 15 | |
| 2014-06-30 | 379 | $1.8B | 18 | |
| 2014-03-31 | 412 | $1.8B | 16 | |
| 2013-12-31 | 304 | $1.8B | 24 | |
| 2013-09-30 | 419 | $1.7B | 21 | |
| 2013-06-30 | 405 | $1.6B | — |
Boston Common Asset Management, LLC's most significant position changes for 2026-03-31: Sold out: Topbuild CORP (BLD); New buy: Ebay INC (EBAY); Sold out: Weyerhaeuser Co (WY); New buy: ASML Holding N.V. (ASML); Sold out: Ashtead Group PLC Spon Adr (ASHGY).
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | AMAT | Applied Materials INC | +0.7% | +138.77% | Add |
| 2 | SPOT | Spotify Technology S.A. | +0.5% | +63.95% | Add |
| 3 | HASI | Ha Sustainable Infrastructur | +0.4% | +58.37% | Add |
| 4 | VRT | Vertiv Holdings Co-a | +0.4% | -21.18% | Trim |
| 5 | DGX | Quest Diagnostics INC | +0.3% | +16.87% | Add |
| 6 | VZ | Verizon Communications INC | +0.3% | +6.85% | Add |
| 7 | CL | Colgate-palmolive Co | +0.3% | +7.06% | Add |
| 8 | MRK | Merck & Co. INC. | +0.3% | -2.23% | Trim |
| 9 | WAB | Wabtec CORP | +0.2% | -1.97% | Trim |
| 10 | TSM | Taiwan Semiconductor-sp Adr | +0.2% | -13.33% | Trim |
| 11 | PG | Procter & Gamble Co/the | +0.2% | +21.33% | Add |
| 12 | SFM | Sprouts Farmers Market INC | +0.2% | +61.92% | Add |
| 13 | AVGO | Broadcom INC | -0.1% | +1.31% | Add |
| 14 | BAC | Bank Of America CORP | -0.1% | -4.49% | Trim |
| 15 | NVDA | Nvidia CORP | -0.1% | -2.04% | Trim |
| 16 | SAP | Sap Se-sponsored Adr | -0.1% | +13.22% | Add |
| 17 | TCOM | Trip.com Group Ltd-adr | -0.1% | +18.05% | Add |
| 18 | FSLR | First Solar INC | -0.1% | -3.22% | Trim |
| 19 | AXAHY | Axa -spons Adr | -0.1% | -28.35% | Trim |
| 20 | DHR | Danaher CORP | -0.1% | -1.83% | Trim |
| 21 | EFA | Ishares Msci Eafe ETF | -0.1% | -80.16% | Trim |
| 22 | MS | Morgan Stanley | -0.2% | -8.39% | Trim |
| 23 | ACN | Accenture plc | -0.2% | -75.05% | Trim |
| 24 | GOOGL | Alphabet Inc-cl A | -0.2% | -5.30% | Trim |
| 25 | GOOG | Alphabet Inc-cl C | -0.2% | -5.33% | Trim |
| 26 | AAPL | Apple INC | -0.2% | -4.56% | Trim |
| 27 | V | Visa Inc-class A Shares | -0.2% | -3.26% | Trim |
| 28 | BKNG | Booking Holdings INC | -0.3% | -16.74% | Trim |
| 29 | CRM | Salesforce INC | -0.3% | -0.14% | Trim |
| 30 | LLY | Eli Lilly & Co | -0.3% | -10.56% | Trim |
| 31 | HDB | Hdfc Bank Ltd-adr | -0.4% | -0.83% | Trim |
| 32 | CRH | CRH plc | -0.5% | -20.90% | Trim |
| 33 | MSFT | Microsoft CORP | -0.8% | -1.13% | Trim |
| 34 | INTU | Intuit INC | -0.9% | -94.36% | Trim |
| 35 | BLD | Topbuild CORP | — | EXIT | Sold out |
| 36 | EBAY | Ebay INC | — | NEW | New buy |
| 37 | WY | Weyerhaeuser Co | — | EXIT | Sold out |
| 38 | ASML | ASML Holding N.V. | — | NEW | New buy |
| 39 | ASHGY | Ashtead Group PLC Spon Adr | — | EXIT | Sold out |
| 40 | LIN | Linde plc | — | NEW | New buy |
| 41 | BBVA | Banco Bilbao Vizcaya-sp Adr | — | NEW | New buy |
| 42 | NVO | Novo-nordisk A/s-spons Adr | — | EXIT | Sold out |
| 43 | KGSPY | Kingspan Group Plc-unsp Adr | — | NEW | New buy |
| 44 | TFC | Truist Financial CORP | — | EXIT | Sold out |
| 45 | RELX | Relx PLC - Spon Adr | — | EXIT | Sold out |
| 46 | ARGX | Argenx Se - Adr | — | NEW | New buy |
| 47 | CFG | Citizens Financial Group | — | NEW | New buy |
| 48 | SGPYY | Sage Group Plc-unspon Adr | — | EXIT | Sold out |
| 49 | EEM | Ishares Msci Emerging Market | — | EXIT | Sold out |
| 50 | CCI | Crown Castle INC | — | EXIT | Sold out |
| Period | Filed | Type | EDGAR |
|---|---|---|---|
| 2026-03-31 | 2026-05-07 | 13F-HR | View on EDGAR |
| 2025-12-31 | 2026-05-07 | Amendment | View on EDGAR |
| 2025-12-31 | 2026-01-15 | 13F-HR | View on EDGAR |
| 2025-09-30 | 2025-10-30 | 13F-HR | View on EDGAR |
| 2025-06-30 | 2025-07-22 | 13F-HR | View on EDGAR |
| 2025-03-31 | 2025-04-03 | 13F-HR | View on EDGAR |
| 2024-12-31 | 2025-01-15 | 13F-HR | View on EDGAR |
| 2024-09-30 | 2024-10-09 | 13F-HR | View on EDGAR |
| 2024-06-30 | 2024-07-08 | 13F-HR | View on EDGAR |
| 2024-03-31 | 2024-04-11 | 13F-HR | View on EDGAR |
| 2023-12-31 | 2024-01-09 | 13F-HR | View on EDGAR |
| 2023-09-30 | 2023-10-11 | 13F-HR | View on EDGAR |
| 2023-06-30 | 2023-07-24 | 13F-HR | View on EDGAR |
| 2023-03-31 | 2023-05-17 | 13F-HR | View on EDGAR |
| 2022-12-31 | 2023-01-26 | 13F-HR | View on EDGAR |
| 2022-09-30 | 2022-10-20 | 13F-HR | View on EDGAR |
| 2022-06-30 | 2022-08-10 | 13F-HR | View on EDGAR |
| 2022-03-31 | 2022-05-16 | 13F-HR | View on EDGAR |
| 2021-12-31 | 2022-01-31 | 13F-HR | View on EDGAR |
| 2021-09-30 | 2021-11-12 | 13F-HR | View on EDGAR |
| 2021-06-30 | 2021-08-19 | 13F-HR | View on EDGAR |
| 2021-03-31 | 2021-05-14 | 13F-HR | View on EDGAR |
| 2020-12-31 | 2021-02-05 | 13F-HR | View on EDGAR |
| 2020-09-30 | 2020-11-10 | 13F-HR | View on EDGAR |
| 2020-06-30 | 2020-08-10 | 13F-HR | View on EDGAR |
| 2020-03-31 | 2020-05-08 | 13F-HR | View on EDGAR |
| 2019-12-31 | 2020-01-28 | 13F-HR | View on EDGAR |
| 2019-09-30 | 2019-11-07 | 13F-HR | View on EDGAR |
| 2019-06-30 | 2019-07-26 | 13F-HR | View on EDGAR |
| 2019-03-31 | 2019-05-03 | 13F-HR | View on EDGAR |
| 2018-12-31 | 2019-01-25 | 13F-HR | View on EDGAR |
| 2018-09-30 | 2018-11-01 | 13F-HR | View on EDGAR |
| 2018-06-30 | 2018-08-06 | 13F-HR | View on EDGAR |
| 2018-03-31 | 2018-04-26 | 13F-HR | View on EDGAR |
| 2017-12-31 | 2018-02-07 | 13F-HR | View on EDGAR |
| 2017-09-30 | 2017-11-13 | 13F-HR | View on EDGAR |
| 2017-06-30 | 2017-08-14 | 13F-HR | View on EDGAR |
| 2017-03-31 | 2017-05-25 | 13F-HR | View on EDGAR |
| 2016-12-31 | 2017-02-14 | 13F-HR | View on EDGAR |
| 2016-09-30 | 2016-11-04 | 13F-HR | View on EDGAR |
| 2016-06-30 | 2016-07-19 | 13F-HR | View on EDGAR |
| 2016-03-31 | 2016-05-11 | 13F-HR | View on EDGAR |
| 2015-12-31 | 2016-02-12 | 13F-HR | View on EDGAR |
| 2015-09-30 | 2015-11-18 | 13F-HR | View on EDGAR |
| 2015-06-30 | 2015-08-11 | 13F-HR | View on EDGAR |
| 2015-03-31 | 2015-04-15 | 13F-HR | View on EDGAR |
| 2014-12-31 | 2015-02-03 | 13F-HR | View on EDGAR |
| 2014-09-30 | 2014-10-30 | 13F-HR | View on EDGAR |
| 2014-06-30 | 2014-07-23 | 13F-HR | View on EDGAR |
| 2014-03-31 | 2014-05-05 | 13F-HR | View on EDGAR |
| 2013-12-31 | 2014-01-27 | 13F-HR | View on EDGAR |
| 2013-09-30 | 2013-11-05 | 13F-HR | View on EDGAR |
| 2013-06-30 | 2013-08-07 | 13F-HR | View on EDGAR |
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