Boston Common Asset Management portfolio
Type not verifiedPortfolio as of Sep 30, 2026 (Q3 2026) · filed with the SEC on Oct 13, 2026 · data updated on Nov 5, 2026 · Q3 2026 13F (filing) ↗ · all its 13F filings ↗
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Boston Common Asset Management reported a $1.7 bn portfolio of 178 companies (181 positions, counting each share class separately) to the SEC as of the end of Q3 2026. Its largest positions are TSM, GOOGL, MSFT. During the quarter it exited CRH public.
Sections with a free account
What changed this quarter
165 positions with a change (7 new, 104 added to, 41 trimmed, 13 sold); also, 1 entered through an IPO. 4 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- CRH public−1.0 ppof portfolioSold out1.0% → —
- Hewlett Packard Enterprise+539%more sharesIncreased0.1% → 1.1%
- Novartis−90%fewer sharesReduced0.9% → 0.1%
- Applied Materials−47%fewer sharesReduced2.1% → 0.8%
The figure on the right: for positions added to or trimmed, the change in the number of shares (%); for new and sold ones, the points of the portfolio moved (pp). Below, the portfolio weight before → after. Traded weight: what it bought or sold, excluding price effects.
Top holdings
- Taiwan Semiconductor ManufacturingTSM6.7%
- AlphabetGOOGL · GOOG5.1%
- MicrosoftMSFT5.0%
- NVIDIANVDA4.8%
- AppleAAPL4.5%
- BroadcomAVGO2.5%
- VisaV1.9%
- MerckMRK1.8%
- Micron TechnologyMU1.7%
- Morgan StanleyMS1.7%
- Eli LillyLLY1.6%
- Quest DiagnosticsDGX1.4%
- WabtecWAB1.2%
- Colgate-palmoliveCL1.2%
- HubbellHUBB1.2%
Portfolio by sector
- ● Information Technology 32%
- ● Financials 14%
- ● No sector 14%
- ● Health Care 10%
- ● Communication Services 9%
- ● Industrials 8%
- ● Consumer Discretionary 5%
- ● Consumer Staples 3%
- ● Materials 2%
- ● Real Estate 1%
- ● Utilities 1%
13F filings with amendments or confidential positions
- 13F Q4 2025 ↗filed Jan 15, 2026Amendment of May 7, 2026 (replaces the original) ↗
Stakes above 5% (13D/13G)
Companies where this filer reported holding 5% or more of the shares. It is the figure from its latest filing on each one; history since December 2024.
How we classify it
Type not verified: we have not assigned a type because we found no document that is enough to tell. Most 13F filers are in this situation: we only review in depth those that meet the portfolio criteria.
Not counted as a concentrated manager: its portfolio is not within 5 to 100 positions; its top 10 positions are under 45%. Its portfolio is shown all the same, but it is left out of manager counts, the consensus and the ranking. How this is decided
Managers of a similar size
A 13F portfolio value between a third and three times this one, whatever the type of filer. It is not a comparison of what they hold.
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