Montrusco Bolton Investments portfolio
Concentrated managerInvestment firmPortfolio 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.
Montrusco Bolton Investments reported a $5.8 bn portfolio of 85 positions to the SEC as of the end of Q3 2026. Its largest positions are NVDA, MSFT, GOOGL. During the quarter it opened Vertex Pharmaceuticals and CME Group.
Sections with a free account
What changed this quarter
85 positions with a change (10 new, 11 added to, 58 trimmed, 6 sold); also, 1 entered through an IPO. 12 are listed here: those of 0.5 points of the portfolio or more (up to 12).
- Mastercard−39%fewer sharesReduced3.7% → 2.7%
- JPMorgan Chase−31%fewer sharesReduced4.7% → 3.6%
- NVIDIA−13%fewer sharesReduced8.2% → 9.1%
- Vertex Pharmaceuticals+1.2 ppof portfolioNew— → 1.4%
- CME Group+1.2 ppof portfolioNew— → 1.3%
- Charles Schwab+1.1 ppof portfolioNew— → 1.2%
- Amazon.com−17%fewer sharesReduced5.8% → 5.6%
- Valero Energy−26%fewer sharesReduced2.6% → 3.2%
- Microsoft−12%fewer sharesReduced5.9% → 8.0%
- Broadcom−26%fewer sharesReduced3.7% → 2.9%
- Taiwan Semiconductor Manufacturing−31%fewer sharesReduced2.7% → 2.0%
- Alphabet−13%fewer sharesReduced6.1% → 5.7%
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
- NVIDIANVDA9.1%
- MicrosoftMSFT8.0%
- AlphabetGOOGL5.7%
- Amazon.comAMZN5.6%
- Meta PlatformsMETA3.7%
- Lam ResearchLRCX3.7%
- JPMorgan ChaseJPM3.6%
- DanaherDHR3.5%
- Micron TechnologyMU3.4%
- Valero EnergyVLO3.2%
- Idexx LaboratoriesIDXX2.9%
- BroadcomAVGO2.9%
- MastercardMA2.7%
- AmphenolAPH2.5%
- AppleAAPL2.5%
“Since”: first quarter of the current run, unbroken until today. In the details, prices are the quarter-end prices of the quarters in which it added shares, per the 13F. The manager may have bought at any price within each quarter; the SEC only publishes the value at quarter end.
Portfolio by sector
- ● Information Technology 36%
- ● Financials 13%
- ● Industrials 10%
- ● Communication Services 9%
- ● Health Care 9%
- ● Consumer Discretionary 8%
- ● Consumer Staples 4%
- ● Energy 4%
- ● Materials 4%
- ● Real Estate 2%
- ● No sector 1%
How its portfolio changed (8 quarters)
Q3 2026: 85
Q3 2026: 49%
Q3 2026: 11.2%
Traded turnover: the weight it bought plus the weight it sold in the quarter, divided by two, excluding price moves. The plain “turnover” in the header does include that effect. With a free account: the full history and sectors over time.
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
Investment firm, per its Form ADV of Mar 31, 2026 (medium confidence).
The data, as reported: MONTRUSCO BOLTON INVESTMENTS INC. (CRD 154475): Institutional mandates; 5.D assets by client type: banks 36%, pooled vehicles 30%, registered funds 16%, governments 9% (of $12.9 bn); 5.F 564 accounts, 7% non-discretionary; 5.D 343 clients, 10 individuals
The type comes from a rule applied to that data. If it looks wrong, tell us.
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