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Boston Trust Walden Company
Stephen J. Amyouny · Asset Manager · Value
Boston Trust Walden Company is an independent, employee-owned investment management firm headquartered in Boston, Massachusetts. Established in 1970, the firm provides investment management and fiduciary services to institutional and private wealth clients. It is recognized as a pioneer in integrating environmental, social, and governance (ESG) factors into the investment process. The firm was formed by the 2019 merger of Boston Trust & Investment Management Company and its ESG-focused division, Walden Asset Management, which was founded in 1975. Boston Trust Walden focuses on identifying high-quality companies with sustainable business models and strong financial underpinnings. With a commitment to principled investing, the firm emphasizes long-term, risk-adjusted returns and active shareowner engagement. Its employee-ownership structure supports an independent perspective and alignment with client interests through full market cycles.
Simulated Performance
| Metric | Value |
|---|---|
| Total return | +22.0% |
| YTD return | +13.5% |
| Sharpe ratio | 3.92 |
| Win rate | 63% |
| AUM | $4.1B |
| Inception | Oct 1, 2025 |
| Updated | Sep 11, 2026 |
Institution Status
| Field | Value |
|---|---|
| AUM | $4.1B |
| Turnover | Low (<15%) |
| Avg holding | 18 Months |
| Inception | Oct 1, 2025 |
| Website | https://www.bostontrustwalden.com/ |
Current Holdings
Updated on Sep 11, 2026.
| Ticker | Name | Portfolio % | Return |
|---|---|---|---|
| GOOGL | Alphabet Inc Class A | 12.7% | +33.0% |
| MSFT | Microsoft Corporation | 11.6% | +3.2% |
| AAPL | Apple Inc | 11.2% | +26.4% |
| NVDA | NVIDIA Corporation | 7.0% | +13.0% |
| JPM | JPMorgan Chase & Co | 6.3% | +14.9% |
| V | Visa Inc. Class A | 4.2% | +8.0% |
| QLYS | Qualys Inc | 4.1% | +25.5% |
| DCI | Donaldson Company Inc | 4.1% | +7.9% |
| ATR | AptarGroup Inc | 4.0% | -5.2% |
| JNJ | Johnson & Johnson | 3.9% | +33.8% |
| HUBB | Hubbell Inc | 3.5% | +4.3% |
| AIT | Applied Industrial Technologies | 3.4% | +22.9% |
| WTS | Watts Water Technologies Inc | 3.2% | +24.8% |
| CINF | Cincinnati Financial Corporation | 3.1% | +5.0% |
| CSCO | Cisco Systems Inc | 3.0% | +19.6% |
| LFUS | Littelfuse Inc | 3.0% | +4.7% |
| CBSH | Commerce Bancshares Inc | 3.0% | +0.0% |
| GMED | Globus Medical | 3.0% | -5.8% |
| CFR | Cullen/Frost Bankers Inc | 2.9% | +27.1% |
| HALO | Halozyme Therapeutics Inc | 2.9% | -2.7% |
Recent activity
| Date | Action | Ticker | Weight |
|---|---|---|---|
| Sep 7, 2026 | BUY | CINF | 3.0% → 3.1% |
| Sep 7, 2026 | BUY | WTS | 3.2% → 3.2% |
| Sep 7, 2026 | BUY | HALO | 0.0% → 2.9% |
| Sep 7, 2026 | BUY | AIT | 3.3% → 3.4% |
| Sep 7, 2026 | BUY | DCI | 4.0% → 4.1% |
Investment Style Analysis
Boston Trust Walden Company is widely recognized for employing a Value strategy. As of Sep 11, 2026, the firm oversees approximately $4.1B in assets under management (AUM). The portfolio demonstrates a clear preference for the Software - Infrastructure and Internet Content & Information sectors, reflecting a high-conviction approach to capital allocation.
Recent Market Moves
During the latest rebalancing period ending Sep 7, Boston Trust Walden Company made a significant move by increasing exposure to CINF. This adjustment aligns with the fund's dynamic approach to risk management and capital deployment in current market conditions.
Investment Philosophy
Boston Trust Walden’s investment philosophy is centered on Principled Investing, which combines rigorous financial analysis with the integration of environmental, social, and governance (ESG) factors. The firm believes that high-quality companies with durable business models, consistent profitability, and strong governance are best positioned to deliver superior long-term, risk-adjusted returns. Their strategy focuses on bottom-up security selection, targeting companies with sustainable competitive advantages and prudent management. A key component of their philosophy is active ownership, where they engage with portfolio companies to encourage responsible corporate practices and mitigate systemic risks. This disciplined, quality-oriented approach is applied across various asset classes to achieve consistent results throughout market cycles.
Disclaimer
The content provided on this page, including the simulated portfolio performance, holdings analysis, and AI-generated insights, is for informational and educational purposes only. It does not constitute financial advice, investment recommendations, or an offer to buy or sell any securities. All data is derived from historical SEC 13F filings and other public disclosures, which have a reporting lag. The "Simulated Performance" is a hypothetical reconstruction based on past disclosures and does not represent the actual returns of the institution. Past performance is not indicative of future results. Tritonix.ai is not affiliated with Boston Trust Walden Company.
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Frequently asked questions
How is the simulated portfolio for Boston Trust Walden Company constructed?
This simulation is powered by Tritonix AI using official SEC filings. We focus on the "Best Ideas" by filtering for only the Top 20 largest holdings and rebalancing them to 100%. The simulation tracks performance starting from Oct 1, 2025. Our AI monitors for updates every Monday to capture major shifts. This concentrated approach highlights the manager's true stock-picking skill and mirrors their actual investment returns.
What is Boston Trust Walden Company's largest holding?
As of the latest filing, Boston Trust Walden Company's top position is Alphabet Inc Class A (GOOGL), representing 12.7% of the portfolio. This reflects a high-conviction bet by the institution.
What is Boston Trust Walden Company's historical performance and risk profile?
Our simulation indicates a total return of +22.0% with a win rate of 63%. Notably, the portfolio maintains a Sharpe Ratio of 3.92, suggesting an exceptional level of risk-adjusted returns compared to the broader market.
What sectors does Boston Trust Walden Company primarily invest in?
Boston Trust Walden Company has a strong preference for the Software - Infrastructure sector, which makes up 15.7% of their disclosed assets. The portfolio also has exposure to Internet Content & Information, indicating a specific thematic focus.
Is Boston Trust Walden Company's portfolio concentrated or diversified?
Boston Trust Walden Company runs a moderately concentrated portfolio with 20 disclosed positions. The top 3 holdings alone account for 35.5% of the total portfolio weight, suggesting a strategy that favors broader market exposure.
How has Boston Trust Walden Company performed in 2026?
Our AI-simulated model portfolio for Boston Trust Walden Company tracks a Year-to-Date (YTD) return of +13.5%. This metric helps investors gauge the institution's effectiveness in the current market environment.
Does Stephen J. Amyouny manage Boston Trust Walden Company directly?
Yes, Stephen J. Amyouny serves as the key portfolio manager for Boston Trust Walden Company, overseeing the investment strategy and final capital allocation decisions.