# Trillium Asset Management Trillium Asset Management is an Asset Manager based in Boston, United States. ## Overview - **Organization type:** Asset Manager - **Headquarters:** Boston, United States - **Region:** North America - **Address:** Boston, MA, United States - **Founded:** 1982 - **Assets under management:** Undisclosed - **Website:** trilliuminvest.com - **LinkedIn:** https://www.linkedin.com/company/trillium-asset-management ## Regulatory record - **CRD number:** 110901 - **SEC file number:** 801-17958 - **Registration status:** APPROVED - **Latest Form ADV filing:** 2026-03-27T05:00:00.000Z - **Reports private funds:** Yes - **Private funds reported:** 0 - **IAPD record:** https://adviserinfo.sec.gov/firm/summary/110901 ## About Trillium Asset Management opened its doors in Boston in 1982, founded by Joan Bavaria, who built the firm on the conviction that investors could demand better behavior from public companies. Matthew Patsky, who joined in 2009 and now serves as CEO, has overseen the firm's evolution from a niche responsible-investing boutique into a multi-strategy ESG asset manager. The firm remains employee-owned and independent, an unusual structure that has allowed it to maintain its advocacy-first posture without the pressure of a parent balance sheet. The firm runs concentrated public equity portfolios — US large-cap, small-mid cap, and global strategies — alongside a sustainable fixed-income offering. Each portfolio applies negative screens (excluding fossil fuels, weapons, tobacco) and positive tilts toward companies scoring high on environmental and social metrics. The investment team integrates shareholder advocacy directly into the process, filing proxy resolutions and negotiating directly with corporate boards. Trillium has pressed companies on climate disclosure, board diversity, and labor practices, often co-filing with institutional allies like public pension funds. Its portfolios have historically held names such as Microsoft, Apple, and First Solar, while deliberately excluding the entire energy sector. The firm's scale is modest by institutional standards — assets under management are not publicly disclosed — but its influence is amplified by the advocacy platform. Trillium operates strictly from its Boston headquarters, without satellite offices. The firm is not a multi-family office and does not run private funds or direct-deal vehicles; its architecture is that of a traditional registered investment advisor, managing separate accounts for individuals, family offices, foundations, and religious institutions. No recent fund launches or strategy pivots have been publicly announced. Trillium's genuine structural differentiator is its four-decade refusal to decouple investment management from direct-action shareholder advocacy. Most asset managers that now market ESG strategies added them as a product line; Trillium was built entirely around the premise that equity ownership is a mechanism for corporate reform. Admission to its strategies has historically required clients to align with that worldview, creating a self-selecting investor base that allows the proxy-voting and engagement team unusual latitude to pursue contentious resolutions without fear of client blowback. ## Sectors - Sustainable & ESG - Public Equities ## People - Matthew Patsky — CEO ## Questions ### How does Trillium Asset Management integrate shareholder advocacy with portfolio management? Advocacy is not a separate product — it is embedded in the investment process. Trillium's research team identifies portfolio companies with unresolved ESG risks, and the firm files proxy resolutions or engages directly with management and boards. Historical campaigns have targeted climate transition plans, boardroom diversity, and human rights policies. Clients investing in Trillium strategies are effectively opting into this activism, which the firm views as central to its fiduciary duty. ### What investment strategies does Trillium Asset Management offer? Trillium runs US large-cap core, small-to-mid cap, and global equity strategies, along with a sustainable fixed-income offering. All strategies apply fossil-fuel-free and weapons-exclusion screens while overweighting companies with strong environmental and social performance. The firm manages separate accounts rather than publicly traded ETFs or mutual funds, which gives the investment team discretion over concentrated, high-conviction positions. ### How does Trillium's fossil-fuel-free screen work in practice? Trillium excludes any company deriving revenue from fossil fuel extraction, processing, or electricity generation from hydrocarbons. The screen also catches major utilities whose generation mix is heavily carbon-based, though the firm has shown flexibility for companies with credible transition plans. This policy, in place years before most peers, means Trillium's equity portfolios carry a structural underweight to energy and utilities relative to broad benchmarks. ### What is Trillium Asset Management's ownership structure? The firm is privately held and 100% employee-owned. Matthew Patsky has led the firm since 2009 as CEO, and the employee-ownership model is designed to prevent a misalignment between commercial incentives and the firm's advocacy mission — no external shareholders or parent company can dilute the ESG mandate to chase asset-gathering or short-term profitability. ## Related profiles - [Trill Impact](https://altss.com/profile/trill-impact) - [Trilogy International Partners](https://altss.com/profile/trilogy-international-partners) --- Last updated: 2026-06-03T20:00:00.000Z Canonical page: https://altss.com/profile/trillium-asset-management Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology