Green Century Capital Management
Green Century Capital Management is a Boston-based, nonprofit-owned investment adviser founded in 1991 that manages three fossil fuel-free mutual funds (Equity, International Index, Balanced) with combined AUM exceeding $1.2 billion, serving individual and institutional investors seeking environmentally responsible investment options with active shareholder advocacy.
- Company typePrivate
- Founded1991
- HeadquartersBoston, United States
- Headcount11–50
- GTM typeB2B and B2C
- OfferingServices
What Green Century Capital Management does
Green Century Capital Management is a privately-held, Boston-based investment adviser founded in 1991 that manages a family of three fossil fuel-free mutual funds: the Green Century Equity Fund (passive U.S. equity), the Green Century MSCI International Index Fund (passive international developed market equity), and the Green Century Balanced Fund (actively managed multi-asset). The firm is uniquely owned by nine environmental and public health nonprofit organizations, with 100% of net profits directed to those nonprofits' environmental campaigns. As of March 31, 2026, combined fund assets exceed $1.21 billion across Individual and Institutional share classes.
The firm's investment methodology combines proprietary environmental exclusionary screens (fossil fuels, tobacco, nuclear energy/weapons, GMOs, alcohol, gambling, adult entertainment, military weapons) with MSCI ESG Research ratings and financial quality assessment. Sub-advisory and day-to-day portfolio management is outsourced to Northern Trust Investments (and Trillium Asset Management for the Balanced Fund's equity sleeve), allowing the firm to focus resources on shareholder advocacy — an in-house program that engages portfolio companies on climate, plastics, and biodiversity issues and votes more than 600 proxies annually.
The business model is a recurring management fee structure with expense ratios ranging from 0.90% to 1.28% depending on fund and share class. Distribution is multi-channel: direct-to-consumer via website, phone, and mail; through financial advisors; and via major brokerage platforms including Charles Schwab and Fidelity. Customer segments include individual investors (IRA and taxable accounts, $1,000-$2,500 minimums) and institutional investors ($250,000 minimums).
Green Century Capital Management firmographics
Firmographics- Name
- Green Century Capital Management
- Legal name
- Green Century Capital Management, Inc.
- Website
- https://greencentury.com
- Company type
- Private
- Founded year
- 1991
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Green Century Capital Management is a Boston-based, nonprofit-owned investment adviser founded in 1991 that manages three fossil fuel-free mutual funds (Equity, International Index, Balanced) with combined AUM exceeding $1.2 billion, serving individual and institutional investors seeking environmentally responsible investment options with active shareholder advocacy.
- Ownership category
- akta.pro rank
Green Century Capital Management industry classification
Industry- Product category
- Sustainable Mutual Funds / ESG Asset Management
- NAICS
- Open-End Investment Funds (525910)
- SIC
- Finance Services (6199)
- akta.pro primary industry
- ESG Integration / Responsible Investment Funds (Broad ESG) (FSANAJAL)
- akta.pro secondary industries
- Climate / Clean Tech & Decarbonization Funds (FSANAJAA), ESG & Sustainability Research (FSACAGAH)
Keywords
Where Green Century Capital Management is headquartered
LocationHeadquarters
- HQ city
- Boston
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
Green Century Capital Management business model
Business model- GTM type
- B2B and B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Others
Revenue model
- Investment Management Fees: Green Century earns revenue through management fees charged on the Green Century Funds. The fees are calculated as a percentage of assets under management (expense ratios ranging from 0.90% to 1.28% depending on fund and share class). Revenue is recurring as long as assets remain invested.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Annual | International Index Fund Individual Investor Share Class (GCINX) |
| Subscription | Annual | International Index Fund Institutional Share Class (GCIFX) |
| Subscription | Annual | Equity Fund Individual Investor Share Class (GCEQX) |
| Subscription | Annual | Equity Fund Institutional Share Class (GCEUX) |
| Subscription | Annual | Balanced Fund Individual Investor Share Class (GCBLX) |
| Subscription | Annual | Balanced Fund Institutional Share Class (GCBUX) |
Go-to-market motion2 records
Distribution channels4 records
Marketing channels6 records
Green Century Capital Management product offering
Product offeringCore offering
Green Century Capital Management manages and distributes three fossil fuel-free, environmentally responsible mutual funds (Green Century Equity Fund, Green Century MSCI International Index Fund, and Green Century Balanced Fund) offered in Individual and Institutional share classes. The firm applies comprehensive ESG screens to exclude fossil fuels, tobacco, nuclear energy/weapons, GMOs, and other harmful industries, and pairs investments with an in-house shareholder advocacy program that engages portfolio companies on environmental issues. All net profits support the firm's nine nonprofit environmental and public health owners.
Product overview
Green Century Capital Management offers a family of three fossil fuel-free, environmentally responsible mutual funds: the Green Century MSCI International Index Fund (passive international equity), Green Century Equity Fund (passive U.S. equity), and Green Century Balanced Fund (actively managed multi-asset portfolio of stocks and bonds). Each fund applies comprehensive environmental screens excluding fossil fuels, tobacco, nuclear energy, and weapons, while employing ESG criteria and supporting green bond investments. All funds are available in Individual Investor and Institutional share classes, with sub-advisory services provided by Northern Trust.
Differentiator
Problem solved
Functional benefit
Brands
- Green Century MSCI International Index Fund: A fossil fuel-free index fund investing in international developed market stocks selected based on ESG criteria.
- Green Century Equity Fund
- Green Century Balanced Fund
Products and services
- Green Century Equity Fund A passively managed U.S. equity fund that invests in the MSCI KLD 400 ex Fossil Fuels Index, one of the longest-running sustainability indexes customized to exclude fossil fuel companies. Available in Individual Investor (GCEQX) and Institutional (GCEUX) share classes for investors seeking fossil fuel-free U.S. equity exposure.
- Green Century MSCI International Index Fund A fossil fuel-free index fund that tracks the MSCI World ex USA SRI ex Fossil Fuels Index, investing in stocks of approximately 175 large- and mid-cap companies in 22 developed markets outside the U.S. Available in Individual Investor (GCINX) and Institutional (GCIFX) share classes.
- Green Century Balanced Fund An actively managed multi-asset fund combining stocks and bonds built on environmental criteria and financial quality assessment. Includes green bond investments supporting climate mitigation, water protection, and renewable energy projects. Available in Individual Investor (GCBLX) and Institutional (GCBUX) share classes.
Quantifiable outcome
- Secured 16 policy changes from major corporations in 2025-2026 season including Bank of America, PepsiCo, and Ulta Beauty
- +3 more outcomes
Companies that use Green Century Capital Management
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles3 records
Green Century Capital Management technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
Green Century Capital Management partnerships and signals
Strategic signalPartnerships
Nine partnerships are on record, tiered core and notable.
- Northern Trust InvestmentscoreNorthern Trust serves as sub-advisor and portfolio manager for the Green Century Equity Fund and Green Century MSCI International Index Fund, providing day-to-day portfolio management. The firm has managed socially responsible portfolios for more than 25 years and is a leading provider of investment management and fiduciary services.
- Northern Trust Asset ManagementcoreNorthern Trust Asset Management serves as sub-advisor for the Green Century Balanced Fund, providing day-to-day portfolio management with a team of five experienced portfolio managers. Northern Trust is a world-class asset manager with expertise across equity, fixed income, asset allocation, tax management, and sustainability.
- MSCI ESG ResearchcoreMSCI ESG Research provides environmental, social and governance (ESG) ratings and research used to develop the MSCI sustainability indexes that the Green Century Funds track, including the MSCI KLD 400 ex Fossil Fuels Index and MSCI World ex USA SRI ex Fossil Fuels Index.
- Trillium Asset ManagementcoreTrillium Asset Management serves as subadvisor (day-to-day portfolio manager) for the Green Century Balanced Fund, with supervision from Green Century.
- Distribution Services, LLCcoreDistribution Services, LLC is an unaffiliated broker-dealer that distributes the Green Century Funds. Green Century Funds are available only through a prospectus.
- U.S. SIF (Sustainable Investment Forum)notableGreen Century President Leslie Samuelrich served on U.S. SIF's Board of Directors for two terms. Erin Gray holds a seat on U.S. SIF's Conference Agenda Committee. U.S. SIF is a forum for sustainable investing professionals.
- Environmental Nonprofit Owners (9 organizations)coreNine nonprofit organizations own Green Century: California PIRG, NJ PIRG, COPIRG, ConnPIRG, Fund for the Public Interest, MASSPIRG, MOPIRG, PIRGIM, and WASHPIRG. These organizations champion recycling, cleaner air, and renewable energy. 100% of Green Century's net profits support these organizations.
- Charles SchwabnotableCharles Schwab platform offers Green Century Funds, making them accessible to Schwab investors seeking sustainable investment options.
- FidelitynotableFidelity platform offers Green Century Funds, making them accessible to Fidelity investors seeking sustainable investment options.
Scale indicators9 records
Recent moves9 records
Expansion highlights4 records
Green Century Capital Management competitors and assessment
Company assessmentDirect peers
- Domini Impact Investments: Domini is a pioneer in socially responsible investing offering mutual funds (Domini Impact Equity Fund, etc.) with screens excluding fossil fuels and other harmful industries. It is one of the closest direct peers given shared mission-driven mutual fund focus and similar founding-era heritage.
- Parnassus Investments: Parnassus offers a family of ESG-screened mutual funds (Parnassus Core Equity, Parnassus Mid Cap, Parnassus Fixed Income) that compete directly with Green Century in the fossil fuel-free / sustainable U.S. equity and balanced fund categories.
- Calvert Impact Capital: Calvert operates a family of ESG mutual funds (Calvert Equity, Calvert International Equity, Calvert Bond) with fossil fuel exclusions and shareholder advocacy — a direct competitor to Green Century in retail and institutional sustainable investing channels.
- Trillium Asset Management: Trillium is an ESG investment manager and serves as sub-advisor to the Green Century Balanced Fund. It also runs its own mutual fund strategies, making it both a partner and a directly comparable ESG peer in sustainable fund management.
- Impax Asset Management: Impax (formed from the merger of Pax World Funds and Impax) is a global specialist asset manager focused on the transition to a more sustainable economy, offering ESG equity and fixed income strategies that compete with Green Century's sustainable mutual fund lineup.
- Praxis Mutual Funds: Praxis offers a family of faith-based and ESG-screened mutual funds (Praxis Value Index, Praxis Growth Index, Praxis Balanced) that compete in the values-aligned mutual fund space with similar exclusionary screening methodology.
- Boston Common Asset Management: Boston Common is an ESG-focused investment manager based in Boston that runs sustainable equity strategies for institutional and individual investors, sharing Green Century's Boston base, fossil fuel exclusion stance, and shareholder advocacy approach.
Emerging players
- Aspiration: Aspiration is a sustainable-focused fintech offering fossil fuel-free investment products and banking services to retail consumers, representing an emerging digital-native competitor targeting the same climate-conscious retail investor segment.
- Ethic: Ethic is a technology-driven ESG wealth management platform offering personalized sustainable portfolios to financial advisors and individuals, representing a more modern, tech-enabled adjacent competitor in the personalized sustainable investing space.
Broad incumbents
- Natixis Investment Managers: Natixis operates multiple ESG and sustainable investing affiliates (Mirova, Loomis Sayles ESG) that offer fossil fuel-free and impact strategies, competing with Green Century from a much larger global asset management platform with broader distribution.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat3 records
Key risks6 records
Key highlights6 records
Customer concentration
Green Century Capital Management social profiles
Digital presenceGreen Century Capital Management financial estimates
Financial estimateRevenue estimate
Valuation estimate
Green Century Capital Management leadership team
Management profileNumber of profiles
Profiles9 records
Green Century Capital Management funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Green Century Capital Management M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Green Century Capital Management
What does Green Century Capital Management do?
Green Century Capital Management manages and distributes three fossil fuel-free, environmentally responsible mutual funds (Green Century Equity Fund, Green Century MSCI International Index Fund, and Green Century Balanced Fund) offered in Individual and Institutional share classes. The firm applies comprehensive ESG screens to exclude fossil fuels, tobacco, nuclear energy/weapons, GMOs, and other harmful industries, and pairs investments with an in-house shareholder advocacy program that engages portfolio companies on environmental issues. All net profits support the firm's nine nonprofit environmental and public health owners.
Is Green Century Capital Management a public or private company?
Green Century Capital Management is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was Green Century Capital Management founded?
Green Century Capital Management was founded in 1991. It employs 11 to 50 people.
Where is Green Century Capital Management based?
Green Century Capital Management is headquartered in Boston, United States, in the North America region.
How does Green Century Capital Management make money?
One revenue line is on record: investment Management Fees.
Who are Green Century Capital Management's main competitors?
Direct peers on record are Domini Impact Investments, Parnassus Investments, Calvert Impact Capital, Trillium Asset Management, Impax Asset Management, Praxis Mutual Funds and Boston Common Asset Management. Emerging players are Aspiration and Ethic. Natixis Investment Managers is listed as a broad incumbent.
Does Green Century Capital Management have an API?
No public API is recorded for Green Century Capital Management.
What industry is Green Century Capital Management in?
Green Century Capital Management's product category is Sustainable Mutual Funds / ESG Asset Management. Its primary akta.pro industry code is FSANAJAL, ESG Integration / Responsible Investment Funds (Broad ESG), with a secondary code of FSANAJAA, Climate / Clean Tech & Decarbonization Funds. Its NAICS code is 525910 and its SIC code is 6199.