# Green Century Capital Management Inc

> Green Century Capital Management Inc is an SEC-registered investment advisory firm in Boston, MA, registered since 1991, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated September 30, 2026.

- CRD: 112442
- Filed as: GREEN CENTURY CAPITAL MANAGEMENT INC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: September 30, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/112442
- AdvisorCensus page: https://advisorcensus.com/firm/green-century-capital-management-inc-boston-ma-112442

## Quick answers

**How is Green Century Capital Management Inc compensated?**
On its Form ADV (Item 5.E, October 2026), Green Century Capital Management Inc reports these compensation arrangements: a percentage of assets under its management. The amounts are in Item 5 of its Form ADV Part 2A brochure.

**Where is Green Century Capital Management Inc located?**
Green Century Capital Management Inc's principal office is in Boston, MA, according to its Form ADV.

**Is Green Century Capital Management Inc registered with the SEC or a state?**
Green Century Capital Management Inc is an SEC-registered investment advisory firm, registered since 1991. Status as filed: Approved. CRD 112442.

**How much does Green Century Capital Management Inc manage?**
Green Century Capital Management Inc reports $1,358,315,122 in regulatory assets under management in its Form ADV filing dated September 30, 2026 (100% discretionary).

**How have Green Century Capital Management Inc's assets and staff changed since 2021?**
In the Form ADV data for Green Century Capital Management Inc: Regulatory assets under management: $1,053,780,845 in the October 2021 data and $1,358,315,122 in the October 2026 data, up 29%. Total employees: 13 in October 2021 and 16 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Green Century Capital Management Inc serve?**
By number of clients on Form ADV Item 5.D: investment companies (3); other (1).

**Which custodians does Green Century Capital Management Inc use?**
Green Century Capital Management Inc's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists UMB Financial Services, Inc. as a custodian holding 10% or more of its separately managed account assets.

**Does Green Century Capital Management Inc report any disciplinary disclosures?**
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/112442

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management

### Custodians (Schedule D, Section 5.K(3))
- UMB Financial Services, Inc.

Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.

### Regulatory assets under management (Item 5.F)
- Total: $1,358,315,122
- Discretionary: $1,358,315,122
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Individuals (other than high net worth individuals) | 0 | Not reported |
| High net worth individuals | 0 | Not reported |
| Banking or thrift institutions | 0 | Not reported |
| Investment companies | 3 | $1,357,770,937 |
| Business development companies | 0 | Not reported |
| Pooled investment vehicles (other than investment companies and business development companies) | 0 | Not reported |
| Pension and profit sharing plans (but not the plan participants or government pension plans) | 0 | Not reported |
| Charitable organizations | 0 | Not reported |
| State or municipal government entities (including government pension plans) | 0 | Not reported |
| Other investment advisers | 0 | Not reported |
| Insurance companies | 0 | Not reported |
| Sovereign wealth funds and foreign official institutions | 0 | Not reported |
| Corporations or other businesses not listed above | 0 | Not reported |
| Other | 1 | $544,185 |

### Advisory services (Item 5.G)
- Portfolio management for investment companies (and business development companies)
- Selection of other advisers (including private fund managers)

### Firm details
- Registered since: 1991 (35 years)
- Employees: 16 total, 6 performing advisory functions
- Wrap fee program participation: No
- States registered or notice-filed: CO
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- [greencentury.com](https://greencentury.com)
- LinkedIn @green-century-capital-management
- X @GREEN__CENTURY
- YouTube @greencentury8312

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $1,053,780,845 | 13 | September 7, 2021 |
| October 2022 | $998,345,717 | 11 | September 22, 2022 |
| October 2023 | $1,123,846,320 | 13 | September 26, 2023 |
| October 2024 | $1,284,681,138 | 15 | September 30, 2024 |
| October 2025 | $1,284,681,138 | 15 | September 30, 2024 |
| October 2026 | $1,358,315,122 | 16 | September 30, 2026 |

Regulatory assets under management: $1,053,780,845 in the October 2021 data and $1,358,315,122 in the October 2026 data, up 29%.
Total employees: 13 in October 2021 and 16 in October 2026.

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Green Century Capital Management Inc (CRD 112442): Form ADV filing data as of October 2026.