# Trillium Asset Management

> Trillium Asset Management is an SEC-registered investment advisory firm in Boston, MA, registered since 1982, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated September 3, 2026.

- CRD: 110901
- Filed as: TRILLIUM ASSET MANAGEMENT
- Legal name: Trillium Asset Management, LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Location: Boston, MA
- Filing period: October 2026
- Form ADV filing dated: September 3, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/110901
- AdvisorCensus page: https://advisorcensus.com/firm/trillium-asset-management-boston-ma-110901

## Quick answers

**How is Trillium Asset Management compensated?**
On its Form ADV (Item 5.E, October 2026), Trillium Asset Management reports these compensation arrangements: a percentage of assets under its management; fixed fees (other than subscription fees).

**Where is Trillium Asset Management located?**
Trillium Asset Management's principal office is in Boston, MA, according to its Form ADV; the October 2026 filing also lists 1 other office (Schedule D, Section 1.F).

**Is Trillium Asset Management registered with the SEC or a state?**
Trillium Asset Management is an SEC-registered investment advisory firm, registered since 1982. Status as filed: Approved. CRD 110901.

**How much does Trillium Asset Management manage?**
Trillium Asset Management reports $4,305,067,957 in regulatory assets under management in its Form ADV filing dated September 3, 2026 (100% discretionary).

**How have Trillium Asset Management's assets and staff changed since 2021?**
In the Form ADV data for Trillium Asset Management: Regulatory assets under management: $4,068,848,331 in the October 2021 data and $4,305,067,957 in the October 2026 data, up 6%. Total employees: 38 in October 2021 and 53 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Trillium Asset Management serve?**
By number of clients on Form ADV Item 5.D: individuals (other than high net worth individuals) (1,131); high net worth individuals (600); charitable organizations (222).

**Which custodians does Trillium Asset Management use?**
Trillium Asset Management's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Charles Schwab & Co., Inc. and UBS Financial Services Inc. as custodians holding 10% or more of its separately managed account assets.

**Does Trillium Asset Management 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/110901

**What changed in Trillium Asset Management's recent Form ADV filings?**
In the October 2026 filing data: Changed its office addresses in San Francisco, CA.

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management
- Fixed fees (other than subscription fees)

### Custodians (Schedule D, Section 5.K(3))
- Charles Schwab & Co., Inc.
- UBS 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: $4,305,067,957
- Discretionary: $4,305,067,957
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Individuals (other than high net worth individuals) | 1,131 | $1,532,883,820 |
| High net worth individuals | 600 | $760,875,733 |
| Banking or thrift institutions | 0 | $0 |
| Investment companies | 2 | $789,723,709 |
| Business development companies | 0 | $0 |
| Pooled investment vehicles (other than investment companies and business development companies) | 33 | $201,163,218 |
| Pension and profit sharing plans (but not the plan participants or government pension plans) | 7 | $31,693,673 |
| Charitable organizations | 222 | $824,595,174 |
| State or municipal government entities (including government pension plans) | 0 | $0 |
| Other investment advisers | 0 | $0 |
| Insurance companies | 0 | $0 |
| Sovereign wealth funds and foreign official institutions | 0 | $0 |
| Corporations or other businesses not listed above | 48 | $164,132,630 |
| Other | 0 | $0 |

### Advisory services (Item 5.G)
- Portfolio management for individuals and/or small businesses
- Portfolio management for investment companies (and business development companies)
- Portfolio management for pooled investment vehicles (other than investment companies)
- Portfolio management for businesses (other than small businesses) or institutional clients
- Selection of other advisers (including private fund managers)
- Publication of periodicals or newsletters
- Educational seminars/workshops

### Firm details
- Registered since: 1982 (43 years)
- Employees: 53 total, 38 performing advisory functions
- Wrap fee program participation: Yes
- States registered or notice-filed: AK, AL, AR, AZ, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MA, MD, ME, MI, MN, MO, MS, MT, NC, ND, NE, NH, NJ, NM, NV, NY, OH, OK, OR, PA, PR, RI, SC, SD, TN, TX, UT, VA, VI, VT, WA, WI, WV, WY
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Other offices (Schedule D, Section 1.F), as of the October 2026 filing
- San Francisco, CA

### Websites listed on Form ADV (Item 1.I)
- trilliumassetmanagement.com
- trilliuminvest.com
- trilliummutualfunds.com
- LinkedIn @trillium-asset-management

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $4,068,848,331 | 38 | March 29, 2021 |
| October 2022 | $5,676,112,804 | 40 | March 30, 2022 |
| October 2023 | $4,471,975,243 | 51 | March 30, 2023 |
| October 2024 | $4,966,006,715 | 54 | May 20, 2024 |
| October 2025 | $5,012,664,360 | 50 | May 12, 2025 |
| October 2026 | $4,305,067,957 | 53 | September 3, 2026 |

Regulatory assets under management: $4,068,848,331 in the October 2021 data and $4,305,067,957 in the October 2026 data, up 6%.
Total employees: 38 in October 2021 and 53 in October 2026.

## Changes in the filing (last 12 months)

### October 2026
- Changed its office addresses in San Francisco, CA.

### August 2026
- Updated its list of owners and control persons (Schedule A).

### April 2026
- Regulatory assets under management went from $5,012,664,360 to $4,305,067,957 (-14%).
- Registered or notice-filed in AK, AL, AR, IA, KS, MS, ND, NE, OK, PR, SD, VI, WV.
- Updated its list of owners and control persons (Schedule A).

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Trillium Asset Management (CRD 110901): Form ADV filing data as of October 2026.