Wellesley Asset Management, Inc.
- Regulatory AUM
- $2.0B
- Discretionary
- $2.0B
- Clients
- 1,296
- Avg AUM / client
- $1.5M
- Accounts
- 1,956
- Employees
- 30
AUM over time
Annual snapshots from Form ADV filings · as of Mar 30, 2026
Investments (13F portfolio — 54 positions, $952,526,299)
13F period Mar 31, 2026| # | Issuer | Class | Value | Shares | % of 13F | % of AUM |
|---|---|---|---|---|---|---|
| 1 | Box Us | 9/15/2029 | $45,329,636 | 51,181,000 | 4.76% | 2.28% |
| 2 | Vsh Us | 9/15/2030 | $39,561,775 | 41,311,000 | 4.15% | 1.99% |
| 3 | Syna Us | 12/1/2031 | $36,151,777 | 34,325,000 | 3.8% | 1.82% |
| 4 | Pcg Us | 12/1/2027 | $35,547,420 | 34,085,000 | 3.73% | 1.79% |
| 5 | Hae Us | 6/1/2029 | $34,807,620 | 38,253,000 | 3.65% | 1.75% |
| 6 | Itri Us | 7/15/2030 | $34,376,084 | 35,995,000 | 3.61% | 1.73% |
| 7 | Akam Us | 9/1/2027 | $33,877,408 | 29,005,000 | 3.56% | 1.7% |
| 8 | Bl Us | 6/1/2029 | $33,696,273 | 36,922,000 | 3.54% | 1.69% |
| 9 | Gbx Us | 4/15/2028 | $33,016,638 | 28,469,000 | 3.47% | 1.66% |
| 10 | Mth Us | 5/15/2028 | $32,900,355 | 33,972,000 | 3.45% | 1.65% |
| 11 | On Us | 3/1/2029 | $32,015,952 | 32,595,000 | 3.36% | 1.61% |
| 12 | Livn Us | 3/15/2029 | $30,500,052 | 27,603,000 | 3.2% | 1.53% |
| 13 | Gwre Us | 11/1/2029 | $30,266,505 | 32,234,000 | 3.18% | 1.52% |
| 14 | Four Us | 8/1/2027 | $29,509,431 | 31,386,000 | 3.1% | 1.48% |
| 15 | Ddog Us | 12/1/2029 | $29,397,823 | 30,305,000 | 3.09% | 1.48% |
| 16 | Psn Us | 3/1/2029 | $27,974,740 | 29,685,000 | 2.94% | 1.4% |
| 17 | Mchp Us | 6/1/2030 | $27,714,606 | 27,869,000 | 2.91% | 1.39% |
| 18 | Gpn Us | 3/1/2031 | $26,726,727 | 32,113,000 | 2.81% | 1.34% |
| 19 | Nvst Us | 8/15/2028 | $25,406,929 | 25,419,000 | 2.67% | 1.28% |
| 20 | Wgo Us | 1/15/2030 | $23,994,041 | 26,517,000 | 2.52% | 1.2% |
| 21 | Amph Us | 3/15/2029 | $23,622,632 | 26,026,000 | 2.48% | 1.19% |
| 22 | Prgs Us | 3/1/2030 | $22,187,860 | 26,021,000 | 2.33% | 1.11% |
| 23 | Rgen Us | 12/15/2028 | $22,112,378 | 24,481,000 | 2.32% | 1.11% |
| 24 | Lmat Us | 2/1/2030 | $21,216,686 | 19,835,000 | 2.23% | 1.07% |
| 25 | Dbx Us | 3/1/2028 | $19,915,259 | 22,397,000 | 2.09% | 1.0% |
Top 25 of 54 positions from the manager's latest Form 13F · source filing (EDGAR) ↗. 13F covers long US-listed positions only. "% of AUM" is share of the firm's total regulatory AUM (Form ADV Item 5.F).
Who they serve
| Client type | Clients | AUM | % of AUM |
|---|---|---|---|
| Individuals (non-high net worth) | 958 | $394M | 19.8% |
| High net worth individuals | 288 | $487M | 24.5% |
| Investment companies | 3 | $781M | 39.2% |
| Pooled investment vehicles (non-investment companies) | 1 | $138M | 6.92% |
| Pension and profit sharing plans | 22 | $127M | 6.35% |
| Charitable organizations | 12 | $44.1M | 2.22% |
| Insurance companies | 3 | $11.1M | 0.56% |
| Corporations and other businesses | 9 | $10.2M | 0.51% |
Private funds (2)
Reported in Form ADV Section 7.B.(1), filing of Jul 2024 · $137M combined gross assets
| Fund | Type | Domicile | Gross assets | Owners |
|---|---|---|---|---|
| Brenton Partners, L.P. | Hedge Fund | Delaware | $103M | 82 |
| Brenton Partners Ii, L.P. master | Hedge Fund | Delaware | $34.8M | 26 |
People (25)
roster as of Jul 20, 2026| Name | Role / title | Credentials | With firm since | Ownership |
|---|---|---|---|---|
| Miller, Greg | Founder, Trustee Of The Greg Miller Trust | Jul 1991 (35y) | Less than 5% | |
| Hernberg, Maureen, Patricia | Trustee Of The Darlene M. Murphy Trust 2011 | Nov 2014 (12y) | Less than 5% | |
| Johnson, Samuel, Sloan | Trustee Of The Michael David Miller Trust 2011 | Nov 2014 (12y) | Less than 5% | |
| Miller, Regis, C. | Trustee Of The Greg Miller Trust | Jun 2016 (10y) | Less than 5% | |
| Martino, Stephen, Domenic | Chief Financial Officer | Jan 2019 (8y) | Less than 5% | |
| Mitchell, C. Daniel | Chief Operating Officer | Apr 2019 (7y) | Less than 5% | |
| Darlene Marie Murphy | Owner/Shareholder | CFP | Oct 2019 (7y) | 10% – 25% |
| Michael David Miller | President And Ceo | Oct 2019 (7y) | Less than 5% | |
| William, Zorn | Trustee Of The Michael Miller Irrevocable Trust Of 2020 | Dec 2020 (6y) | Less than 5% | |
| Baillie, Dawn, Marie | Chief Compliance Officer | Sep 2021 (5y) | Less than 5% | |
| Joseph Michael Buscaino | Registered representative | Dec 2003 (23y) | ||
| James Alexander Wiegel | Registered representative | Jul 2010 (16y) | ||
| Gerald R Russo | Registered representative | Jun 2015 (11y) | ||
| Michael David Foley | Registered representative | Oct 2015 (11y) | ||
| Nicholas Anthony Felici | Registered representative | Dec 2016 (10y) | ||
| Stephen Anthony Marzo | Registered representative | Dec 2016 (10y) | ||
| Paul David Chamberlain | Registered representative | Dec 2017 (9y) | ||
| Thomas Francis La Haise | Registered representative | Feb 2020 (6y) | ||
| David Jacques Moret | Registered representative | Jan 2025 (2y) | ||
| James William Buckham | Registered representative | CFA | Jan 2025 (2y) | |
| Christopher John Carrelha | Registered representative | Jan 2025 (2y) | ||
| James Carl Miklas | Registered representative | Feb 2025 (1y) | ||
| Gabriel Joseph Osorio | Registered representative | May 2025 (1y) | ||
| Collin Michael Schrier | Registered representative | May 2025 (1y) | ||
| Rebecca Bahlert | Registered representative | Jun 2026 (0y) |
Entity owners (Schedule A/B)
| Entity | Title / status | Since | Sch. | Ownership |
|---|---|---|---|---|
| The Greg Miller Trust | Owner/Shareholder | Jun 2016 | A | 50% – 75% |
| The Darlene M. Murphy Trust 2011 | Owner / Shareholder | Nov 2014 | A | 10% – 25% |
| The Michael David Miller Trust 2011 | Owner / Shareholder | Nov 2014 | A | 10% – 25% |
| Michael Miller Irrevocable Trust Of 2020 | Owner / Shareholder | Dec 2020 | A | 5% – 10% |
Undisclosed: 0% – 15% of the firm is not attributable from the filed Schedule A bands.
Roster from the IAPD representatives feed; ownership and acquisition dates from Form ADV Schedule A/B. "Since" is the earliest filed registration or acquisition date.
Private funds (2, $137M gross assets)
| Fund | Type | Gross assets | Min. investment | Owners |
|---|---|---|---|---|
| Brenton Partners, L.P. | Hedge Fund | $103M | $0 | 82 |
| Brenton Partners Ii, L.P. | Hedge Fund | $34.8M | $0 | 26 |
From Form ADV Section 7.B private fund reporting.
Documents (1 archived)
| Form | Period | Size | |
|---|---|---|---|
| Form ADV (full filing) | 03/30/2026 | 1.44 MB | View · PDF · Source ↗ |
Archived copies of the firm's regulatory filings, versioned by content hash.
Disciplinary disclosures
Allegations: ON SEPTEMBER 25, 2023, WAM AND THE U.S. SECURITIES AND EXCHANGE COMMISSION ("SEC") AGREED TO A SETTLEMENT IN WHICH THE SEC ALLEGED THAT WAM VIOLATED SECTIONS 206(2) AND 206(4) OF THE INVESTMENT ADVISERS ACT OF 1940, AS AMENDED, AND RULES 206(4)-1 AND 206(4)-7 THEREUNDER. ACCORDING TO THE SEC'S ORDER, FROM FEBRUARY 2015 TO MARCH 2022, WAM'S WRITTEN DISCLOSURES FOR ADVERTISEMENTS CONCERNING AN INDEX THAT WAM CREATED TO DEPICT THE PERFORMANCE OF ITS CONVERTIBLE BOND INVESTMENT STRATEGY FROM JANUARY 2000 FORWARD FAILED TO ADEQUATELY DISCLOSE THE METHODOLOGIES THAT WAM USED TO CONSTRUCT THE INDEX. WAM, IN CONSULTATION WITH INTERNAL AND EXTERNAL COMPLIANCE AND LEGAL PROFESSIONALS, REVISED WAM INDEX DISCLOSURES BETWEEN 2018 AND 2022. IN MARCH 2022, WAM VOLUNTARILY DISCONTINUED USE OF THE WAM INDEX IN WAM'S ADVERTISEMENTS. WAM ALSO RETAINED OUTSIDE LEGAL AND COMPLIANCE PROFESSIONALS TO CONDUCT A REVIEW OF ITS MARKETING MATERIALS AND POLICIES AND PROCEDURES PERTAINING TO, AMONG OTHER AREAS, PERFORMANCE ADVERTISING INCLUDING THE USE OF HYPOTHETICAL PERFORMANCE. Status: Final Sanction Detail: WITHOUT ADMITTING OR DENYING THE FINDINGS, WAM CONSENTED TO A CEASE-AND-DESIST ORDER AND CENSURE, AND AGREED TO PAY A CIVIL PENALTY OF $1 MILLION. Summary: ON SEPTEMBER 25, 2023, WITHOUT ADMITTING OR DENYING THE FINDINGS, WAM CONSENTED TO A CEASE-AND-DESIST ORDER AND CENSURE, AND AGREED TO PAY A CIVIL PENALTY OF $1 MILLION.
Disclosure text reproduced verbatim from the firm's own Form ADV filings.
How they charge
- • Percentage of assets under management
- • Performance-based fees
Services
- • Portfolio management for individuals/small businesses
- • Portfolio management for investment companies
- • Portfolio management for pooled investment vehicles
- • Portfolio management for businesses/institutional clients
Custody
Reported custodians
- Charles Schwab & Co. $448M (23% of AUM) Mar 2026
- UBS $430M (22% of AUM) Mar 2026
- Fidelity Brokerage Services $291M (15% of AUM) Mar 2026
- Fidelity Investments $274M (13% of AUM) Jan 2026
- Wells Fargo $123M (6% of AUM) Mar 2026
Amounts as reported in ADV Item 5.K.(3) (custodians holding 10%+ of SMA assets).
Firm reports having custody of client funds or securities (Item 9.A).
Source
All data on this page comes from this firm's Form ADV filings, reproduced without modification. Latest filing: Mar 30, 2026.
View current Form ADV (SEC/IAPD) ↗