Asset manager · Boston, MA
MFS Institutional Advisors Inc.
SEC-registered investment adviser · CRD 107144 · SEC 801-46433
At a glance
MFS Institutional Advisors Inc. is an SEC-registered investment adviser based in Boston, Massachusetts, with $113.6 billion in regulatory assets under management as of its Form ADV filed March 31, 2026. Its largest client group by assets is pooled investment vehicles, and it reports 9,552 individual clients. By Form ADV it is a asset manager, ranked 125th of 3,218 asset managers and 236th of 17,210 SEC-registered advisers by assets.
Main office 617-954-5000mfs.comLinkedInAs filed on Form ADV
- Regulatory AUM
- $114B
- Rank among asset managers
- #125 of 3,218
- Rank among all SEC RIAs
- #236 of 17,210
- Rank in Massachusetts
- #24 of 627
- Individual clients
- 9,552
- High-net-worth clients
- 407
- Accounts
- 13,555
- Discretionary
- 100% of AUM
- Employees
- 1,311
- Advisory staff
- 327
- Offices
- 1
Owners and executives on its Form ADV
- Heidi W. HardinDirector, Chair of the Board and Secretary
- Rosa E. Licea-MaillouxChief Compliance Officer
- Joseph J. SmelstorTreasurer
- Richard A. DrageDirector
- Aditi V. TaylorDirector
- Deborah L. DoddsDirector
- Christine E. ModoonoDirector
- Sean M. KenneyPresident
Custody and brokerage
Broker-dealer
Hybrid RIA
MFS Institutional Advisors Inc. is a hybrid RIA: 130 of its employees are also registered representatives of a broker-dealer. It names affiliated broker-dealers: MFS Fund Distributors, Inc., MFS International (hong Kong) Limited, MFS International (u.k.) Limited, MFS International Australia PTY LTD, MFS International Singapore PTE. LTD., MFS Investment Management Canada Limited, MFS Investment Management Company (lux) S.a R.L., MFS Investment Management K.K. and Slgi Asset Management Inc..
- MFS Fund Distributors, Inc. ↗CRD 31052
- MFS International (hong Kong) Limited
- MFS International (u.k.) Limited
- MFS International Australia PTY LTD
- MFS International Singapore PTE. LTD.
- MFS Investment Management Canada Limited
- MFS Investment Management Company (lux) S.a R.L.
- MFS Investment Management K.K.
- Slgi Asset Management Inc.
Its Form ADV brochure (filed March 2026) names MFS Fund Distributors as the broker-dealer its advisers are registered with.
Certain registered representatives of MFD are also supervised persons of MFSI and promote the sale of investment strategies that are offered via a variety of investment vehicles such as the MFS Funds, the MFS Private Funds, the MHTC CITs ,
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Pooled investment vehicles | 124 | $46B | 40% |
| State or municipal government entities | 51 | $20B | 17% |
| Pension and profit sharing plans | 253 | $17B | 15% |
| Sovereign wealth funds and foreign official institutions | 12 | $15B | 13% |
| Insurance companies | 37 | $7.8B | 7% |
| Other | 3,294 | $2.2B | 2% |
| Individuals | 9,145 | $2.2B | 2% |
| Charitable organizations | 116 | $1.9B | 2% |
| High-net-worth individuals | 407 | $1.0B | <1% |
| Investment companies | 2 | $749M | <1% |
| Corporations or other businesses | 114 | $606M | <1% |
Private funds
MFS Institutional Advisors Inc. reports 6 private funds with $1.7B in gross assets: hedge funds, other private funds (Form ADV Item 7.B).
Disciplinary disclosures
MFS Institutional Advisors Inc. answers yes to 4 disclosure items in Item 11 of Form ADV (criminal, regulatory or civil matters involving the firm or its advisory affiliates). Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for individuals and small businesses
- Portfolio management for investment companies
- Portfolio management for pooled investment vehicles
- Portfolio management for businesses and institutions
- Pension consulting
- Selecting other advisers
How it’s paid
- A percentage of assets under management
- Performance-based fees
- Other
Form ADV and brochures on the SEC’s adviser search ↗mfs.com ↗
AtlasMembers
The full record on MFS Institutional Advisors Inc.
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, ten years of filings
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- Growth over one, three and five years
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- Rank against 202 peers of its type and size
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- Owners and executives, with titles and stakes
- 8 namedLocked
- Main office, fax and compliance officer
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- Filing changes this year, with alerts
- 4Locked
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Background
Questions
How much does MFS Institutional Advisors Inc. manage?
MFS Institutional Advisors Inc. reports $113.6 billion in regulatory assets under management across 13,555 accounts, 100% of it on a discretionary basis, on its Form ADV filed March 31, 2026.
What kind of firm is MFS Institutional Advisors Inc.?
MFS Institutional Advisors Inc. is a asset manager by its Form ADV answers. Most of its assets are managed for funds, institutions or other businesses rather than individuals. A public reporting company controls it.
Who are MFS Institutional Advisors Inc.’s clients?
By assets, its largest client types are pooled investment vehicles ($46.0 billion, 124 clients); state or municipal government entities ($19.7 billion, 51 clients); pension and profit sharing plans ($17.0 billion, 253 clients).
Does MFS Institutional Advisors Inc. manage private funds?
Yes. It reports 6 private funds with $1.7 billion in gross assets, including hedge funds, other private funds.
Does MFS Institutional Advisors Inc. have any disciplinary history?
MFS Institutional Advisors Inc. answers yes to 4 disclosure items in Item 11 of Form ADV, which covers criminal, regulatory and civil matters involving the firm or its advisory affiliates. The details are on the SEC’s adviser search.
Where these numbers come from
Every figure is MFS Institutional Advisors Inc.’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-31), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →