Data / Investment advisers / Massachusetts / Santander Securities
Santander Securities, Boston, MA: $3.1 billion AUM, SEC registered investment adviser
Santander Securities is an SEC registered investment adviser with its main office in Boston, Massachusetts and reports $3.1 billion in regulatory assets under management in its Form ADV filed September 17, 2026. Its clients include individuals, corporations and other businesses and charitable organizations. It is paid through a percentage of assets under management.
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- Registration
- SEC registered investment adviser
- CRD number
- 41791
- SEC file number
- 801-56796
- SEC status
- Approved, effective September 2, 1999
- Legal name
- Santander Securities LLC
- Main office
- 75 State Street Mail Code: Ma-Sst-Inv3, Boston, MA 02109
- Phone
- (866) 736-6475
- Website
- santanderbank.com
- Regulatory AUM
- $3,140,983,898 in the Form ADV filed September 17, 2026
- Discretionary AUM
- $3,140,983,898
- Accounts
- 11,152
- Employees
- 449, of which 108 give investment advice
- Form of organization
- Limited Liability Company
- Paid through
- a percentage of assets under management
- Other offices
- 417
- Form ADV Item 11 disclosures
- Reported: criminal actions, SEC or CFTC regulatory actions, other federal, state or foreign regulatory actions, self-regulatory organization actions, other Item 11 matters, civil court actions
- Latest Form ADV filing
- September 17, 2026
- SEC record
- Investment Adviser Public Disclosure
Clients
Client types the adviser reports in Form ADV item 5.D, with the AUM it attributes to each.
| Client type | Clients | AUM |
|---|---|---|
| Individuals (other than high net worth individuals) | 10,832 | $2.85 billion |
| Corporations or other businesses | 41 | $42.4 million |
| Charitable organizations | 2 | $1 million |
AUM in the SEC's monthly files
Each change in the AUM the adviser reported across the monthly SEC files held here, with the first file that shows the new value.
| First in the file of | AUM | Form ADV filed |
|---|---|---|
| April 1, 2026 | $3.14 billion | March 25, 2026 |
| December 1, 2025 | $2.55 billion | November 5, 2025 |
Other advisers in Boston
| Adviser | City | AUM | Private funds | Source |
|---|---|---|---|---|
| Pathlight Capital | Boston | $3.52 billion | 8 | adviserinfo.sec.gov |
| Flagship Harbor Advisors, LLC | Boston | $3.42 billion | Not listed | adviserinfo.sec.gov |
| Invenomic Capital Management LP | Boston | $3.39 billion | 2 | adviserinfo.sec.gov |
| Northeast Investment Management Inc | Boston | $3.27 billion | Not listed | adviserinfo.sec.gov |
| Falcon Investment Advisors, LLC | Boston | $3.27 billion | 8 | adviserinfo.sec.gov |
| Winthrop Wealth | Boston | $3.10 billion | Not listed | adviserinfo.sec.gov |
| SVB Wealth | Boston | $3.10 billion | Not listed | adviserinfo.sec.gov |
| Ampersand Capital Partners | Boston | $3.09 billion | 4 | adviserinfo.sec.gov |
Also on SpecStream
- Investment advisers in Boston, MA
- Investment advisers in Massachusetts
- Advisers with $1 billion to $10 billion in AUM
- Advisers serving individuals
- Advisers serving corporations and other businesses
- Santander Securities on the SEC's adviser search
Updated November 7, 2026. Read from the SEC's Form ADV data files for investment advisers. Public data published by the US Securities and Exchange Commission (US government work). Advisers report these values themselves in Form ADV, and neither the SEC nor the states approve or guarantee them. AUM is regulatory assets under management as the adviser reported it in Form ADV item 5.F, which can differ from the AUM a firm quotes elsewhere. Exempt reporting advisers do not report AUM. Office address, phone and website are the adviser's main office as filed; a firm that files its main office as a private residence shows no street address or phone. An Item 11 disclosure is a reported event, not a finding about the firm today. Details for each firm are on the SEC's Investment Adviser Public Disclosure site. This page uses SEC data and is not endorsed or certified by the SEC. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.