Elisabeth Kostin
Investment Adviser Representative at MML Investors Services, LLC
Professional summary
Compiled by AdvisorFinder from public regulatory records. This advisor has not provided a personal biography.
Elisabeth Kostin is an investment adviser representative with MML Investors Services, LLC in Boston, MA, where they have been registered since 2023, the year they entered the securities industry. They have passed 3 industry qualification exams, including the Series 66 (combined investment adviser and state securities agent) and Series 7 (general securities representative). They are registered to provide investment advice in Connecticut.
Office
Advisors at this office: 47
Branch office as filed with FINRA, counting current advisors in the directory who work there.
Registrations & licenses
- Investment adviser:
- Connecticut
- Broker:
10 states and territories
Arizona, California, Connecticut, Maine, Massachusetts, Minnesota, New Jersey, New York, North Carolina, Virginia
Registration requirements vary by state and service. Contact the advisor's firm to confirm whether they can serve you.
Financial-firm registration history
Registration history as reported to FINRA, most recent first.
Reported employment history
Employment the advisor reported on their SEC/FINRA filings, as of October 8, 2026. It may not be a complete history.
- MML Investors Services, LLCSep 2023 – no end date reportedBoston, MA
- MassMutual Life Insurance CoSep 2023 – no end date reportedBoston, MA
- Jewish Family Services of Greater HartfordNov 2020 – Dec 2023West Hartford, CT
- Jewish Community Council of Greater Coney IslandOct 2020 – Jun 2021Brooklyn, NY
- UJA-Federation of New YorkJul 2010 – Jun 2020New York, NY
- UnemployedJun 2020 – Oct 2020West Hartford, CT
Official records & sources
Data as of August 10, 2026 · Source: SEC IAPD & FINRA BrokerCheck
About MML Investors Services, LLC
These details describe the firm overall. Individual advisors' services, clients, and fees may differ.
Fee arrangements the firm reports
- Percentage of assets under management
- Hourly
- Fixed fee
- Other
- Estimated blended rate
- 0.01
Arrangements the firm reports on its Form ADV; this advisor may not charge every fee listed. Estimated from the firm's Form ADV — individual terms may differ. Not a quote.
Services the firm offers
Client types the firm serves
Firm assets under management
$25B+
- Firm disclosures (Form ADV)
- Disciplinary history reportedVerify on SEC IAPD
- Advisors listed on AdvisorFinder:
- 5,037
- Offices listed on AdvisorFinder:
- 26
- Main office:
- Springfield, MA
- SEC file number:
- 801-44264
Counts reflect AdvisorFinder directory coverage, not necessarily the firm's complete network.
Form ADV data as of September 3, 2026
View full firm profileOther advisors at MML Investors Services, LLC
Showing 12 of 5,037 in the directory
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This profile was compiled and published by AdvisorFinder as editorial content using publicly available information from the SEC's IAPD database and FINRA BrokerCheck. Elisabeth Kostin has not reviewed, approved, or endorsed this profile and is not responsible for its accuracy. Regulatory records change over time — always verify the current record directly on BrokerCheck or SEC.gov before making any decision. AdvisorFinder may be compensated for referrals generated through this page.
BrokerCheck data is used subject to the FINRA BrokerCheck Terms of Use. Found something inaccurate? Report inaccurate data and we will correct any error we introduced. Errors in the underlying BrokerCheck record itself are referred to FINRA, which maintains that record.
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