Clients
Mason Street Advisors serves 2 clients. The average client has about $19.5 billion with the firm.
- Investment companies2 clients100%
Show client breakdownHide client breakdown
| Client type | Clients | Regulatory AUM | Share | Avg. per client |
|---|---|---|---|---|
| Investment companies | 2 | $39,079,170,300 | 100.0% | $19.54B |
| Total | 2 | $39,079,170,300 | 100% | $19.54B |
- Clients
- 2
- Regulatory AUM
- $39,079,170,300
- Share
- 100.0%
- Avg. per client
- $19.54B
Total
- Clients
- 2
- Regulatory AUM
- $39,079,170,300
- Share
- 100%
- Avg. per client
- $19.54B
What it does
Mason Street Advisors provides portfolio management for investment companies and selecting other managers. It is paid through a percentage of assets and other arrangements.
Mason Street Advisors advises no private funds.
100.0% of assets ($39.08B across 34 accounts) are managed with discretion. 0% of clients are outside the U.S., and 0 clients received advice without assets under management last fiscal year.
Custodians
Mason Street Advisors does not have custody of client assets.
- All other custodians$39.08B100%
Ownership and leadership
The Northwestern Mutual Life Insurance Company owns 75% or more of Mason Street Advisors.
- Owns 75% or more of Mason Street Advisors, LLC
The Northwestern Mutual Life Insurance Company
Control person · since May 2001
Leadership
- Paul MikelsonPresident & Director
- Matthew GabrysChief Compliance Officer
- Andrew HeistadTreasurer
- Lynn LeritzDirector
- Brent SchutteChief Investment Officer & Director
- Bonnie TomczakChair & Director of the Board
Staff
- 13 employees
- 13 in advisory functions
Reported holdings
Mason Street Advisors’ reported 13F holdings total $1.11B across 15 positions, and the ten largest make up 90.6% of it.
- $1.11B
- Reported 13F value
- 15
- Positions
- 90.6%
- In the 10 largest
- +8.5%
- Value vs. prior quarter
- iShares TR · Core US Aggbd ET27.2%
- iShares TR · Core S&P500 ETF13.9%
- SPDR Series Trust · ST Lon Treas ETF9.5%
- SPDR Series Trust · ST Str P400mid8.6%
- SPDR Series Trust · ST Str Sp600 Sml7.2%
- Invesco Exchange Traded FD T · S&P500 Eql Wgt5.5%
- iShares TR · Core MSCI Eafe5.5%
- SPDR Series Trust · ST Str Dow REIT4.6%
- Schwab Strategic TR · US REIT ETF4.6%
- American Centy ETF TR · US Large Cap Vlu3.9%
Together, the ten largest are 90.6% of reported value.
A 13F covers only exchange-traded long positions the firm holds with discretion, so this $1.11B is not its $39.08B in regulatory assets and does not represent any individual client's portfolio.
Fees
Mason Street Advisors is paid through a percentage of assets under management and other.
Mason Street Advisors’ fee rates are not included in this profile. Find its brochure on the SEC’s site.
Offices and registrations
Besides its headquarters, Mason Street Advisors has 0 offices, with 1 listed address in 1 state.
Wisconsin · 1 listed address
- 720 East Wisconsin Avenue, MilwaukeeHQ
Registration details
- Legal name
- Mason Street Advisors, LLC
- Headquarters
- 720 East Wisconsin Avenue, Milwaukee, WI 53202-4797
- Phone
- 414-665-5400
- Website
- Not reported
- SEC file
- 801-60721
- Structure
- Delaware LLC
- Fiscal year end
- December
This directory does not report disciplinary history, for any firm or individual, in either direction. The SEC publishes the complete record, including any disciplinary events, and it is the authoritative place to check one. See this firm's record on adviserinfo.sec.gov
Common questions
How many clients does Mason Street Advisors have?
Mason Street Advisors has 2 clients and manages $39.1 billion for them, as of March 2026.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 31 March 2026
What services does Mason Street Advisors offer?
Mason Street Advisors provides portfolio management for investment companies and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
How many financial advisors does Mason Street Advisors have?
Mason Street Advisors has 0 investment adviser representatives registered with state securities authorities, out of 13 employees, and 13 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
Who owns Mason Street Advisors?
Mason Street Advisors’ direct owner is the Northwestern Mutual Life Insurance Company (75% or more).
Source: Form ADV Part 1A, Schedules A and B, filed 31 March 2026
How does Mason Street Advisors get paid?
Mason Street Advisors is paid through a percentage of assets under management and other arrangements. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file