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Mason Street Advisors, LLC

CIK:0001167711
Asset Manager
$29B AUM
15 holdings
Milwaukee, WI, US
Founded:2001
14 employees
Latest filing:Jun 30, 2025

Mason Street Advisors, LLC is an SEC-registered investment adviser headquartered in Milwaukee, Wisconsin. With approximately 14 employees, the firm primarily manages assets for investment companies. Mason Street Advisors oversees significant assets and does not serve individual clients. The company is registered under CRD #114085 and SEC #801-60721 and focuses on institutional asset management.

Investment Strategy

Mason Street Advisors, LLC provides discretionary investment advisory services mainly to investment companies, employing a diversified portfolio approach focused on managing funds in fixed income and equity markets. The firm's philosophy emphasizes institutional best practices, risk management, and optimizing long-term returns for the benefit of its investment company clients. They utilize a combination of passive and active management strategies for portfolio construction.

Top Buys
I
IQLTISHARES TR
+$29.9M
A
AGGISHARES TR
+$25.2M
D
DFIVDIMENSIONAL ETF TRUST
+$17.8M
S
SPSMSPDR SERIES TRUST
+$11.6M
I
IVVISHARES TR
+$3.8M
Top Sells
I
IEFAISHARES TR
-$20.3M
I
IJHISHARES TR
-$3.7M
S
SPMDSPDR SERIES TRUST
+$3.0M
S
SPTLSPDR SERIES TRUST
+$2.3M
R
RSPINVESCO EXCHANGE TRADED FD T
+$1.1M

Top Holdings

A
AGGISHARES TR
+32.4%$277.0M
I
IVVISHARES TR
+19.6%$167.6M
S
SPTLSPDR SERIES TRUST
+12.1%$103.0M
S
SPMDSPDR SERIES TRUST
+5.9%$50.4M
I
IEFAISHARES TR
+5.6%$47.7M

Equity Positions (15)

TickerSecurityWeightMarket ValueSharesAvg CostPriceChange (QoQ)
A
AGG
ISHARES TR32.42%$277.0M2,792,394$97.11$99.20+$25.2M
I
IVV
ISHARES TR19.62%$167.6M269,950$383.70$620.90+$3.8M
S
SPTL
SPDR SERIES TRUST12.05%$103.0M3,874,900$26.68$26.58+$2.3M
S
SPMD
SPDR SERIES TRUST5.90%$50.4M927,600$53.94$54.38+$3.0M
I
IEFA
ISHARES TR5.59%$47.7M571,900$64.98$83.48-$20.3M

Industry Allocation