MASON STREET ADVISORS, LLC
โขCIK: 1167711โขFiling: Q4 2025
MASON STREET ADVISORS, LLC manages $1.0B across a concentrated portfolio of 15 holdings. The strategy exhibits a significant allocation to fixed income and broad market ETFs, notably anchoring positions in AGG at $310.4M and IVV at $144.4M. Further diversification is evident with substantial allocations to sector-specific and index funds, including SPTL ($105.8M) and SPMD ($91.9M). This structure suggests a core focus on systematic, low-volatility exposure across fixed income and equity benchmarks.
Total AUM
$1.0B
QoQ Performance
+5.3%
Positions
7
Top 10 Concentration
91.6%
Latest Filing
Q4 2025
Top Holdings Allocation
AGG
IVV
SPTL
SPMD
SPSM
IJR
AGG30.5%
IVV14.2%
SPTL10.4%
SPMD9.0%
SPSM6.0%
IJR5.6%
RSP4.9%
IJH3.9%
๐ Biggest Buys
๐ Biggest Sells
Sector Breakdown
Other85.8%
ETF14.2%
Changes from Q3 2025
NEW2 new positions
โ9 increased
โ4 decreased
Historical Filings
Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023