Mason Street Advisors, LLC
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.
Latest 13F Filing Activity
Mason Street Advisors, LLC filed their most recent 13F report on Jun 30, 2025 disclosing 15 equity positions with a total 13F market value of $855M. The fund increased holdings in Ishares TR, Ishares TR, Dimensional Etf Trust among other positions. Mason Street Advisors, LLC reduced exposure to Ishares TR, Ishares TR, SPDR Series Trust among others.
Top Holdings
Equity Positions (15)
| Ticker | Security | Weight | Market Value | Shares | Avg Cost | Price | Change (QoQ) |
|---|---|---|---|---|---|---|---|
A AGG | ISHARES TR | 32.42% | $277.0M | 2,792,394 | $97.11 | $99.20 | +$25.2M |
I IVV | ISHARES TR | 19.62% | $167.6M | 269,950 | $383.70 | $620.90 | +$3.8M |
S SPTL | SPDR SERIES TRUST | 12.05% | $103.0M | 3,874,900 | $26.68 | $26.58 | +$2.3M |
S SPMD | SPDR SERIES TRUST | 5.90% | $50.4M | 927,600 | $53.94 | $54.38 | +$3.0M |
I IEFA | ISHARES TR | 5.59% | $47.7M | 571,900 | $64.98 | $83.48 | -$20.3M |