StockDriftsStockDriftsTop 15 Mason Street Advisors LLC Holdings
| Stock | Company | % Port. | Shares | Value | Activity | Ownership | Avg. Cost | Date |
|---|---|---|---|---|---|---|---|---|
| AGG | ISHARES TR | 27.21% | 3.05M | $302.0M | +0.05%(+1.57K) | $98.01(-0.60%) | 2026-06-30 | |
| IVV | ISHARES TR | 13.93% | 206.5K | $154.6M | -2.45%(-5.20K) | $407.62(+90.71%) | 2026-06-30 | |
| SPTL | SPDR SERIES TRUST | 9.47% | 4.01M | $105.1M | +0.18%(+7.24K) | $27.52(-8.55%) | 2026-06-30 | |
| SPMD | SPDR SERIES TRUST | 8.64% | 1.42M | $95.9M | -9.15%(-142.90K) | $54.46(+25.35%) | 2026-06-30 | |
| SPSM | SPDR SERIES TRUST | 7.17% | 1.38M | $79.5M | +3.98%(+52.83K) | $43.53(+32.85%) | 2026-06-30 | |
| RSP | INVESCO EXCHANGE TRADED FD T | 5.53% | 288.6K | $61.4M | +7.78%(+20.82K) | $183.47(+20.35%) | 2026-06-30 | |
| IEFA | ISHARES TR | 5.52% | 634.8K | $61.3M | -10.72%(-76.24K) | $89.91(+12.38%) | 2026-06-30 | |
| RWR | SPDR SERIES TRUST | 4.61% | 453.3K | $51.2M | +29.99%(+104.58K) | $97.06(+15.69%) | 2026-06-30 | |
| SCHH | SCHWAB STRATEGIC TR | 4.61% | 2.16M | $51.2M | +31.28%(+514.99K) | $20.80(+13.85%) | 2026-06-30 | |
| AVLV | AMERICAN CENTY ETF TR | 3.9% | 474.8K | $43.3M | new | $85.01(+11.08%) | 2026-06-30 |
| Performance Metric | 3-Year Annualized | 3-Year Cumulative | 5-Year Annualized | 5-Year Cumulative |
|---|---|---|---|---|
| Top 20 Holdings Weighted | +10.54% | +35.06% | +5.40% | +30.10% |
| Top 20 Holdings Unweighted | +10.42% | +34.62% | +3.83% | +20.69% |
Mason Street Advisors LLC reports $1.11B in US-listed equity holdings across 15 positions in its most recent 13F filing. Its largest disclosed positions are AGG (27.2%), IVV (13.9%) and SPTL (9.5%). The top 20 holdings account for 100% of reported assets. Its disclosed equity book has returned +35.06% on a three-year cumulative basis. Figures reflect the Q2 2026 filing.
Portfolio changes
Every reported change this quarter, grouped by direction. The signal is in the rotation, not any single trade.
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Holdings on this page are parsed from Mason Street Advisors LLC’s Form 13F filings with the U.S. Securities and Exchange Commission (CIK 1167711). View Mason Street Advisors LLC’s 13F filings on SEC