Managers / Q4 2021 · view latest →
MASON STREET ADVISORS, LLC
CIK 0001167711 · 720 EAST WISCONSIN AVE, MILWAUKEE, WI, 53202 · 4146655400
Summary
Mason Street Advisors, LLC reported $138M in U.S.-listed holdings across 9 positions for Q4 2021.
Its largest position, Pimco Etf Tr, represents 18.1% of the portfolio.
The book was largely unchanged from Q3 2021.
Portfolio Metrics
Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.
Reported Value by Quarter
Portfolio Composition
- ETP · 100.0% · $138M
Quarter-over-Quarter Changes full breakdown →
vs Q3 2021 (amended baseline)
| Issuer | Move | Share Δ | Shares now | Value Δ | Value now |
|---|---|---|---|---|---|
| ISHARES TR | ADDED | +3.5K | 31.3K | +$2M | $9M |
| ISHARES INC | TRIMMED | −17.8K | 148.5K | −$1M | $9M |
| ISHARES TR | TRIMMED | −7.2K | 64.7K | −$1M | $14M |
| ISHARES TR | ADDED | +14.6K | 162.0K | +$1M | $13M |
| ISHARES TR | ADDED | +14.6K | 191.0K | +$2M | $22M |
| ISHARES TR | ADDED | +8.2K | 114.7K | +$662,000 | $10M |
| ISHARES TR | HELD | +900 | 23.3K | +$1M | $11M |
| J P MORGAN EXCHANGE-TRADED F | HELD | +0 | 493.3K | −$119,000 | $25M |
Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.
Holdings — Q4 2021
| # | Issuer | Class | % Portfolio | Value ↓ | Shares |
|---|---|---|---|---|---|
| 1 | ISHARES TR | CORE US AGGBD ET · RUSSELL 2000 ETF · MSCI EAFE ETF · CORE S&P500 ETF · IBOXX HI YD ETF · CORE S&P MCP ETF | 57.33% | $79M | 587.0K |
| 2 | PIMCO ETF TR | ENHAN SHRT MA AC | 18.12% | $25M | 245.5K |
| 3 | J P MORGAN EXCHANGE-TRADED F | ULTRA SHRT INC | 18.09% | $25M | 493.3K |
| 4 | ISHARES INC | CORE MSCI EMKT | 6.46% | $9M | 148.5K |
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q1 2026 | $1.0B | 15 | May 7, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q4 2025 | $1.0B | 15 | Feb 4, 2026 | 13F-HR | changes · EDGAR ↗ |
| Q3 2025 | $965M | 15 | Oct 31, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q2 2025 | $855M | 15 | Aug 8, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q1 2025 | $786M | 13 | May 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q4 2024 | $773M | 12 | Feb 10, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $823M | 12 | Nov 12, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $743M | 12 | Aug 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $594M | 8 | May 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $545M | 7 | Feb 13, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $521M | 8 | Nov 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $537M | 8 | Aug 14, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $452M | 9 | May 15, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $402M | 9 | Feb 21, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $345M | 9 | Nov 14, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $286M | 10 | Aug 15, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $170M | 11 | May 9, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $138M | 9 | Feb 3, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $134M | 9 | Nov 15, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $111M | 8 | Aug 13, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | Under review | 7 | May 14, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $5.9B | 1,515 | Feb 12, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | $5.1B | 1,516 | Nov 13, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | $4.9B | 1,516 | Aug 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $4.3B | 1,535 | May 8, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $5.1B | 1,516 | Feb 19, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q3 2019 | $4.8B | 1,516 | Nov 5, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $4.7B | 1,513 | Aug 12, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q1 2019 | $4.8B | 1,560 | May 7, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $4.0B | 1,514 | Feb 13, 2019 | 13F-HR | changes · EDGAR ↗ |
Other Included Managers
This filing reports holdings on behalf of 16 additional managers.
- ABERDEEN ASSET MANAGEMENT PLC/UK028-04701
- AMERICAN CENTURY INVESTMENT MANAGEMENT INC028-01091
- BLACKROCK ADVISORS LLC028-04295
- FEDERATED INVESTMENT MANAGEMENT CO028-04377
- FIAM LLC028-12282
- FIDUCIARY MANAGEMENT INC /WI/028-01526
- LOOMIS SAYLES & CO L P028-00398
- MACQUARIE INVESTMENT MANAGEMENT BUSINESS TRUST028-05267
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/028-04968
- PACIFIC INVESTMENT MANAGEMENT CO LLC028-10952
- PRICE T ROWE ASSOCIATES INC /MD/028-00115
- DODGE & COX028-00400
- WELLINGTON MANAGEMENT GROUP LLP028-04557
- ALLSPRING GLOBAL INVESTMENTS, LLC028-04413
- Northern Trust Investments, Inc028-10487
- NORTHWESTERN MUTUAL LIFE INSURANCE CO028-00229
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.