Managers / Q1 2026
MASON STREET ADVISORS, LLC
CIK 0001167711 · 720 EAST WISCONSIN AVE, MILWAUKEE, WI, 53202 · 4146655400
Reported Value
$1.0B
Q1 2026
Positions
15
Filings on Record
42
2019–present window
Filed
May 7, 2026
original filing
Summary
Mason Street Advisors, Llc reported $1.0B in U.S.-listed holdings across 15 positions for Q1 2026.
The portfolio is heavily concentrated: AGG alone accounts for 29.6% of reported value.
Compared with Q4 2025, the fund opened 2 new positions and exited 2.
Reported Value by Quarter
13F Reported Value
Portfolio Composition
By security type
Composition data arrives with ticker enrichment.
Quarter-over-Quarter Changes full breakdown →
Holdings — Q1 2026
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 | $402.1B | 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 | $114M | 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 24 additional managers.
- abrdn Investments Ltd028-14936
- ALLSPRING GLOBAL INVESTMENTS, LLC028-04413
- AMERICAN CENTURY INVESTMENT MANAGEMENT INC028-01091
- BLACKROCK ADVISORS LLC028-04295
- Boston Partners028-12484
- DODGE & COX028-00400
- DRIEHAUS CAPITAL MANAGEMENT LLC028-04207
- EARNEST PARTNERS LLC028-05269
- FEDERATED INVESTMENT MANAGEMENT CO028-04377
- FIAM LLC028-12282
- FRANKLIN MUTUAL ADVISERS LLC028-06154
- FRANKLIN RESOURCES INC028-00734
- Invesco Advisers, Inc.028-00255
- J.P. Morgan Investment Management Inc.028-11937
- KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC028-05792
- LOOMIS SAYLES & CO L P028-00398
- MASSACHUSETTS FINANCIAL SERVICES CO /MA/028-04968
- Neuberger Berman Investment Advisers LLC028-17085
- Northern Trust Investments, Inc028-10487
- PACIFIC INVESTMENT MANAGEMENT CO LLC028-10952
- T. Rowe Price Investment Management, Inc.028-22690
- Vaughan Nelson Investment Management, L.P.028-05840
- WELLINGTON MANAGEMENT GROUP LLP028-04557
- PRICE T ROWE ASSOCIATES INC /MD/028-00115
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 ↗.