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MASON STREET ADVISORS, LLC

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13F filer, CIK 1167711, MILWAUKEE, WI

MASON STREET ADVISORS, LLC reported $964,773,639 across 15 holdings for the quarter ended 2025-09-30, in a 13F-HR filed 2025-10-31. Its ten largest share positions make up 91.5% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001167711-25-000006

Period
2025-09-30
Reported value
$965M
Holdings
15
Top 10 weight
91.5%
New
2
Sold out
2

Largest buys vs the previous quarter

SecurityShares changeApprox. value
VLUEnew+320,000$40M
SPMDadded+434,600$24.9M
AGGadded+246,936$24.8M
JPSTadded+251,920$12.8M
IEFAadded+59,855$5.23M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Largest sells vs the previous quarter

SecurityShares changeApprox. value
IVVreduced-60,280-$40.3M
IJHexited-98,600-$6.12M
IJRexited-42,600-$4.66M

Ranked by the share change valued at this quarter's implied price (value over shares in the 13F). A position sold out is valued at the previous quarter's price, its last report.

Holdings, Q3 2025

Share positions as resolved from 13F-HR 0001167711-25-000006, largest first. % of portfolio is the value over $964,773,639, the sum of the share positions whose value is usable for ratios (method).

SecurityHistorySharesValue% of portfolioChangeLatest eventTimeline
AGGISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 2,521,600 shares; 2024Q4: 2,575,800 shares; 2025Q1: 2,545,100 shares; 2025Q2: 2,792,394 shares; 2025Q3: 3,039,330 shares 3,039,330$305M31.58%+246,936Timeline
IVVISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 303,250 shares; 2024Q4: 287,750 shares; 2025Q1: 291,550 shares; 2025Q2: 269,950 shares; 2025Q3: 209,670 shares 209,670$140M14.55%-60,280Timeline
SPTLSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 3,700,000 shares; 2024Q4: 3,700,000 shares; 2025Q1: 3,693,100 shares; 2025Q2: 3,874,900 shares; 2025Q3: 3,962,640 shares 3,962,640$107M11.07%+87,740Timeline
SPMDSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 720,900 shares; 2024Q4: 811,500 shares; 2025Q1: 927,600 shares; 2025Q2: 927,600 shares; 2025Q3: 1,362,200 shares 1,362,200$77.9M8.07%+434,600Timeline
IEFAISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 920,400 shares; 2024Q4: 1,033,700 shares; 2025Q1: 899,800 shares; 2025Q2: 571,900 shares; 2025Q3: 631,755 shares 631,755$55.2M5.72%+59,855Timeline
SPSMSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 740,700 shares; 2024Q4: 853,500 shares; 2025Q1: 853,500 shares; 2025Q2: 1,088,800 shares; 2025Q3: 1,163,700 shares 1,163,700$53.9M5.59%+74,900Timeline
VLUEISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 320,000 shares 320,000$40M4.15%newTimeline
RWRSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 337,500 shares; 2024Q4: 320,500 shares; 2025Q1: 320,500 shares; 2025Q2: 320,500 shares; 2025Q3: 355,805 shares 355,805$35.7M3.7%+35,305Timeline
SCHHSCHWAB STRATEGIC TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,555,500 shares; 2024Q4: 1,486,000 shares; 2025Q1: 1,486,000 shares; 2025Q2: 1,486,000 shares; 2025Q3: 1,627,170 shares 1,627,170$35.1M3.64%+141,170Timeline
IQLTISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 692,700 shares; 2025Q3: 751,440 shares 751,440$33.2M3.44%+58,740Timeline
RSPINVESCO EXCHANGE TRADED FD TQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 133,100 shares; 2025Q2: 133,100 shares; 2025Q3: 152,610 shares 152,610$29M3%+19,510Timeline
JPSTJ P MORGAN EXCHANGE TRADED FQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 216,650 shares; 2024Q4: 216,650 shares; 2025Q1: 216,650 shares; 2025Q2: 216,650 shares; 2025Q3: 468,570 shares 468,570$23.8M2.46%+251,920Timeline
DFIVDIMENSIONAL ETF TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 414,700 shares; 2025Q3: 443,115 shares 443,115$20.4M2.12%+28,415Timeline
BCIABRDN ETFSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: 1,029,600 shares; 2024Q4: 304,900 shares; 2025Q1: 304,900 shares; 2025Q2: 304,900 shares; 2025Q3: 399,645 shares 399,645$8.61M0.89%+94,745Timeline
IEMGISHARES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2023Q4: restricted; 2024Q1: restricted; 2024Q2: restricted; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 3,350 shares 3,350$221K0.02%newTimeline

Sold out in Q3 2025

Positions in the previous quarter's report that this quarter's report no longer lists.

SecurityShares beforeValue beforeType
IJHISHARES TR98,600$6.12Mshares
IJRISHARES TR42,600$4.66Mshares

How Q3 2025 was built

Available 13F filings of this filer for the quarter and their roles: the base report is the latest original or restatement, NEW HOLDINGS amendments filed after it are added (method).

FilingRoleAmendmentFiledAcceptedIngested
13F-HR 0001167711-25-000006 base2025-10-31acceptance time not in the bulk data set