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MASON STREET ADVISORS, LLC

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13F filer, CIK 1167711, MILWAUKEE, WI

MASON STREET ADVISORS, LLC reported $1,109,891,435 across 15 holdings for the quarter ended 2026-06-30, in a 13F-HR filed 2026-08-12. Its ten largest share positions make up 90.59% of the portfolio.

Filed (acceptance time not in the bulk data set), ingested 13F-HR 0001167711-26-000005

Period
2026-06-30
Reported value
$1.11B
Holdings
15
Top 10 weight
90.59%
New
1
Sold out
1

Largest buys vs the previous quarter

SecurityShares changeApprox. value
AVLVnew+474,820$43.3M
SCHHadded+514,990$12.2M
RWRadded+104,580$11.8M
RSPadded+20,825$4.43M
BCIadded+184,160$4.11M

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
VLUEexited-288,200-$41M
SPMDreduced-142,897-$9.65M
IEFAreduced-76,244-$7.36M
IVVreduced-5,196-$3.89M

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, Q2 2026

Share positions as resolved from 13F-HR 0001167711-26-000005, largest first. % of portfolio is the value over $1,109,891,435, 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; 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; 2025Q4: 3,107,230 shares; 2026Q1: 3,049,263 shares; 2026Q2: 3,050,830 shares 3,050,830$302M27.21%+1,567Timeline
IVVISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 303,250 shares; 2024Q4: 287,750 shares; 2025Q1: 291,550 shares; 2025Q2: 269,950 shares; 2025Q3: 209,670 shares; 2025Q4: 210,793 shares; 2026Q1: 211,681 shares; 2026Q2: 206,485 shares 206,485$155M13.93%-5,196Timeline
SPTLSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2025Q4: 3,997,680 shares; 2026Q1: 3,998,720 shares; 2026Q2: 4,005,960 shares 4,005,960$105M9.47%+7,240Timeline
SPMDSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 720,900 shares; 2024Q4: 811,500 shares; 2025Q1: 927,600 shares; 2025Q2: 927,600 shares; 2025Q3: 1,362,200 shares; 2025Q4: 1,587,390 shares; 2026Q1: 1,561,969 shares; 2026Q2: 1,419,072 shares 1,419,072$95.9M8.64%-142,897Timeline
SPSMSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 740,700 shares; 2024Q4: 853,500 shares; 2025Q1: 853,500 shares; 2025Q2: 1,088,800 shares; 2025Q3: 1,163,700 shares; 2025Q4: 1,293,880 shares; 2026Q1: 1,326,423 shares; 2026Q2: 1,379,248 shares 1,379,248$79.5M7.17%+52,825Timeline
RSPINVESCO EXCHANGE TRADED FD TQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: 133,100 shares; 2025Q2: 133,100 shares; 2025Q3: 152,610 shares; 2025Q4: 259,430 shares; 2026Q1: 267,820 shares; 2026Q2: 288,645 shares 288,645$61.4M5.53%+20,825Timeline
IEFAISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 920,400 shares; 2024Q4: 1,033,700 shares; 2025Q1: 899,800 shares; 2025Q2: 571,900 shares; 2025Q3: 631,755 shares; 2025Q4: 5,700 shares; 2026Q1: 710,997 shares; 2026Q2: 634,753 shares 634,753$61.3M5.52%-76,244Timeline
RWRSPDR SERIES TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 337,500 shares; 2024Q4: 320,500 shares; 2025Q1: 320,500 shares; 2025Q2: 320,500 shares; 2025Q3: 355,805 shares; 2025Q4: 366,555 shares; 2026Q1: 348,675 shares; 2026Q2: 453,255 shares 453,255$51.2M4.61%+104,580Timeline
SCHHSCHWAB STRATEGIC TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 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; 2025Q4: 1,713,085 shares; 2026Q1: 1,646,125 shares; 2026Q2: 2,161,115 shares 2,161,115$51.2M4.61%+514,990Timeline
AVLVAMERICAN CENTY ETF TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: not reported; 2025Q4: not reported; 2026Q1: not reported; 2026Q2: 474,820 shares 474,820$43.3M3.9%newTimeline
IQLTISHARES TRQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 692,700 shares; 2025Q3: 751,440 shares; 2025Q4: 748,240 shares; 2026Q1: 768,930 shares; 2026Q2: 792,666 shares 792,666$39.3M3.54%+23,736Timeline
JPSTJ P MORGAN EXCHANGE TRADED FQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 216,650 shares; 2024Q4: 216,650 shares; 2025Q1: 216,650 shares; 2025Q2: 216,650 shares; 2025Q3: 468,570 shares; 2025Q4: 480,735 shares; 2026Q1: 486,336 shares; 2026Q2: 494,716 shares 494,716$25M2.25%+8,380Timeline
DFIVDIMENSIONAL ETF TRUSTQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: 414,700 shares; 2025Q3: 443,115 shares; 2025Q4: 393,365 shares; 2026Q1: 403,315 shares; 2026Q2: 414,285 shares 414,285$22.4M2.02%+10,970Timeline
BCIABRDN ETFSQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: 1,029,600 shares; 2024Q4: 304,900 shares; 2025Q1: 304,900 shares; 2025Q2: 304,900 shares; 2025Q3: 399,645 shares; 2025Q4: 337,715 shares; 2026Q1: 356,335 shares; 2026Q2: 540,495 shares 540,495$12.1M1.09%+184,160Timeline
IEMGISHARES INCQuarterly shares; oldest to newest; scale is this security's eight-quarter maximum; 2024Q3: not reported; 2024Q4: not reported; 2025Q1: not reported; 2025Q2: not reported; 2025Q3: 3,350 shares; 2025Q4: not reported; 2026Q1: 43,520 shares; 2026Q2: 68,080 shares 68,080$5.64M0.51%+24,560Timeline

Sold out in Q2 2026

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

SecurityShares beforeValue beforeType
VLUEISHARES TR288,200$41Mshares

How Q2 2026 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 0001167711-26-000005 base2026-08-12acceptance time not in the bulk data set