Mason Street Advisors, LLC Portfolio Holdings

Mason Street Advisors, LLC

  • $854 Million
  • Q2 2025

Mason Street Advisors, LLC has filed its 13F form on August 08, 2025 for Q2 2025 where it was disclosed a total value porftolio of $854 Million distributed in 15 stocks.

Among their holdings, we can observe that their the top five positions include companies like: Ishares Core U.S. Aggregate Bo with a value of $277M, Ishares Core S&P 500 ETF with a value of $168M, Spdr Portfolio Long Term Treas with a value of $103M, Spdr Portfolio with a value of $50.4M, and Ishares Tr with a value of $47.7M.

Examining the 13F form we can see an increase of $68.4M in the current position value, from $786M to 854M.

Mason Street Advisors, LLC is based out at Milwaukee, WI

Below you can find more details about Mason Street Advisors, LLC portfolio as well as his latest detailed transactions.

Portfolio value $854 Million
ETFs: $854 Million

Stock Holdings Table

Stock Market Cap. Holding Value (Reported) # of Shares. Last Trade Trade History
$0
$277 Million 32.42% of portfolio
2,792,394
Q2 2025 Added 9.72%
$0
$168 Million 19.62% of portfolio
269,950
Q2 2025 Reduced 7.41%
$0
$103 Million 12.05% of portfolio
3,874,900
Q2 2025 Added 4.92%
$0
$50.4 Million 5.9% of portfolio
927,600
Q1 2025 Added 14.31%
$0
$47.7 Million 5.59% of portfolio
571,900
Q2 2025 Reduced 36.44%
$0
$46.4 Million 5.43% of portfolio
1,088,800
Q2 2025 Added 27.57%
$0
$31.4 Million 3.68% of portfolio
1,486,000
Q4 2024 Reduced 4.47%
$0
$30.9 Million 3.62% of portfolio
320,500
Q4 2024 Reduced 5.04%
$0
$29.9 Million 3.5% of portfolio
692,700
Q2 2025 New
$0
$24.2 Million 2.83% of portfolio
133,100
Q1 2025 New
$0
$17.8 Million 2.08% of portfolio
414,700
Q2 2025 New
$0
$11 Million 1.28% of portfolio
216,650
Q2 2024 Reduced 56.08%
$0
$6.33 Million 0.74% of portfolio
304,900
Q4 2024 Reduced 70.39%
$0
$6.12 Million 0.72% of portfolio
98,600
Q2 2025 Reduced 41.59%
$0
$4.66 Million 0.54% of portfolio
42,600
Q2 2025 Reduced 17.44%

Summary

  • Portfolio
  • No. of Stocks 15
  • Current Value $854 Million
  • Prior Value $786 Million
  • Filing
  • Period Q2 2025
  • Filing Date August 08, 2025
  • Form Type 13F-HR
  • Activity in Q2 2025
  • New Purchases 2 stocks
  • Additional Purchases 3 stocks
  • Sold out of 0 stocks
  • Reduced holdings in 4 stocks
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