Mason Street Advisors, LLC
MASON STREET ADVISORS, LLC
Mason Street Advisors, LLC is an investment management firm based out of Milwaukee, Wisconsin. The company was established in 2001 and is currently headed by President and Director Jefferson V. DeAngelis. Mason Street Advisors operates as a wholly owned subsidiary of the Northwestern Mutual Life Insurance Company and has expanded from its inception to currently operate with 12 employees of which 10 are investment professionals. The company conducts its research both internally and externally, utilizing a fundamental and technical methodology to make its investment decisions. Mason Street Advisors invests in the growth stocks of companies, allocating its assets across the public equity and fixed income markets on a global scale. The company invests most heavily in the finance sector, which alone makes up approximately a fifth of its total asset allocations, and also invests in the information technology, health care, consumer discretionary, industrials, consumer staples, energy, and utilities and telecommunications sectors, among others to a lesser degree, in order of decreasing allocation. Mason Street Advisors’s top holdings include Apple Inc., Microsoft Corp., Exxon Mobil Corp., Johnson & Johnson Co., and General Electric Co with none of its holdings except for Apple Inc. exceeding 1.5% of its total holdings. The company’s top 10 holdings together make up approximately 12.6% of its total and the company has a turnover rate of 3%. Mason Street Advisors holds over $20.5 billion in total assets under management spread across 30 accounts, all of which are discretionary accounts. The company’s clients are composed of investment companies, charities, corporations and other businesses, and investment advisors with the highest amount of managed assets coming from investment companies, which alone makes up over three quarters of its total managed assets. Mason Street Advisors takes advisory fees in the form of a percentage of assets, various performance based fees, and other fees that includes actualized costs.
Holdings MV
6.16B
Last Updated
2026-03-02
Total Holdings
20
Tracker Performance
Mason Street Advisors, LLC
0%
S&P 500
0%
Total Return
+9.65%
Annualized Return
+14.45%
1 Day Change
+0.12%
Sharpe Ratio
0.67
Trade Updates
2026-03-02
Ticker
Name
03/02
Sell
11.18%
Fill Price --
10.57%
Ticker
Name
03/02
Buy
8.10%
Fill Price --
8.40%
Ticker
Name
03/02
Buy
4.18%
Fill Price --
4.66%
Ticker
Name
03/02
Sell
1.82%
Fill Price --
1.67%
Ticker
Name
03/02
Buy
0.00%
Fill Price --
1.42%
Ticker
Name
03/02
Sell
2.08%
Fill Price --
1.98%
Ticker
Name
03/02
Sell
1.56%
Fill Price --
1.47%
Ticker
Name
03/02
Sell
12.58%
Fill Price --
12.29%
Ticker
Name
03/02
Sell
1.47%
Fill Price --
0.00%
Ticker
Name
03/02
Sell
2.38%
Fill Price --
2.37%
Ticker
Name
03/02
Sell
2.65%
Fill Price --
2.61%
Ticker
Name
03/02
Sell
1.80%
Fill Price --
1.76%
Ticker
Name
03/02
Buy
6.00%
Fill Price --
6.13%
Ticker
Name
03/02
Buy
9.69%
Fill Price --
11.56%
Ticker
Name
03/02
Buy
2.55%
Fill Price --
2.66%
Ticker
Name
03/02
Sell
16.16%
Fill Price --
16.15%
Ticker
Name
03/02
Buy
1.60%
Fill Price --
2.17%
Ticker
Name
03/02
Buy
5.26%
Fill Price --
5.55%
Ticker
Name
03/02
Sell
3.38%
Fill Price --
3.31%
Ticker
Name
03/02
Sell
1.90%
Fill Price --
1.59%
Ticker
Name
03/02
Sell
2.13%
Fill Price --
1.67%
Current Holdings
Mason Street Advisors, LLC maintains a prominent position in the Computer sector (24.31%), which serves as the cornerstone of the portfolio. The remaining capital is allocated across Internet & Media and other industries, balancing sector-specific growth potential with risk management.
Computer
24.31%
Internet & Media
21.01%
Electronics
20.73%
Commerce
10.28%
Banks
9.55%
Non-Bank Financials
7.05%
Auto
5.56%
Medical Biology
2.56%
Defense
1.64%
Mining
1.61%
Symbol
P&L %
Position Size
Ticker
Name
+94.23%
12.09%
Ticker
Name
+58.93%
1.61%
Ticker
Name
+44.32%
5.56%
Ticker
Name
+27.37%
10.42%
Ticker
Name
+23.96%
4.62%
Ticker
Name
+17.46%
2.56%
Ticker
Name
+17.25%
16.11%
Ticker
Name
+9.61%
1.59%
Ticker
Name
+5.93%
1.64%
Ticker
Name
+3.94%
2.00%
Ticker
Name
+2.05%
1.43%
Ticker
Name
-0.66%
2.37%
Ticker
Name
-1.54%
1.46%
Ticker
Name
-3.18%
8.69%
Ticker
Name
-6.28%
1.76%
Ticker
Name
-9.55%
3.29%
Ticker
Name
-9.95%
6.23%
Ticker
Name
-14.58%
11.69%
Ticker
Name
-19.00%
2.20%
Ticker
Name
-92.11%
2.69%
Disclaimer
This simulated portfolio Tracker is based on holdings disclosed in institutional 13F filings. We select the top 20 holdings and construct a portfolio weighted by their relative proportions. Holdings beyond the top 20 are excluded, as their impact on the portfolio is minimal. Focusing on the top 20 enhances practicality and reflects the institution's stock-picking ability. The portfolio is periodically rebalanced to align with updated 13F filings. Note that 13F disclosures typically have a 45-day delay (e.g., Q2 2025 data is disclosed by mid-August). Users should consider this lag when tracking the portfolio, though institutional holdings are generally long-term, emphasizing strategic rationale behind changes. This portfolio is for illustrative purposes only and does not constitute investment advice. All investment decisions are the user's responsibility. Investing involves risks, including potential loss of principal. Past performance is not indicative of future results.
Frequently Asked Questions
How many stocks does Mason Street Advisors, LLC currently hold?
As of the latest update on 2026-03-02, the Mason Street Advisors, LLC portfolio consists of 20 individual holdings. The portfolio is actively managed to optimize strategy performance.
How has Mason Street Advisors, LLC's portfolio performed recently?
Over the recent period, Mason Street Advisors, LLC has demonstrated significant growth. The portfolio currently shows a Total Return of +9.65%, with an Annualized Return of +14.45%, outperforming standard market benchmarks.
What is the total portfolio value (AUM) of Mason Street Advisors, LLC?
The current market value of Mason Street Advisors, LLC's disclosed holdings is approximately $6.16B. This figure reflects the value of assets tracked based on their latest filing.