MASON STREET ADVISORS, LLC

MILWAUKEE, WI · CIK 1167711 · 13F filing filed 2026-08-12

SEC-registered investment adviser since 2001 · limited liability company

Assets managed$39.1bn
Staff13 · 13 in investment roles
Main clients (by assets)Mutual funds and ETFs 100%
Form ADV · 2026-03-31SEC adviser record

Legal entityMASON STREET ADVISORS, LLC (US)
Part of The Northwestern Mutual Life Insurance Company (US)

Other 13F filers in this group: NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC $8.5bn

Kindprivate equity, structured credit, mutual funds, institutions, futures
Others nearbyMilwaukee, WI, New York, NY
FamilyThe Northwestern Mutual Life Insurance Company · 2 related pages · largest: NORTHWESTERN MUTUAL INVESTMENT MANAGEMENT COMPANY, LLC

As an employer

Offices in1 country

US visa salary filings

Filings FY2024–2026305
Median salary offered$132,000
Middle half$120,481 – $148,000
Job titles83
E-3 (Australians)1

Job title	Filings	Median	Range
Senior Software EngineerFranklin, WI	68	$134,332	$110,000 – $169,175
Software EngineerMilwaukee, WI	37	$118,000	$95,000 – $130,000
Lead Software EngineerMilwaukee, WI	19	$153,650	$134,350 – $168,000
Senior Data EngineerMilwaukee, WI	16	$128,298	$110,000 – $144,024
Senior Systems Software EngineerFranklin, WI	11	$129,500	$119,000 – $157,192
Senior Systems EngineerFranklin, WI	10	$130,225	$118,420 – $140,159
Systems EngineerFranklin, WI	8	$104,211	$88,000 – $120,481
Manager Software EngineeringMilwaukee, WI	7	$163,836	$148,701 – $172,872
Senior Analytics EngineerMckinney, TX	6	$135,492	$124,323 – $149,695
Manager, Software EngineeringFranklin, WI	5	$148,694	$148,689 – $159,119
Senior Iam EngineerCumming, GA	5	$130,000	$126,000 – $136,350
Data EngineerMilwaukee, WI	5	$110,000	$99,000 – $113,000

28 more job titles

Iam EngineerFranklin, WI	5	$101,900	$94,500 – $117,929
Senior Data ScientistNew York, NY	4	$146,922	$141,470 – $152,985
Senior Product ManagerBuford, GA	4	$133,492	$112,050 – $158,100
Senior Support EngineerFranklin, WI	4	$115,675	$105,264 – $122,100
Systems Software EngineerFranklin, WI	4	$114,096	$108,697 – $117,998
Test EngineerMilwaukee, WI	4	$93,088	$83,832 – $97,879
Lead Data EngineerFranklin, WI	3	$156,374	$152,201 – $158,583
Engineering Test LeadDunellen, NJ	3	$141,590	$132,000 – $148,000
Site Reliability EngineerFrisco, TX	3	$129,891	$121,333 – $138,014
Penetration TesterMilwaukee, WI	3	$122,400	$109,833 – $127,000
Principal Product ManagerMilwaukee, WI	2	$206,383	$182,766 – $230,000
Principal Software EngineerMilwuakee, WI	2	$191,774	$183,850 – $199,698
Assistant Director Software EngineeringFranklin, WI	2	$167,116	$145,600 – $188,631
Software Engineering ManagerAventura, FL	2	$163,065	$156,130 – $170,000
Manager Of Data EngineeringDelaware, OH	2	$147,786	$142,771 – $152,800
Data ScientistLeander, TX	2	$135,466	$135,105 – $135,828
Senior Cyber Risk Analytics EngineerIrving, TX	2	$131,826	$128,610 – $135,041
Software Development Engineer In TestFranklin, WI	2	$131,626	$108,253 – $155,000
Senior Cyber Security EngineerFranklin, WI	2	$126,060	$121,128 – $130,993
Senior Test EngineerFranklin, WI	2	$115,450	$113,400 – $117,500
Senior Director Of Software EngineeringNew York, NY	1	$275,000
Senior Director Iam EngineeringNew York, NY	1	$231,132
Lead EngineerLivermore, CA	1	$188,664
Assistant Director “ Data Science And AnalyticsRochester, NY	1	$187,372
Lead Test EngineerMilwaukee, WI	1	$181,376
Software Engineer LeadClarksburg, MD	1	$178,000
Principal Iam EngineerAustin, TX	1	$170,000
Lead Enterprise ArchitectMilwaukee, WI	1	$167,230

Source: US Department of Labor, Labor Condition Application disclosure data (certified, full-time, yearly equivalent). These are the salaries the employer committed to pay the visa roles it filed for, at least the prevailing wage for the job and place; they are not the pay of all its staff. Filed by: Northwestern Mutual Life Insurance Company, Northwestern Mutual Wealth Management Company.

$1.1bn reported value +8.5% vs Q1 2026

15positions

90.6%in top 10

1 new 11 added 3 reduced 1 sold out vs Q1 2026

Also in the report of:

NORTHERN TRUST CORP

Shares in two reports are counted once in each security's totals.

Holdings, Q2 2026

The small lines show how much was held over the last 4 quarters (adjusted for stock splits).

#	Security	Ticker	Shares	Value	% of portfolio	Change	Shares change
1	ISHARES TR CORE US AGGBD ET AGG	AGG	3,050,830	$302.0m27.21%	27.21%	Added +1.6k	+1,567 0.1%
2	ISHARES TR CORE S&P500 ETF IVV	IVV	206,485	$154.6m13.93%	13.93%	Reduced -5.2k	-5,196 -2.5%
3	SPDR SER TR PORTFOLIO LN TSR SPTL	SPTL	4,005,960	$105.1m9.47%	9.47%	Added +7.2k	+7,240 0.2%
4	SPDR SERIES TRUST PORTFOLIO S&P400 SPMD	SPMD	1,419,072	$95.9m8.64%	8.64%	Reduced -142.9k	-142,897 -9.2%
5	SPDR SER TR PORTFOLIO S&P600 SPSM	SPSM	1,379,248	$79.5m7.17%	7.17%	Added +52.8k	+52,825 4.0%
6	INVESCO EXCHANGE TRADED FD T S&P500 EQL WGT RSP	RSP	288,645	$61.4m5.53%	5.53%	Added +20.8k	+20,825 7.8%
7	ISHARES TR CORE MSCI EAFE IEFA	IEFA	634,753	$61.3m5.52%	5.52%	Reduced -76.2k	-76,244 -10.7%
8	SPDR SER TR DJ REIT ETF RWR	RWR	453,255	$51.2m4.61%	4.61%	Added +104.6k	+104,580 30.0%
9	SCHWAB STRATEGIC TR US REIT ETF SCHH	SCHH	2,161,115	$51.2m4.61%	4.61%	Added +515.0k	+514,990 31.3%
10	AMERICAN CENTY ETF TR US LARGE CAP VLU AVLV	AVLV	474,820	$43.3m3.90%	3.90%	New
11	ISHARES TR MSCI INTL QUALTY IQLT	IQLT	792,666	$39.3m3.54%	3.54%	Added +23.7k	+23,736 3.1%
12	J P MORGAN EXCHANGE TRADED F ULTRA SHRT ETF JPST	JPST	494,716	$25.0m2.25%	2.25%	Added +8.4k	+8,380 1.7%
13	DIMENSIONAL ETF TRUST INTERNATNAL VAL DFIV	DFIV	414,285	$22.4m2.02%	2.02%	Added +11.0k	+10,970 2.7%
14	ABRDN ETFS BBRG ALL COMD K1 BCI	BCI	540,495	$12.1m1.09%	1.09%	Added +184.2k	+184,160 51.7%
15	ISHARES INC CORE MSCI EMKT IEMG	IEMG	68,080	$5.6m0.51%	0.51%	Added +24.6k	+24,560 56.4%

Sold out since Q1 2026

Security	Ticker	Shares held before	Value then
ISHARES TR VLUE	VLUE	288,200	$41.0m288.2k shares