Institutional Manager · CIK 0001167711

MASON STREET ADVISORS, LLC

MILWAUKEE, WI · File #028-10206

Latest AUM

$1.02B

Positions

Top-10 Concentration

91.6%

Filings

Portfolio Value Over Time

2024-03

2024-06

2024-09

2024-12

2025-03

2025-06

2025-09

2025-12

Biggest QoQ Changes

Ranked by conviction flow (share change × current price) so mark-to-market moves don't dominate. Price effect column shows how much of the $ change was just the stock moving.

Action	Issuer	Ticker / CUSIP	Δ Shares	Flow ($)	Price Effect
NEW	ISHARES TR	464287804	+639,005	+$57.2M	$0
REDUCE	ISHARES TR	46432F842	-626,055	-$42.1M	-$12.7M
EXITED	ISHARES TR	46432F388	-320,000	-$40.0M	$0
NEW	ISHARES TR	464287507	+289,860	+$39.6M	$0
ADD	INVESCO EXCHANGE TRADED FD T	IVZ	+106,820	+$20.5M	+$283,855
ADD	SPDR SERIES TRUST	78464A847	+225,190	+$13.0M	+$980,784
ADD	ISHARES TR	464287226	+67,900	+$6.8M	-$1.1M
ADD	SPDR SERIES TRUST	78468R853	+130,180	+$6.1M	+$628,398
REDUCE	DIMENSIONAL ETF TRUST	25434V807	-49,750	-$2.5M	+$1.7M
ADD	SCHWAB STRATEGIC TR	808524847	+85,915	+$1.8M	-$1.1M

Sector Allocation

Financials

4.9%$49.7M

Filing History

Feb 4, 202613F COMBINATION REPORTQ/E Dec 202515 pos · $1.02B
Oct 31, 202513F COMBINATION REPORTQ/E Sep 202515 pos · $964.8M
Aug 8, 202513F COMBINATION REPORTQ/E Jun 202515 pos · $854.5M
May 14, 202513F COMBINATION REPORTQ/E Mar 202513 pos · $786.1M
Feb 10, 202513F COMBINATION REPORTQ/E Dec 202412 pos · $772.6M
Nov 12, 202413F COMBINATION REPORTQ/E Sep 202412 pos · $823.5M
Aug 15, 202413F COMBINATION REPORTQ/E Jun 202412 pos · $743.0M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $109.1M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $93.2M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202410 pos · $108.1M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202412 pos · $130.4M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202410 pos · $74.6M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $122.3M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202410 pos · $93.0M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $95.5M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202410 pos · $93.3M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $118.2M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202411 pos · $107.5M
Jun 26, 202413F HOLDINGS REPORT (Amended)Q/E Jun 202410 pos · $98.7M
May 15, 202413F COMBINATION REPORTQ/E Mar 20248 pos · $594.2M

Top 15 Holdings — Dec 2025

#	Issuer	Ticker	Shares	Value	% of Portfolio
1	ISHARES TR	464287226	3,107,230	$310.4M	30.54%
2	ISHARES TR	464287200	210,793	$144.4M	14.21%
3	SPDR SERIES TRUST	78464A664	3,997,680	$105.8M	10.41%
4	SPDR SERIES TRUST	78464A847	1,587,390	$91.9M	9.04%
5	SPDR SERIES TRUST	78468R853	1,293,880	$60.6M	5.97%
6	ISHARES TR	464287804	639,005	$57.2M	5.62%
7	INVESCO EXCHANGE TRADED FD T	IVZ	259,430	$49.7M	4.89%
8	ISHARES TR	464287507	289,860	$39.6M	3.90%
9	SPDR SERIES TRUST	78464A607	366,555	$36.0M	3.54%
10	SCHWAB STRATEGIC TR	808524847	1,713,085	$35.8M	3.52%
11	ISHARES TR	46434V456	748,240	$34.0M	3.35%
12	J P MORGAN EXCHANGE TRADED F	46641Q837	480,735	$24.3M	2.39%
13	DIMENSIONAL ETF TRUST	25434V807	393,365	$19.6M	1.93%
14	ABRDN ETFS	003261104	337,715	$6.6M	0.65%
15	ISHARES TR	46432F842	5,700	$383,154	0.04%