Marshall Wace’s iShares MBS ETF MBB Stock Holding History

Marshall Wace’s Portfolio MBB Stock Details MBB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q1	–	Sell	-189,300	Closed	-$17.4M	–	2899
2024 Q4	$17.4M	Buy	189,300 +29,900	+19%	+$2.78M	0.02%	590
2024 Q3	$15.3M	Buy	159,400 +16,000	+11%	+$1.51M	0.02%	601
2024 Q2	$13.2M	Buy	143,400 +101,400	+241%	+$9.24M	0.02%	620
2024 Q1	$3.88M	Buy	+42,000	New	+$3.88M	0.01%	1101
2023 Q1	–	Sell	-12,100	Closed	-$1.12M	–	2932
2022 Q4	$1.12M	Buy	+12,100	New	+$1.12M	﹤0.01%	2034
2022 Q3	–	Sell	-4,712	Closed	-$460K	–	3610
2022 Q2	$460K	Sell	4,712 -7,472	-61%	-$733K	﹤0.01%	2826
2022 Q1	$1.24M	Sell	12,184 -25,360	-68%	-$2.65M	﹤0.01%	2344
2021 Q4	$4.03M	Buy	+37,544	New	+$4.04M	0.01%	1525

Other funds holding MBB

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

JP Morgan Chase New York $1.56T AUM 27.86% 1-Year Est. Return

Envestnet Asset Management Chicago, Illinois $374B AUM 17.66% 1-Year Est. Return

LPL Financial San Diego, California $377B AUM 19.32% 1-Year Est. Return

Fisher Asset Management Camas, Washington $295B AUM 31.6% 1-Year Est. Return

Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

TIAA Trust, National Association Charlotte, North Carolina $1.65B AUM 16.63% 1-Year Est. Return

State of Tennessee, Department of Treasury Nashville, Tennessee $29.8B AUM 29.48% 1-Year Est. Return

Stifel Financial St. Louis, Missouri $109B AUM 21.36% 1-Year Est. Return

Marshall Wace's MBB Position: Q1 2025 in Review

Marshall Wace sold out of iShares MBS ETF (MBB) in Q1 2025, closing a stake of 189,300 shares — an estimated $17.4M sold.

Marshall Wace first reported a position in MBB in Q4 2021 and held it in 8 quarters. The position peaked at $17.4M in Q4 2024. 931 funds tracked by Wall St. Rank hold MBB as of Q1 2025.

Marshall Wace reported no remaining iShares MBS ETF position as of Q1 2025 after selling out during the quarter.
Marshall Wace sold 189,300 iShares MBS ETF shares in Q1 2025, an estimated $17.4M.
Marshall Wace first reported a position in iShares MBS ETF in Q4 2021 and held it in 8 quarters.
Marshall Wace's iShares MBS ETF position peaked at $17.4M in Q4 2024.
931 funds tracked by Wall St. Rank held iShares MBS ETF as of Q1 2025.

Based on Marshall Wace's 13F filing for Q1 2025, filed 15 May 2025.