XTX Topco’s iShares MBS ETF MBB Stock Holding History

XTX Topco’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
2026 Q1	–	Sell	-3,840	Closed	-$366K	–	4132
2025 Q4	$366K	Buy	3,840 +1,676	+77%	+$160K	0.01%	1891
2025 Q3	$206K	Sell	2,164 -3,338	-61%	-$314K	0.01%	1827
2025 Q2	$517K	Buy	+5,502	New	+$510K	0.02%	1074

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

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

TWIM

TIAA Wealth Investment Management New York $13.1B AUM

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

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

TCIIS

TIAA-CREF Individual & Institutional Services New York $26B AUM

Truist Financial Charlotte, North Carolina $74.2B AUM 21.09% 1-Year Est. Return

XTX Topco's MBB Position: Q1 2026 in Review

XTX Topco sold out of iShares MBS ETF (MBB) in Q1 2026, closing a stake of 3,840 shares — an estimated $366K sold.

XTX Topco first reported a position in MBB in Q2 2025 and held it in 3 quarters. The position peaked at $517K in Q2 2025. 1,019 funds tracked by Wall St. Rank hold MBB as of Q1 2026.

XTX Topco reported no remaining iShares MBS ETF position as of Q1 2026 after selling out during the quarter.
XTX Topco sold 3,840 iShares MBS ETF shares in Q1 2026, an estimated $366K.
XTX Topco first reported a position in iShares MBS ETF in Q2 2025 and held it in 3 quarters.
XTX Topco's iShares MBS ETF position peaked at $517K in Q2 2025.
1,019 funds tracked by Wall St. Rank held iShares MBS ETF as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.