Jane Street
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Jane Street’s iShares MBS ETF MBB Stock Holding History

Jane Street’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
Q2 		– Sell
-16,100
Closed -$1.53M – 12497
2026
Q1 		$1.53M Buy
16,100
+7,200
+81% +$688K ﹤0.01% 5606
2025
Q4 		$847K Sell
8,900
-12,200
-58% -$1.16M ﹤0.01% 6481
2025
Q3 		$2.01M Buy
+21,100
New +$1.98M ﹤0.01% 4925
2022
Q2 		– Sell
-645,000
Closed -$65.7M – 10395
2022
Q1 		$65.7M Buy
+645,000
New +$67.3M 0.02% 558

Other funds holding MBB

Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
JP Morgan Chase
JP Morgan Chase New York $1.81T AUM 41.13% 1-Year Est. Return
Envestnet Asset Management
Envestnet Asset Management Chicago, Illinois $424B AUM 22.96% 1-Year Est. Return
LPL Financial
LPL Financial San Diego, California $445B AUM 25.58% 1-Year Est. Return
UBS Group
UBS Group Zurich, Switzerland $786B AUM 40.34% 1-Year Est. Return
TWIM
TIAA Wealth Investment Management New York $15B AUM
Ameriprise
Ameriprise Minneapolis, Minnesota $495B AUM 43.24% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
TCIIS
TIAA-CREF Individual & Institutional Services New York $29.1B AUM
Truist Financial
Truist Financial Charlotte, North Carolina $83.7B AUM 27.22% 1-Year Est. Return

Jane Street's MBB Position: Q2 2026 in Review

Jane Street reduced its iShares MBS ETF (MBB) stake by 48% in Q2 2026, selling an estimated $8.97M and leaving 102,125 shares worth $9.65M. The position accounts for ﹤0.01% of the portfolio, ranked #2874.

Jane Street first reported a position in MBB in Q2 2013 and has held it in 34 quarters since. The position peaked at $1.01B in Q2 2021. 1,026 funds tracked by Wall St. Rank hold MBB as of Q2 2026.

  • Jane Street held 102,125 shares of iShares MBS ETF worth $9.65M as of Q2 2026.
  • Jane Street sold 94,874 iShares MBS ETF shares in Q2 2026, an estimated $8.97M.
  • iShares MBS ETF made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #2874 holding.
  • Jane Street first reported a position in iShares MBS ETF in Q2 2013 and has held it in 34 quarters since.
  • Jane Street's iShares MBS ETF position peaked at $1.01B in Q2 2021.
  • 1,026 funds tracked by Wall St. Rank held iShares MBS ETF as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.