Jane Street’s iShares MBS ETF MBB Stock Holding History
Bought
Maintained
Sold
Other funds holding MBB
TWIM
TCIIS
Jane Street's MBB Position: Q1 2026 in Review
Jane Street opened a new position in iShares MBS ETF (MBB) in Q1 2026: 196,999 shares worth $18.7M. The stake represents ﹤0.01% of the portfolio and ranks #1840 among its holdings. This is a return to the name: Jane Street previously reported a position in MBB as recently as Q1 2025.
Jane Street first reported a position in MBB in Q2 2013 and has held it in 33 quarters since. The position peaked at $1.01B in Q2 2021. 1,019 funds tracked by Wall St. Rank hold MBB as of Q1 2026.
- Jane Street held 196,999 shares of iShares MBS ETF worth $18.7M as of Q1 2026.
- iShares MBS ETF was a new Jane Street position in Q1 2026.
- iShares MBS ETF made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #1840 holding.
- Jane Street first reported a position in iShares MBS ETF in Q2 2013 and has held it in 33 quarters since.
- Jane Street's iShares MBS ETF position peaked at $1.01B in Q2 2021.
- 1,019 funds tracked by Wall St. Rank held iShares MBS ETF as of Q1 2026.
Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.