MBB icon

iShares MBS ETF

922 hedge funds and large institutions have $31.9B invested in iShares MBS ETF in 2025 Q1 according to their latest regulatory filings, with 108 funds opening new positions, 322 increasing their positions, 402 reducing their positions, and 72 closing their positions.

New
Increased
Maintained
Reduced
Closed

more call options, than puts

Call options by funds: $ | Put options by funds: $

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

more funds holding

Funds holding:

4% less capital invested

Capital invested by funds: $33.4B → $31.9B (-$1.46B)

5.21% less ownership

Funds ownership: 91.8%86.59% (-5.2%)

20% less repeat investments, than reductions

Existing positions increased: 322 | Existing positions reduced: 402

Holders
922
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
67
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$57.7M
Puts
$4.38M
Net Calls
Net Calls Change

Top Buyers

1 +$268M
2 +$226M
3 +$126M
4
UBS AM
UBS AM
Illinois
+$98.7M
5
Jane Street
Jane Street
New York
+$85.1M
Name Holding Trade Value Shares
Change
Change in
Stake
351
$2.43M
352
$2.43M
353
$2.43M
354
$2.42M
355
$2.41M
356
$2.4M
357
$2.39M
358
$2.38M
359
$2.35M
360
$2.34M
361
$2.33M
362
$2.33M
363
$2.31M
364
$2.29M
365
$2.28M
366
$2.26M
367
$2.25M
368
$2.25M
369
$2.23M
370
$2.21M
371
$2.18M
372
$2.14M
373
$2.1M
374
$2.08M
375
$2.07M