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MBB Institutional Ownership & 13F Holders | SmartMoneyDB

MBBISHARES TR

MBS ETF · CUSIP 464288588

Smart Money Ownership

Of the 9 tracked institutions holding MBB, 6 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +3.7pt. It's a gauge of who owns the name, not just how many.

Gotham Asset Management, LLC

$1.4M

+2.5pt

MBB (ISHARES TR) Institutional Ownership Summary

Among the 9 tracked institutional investors we monitor, MBB (ISHARES TR) is held with a combined value of $475.03M across 5,002,962 shares. The largest holder is BlackRock, Inc. with a position worth $211.02M. 2 funds opened new positions in the most recent quarter. 3 funds increased their holdings. 3 funds reduced their position.

Total Institutional Value

$475.03M

Total Shares Held

5,002,962

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

CITADEL ADVISORS LLCNew position~$12.1M RENAISSANCE TECHNOLOGIES LLC+234% shares~$1.9M FMR LLC+1% shares~$434.2K AQR CAPITAL MANAGEMENT LLC+8% shares~$77.8K HARRIS ASSOCIATES L PNew position~$2.7K

13F Institutional Holders

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BlackRock, Inc.

0.00% of book-1.3%

$211.02M

Bridgewater Associates, LP

0.58% of book-1.1%

$129.13M

Fisher Asset Management, LLC

RENAISSANCE TECHNOLOGIES LLC

0.00% of book+233.9%

$2.66M

Gotham Asset Management, LLC

0.00% of book-

$1.35M

AQR CAPITAL MANAGEMENT LLC

0.00% of book+7.5%

$1.11M

HARRIS ASSOCIATES L P

0.00% of bookNew

$2.66K

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$211.02M	2,222,389	0.00%	-1.3%
2	Bridgewater Associates, LP	$129.13M	1,360,000	0.58%	-1.1%
3	Fisher Asset Management, LLC	$83.81M	882,651	0.03%	-16.4%
4	FMR LLC	$33.84M	356,352	0.00%	+1.3%
5	CITADEL ADVISORS LLC	$12.11M	127,545	0.01%	New
6	RENAISSANCE TECHNOLOGIES LLC	$2.66M	28,000	0.00%	+233.9%
7	Gotham Asset Management, LLC	$1.35M	14,226	0.00%	-
8	AQR CAPITAL MANAGEMENT LLC	$1.11M	11,771	0.00%	+7.5%
9	HARRIS ASSOCIATES L P	$2.66K	28	0.00%	New

Congress Trading

1 member · 8 disclosed trades in MBB

Member	Type	Amount	Date
John Boozman	Buy	$1,001 - $15,000	May 27, 2026
John Boozman	Sell	$1,001 - $15,000	May 13, 2026
John Boozman	Sell	$1,001 - $15,000	Feb 6, 2026
John Boozman	Buy	$1,001 - $15,000

Frequently Asked Questions

Which institutional investors own the most MBB stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of MBB with a position worth $211.02M, representing 0.00% of their portfolio. In total, 9 institutional investors hold MBB with a combined value of $475.03M.

Are hedge funds buying or selling MBB?

In the most recent quarter, 2 funds opened a new position in MBB. Additionally, 3 increased their holdings and 3 reduced their positions.

What percentage of MBB is owned by institutional investors?

Institutional investors hold $475.03M worth of MBB stock across 9 positions. The largest institutional holder is BlackRock, Inc. with $211.02M in holdings.

What is a 13F filing and why does it matter for MBB?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For MBB, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track MBB institutional moves

Get notified when hedge funds change their MBB positions.