ISHARES TR MBS ETF (MBB): Institutional Ownership

Hedge funds and institutional managers reporting a position in MBB. Based on the most recent 13F filing from each holder, sourced from SEC EDGAR.

Reported Holders

13F filers

Aggregate Value

$230.2M

Across holders

Last Price

$94.93

2026-06-26

Sector

GICS

Holder activity2 new3 added3 reduced

Institutional Holders of MBB

↗

9 holders

Manager⇅	Type⇅	Shares⇅	Market Value▼	% of Total⇅	% of Portfolio⇅	Action⇅	QoQ Change⇅	Quarter⇅
Bridgewater Associates, LP CIK 0001350694	Hedge Fund	1.36M	$129.1M	56.1%	0.6%	Reduced	$-1.5M	Q1 2026
Fisher Asset Management, LLC CIK 0000850529	Institutional Manager	883K	$83.8M	36.4%	0.0%	Reduced	$-16.4M	Q1 2026
Ancora Advisors, LLC CIK 0001446114	Hedge Fund	122K	$11.5M	5.0%	0.2%	Added	+$11.3M	Q1 2026
RENAISSANCE TECHNOLOGIES LLC CIK 0001037389	Hedge Fund	28K	$2.7M	1.2%	0.0%	Added	+$1.9M	Q1 2026
Gotham Asset Management, LLC CIK 0001510387	Hedge Fund	14K	$1.4M	0.6%	0.0%	Unchanged	+$0	Q1 2026
AQR CAPITAL MANAGEMENT LLC CIK 0001167557	Hedge Fund	12K	$1.1M	0.5%	0.0%	Added	+$78K	Q1 2026
CITADEL ADVISORS LLC CIK 0001423053	Hedge Fund	5K	$427K	0.2%	0.0%	Reduced	$-1.5M	Q1 2026
Qube Research & Technologies Ltd CIK 0001729829	Hedge Fund	2K	$205K	0.1%	0.0%	New	—	Q4 2025
HARRIS ASSOCIATES L P CIK 0000813917	Institutional Manager	28	$3K	0.0%	0.0%	New	—	Q1 2026

$129.1M· 56.1% of total· 0.6% port· 1.36M sh· $-1.5M QoQ· Q1 2026

$83.8M· 36.4% of total· 0.0% port· 883K sh· $-16.4M QoQ· Q1 2026

$11.5M· 5.0% of total· 0.2% port· 122K sh· +$11.3M QoQ· Q1 2026

$2.7M· 1.2% of total· 0.0% port· 28K sh· +$1.9M QoQ· Q1 2026

$1.4M· 0.6% of total· 0.0% port· 14K sh· +$0 QoQ· Q1 2026

$1.1M· 0.5% of total· 0.0% port· 12K sh· +$78K QoQ· Q1 2026

$427K· 0.2% of total· 0.0% port· 5K sh· $-1.5M QoQ· Q1 2026

$205K· 0.1% of total· 0.0% port· 2K sh· — QoQ· Q4 2025

$3K· 0.0% of total· 0.0% port· 28 sh· — QoQ· Q1 2026