Who owns MBBWhat MBB owns — n/a

Who owns iShares MBS ETF?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.

Institutional ownership of MBB from SEC Form 13F filings across 1,028 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 1,028 institutions disclosed 371.8M shares of iShares MBS ETF worth $35.16B — about 87.1% of shares outstanding; the largest disclosed holder is BANK OF AMERICA CORP /DE/. Source: SEC Form 13F filings, parsed by EvidInvest.

1,028

13F holders

$35.16B

value, 2026 filers

87.1%

of shares outstanding (371.8M sh)

108

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of MBB's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	BANK OF AMERICA CORP /DE/	68.3M	$6.45B	0.4%	16%	+3.1%
2	JPMORGAN CHASE & CO	37.8M	$3.59B	0.2%	8.9%	+1.7%
3	ENVESTNET ASSET MANAGEMENT INC	30.9M	$2.92B	0.7%	7.2%	+6.9%
4	LPL Financial LLC	27.1M	$2.56B	0.6%	6.4%	-3.1%
5	UBS Group AG	18.5M	$1.75B	0.2%	4.3%	-15.3%
6	TIAA Wealth Investment Management LLC	14.8M	$1.40B	9.4%	3.5%	+5.2%
7	AMERIPRISE FINANCIAL INC	13.7M	$1.29B	0.3%	3.2%	+3.8%
8	MORGAN STANLEY	11.5M	$1.09B	0.1%	2.7%	+6.9%
9	TIAA-CREF INDIVIDUAL & INSTITUTIONAL SERVICES, LLC	7.7M	$725.8M	2.5%	1.8%	+2.7%
10	TRUIST FINANCIAL CORP	5.5M	$523.8M	0.6%	1.3%	-4.1%
11	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC	4.3M	$404.4M	0.1%	1%	-0.5%
12	STIFEL FINANCIAL CORP	3.7M	$353.7M	0.3%	0.9%	+0.9%
13	PNC Financial Services Group, Inc.	3.3M	$309.9M	0.2%	0.8%	+5.6%
14	Allworth Financial LP	3.0M	$286.9M	1.2%	0.7%	-8.9%
15	WELLS FARGO & COMPANY/MN	2.9M	$275.3M	0.0%	0.7%	+7.4%
16	BANK OF MONTREAL /CAN/	2.8M	$265.0M	0.1%	0.7%	-18.2%
17	State of Tennessee, Department of Treasury	2.7M	$250.9M	0.7%	0.6%	+7.1%
18	MIDLAND WEALTH ADVISORS, LLC	2.5M	$238.1M	11.2%	0.6%	+1.8%
19	Bank of New York Mellon Corp	2.4M	$228.8M	0.0%	0.6%	+4.6%
20	SEI INVESTMENTS CO	2.4M	$225.0M	0.2%	0.6%	+8.5%
21	Composition Wealth, LLC	2.4M	$222.4M	2.6%	0.6%	+16.2%
22	BlackRock, Inc.	2.3M	$218.5M	0.0%	0.5%	+4.0%
23	Cetera Investment Advisers	2.1M	$202.9M	0.2%	0.5%	+5.9%
24	Envestnet Portfolio Solutions, Inc.	2.1M	$200.3M	1.0%	0.5%	+9.8%
25	CLIFTONLARSONALLEN WEALTH ADVISORS, LLC	2.0M	$185.0M	2.4%	0.5%	+2.4%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.