What are the top holdings of MUB?

iShares National Muni Bond ETF holds 7412 securities in total. The largest positions and their portfolio weights are listed on the Holdings tab.

How many holdings does MUB have?

MUB holds 7412 positions as reported by the fund's most recent disclosure.

What sectors does MUB invest in?

iShares National Muni Bond ETF (MUB) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.

What sector is MUB most exposed to?

MUB's full sector breakdown is on the Sectors tab. The largest sector weight is shown there along with the rest of the allocation.

Is MUB a US-only fund?

The country allocation card on this page shows MUB's geographic exposure. Funds with > 95% US weight are effectively US-only; international or global funds will show meaningful weights across multiple countries.

What does MUB invest in?

This exchange-traded fund is designed to closely replicate the performance of a designated index, which exclusively comprises high-quality municipal bonds issued across the United States.

MUB

iShares National Muni Bond ETF

AMEX·Asset Management, Bonds · Financial Services

$101.08$0.34+0.34%

Market closed·Oct 9 4:00 PM EDT

Portfolio as of February 28, 2026, from the fund's SEC Form N-PORT filing. Funds disclose holdings quarterly, with a ~60-day publication delay. The fund filed 6,264 positions; the 1,000 largest by weight are shown. Sector breakdowns aren't part of this filing, so none is shown.

Top Holdings

1000

holdings

09248U841
BlackRock Liquidity Funds
0.56%
91514ANG6
Board of Regents of the University of Texas System
0.21%
20775DL75
Connecticut State Health & Educational Facilities Authority
0.20%
047870NE6
City of Atlanta Water & Wastewater
0.19%
667826HG9
Northwest Independent School District
0.16%
650028ZA4
New York State Thruway Authority
0.16%
442378GP4
Houston Higher Education Finance Corp.
0.15%
64990FPV0
New York State Dormitory Authority
0.14%
677632T92
Ohio State University (The)
0.14%
13063D7Q5
State of California
0.13%
Other
990 more holdings
44.18%

Top 10 holdings

2.04%

Top 25 holdings

3.79%

Concentration index

0.0013

Effective holdings

748

Chart tools

Open Top Holdings in Chart Builder to fine-tune colors, labels, and timeframe, then download a high-res PNG.

All Holdings (1000)

#	TickerHolding	Name	Weight	Shares	Market Value
1	09248U84109248U841BlackRock Liquidity Funds	BlackRock Liquidity Funds	0.56%	242.96M	$242.98M
2	91514ANG691514ANG6Board of Regents of the University of Texas System	Board of Regents of the University of Texas System	0.21%	75.56M	$90.01M
3	20775DL7520775DL75Connecticut State Health & Educational Facilities Authority	Connecticut State Health & Educational Facilities Authority	0.20%	85.00M	$85.00M
4	047870NE6047870NE6City of Atlanta Water & Wastewater	City of Atlanta Water & Wastewater	0.19%	82.03M	$82.28M
5	667826HG9667826HG9Northwest Independent School District	Northwest Independent School District	0.16%	64.99M	$69.47M
6	650028ZA4650028ZA4New York State Thruway Authority	New York State Thruway Authority	0.16%	66.13M	$69.24M
7	442378GP4442378GP4Houston Higher Education Finance Corp.	Houston Higher Education Finance Corp.	0.15%	54.58M	$64.91M
8	64990FPV064990FPV0New York State Dormitory Authority	New York State Dormitory Authority	0.14%	63.59M	$60.67M
9	677632T92677632T92Ohio State University (The)	Ohio State University (The)	0.14%	50.00M	$59.85M
10	13063D7Q513063D7Q5State of California	State of California	0.13%	50.00M	$57.72M
11	646039YM3646039YM3State of New Jersey	State of New Jersey	0.13%	53.89M	$57.39M
12	93974EVY993974EVY9State of Washington	State of Washington	0.13%	53.23M	$56.39M
13	709224M30709224M30Pennsylvania Turnpike Commission	Pennsylvania Turnpike Commission	0.12%	52.72M	$52.72M
14	16772PEP716772PEP7Chicago Transit Authority Sales Tax Receipts Fund	Chicago Transit Authority Sales Tax Receipts Fund	0.12%	50.00M	$51.56M
15	646067HR2646067HR2New Jersey Educational Facilities Authority	New Jersey Educational Facilities Authority	0.12%	45.27M	$50.75M
16	940859BX8940859BX8Washoe County School District	Washoe County School District	0.12%	52.64M	$50.70M
17	646067KD9646067KD9New Jersey Educational Facilities Authority	New Jersey Educational Facilities Authority	0.12%	45.00M	$50.58M
18	271843AB0271843AB0East County Advanced Water Purification Joint Powers Authority	East County Advanced Water Purification Joint Powers Authority	0.12%	50.37M	$50.43M
19	13063D4Q813063D4Q8State of California	State of California	0.12%	42.70M	$49.71M
20	452152P96452152P96State of Illinois	State of Illinois	0.11%	47.43M	$49.47M

Showing 20 of 1,000

Sectors

sector

Cash & Others
100.00%

Top 3 sectors

100.00%

Top 5 sectors

100.00%

Concentration index

1.0000

Effective sectors

Chart tools

Open Sector Allocation in Chart Builder to fine-tune colors, labels, and timeframe, then download a high-res PNG.

Countries

Domicile

United States · 46.22%

Asset Classes

Primary asset class

Fixed income

Strategy

Passive Index

Income strategy

Bond yield

Issuer-reported asset class: Fixed Income

Frequently Asked Questions About MUB

What are the top holdings of MUB?: iShares National Muni Bond ETF holds 7412 securities in total. The largest positions and their portfolio weights are listed on the Holdings tab.
How many holdings does MUB have?: MUB holds 7412 positions as reported by the fund's most recent disclosure.
What sectors does MUB invest in?: iShares National Muni Bond ETF (MUB) allocates across the sectors shown above. The largest exposure tops the list; the rest follow in descending weight order.
What sector is MUB most exposed to?: MUB's full sector breakdown is on the Sectors tab. The largest sector weight is shown there along with the rest of the allocation.
Is MUB a US-only fund?: The country allocation card on this page shows MUB's geographic exposure. Funds with > 95% US weight are effectively US-only; international or global funds will show meaningful weights across multiple countries.
What does MUB invest in?: This exchange-traded fund is designed to closely replicate the performance of a designated index, which exclusively comprises high-quality municipal bonds issued across the United States.

TickerHolding

Name

Weight

Market Value

09248U84109248U841BlackRock Liquidity Funds

BlackRock Liquidity Funds

0.56%

242.96M

$242.98M

91514ANG691514ANG6Board of Regents of the University of Texas System

Board of Regents of the University of Texas System

0.21%

75.56M

$90.01M

20775DL7520775DL75Connecticut State Health & Educational Facilities Authority

Connecticut State Health & Educational Facilities Authority

0.20%

85.00M

$85.00M

047870NE6047870NE6City of Atlanta Water & Wastewater

City of Atlanta Water & Wastewater

0.19%

82.03M

$82.28M

667826HG9667826HG9Northwest Independent School District

Northwest Independent School District

0.16%

64.99M

$69.47M

650028ZA4650028ZA4New York State Thruway Authority

New York State Thruway Authority

0.16%

66.13M

$69.24M

442378GP4442378GP4Houston Higher Education Finance Corp.

Houston Higher Education Finance Corp.

0.15%

54.58M

$64.91M

64990FPV064990FPV0New York State Dormitory Authority

New York State Dormitory Authority

0.14%

63.59M

$60.67M

677632T92677632T92Ohio State University (The)

Ohio State University (The)

0.14%

50.00M

$59.85M

13063D7Q513063D7Q5State of California

State of California

0.13%

50.00M

$57.72M

646039YM3646039YM3State of New Jersey

State of New Jersey

0.13%

53.89M

$57.39M

93974EVY993974EVY9State of Washington

State of Washington

0.13%

53.23M

$56.39M

709224M30709224M30Pennsylvania Turnpike Commission

Pennsylvania Turnpike Commission

0.12%

52.72M

$52.72M

16772PEP716772PEP7Chicago Transit Authority Sales Tax Receipts Fund

Chicago Transit Authority Sales Tax Receipts Fund

0.12%

50.00M

$51.56M

646067HR2646067HR2New Jersey Educational Facilities Authority

New Jersey Educational Facilities Authority

0.12%

45.27M

$50.75M

940859BX8940859BX8Washoe County School District

Washoe County School District

0.12%

52.64M

$50.70M

646067KD9646067KD9New Jersey Educational Facilities Authority

New Jersey Educational Facilities Authority

0.12%

45.00M

$50.58M

271843AB0271843AB0East County Advanced Water Purification Joint Powers Authority

East County Advanced Water Purification Joint Powers Authority

0.12%

50.37M

$50.43M

13063D4Q813063D4Q8State of California

State of California

0.12%

42.70M

$49.71M

452152P96452152P96State of Illinois

State of Illinois

0.11%

47.43M

$49.47M