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ZMUN · NASDAQ · ETF

F/m Ultrashort Tax-Free Municipal ETF (ZMUN) Price, Holdings & Fees

$564.20+1.26%+$7.01End-of-day price as of Oct 9, 2026

F/m Ultrashort Tax-Free Municipal ETF (ZMUN) closed at $564.20 on Oct 9, 2026, up 1.26% from the previous close of $557.19.

Share price, past year

1Y +21.41%

52-week range $461.81 – $568.26. Daily closing prices.
Monthly closing prices
Last closing price of each month
DateClose
Oct 9, 2026$564.20
Sep 30, 2026$562.12
Aug 31, 2026$541.69
Jul 31, 2026$501.37
Jun 30, 2026$503.32
May 29, 2026$531.34
Apr 30, 2026$548.69
Mar 31, 2026$533.39
Feb 27, 2026$539.66
Jan 30, 2026$546.74
Dec 31, 2025$531.02
Nov 28, 2025$501.96
Oct 31, 2025$479.32

Key statistics

Expense ratio
0.30%
as of Sep 30, 2025
Net assets
$27M
as of May 31, 2026
Holdings
158
as of May 31, 2026
52-week range
$461.81 – $568.26

F/m Ultrashort Tax-Free Municipal ETF's expense ratio is 0.30%: $30.00 a year on $10,000 invested.

Holdings

F/m Ultrashort Tax-Free Municipal ETF held 158 investments worth $27.03M as of May 31, 2026. Its largest holding was BlackRock Liquidity Funds Muni, at 10.13% of the fund.

F/m Ultrashort Tax-Free Municipal ETF largest holdings by share of net assets
#Holding% of fundValue
1BlackRock Liquidity Funds Muni10.13%$2.74M
2SOUTH DAKOTA ST HLTH & EDUCTNL3.70%$1.00M
3NEW YORK ST DORM AUTH ST PERSO2.79%$753.27K
4UNIV OF KENTUCKY KY GEN RECPTS2.72%$735.00K
5GREAT LAKES MI WTR AUTH WTR SP2.60%$701.67K
6LEE CNTY FL SCH BRD COPS2.39%$646.81K
7ILLINOIS ST2.23%$601.33K
8NORTH CAROLINA ST MUNI PWR AGY2.17%$585.85K
9WASHINGTON ST1.86%$502.06K
10LOS ANGELES CNTY CA PUBLIC WKS1.85%$500.93K
11WISCONSIN ST HLTH & EDUCTNL FA1.85%$500.70K
12SAN JOSE CA EVERGREEN CMNTY CL1.85%$500.33K
13HOUSTON TX UTILITY SYS REVENUE1.85%$500.31K
14NEVADA ST HIGHWAY IMPT REVENUE1.57%$425.59K
15MASSACHUSETTS ST WTR RESOURCES1.56%$421.63K
16MICHIGAN ST FIN AUTH REVENUE1.48%$400.50K
17ILLINOIS ST FIN AUTH REVENUE1.39%$375.33K
18NEW JERSEY ST EDUCTNL FACS AUT1.37%$370.54K
19BRYAN CNTY GA SCH DIST1.30%$351.27K
20CALIFORNIA ST HLTH FACS FING A1.13%$306.21K
21HOUSTON TX INDEP SCH DIST1.11%$300.46K
22NEW JERSEY ST HLTH CARE FACS F1.11%$300.46K
23YUCAIPA VLY WTR DIST FING AUTH1.11%$300.04K
24EAST CNTY ADVANCED WTR PURIFIC1.02%$275.19K
25HONOLULU CITY & CNTY HI WSTWTR0.98%$265.59K

Top 25 of 158 holdings, as of May 31, 2026. Percentages are of the fund's net assets.

What the fund owns

F/m Ultrashort Tax-Free Municipal ETF holdings by asset type
Asset type% of fund
Bonds and other debt96.04%
Cash and short-term investments10.13%
F/m Ultrashort Tax-Free Municipal ETF holdings by country, largest 1
Country% of fund
United States106.17%

Shares of net assets from the fund's N-PORT report. Funds that borrow can add up to more than 100%, with borrowing (such as repurchase agreements) shown as a negative share.

Monthly total returns

Over the 3 months to May 31, 2026, F/m Ultrashort Tax-Free Municipal ETF's total return was +0.89%, as reported to the SEC.

F/m Ultrashort Tax-Free Municipal ETF monthly total returns
MonthTotal return
May 31, 2026+0.29%
Apr 30, 2026+0.30%
Mar 31, 2026+0.30%

The fund's own total returns as reported to the SEC (N-PORT), including reinvested distributions. Not the sample prices above.

Fund profile

Name
F/m Ultrashort Tax-Free Municipal ETF
Ticker
ZMUN
Exchange
NASDAQ
Fund type
ETF
Trust
RBB FUND, INC.
SEC series ID
S000091541
SEC CIK
0000831114
Fractional shares
No

Recent SEC filings

Shareholder reports and prospectuses are filed by RBB FUND, INC., the trust behind F/m Ultrashort Tax-Free Municipal ETF, and cover all of its funds.

Frequently asked questions

What is ZMUN's price?

F/m Ultrashort Tax-Free Municipal ETF (ZMUN) closed at $564.20 on Oct 9, 2026, up 1.26% from the previous close of $557.19.

What is ZMUN's expense ratio?

F/m Ultrashort Tax-Free Municipal ETF's expense ratio is 0.30%: $30.00 a year on $10,000 invested.

What does ZMUN hold?

F/m Ultrashort Tax-Free Municipal ETF held 158 investments worth $27.03M as of May 31, 2026. Its largest holding was BlackRock Liquidity Funds Muni, at 10.13% of the fund. Its five largest holdings were BlackRock Liquidity Funds Muni, SOUTH DAKOTA ST HLTH & EDUCTNL, NEW YORK ST DORM AUTH ST PERSO, UNIV OF KENTUCKY KY GEN RECPTS, GREAT LAKES MI WTR AUTH WTR SP.

How has ZMUN performed?

Over the 3 months to May 31, 2026, F/m Ultrashort Tax-Free Municipal ETF's total return was +0.89%, as reported to the SEC.

Sources and methodology

Holdings, net assets and monthly returns come from the fund's N-PORT filing with the SEC, as of May 31, 2026 (filed Jul 28, 2026). The expense ratio is from the fund's prospectus or shareholder report, as of Sep 30, 2025. Prices are generated sample data for development. Data sources and disclosures