Nuveen Municipal High Income Opportunity Fund
US ˙ NYSE ˙ US6706821039

SecurityNMZ / Nuveen Municipal High Income Opportunity Fund
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership221,890 shares
Latest Disclosed Value $ 2,303,311
Advisor Group Holdings, Inc. reports 5.33% increase in ownership of NMZ / Nuveen Municipal High Income Opportunity Fund

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 221,890 shares of Nuveen Municipal High Income Opportunity Fund (US:NMZ) valued at $2,303,218 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 210,652 shares of Nuveen Municipal High Income Opportunity Fund. This represents a change in shares of 5.33% during the quarter. The current value of the position is $2,263,278 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 221,890 11,238 5.33 2,303 7.32 0.0020
2026-02-17 2025-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 210,652 -18,157 -7.94 2,147 -7.74 0.0031
2025-11-14 2025-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 228,809 35,689 18.48 2,326 16.18 0.0033
2025-09-04 2025-06-30 13F/A-1 NUVEEN MUN HIGH INCOME OPPOR COM 670682103 193,120 -43,122 -18.25 2,003 -22.31 0.0036
2025-08-13 2025-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 203,796 -32,446 2,203 0.0025
2025-05-12 2025-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 236,242 31,427 15.34 2,578 16.40 0.0057
2025-06-06 2024-12-31 13F/A-1 NUVEEN MUN HIGH INCOME OPPOR COM 670682103 204,815 77,564 60.95 2,214 49.29 0.0050
2025-02-07 2024-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 103,444 -23,807 1,205 0.0031
2024-11-13 2024-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 127,251 -21,341 -14.36 1,484 -7.49 0.0033
2024-08-13 2024-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 148,592 -317,739 -68.14 1,603 -67.45 0.0038
2024-05-10 2024-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 466,331 45,573 10.83 4,925 18.45 0.0110
2024-02-12 2023-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 420,758 -32,802 -7.23 4,157 -1.24 0.0073
2023-11-13 2023-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 453,560 -11,851 -2.55 4,209 -14.43 0.0062
2023-08-21 2023-06-30 13F/A-1 NUVEEN MUN HIGH INCOME OPPOR COM 670682103 465,411 32,145 7.42 4,919 5.13 0.0088
2023-08-10 2023-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 465,411 32,145 4,919 0.0013
2023-05-12 2023-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 433,266 35,423 8.90 4,679 13.79 0.0088
2023-02-10 2022-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 397,843 -25,064 -5.93 4,113 -5.41 0.0083
2022-11-14 2022-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 422,907 18,553 4.59 4,347 -8.10 0.0099
2022-08-10 2022-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 404,354 42,901 11.87 4,730 0.57 0.0104
2022-05-04 2022-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 361,453 11,217 3.20 4,703 -11.18 0.0091
2022-02-03 2021-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 350,236 -115 -0.03 5,295 2.42 0.0100
2021-11-05 2021-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 350,351 16,038 4.80 5,170 0.43 0.0108
2021-08-02 2021-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 334,313 20,911 6.67 5,148 13.84 0.0111
2021-05-13 2021-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 313,402 16,496 5.56 4,522 5.60 0.0109
2021-02-10 2020-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 296,906 28,661 10.68 4,282 18.29 0.0114
2020-11-12 2020-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 268,245 44,721 20.01 3,620 22.84 0.0108
2020-08-14 2020-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 223,524 26,034 13.18 2,947 19.80 0.0099
2020-05-18 2020-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 197,490 197,490 2,460 0.0101
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.