Nuveen Municipal High Income Opportunity Fund
US ˙ NYSE ˙ US6706821039

SecurityNMZ / Nuveen Municipal High Income Opportunity Fund
InstitutionAmeriprise Financial Inc
Latest Disclosed Ownership91,111 shares
Latest Disclosed Value $ 945,730
Ameriprise Financial Inc reports 6.78% decrease in ownership of NMZ / Nuveen Municipal High Income Opportunity Fund

On May 15, 2026 - Ameriprise Financial Inc filed a 13F-HR form disclosing ownership of 91,111 shares of Nuveen Municipal High Income Opportunity Fund (US:NMZ) valued at $945,732 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 97,742 shares of Nuveen Municipal High Income Opportunity Fund. This represents a change in shares of -6.78% during the quarter. The current value of the position is $932,977 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 MUNI HI INC OPPORT COM 670682103 91,111 -6,631 -6.78 946 -5.03 0.0000
2026-02-17 2025-12-31 13F NUVEEN MUNI HI INC OPPORT COM 670682103 97,742 20,542 26.61 996 21.79 0.0002
2025-11-14 2025-09-30 13F NUVEEN MUNI HI INC OPPORT COM 670682103 77,200 66 0.09 818 2.25 0.0002
2025-08-14 2025-06-30 13F NUVEEN MUNI HI INC OPPORT COM 670682103 77,134 3,612 4.91 800 -0.37 0.0002
2025-05-14 2025-03-31 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 73,522 19,451 35.97 802 37.33 0.0002
2025-02-14 2024-12-31 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 54,071 -6,591 -10.87 585 -17.40 0.0001
2024-11-14 2024-09-30 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 60,662 -6,444 -9.60 707 -2.35 0.0002
2024-08-14 2024-06-30 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 67,106 -1,015 -1.49 724 0.70 0.0002
2024-05-15 2024-03-31 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 68,121 -24,875 -26.75 719 -21.68 0.0002
2024-02-14 2023-12-31 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 92,996 -10,502 -10.15 919 -4.37 0.0003
2023-11-14 2023-09-30 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 103,498 -26,786 -20.56 960 -30.28 0.0003
2023-08-14 2023-06-30 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 130,284 -5,117 -3.78 1,377 -5.81 0.0004
2023-05-22 2023-03-31 13F/A-1 NUVEEN MUNI HIGH INC OPPORT COM 670682103 135,401 -11,399 -7.76 1,462 -3.69 0.0005
2023-05-15 2023-03-31 13F NUVEEN SENIOR INCOME FUND COM 670682103 135,401 -11,399 1,462 0.0001
2023-02-14 2022-12-31 13F NUVEEN MUNI HIGH INC OPPORT COM 670682103 146,800 -15,270 -9.42 1,518 -8.88 0.0005
2022-11-14 2022-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 162,070 -408,181 -71.58 1,666 -75.03 0.0006
2022-08-15 2022-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 570,251 -279,061 -32.86 6,671 -38.48 0.0023
2022-05-16 2022-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 849,312 734,996 642.95 10,844 527.55 0.0032
2022-02-14 2021-12-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 114,316 11,658 11.36 1,728 14.06 0.0005
2021-11-15 2021-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 102,658 12,154 13.43 1,515 8.76 0.0005
2021-08-16 2021-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 90,504 -9,708 -9.69 1,393 -3.67 0.0004
2021-05-17 2021-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 100,212 8,379 9.12 1,446 9.21 0.0005
2021-02-12 2020-12-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 91,833 12,746 16.12 1,324 23.51 0.0005
2020-11-16 2020-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 79,087 6,411 8.82 1,072 11.78 0.0004
2020-08-14 2020-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 72,676 6,179 9.29 959 15.82 0.0004
2020-05-15 2020-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 66,497 -28,628 -30.10 828 -38.67 0.0004
2020-02-14 2019-12-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 95,125 25,144 35.93 1,350 35.14 0.0006
2019-11-14 2019-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 69,981 9,255 15.24 999 17.81 0.0004
2019-08-14 2019-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 60,726 -3,765 -5.84 848 -2.86 0.0004
2019-05-15 2019-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 64,491 -6,448 -9.09 873 5.69 0.0004
2019-02-14 2018-12-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 70,939 -6,723 -8.66 826 -15.28 0.0004
2018-11-14 2018-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 77,662 -3,836 -4.71 975 -5.61 0.0003
2018-08-14 2018-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 81,498 -1,616 -1.94 1,033 -0.58 0.0005
2018-05-14 2018-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 83,114 -8,137 -8.92 1,039 -16.34 0.0005
2018-02-12 2017-12-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 91,251 5,682 6.64 1,242 5.61 0.0006
2017-11-07 2017-09-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 85,569 -288 -0.34 1,176 2.17 0.0006
2017-08-10 2017-06-30 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 85,857 5,657 7.05 1,151 9.10 0.0006
2017-05-05 2017-03-31 13F NUVEEN MUNI HIGH INC OPP FD COM 670682103 80,200 60,895 315.44 1,055 368.89 0.0005
2013-11-14 2013-09-30 13F NUVEEN MUNICIPAL HIGH COM 670682103 19,305 2,145 12.50 225 3.21 0.0001
2013-08-14 2013-06-30 13F NUVEEN MUNICIPAL HIGH COM 670682103 17,160 17,160 218 0.0002
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.