Nuveen Municipal High Income Opportunity Fund
US ˙ NYSE ˙ US6706821039

SecurityNMZ / Nuveen Municipal High Income Opportunity Fund
InstitutionRockefeller Capital Management L.P.
Latest Disclosed Ownership131,227 shares
Latest Disclosed Value $ 1,362,143
Rockefeller Capital Management L.P. reports 4.90% decrease in ownership of NMZ / Nuveen Municipal High Income Opportunity Fund

On May 14, 2026 - Rockefeller Capital Management L.P. filed a 13F-HR form disclosing ownership of 131,227 shares of Nuveen Municipal High Income Opportunity Fund (US:NMZ) valued at $1,362,136 USD as of March 31, 2026. The entity filed a previous 13F-HR/A on March 16, 2026 disclosing 137,991 shares of Nuveen Municipal High Income Opportunity Fund. This represents a change in shares of -4.90% during the quarter. The current value of the position is $1,338,515 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)
2026-05-14 2026-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 131,227 -6,764 -4.90 1,362 -3.13 0.0024
2026-03-16 2025-12-31 13F/A-1 NUVEEN MUN HIGH INCOME OPPOR COM 670682103 137,991 -10,841 -7.28 1,406 -10.79 0.0025
2026-02-14 2025-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 137,991 -10,841 1,406 0.0013
2025-11-14 2025-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 148,832 6,419 4.51 1,576 6.78 0.0031
2025-08-14 2025-06-30 13F/A-1 NUVEEN MUN HIGH INCOME OPPOR COM 670682103 142,413 -9,138 -6.03 1,477 -10.71 0.0032
2025-08-08 2025-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 142,413 -9,138 1,477 0.0019
2025-05-14 2025-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 151,551 -5,280 -3.37 1,653 -2.48 0.0041
2025-02-13 2024-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 156,831 -13,757 -8.06 1,695 -14.78 0.0044
2024-11-14 2024-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 170,588 -14,532 -7.85 1,989 -0.40 0.0054
2024-08-12 2024-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 185,120 7,442 4.19 1,997 6.45 0.0057
2024-05-14 2024-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 177,678 -7,881 -4.25 1,876 2.35 0.0055
2024-02-14 2023-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 185,559 18,432 11.03 1,833 18.26 0.0061
2023-11-14 2023-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 167,127 1,528 0.92 1,551 -11.43 0.0060
2023-08-14 2023-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 165,599 -5,962 -3.48 1,750 174,900.00 0.0068
2023-05-16 2023-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 171,561 105,886 161.23 2 -99.85 0.0080
2023-03-06 2022-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 65,675 32,400 97.37 679 98.54 0.0034
2022-11-02 2022-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 33,275 0 0.00 342 -12.08 0.0018
2022-08-12 2022-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 33,275 5,000 17.68 389 5.99 0.0021
2022-05-13 2022-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 28,275 -18,000 -38.90 367 -47.50 0.0018
2022-02-14 2021-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 46,275 0 0.00 699 2.34 0.0033
2021-11-12 2021-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 46,275 0 0.00 683 -4.07 0.0036
2021-08-10 2021-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 46,275 -1,260 -2.65 712 3.94 0.0040
2021-05-11 2021-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 47,535 2,035 4.47 685 4.42 0.0046
2021-02-12 2020-12-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 45,500 5,500 13.75 656 21.71 0.0050
2020-11-13 2020-09-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 40,000 0 0.00 539 2.08 0.0050
2020-08-12 2020-06-30 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 40,000 -252,246 -86.31 528 -85.49 0.0055
2020-05-12 2020-03-31 13F NUVEEN MUN HIGH INCOME OPPOR COM 670682103 292,246 260,246 813.27 3,638 701.32 0.0477
2020-02-07 2019-12-31 13F NUVEEN MUN HIGH INCOME OPP F COM 670682103 32,000 32,000 454 0.0057
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.