# Nuveen Municipal High Income Opportunity Fund: overview

NMZ · NYSE · CIK 1266585 · [Other](/sectors/other.md)

Pages: [Overview](/companies/nmz.md) · [Financials](/companies/nmz/financials.md) · [Filings](/companies/nmz/filings.md) · [Insiders](/companies/nmz/insiders.md)

Financial statements for this company are not loaded yet.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/nmz/insiders.md)

| Date | Insider | Role | Transaction | Shares | Reported price | Value | Filing |
| --- | --- | --- | --- | ---: | ---: | ---: | --- |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 1 | $10.2301 | $10.23 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 1 | $10.3237 | $10.32 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 1 | $10.2412 | $10.24 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 1 | $10.175 | $10.18 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 1 | $10.185 | $10.19 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-04 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 1 | $10.1887 | $10.19 | [Form 4](/filings/0000070858-26-000411.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 10 | $10.2301 | $102.30 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 14 | $10.2412 | $143.38 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 7 | $10.3237 | $72.27 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 5 | $10.22 | $51.10 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 10 | $10.2143 | $102.14 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 14 | $10.2143 | $143.00 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-08-03 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 7 | $10.195 | $71.37 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-07-31 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 5 | $10.325 | $51.63 | [Form 4](/filings/0000070858-26-000409.md) |
| 2026-07-24 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 9 | $10.175 | $91.58 | [Form 4](/filings/0000070858-26-000368.md) |
| 2026-07-24 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 9 | $10.235 | $92.11 | [Form 4](/filings/0000070858-26-000368.md) |
| 2025-12-19 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 1,000 | $10.54 | $10.5k | [Form 4](/filings/0000070858-25-000487.md) |
| 2025-12-19 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 1,000 | $10.3191 | $10.3k | [Form 4](/filings/0000070858-25-000487.md) |
| 2025-10-10 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Sale (S) | 6,440 | $10.635 | $68.5k | [Form 4](/filings/0000070858-25-000384.md) |
| 2025-10-10 | [Bank of America Corp](/insiders/70858.md) | 10% owner | Purchase (P) | 6,440 | $10.56 | $68.0k | [Form 4](/filings/0000070858-25-000384.md) |

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [MORGAN STANLEY](/funds/895421.md) | 2026-06-30 | $33.5m | 3,168,046 |  | Added +502,314 |
| [GUGGENHEIM CAPITAL LLC](/funds/1283072.md) | 2026-06-30 | $25.1m | 2,376,749 |  | Added +333,311 |
| [WELLS FARGO & COMPANY/MN](/funds/72971.md) | 2026-06-30 | $24.9m | 2,359,288 |  | Added +1,480,618 |
| [Hennion & Walsh Asset Management, Inc.](/funds/1861642.md) | 2026-06-30 | $23.4m | 2,217,036 |  | Added +577,934 |
| [RAYMOND JAMES FINANCIAL INC](/funds/720005.md) | 2026-06-30 | $20.4m | 1,930,236 |  | Added +810,274 |
| [UBS Group AG](/funds/1610520.md) | 2026-06-30 | $16.2m | 1,531,663 |  | Reduced −388,040 |
| [BANK OF AMERICA CORP /DE/](/funds/70858.md) | 2026-06-30 | $11.8m | 1,112,841 |  | Added +723,642 |
| [LPL Financial LLC](/funds/1403438.md) | 2026-06-30 | $11.4m | 1,080,405 |  | Added +316,334 |
| [VAN ECK ASSOCIATES CORP](/funds/869178.md) | 2026-06-30 | $11.2m | 1,056,439 |  | Added +382,155 |
| [RIVERNORTH CAPITAL MANAGEMENT, LLC](/funds/1447578.md) | 2026-06-30 | $11.1m | 1,049,891 |  | New +1,049,891 |

## Recent filings

[All 409 filings](/companies/nmz/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-07-02 | 01:19 ET | [DEF 14A](/filings/0001193125-26-293122.md) | Proxy statement, period 2026-08-13 | 0001193125-26-293122 |
| 2025-06-30 | 20:29 ET | [DEF 14A](/filings/0001193125-25-152769.md) | Proxy statement, period 2025-08-14 | 0001193125-25-152769 |
| 2024-06-27 | 21:27 ET | [DEF 14A](/filings/0001193125-24-170731.md) | Proxy statement, period 2024-08-08 | 0001193125-24-170731 |
| 2024-03-06 | 20:15 ET | [8-K](/filings/0001193125-24-060622.md) | 7.01 Regulation FD disclosure; 9.01 Financial statements and exhibits | 0001193125-24-060622 |
| 2023-10-13 | 11:37 ET | [8-K](/filings/0001193125-23-255708.md) | 5.02 Departure or appointment of officers or directors | 0001193125-23-255708 |
| 2023-06-30 | 20:55 ET | [DEF 14A](/filings/0001193125-23-180540.md) | Proxy statement, period 2023-08-09 | 0001193125-23-180540 |
| 2023-04-26 | 20:12 ET | [SC 13D/A](/filings/0001193125-23-118529.md) | Ownership report, active investor, amended | 0001193125-23-118529 |
| 2023-04-05 | 20:31 ET | [SC 13D/A](/filings/0001193125-23-092341.md) | Ownership report, active investor, amended | 0001193125-23-092341 |
| 2022-06-28 | 20:33 ET | [DEF 14A](/filings/0001193125-22-183966.md) | Proxy statement, period 2022-08-05 | 0001193125-22-183966 |
| 2022-06-13 | 19:50 ET | [SC 13D/A](/filings/0001193125-22-172872.md) | Ownership report, active investor, amended | 0001193125-22-172872 |

## Latest annual report

No annual report is in coverage.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 1266585
- Tickers: NMZ
- Exchange: NYSE
- SIC code: not reported
- State of incorporation: MA
- Filer category: not reported

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 24, 2026, 15:51 ET. No prices; not investment advice.