Nuveen Municipal High Income Opportunity Fund (NMZ) SEC filings and CIK.
NMZ’s SEC Central Index Key (CIK) is 0001266585, or 1266585 without leading zeros. The SEC’s ticker file lists it as NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND.
- Ticker
- NMZ
- CIK
- 0001266585
- Other tickers
- None
- Insider transactions, Q3 2026
- 16
Insider trading
In Q3 2026, insiders at Nuveen Municipal High Income Opportunity Fund reported 16 non-derivative transactions on 6 Forms 3, 4 and 5, including 8 open-market purchases and 8 sales. See every NMZ insider transaction →
Recent filings we observed
No filings for this CIK appear in our current observation window. The full history is available from the filings endpoint below and on SEC.gov.
Get NMZ SEC data through the API
curl "https://sec-api.dev/api/v1/filings?cik=1266585&limit=10" \
-H "Authorization: Bearer $SEC_API_KEY"curl "https://sec-api.dev/api/v1/companies/1266585" \
-H "Authorization: Bearer $SEC_API_KEY"curl "https://sec-api.dev/api/v1/facts/1266585?taxonomy=us-gaap&concept=Revenues&limit=10" \
-H "Authorization: Bearer $SEC_API_KEY"Ticker to CIK API · SEC filings API · Nuveen Municipal High Income Opportunity Fund on SEC.gov
Questions
What is NMZ’s CIK number?
NMZ’s SEC Central Index Key (CIK) is 0001266585, or 1266585 without leading zeros. The SEC’s ticker file lists it as NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND.
How do I find Nuveen Municipal High Income Opportunity Fund’s 10-K?
Request /api/v1/filings?cik=1266585&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.
Plain-text version for agents and LLMs: /companies/nmz.md
Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.