Who owns Nuveen Municipal High Income Opportunity Fund?
Institutional ownership of NMZ from SEC Form 13F filings across 132 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
132
13F holders
$227.6M
value, 2026 filers
18.8%
of shares outstanding (22.1M sh)
51
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of NMZ's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | MORGAN STANLEY | 3.2M | $33.5M | 0.0% | 2.7% | +18.8% |
| 2 | WELLS FARGO & COMPANY/MN | 2.4M | $24.9M | 0.0% | 2% | +168.5% |
| 3 | RAYMOND JAMES FINANCIAL INC | 1.9M | $20.4M | 0.0% | 1.6% | +72.3% |
| 4 | UBS Group AG | 1.5M | $16.2M | 0.0% | 1.3% | -20.2% |
| 5 | BANK OF AMERICA CORP /DE/ | 1.1M | $11.8M | 0.0% | 0.9% | +185.9% |
| 6 | LPL Financial LLC | 1.1M | $11.4M | 0.0% | 0.9% | +41.4% |
| 7 | VAN ECK ASSOCIATES CORP | 1.1M | $11.2M | 0.0% | 0.9% | +56.7% |
| 8 | J.W. COLE ADVISORS, INC.NEW | 1.0M | $10.8M | 0.2% | 0.9% | new |
| 9 | Cetera Investment Advisers | 1.0M | $10.6M | 0.0% | 0.9% | +152.1% |
| 10 | Rockefeller Capital Management L.P. | 592,054 | $6.3M | 0.0% | 0.5% | +351.2% |
| 11 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 516,095 | $5.5M | 0.0% | 0.4% | +51.5% |
| 12 | ROYAL BANK OF CANADA | 450,516 | $4.8M | 0.0% | 0.4% | +62.3% |
| 13 | COMMONWEALTH EQUITY SERVICES, LLC | 446,955 | $4.7M | 0.0% | 0.4% | +103.1% |
| 14 | OSAIC HOLDINGS, INC. | 311,793 | $3.3M | 0.0% | 0.3% | +40.5% |
| 15 | Cambridge Investment Research Advisors, Inc. | 286,680 | $3,030 | 0.0% | 0.2% | +249.8% |
| 16 | HighTower Advisors, LLCNEW | 265,084 | $2.8M | 0.0% | 0.2% | new |
| 17 | Janney Montgomery Scott LLC | 220,498 | $2,331 | 0.0% | 0.2% | +500.3% |
| 18 | Baird Financial Group, Inc. | 217,064 | $2.3M | 0.0% | 0.2% | +37.8% |
| 19 | Kestra Advisory Services, LLC | 189,986 | $2.0M | 0.0% | 0.2% | +10.7% |
| 20 | OneDigital Investment Advisors LLC | 187,628 | $2.0M | 0.0% | 0.2% | +0.6% |
| 21 | AE Wealth Management LLC | 172,917 | $1.8M | 0.0% | 0.1% | +8.9% |
| 22 | FIFTH THIRD BANCORP | 168,093 | $1.8M | 0.0% | 0.1% | +628.0% |
| 23 | NewEdge Advisors, LLC | 165,408 | $1.7M | 0.0% | 0.1% | +298.0% |
| 24 | STIFEL FINANCIAL CORP | 151,024 | $1.6M | 0.0% | 0.1% | -42.1% |
| 25 | HighPoint Advisor Group LLC | 148,159 | $1.6M | 0.1% | 0.1% | +18.3% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.