Who owns Nuveen Municipal High Income Opportunity Fund?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of NMZ from SEC Form 13F filings across 212 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.
As of the 2026-06-30 reporting period, 212 institutions disclosed 33.9M shares of Nuveen Municipal High Income Opportunity Fund worth $358.5M — about 15.7% of shares outstanding; the largest disclosed holder is MORGAN STANLEY. Source: SEC Form 13F filings, parsed by EvidInvest.
212
13F holders
$358.5M
value, 2026 filers
15.7%
of shares outstanding (33.9M sh)
90
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% | 1.5% | +18.8% |
| 2 | GUGGENHEIM CAPITAL LLC | 2.4M | $25.1M | 0.2% | 1.1% | +16.3% |
| 3 | WELLS FARGO & COMPANY/MN | 2.4M | $24.9M | 0.0% | 1.1% | +168.5% |
| 4 | SIT INVESTMENT ASSOCIATES INCNEW | 2.3M | $24.7M | 0.5% | 1.1% | new |
| 5 | Hennion & Walsh Asset Management, Inc. | 2.2M | $23.4M | 0.7% | 1% | +35.3% |
| 6 | RAYMOND JAMES FINANCIAL INC | 1.9M | $20.4M | 0.0% | 0.9% | +72.3% |
| 7 | UBS Group AG | 1.5M | $16.2M | 0.0% | 0.7% | -20.2% |
| 8 | BANK OF AMERICA CORP /DE/ | 1.1M | $11.8M | 0.0% | 0.5% | +185.9% |
| 9 | LPL Financial LLC | 1.1M | $11.4M | 0.0% | 0.5% | +41.4% |
| 10 | VAN ECK ASSOCIATES CORP | 1.1M | $11.2M | 0.0% | 0.5% | +56.7% |
| 11 | RIVERNORTH CAPITAL MANAGEMENT, LLCNEW | 1.0M | $11.1M | 0.5% | 0.5% | new |
| 12 | J.W. COLE ADVISORS, INC.NEW | 1.0M | $10.8M | 0.2% | 0.5% | new |
| 13 | Cetera Investment Advisers | 1.0M | $10.6M | 0.0% | 0.5% | +152.1% |
| 14 | Melone Private Wealth, LLC | 846,287 | $8.9M | 3.4% | 0.4% | +25.8% |
| 15 | Rockefeller Capital Management L.P. | 592,054 | $6.3M | 0.0% | 0.3% | +351.2% |
| 16 | NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO | 516,095 | $5.5M | 0.0% | 0.2% | +51.5% |
| 17 | ROYAL BANK OF CANADA | 450,516 | $4.8M | 0.0% | 0.2% | +62.3% |
| 18 | COMMONWEALTH EQUITY SERVICES, LLC | 446,955 | $4.7M | 0.0% | 0.2% | +103.1% |
| 19 | OSAIC HOLDINGS, INC. | 311,793 | $3.3M | 0.0% | 0.1% | +40.5% |
| 20 | Advisors Asset Management, Inc. | 271,945 | $2.9M | 0.0% | 0.1% | +3.6% |
| 21 | HighTower Advisors, LLCNEW | 265,084 | $2.8M | 0.0% | 0.1% | new |
| 22 | Janney Montgomery Scott LLC | 220,498 | $2.3M | 0.0% | 0.1% | +500.3% |
| 23 | Baird Financial Group, Inc. | 217,064 | $2.3M | 0.0% | 0.1% | +37.8% |
| 24 | Platform Technology Partners | 193,277 | $2.0M | 0.3% | 0.1% | +11.6% |
| 25 | Kestra Advisory Services, LLC | 189,986 | $2.0M | 0.0% | 0.1% | +10.7% |
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.