Which closed-end funds own Ribbon Communications Inc?
2 active closed-end funds report this security in their latest N-PORT filing, with a combined reported value of $2.7M. Security type: common equity. Country: United States. CUSIP 762544104 · ISIN US7625441040 · ticker RBBN.
Holdings are historical filings (report dates May 29, 2026 – Jun 30, 2026; N-PORT becomes public ~60 days after quarter end), not live positions. Weights are percent of each fund’s net assets. Different instruments of one issuer (shares, bonds, preferreds) are separate securities — see related securities below.
Funds holding this security
| Fund | Category | Weight | Value (USD) | Balance | Fund net assets | Prem/disc | Report date |
|---|---|---|---|---|---|---|---|
| RMT Royce Micro-Cap Trust | U.S. Equity | 0.29% | $2.7M | 1,172,279 sh | $938M | NAV unavailable | Jun 30, 2026 |
| GUG Guggenheim Active Allocation Fund | U.S. Equity | 0.00% | $1.3K | 419 sh | $631M | 14.1% discount | May 29, 2026 |
2 positions. Source: SEC Form N-PORT via market-data vendor re-serve. Funds without an N-PORT on file cannot appear here.
Also listed in filings as: Ribbon Communications Inc.
Issuer-level search for “RBBN” → · Compare two funds’ portfolios →