Ribbon Communications
RBBN · NASDAQ
$1.41−$0.10 (−6.62%)TodayMarket closed ·
Prev close $1.51
Who owns RBBN
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 73.2% of RBBN’s shares.
- JPMorgan Private Bank (United States)29.5%
- Swarth Investments Inc15.6%
- Neuberger Berman, LLC10.4%
- BlackRock Institutional Trust Company, N.A.3.6%
- Next 6 largest institutions14.1%
- All other shareholders26.8%
| Holder | Shares | % of shares |
|---|---|---|
| JPMorgan Private Bank (United States) | 52.03M | 29.54% |
| Swarth Investments Inc | 27.44M | 15.58% |
| Neuberger Berman, LLC | 18.31M | 10.40% |
| BlackRock Institutional Trust Company, N.A. | 6.35M | 3.61% |
| Dimensional Fund Advisors, L.P. | 6.29M | 3.57% |
| Royce Investment Partners | 5.09M | 2.89% |
| Vanguard Capital Management, LLC | 3.93M | 2.23% |
| Vanguard Portfolio Management, LLC | 3.51M | 1.99% |
| Paradigm Capital Management, Inc. | 3.04M | 1.72% |
| McClelland (Bruce William) | 2.91M | 1.65% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Neuberger Intrinsic Value Fund | 4.18M | 2.37% |
| Vanguard Total Stock Market Index Fund | 2.80M | 1.59% |
| iShares Russell 2000 ETF | 2.43M | 1.38% |
| Vanguard Information Technology Index Fund | 2.40M | 1.37% |
| Neuberger US Small Cap Intrinsic Value Fund | 1.53M | 0.87% |
Insider trades
Form 4 filings by officers, directors and large holders
Insiders made no open-market buys or sales of RBBN in the last 6 months.
| Insider | Type | Shares | Value |
|---|---|---|---|
| SHANI SHAUL | Award | 11.75K | — |
| GRAYSON BRUNS H | Award | 14.42K | — |
| GRAYSON BRUNS H | Option exercise | 42.50K | — |
| GRAYSON BRUNS H | Option exercise | 42.50K | — |
| EWING R STEWART JR | Option exercise | 42.50K | — |
| EWING R STEWART JR | Option exercise | 42.50K | — |
| INFANTE BEATRIZ V | Option exercise | 42.50K | — |
| INFANTE BEATRIZ V | Option exercise | 42.50K | — |
| Macken Patrick W | Award | 65.00K | — |
| Macken Patrick W | Award | 97.50K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 5.01M
- Days to cover
- 4.02
- % of shares outstanding
- 2.85%
- Average daily volume
- 1.25M
- Change since last report
- −2.3%
Information on this page is provided for informational purposes only and is not a recommendation to buy, sell or hold any security. Investing involves risk, including possible loss of principal. Market data is delayed at least 15 minutes and is provided without warranty. Analyst ratings, price targets and company data come from third-party sources. Past performance does not guarantee future results.