Ribbon Communications Inc (RBBN) Ownership
RBBN ownership summary
as of October 18, 2026- Institutions
- 73.4% of shares outstanding
- Insiders
- 18.84% of shares outstanding
- Shares outstanding
- 178.8M
- Float
- 92.5M shares available to trade
- Short interest
- 5.24% 5.0M shares short
- Days to cover
- 5.09 short interest down 2.3% vs prior month
- Institutions 73.37%
- Insiders 18.84%
- Other investors 7.80%
RBBN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | JPMorgan Chase & Co | 29.10% | 52.0M | $68.7M | −100 (−0.0%) | June 30, 2026 |
| 2 | Neuberger Berman Group LLC | 10.24% | 18.3M | $24.2M | +949,085 (+5.5%) | June 30, 2026 |
| 3 | BlackRock Inc | 4.00% | 7.1M | $9.4M | +422,583 (+6.3%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 3.52% | 6.3M | $8.3M | −64,787 (−1.0%) | June 30, 2026 |
| 5 | Royce & Associates, LP | 2.85% | 5.1M | $6.7M | +211,186 (+4.3%) | June 30, 2026 |
| 6 | Vanguard Capital Management, LLC | 2.20% | 3.9M | $5.2M | −290,833 (−6.9%) | June 30, 2026 |
| 7 | Vanguard Portfolio Management, LLC | 1.96% | 3.5M | $4.6M | +177,402 (+5.3%) | June 30, 2026 |
| 8 | Paradigm Capital Management, Inc. | 1.70% | 3.0M | $4.0M | −5.0M (−62.2%) | June 30, 2026 |
| 9 | Geode Capital Management, LLC | 1.39% | 2.5M | $3.3M | +70,504 (+2.9%) | June 30, 2026 |
| 10 | Connor Clark & Lunn Inv Mgmt Ltd | 1.24% | 2.2M | $2.9M | +123,412 (+5.9%) | June 30, 2026 |
| 11 | State Street Corp | 1.08% | 1.9M | $2.5M | +20,126 (+1.1%) | June 30, 2026 |
| 12 | D. E. Shaw & Co LP | 1.00% | 1.8M | $2.4M | +251,903 (+16.4%) | June 30, 2026 |
| 13 | Acadian Asset Management LLC | 0.99% | 1.8M | $2.3M | +329,737 (+22.9%) | June 30, 2026 |
| 14 | AQR Capital Management LLC | 0.79% | 1.4M | $1.9M | +152,448 (+12.1%) | June 30, 2026 |
| 15 | First Wilshire Securities Mgmt Inc (CA) | 0.79% | 1.4M | $1.9M | −2,685 (−0.2%) | June 30, 2026 |
| 16 | Citadel Advisors Llc | 0.69% | 1.2M | $1.6M | +666,211 (+115.9%) | June 30, 2026 |
| 17 | Arrowstreet Capital Limited Partnership | 0.68% | 1.2M | $1.6M | −1,646 (−0.1%) | June 30, 2026 |
| 18 | Marshall Wace Asset Management Ltd | 0.46% | 814K | $1.1M | +44,345 (+5.8%) | June 30, 2026 |
| 19 | Charles Schwab Investment Management Inc | 0.45% | 800K | $1.1M | +91,996 (+13.0%) | June 30, 2026 |
| 20 | Northern Trust Corp | 0.42% | 750K | $989,766 | +43,965 (+6.2%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 3.6M shares and 6 cut 5.4M.
RBBN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Neuberger Intrinsic Value I | 2.34% | 4.2M | $5.5M | — | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 1.57% | 2.8M | $3.7M | — | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 1.37% | 2.5M | $3.2M | −28,288 (−1.1%) | September 30, 2026 |
| 4 | Vanguard Information Technology ETF | 1.36% | 2.4M | $3.2M | +7,869 (+0.3%) | September 30, 2026 |
| 5 | Neuberger US Sm Cp Intrs Val USD I Acc | 0.94% | 1.7M | $2.2M | +147,770 (+9.7%) | June 30, 2026 |
| 6 | DFA US Small Cap Value I | 0.70% | 1.3M | $1.7M | — | August 31, 2026 |
| 7 | Royce Micro-Cap Trust | 0.65% | 1.2M | $1.5M | −44,821 (−3.7%) | September 30, 2026 |
| 8 | FTGF RY US SmCp Opp A USD Dis(A) | 0.61% | 1.1M | $1.4M | −333,045 (−23.4%) | August 31, 2026 |
| 9 | Fidelity Small Cap Index | 0.57% | 1.0M | $1.3M | −1,255 (−0.1%) | July 31, 2026 |
| 10 | Column Small Cap Select | 0.50% | 893K | $1.2M | — | September 30, 2026 |
| 11 | iShares Russell 2000 Value ETF | 0.50% | 892K | $1.2M | +1,354 (+0.2%) | September 30, 2026 |
| 12 | Royce Small-Cap Opportunity Invmt | 0.38% | 684K | $903,330 | −832,526 (−54.9%) | September 30, 2026 |
| 13 | DFA US Small Cap I | 0.35% | 628K | $828,736 | −149,388 (−19.2%) | August 31, 2026 |
| 14 | Dimensional US Small Cap Value ETF | 0.35% | 620K | $818,931 | — | September 24, 2026 |
| 15 | Vanguard Russell 2000 ETF | 0.31% | 548K | $722,728 | +9,822 (+1.8%) | September 30, 2026 |
| 16 | DFA US Micro Cap I | 0.30% | 537K | $709,330 | — | August 31, 2026 |
| 17 | Royce Micro-Cap Invmt | 0.28% | 502K | $662,111 | −34,696 (−6.5%) | September 30, 2026 |
| 18 | Schwab US Small-Cap ETF™ | 0.28% | 501K | $661,296 | +333 (+0.1%) | September 30, 2026 |
| 19 | Dimensional US Small Cap ETF | 0.27% | 490K | $646,766 | — | September 30, 2026 |
| 20 | Fidelity Extended Market Index | 0.26% | 473K | $624,491 | +21,253 (+4.7%) | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
RBBN insider transactions
latest 7| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-02-13 | Bruce William Mcclelland | Buy | $1.98 | 12,500 | $24,750 |
| 2026-02-11 | Bruce William Mcclelland | Buy | $1.99 | 12,500 | $24,875 |
| 2026-02-10 | Bruce William Mcclelland | Buy | $2.06 | 12,000 | $24,720 |
| 2025-09-08 | Dan Redington | Sell | $4.02 | 14,176 | $56,988 |
| 2025-09-05 | Beatriz V Infante | Sell | $3.98 | 8,690 | $34,586 |
| 2025-09-05 | Dan Redington | Sell | $4.03 | 155,434 | $626,399 |
| 2025-09-04 | Dan Redington | Sell | $4.16 | 20,000 | $83,200 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
RBBN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns RBBN
Institutional investors own 73.4% of Ribbon Communications's shares and insiders 18.84%. The largest holder is JPMorgan Chase & Co with 29.10% of the shares (52.0M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 5.24% of the float, or 5.09 days of average trading volume. The share count rose 262.1% since 2014.
Related: RBBN analyst forecast, RBBN key metrics. See the RBBN stock overview for the latest quote and news.
RBBN ownership FAQ
Who owns the most Ribbon Communications stock?
The largest shareholders of Ribbon Communications are JPMorgan Chase & Co (29.10%), Neuberger Berman Group LLC (10.24%), BlackRock Inc (4.00%), Dimensional Fund Advisors, Inc. (3.52%), Royce & Associates, LP (2.85%).
What percentage of Ribbon Communications is owned by institutions?
Institutions hold 73.4% of Ribbon Communications's shares outstanding; insiders hold 18.84%.
Which funds own Ribbon Communications?
The largest fund holders of Ribbon Communications are Neuberger Intrinsic Value I (2.34%), Vanguard MStar Total Stk Mkt Idx Invest (1.57%), iShares Russell 2000 ETF (1.37%), Vanguard Information Technology ETF (1.36%), Neuberger US Sm Cp Intrs Val USD I Acc (0.94%).
What is Ribbon Communications's short interest?
5.0M shares of Ribbon Communications were sold short, 5.24% of the float; at the average daily volume it would take 5.09 days to cover.
Are insiders buying or selling Ribbon Communications?
Of the latest 7 reported insider transactions in Ribbon Communications (since September 4, 2025), 3 were purchases and 4 were sales.
How many shares of Ribbon Communications are outstanding?
Ribbon Communications has 178.8M shares outstanding, of which 92.5M are in the public float.