RBBN Institutional Ownership & Shareholders
RIBBON COMMUNICATIONS INC (RBBN) is currently held by 157 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $296.91M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Jpmorgan Chase & Co is currently the largest disclosed institutional shareholder of RBBN tracked by InsiderSet, reporting ownership valued at approximately $115.54M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $80.67M, representing an estimated loss of -30.18% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 81% of the total disclosed RBBN value among the investors covered in this analysis. Major shareholders include Jpmorgan Chase & Co, Neuberger Berman Group Llc, Blackrock, Inc., and several other long-term asset managers with concentrated positions in RIBBON COMMUNICATIONS INC (RBBN).
This page ranks the largest institutional RBBN shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
157
Total Reported Value
$296.91M
Largest Holder
Jpmorgan Chase & Co
Largest Position
$115.54M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
85
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Jpmorgan Chase & Co | 0.01% | 52,042,936 | $115,535,317 | $80,666,551 | -$34,868,766 | -30.18% | |
| Neuberger Berman Group Llc | 0.03% | 17,431,102 | $46,032,220 | $27,018,208 | -$19,014,012 | -41.31% | |
| Blackrock, Inc. | 0.00% | 7,146,590 | $16,723,023 | $11,077,215 | -$5,645,809 | -33.76% | |
| Dimensional Fund Advisors Lp | 0.00% | 6,286,323 | $14,707,941 | $9,743,801 | -$4,964,140 | -33.75% | |
| Royce & Associates Lp | 0.10% | 5,090,927 | $11,912,769 | $7,890,937 | -$4,021,832 | -33.76% | |
| Vanguard Capital Management Llc | 0.00% | 3,925,626 | $9,185,965 | $6,084,720 | -$3,101,245 | -33.76% | |
| Vanguard Portfolio Management Llc | 0.00% | 3,513,067 | $8,220,577 | $5,445,254 | -$2,775,323 | -33.76% | |
| Paradigm Capital Management Inc/Ny | 0.19% | 3,036,398 | $7,105,171 | $4,706,417 | -$2,398,754 | -33.76% | |
| Geode Capital Management, Llc | 0.00% | 2,485,064 | $5,816,361 | $3,851,849 | -$1,964,512 | -33.78% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 2,213,134 | $5,178,733 | $3,430,358 | -$1,748,375 | -33.76% | |
| State Street Corp | 0.00% | 1,930,153 | $4,516,558 | $2,991,737 | -$1,524,821 | -33.76% | |
| D. E. Shaw & Co., Inc. | 0.00% | 1,790,375 | $4,189,477 | $2,775,081 | -$1,414,396 | -33.76% | |
| Acadian Asset Management Llc | 0.00% | 1,768,227 | $4,132,000 | $2,740,752 | -$1,391,248 | -33.67% | |
| Aqr Capital Management Llc | 0.00% | 1,409,795 | $3,298,921 | $2,185,182 | -$1,113,739 | -33.76% | |
| First Wilshire Securities Management Inc | 0.68% | 1,404,493 | $3,286,514 | $2,176,964 | -$1,109,550 | -33.76% | |
| Citadel Advisors Llc | 0.00% | 1,241,200 | $2,904,408 | $1,923,860 | -$980,548 | -33.76% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 1,215,230 | $2,843,638 | $1,883,607 | -$960,032 | -33.76% | |
| Marshall Wace, Llp | 0.00% | 814,132 | $1,905,067 | $1,261,905 | -$643,162 | -33.76% | |
| Charles Schwab Investment Management Inc | 0.00% | 800,159 | $1,872,372 | $1,240,246 | -$632,126 | -33.76% | |
| Northern Trust Corp | 0.00% | 749,823 | $1,754,585 | $1,162,226 | -$592,359 | -33.76% | |
| Millennium Management Llc | 0.00% | 698,458 | $1,634,392 | $1,082,610 | -$551,782 | -33.76% | |
| Vanguard Fiduciary Trust Co | 0.00% | 612,773 | $1,433,889 | $949,798 | -$484,091 | -33.76% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 582,093 | $1,362,098 | $902,244 | -$459,854 | -33.76% | |
| Victory Capital Management Inc | 0.00% | 456,421 | $1,068,025 | $707,453 | -$360,572 | -33.76% | |
| Goldman Sachs Group Inc | 0.00% | 415,430 | $972,106 | $643,917 | -$328,190 | -33.76% | |
| Russell Investments Group, Ltd. | 0.00% | 385,226 | $901,427 | $597,100 | -$304,327 | -33.76% | |
| Bank Of New York Mellon Corp | 0.00% | 379,800 | $888,731 | $588,690 | -$300,041 | -33.76% | |
| Morgan Stanley | 0.00% | 379,790 | $888,711 | $588,675 | -$300,037 | -33.76% | |
| Xtx Topco Ltd | 0.01% | 323,307 | $756,538 | $501,126 | -$255,412 | -33.76% | |
| Silverberg Bernstein Capital Management Llc | 0.34% | 412,223 | $725,512 | $638,946 | -$86,566 | -11.93% | |
| Bnp Paribas Asset Management Holding S.A. | 0.00% | 303,599 | $710,422 | $470,578 | -$239,844 | -33.76% | |
| Pacific Ridge Capital Partners, Llc | 0.12% | 286,213 | $669,738 | $443,630 | -$226,108 | -33.76% | |
| Commonwealth Equity Services, Llc | 0.00% | 284,723 | $666,250 | $441,321 | -$224,929 | -33.76% | |
| Voya Investment Management Llc | 0.00% | 214,879 | $502,817 | $333,062 | -$169,755 | -33.76% | |
| American Century Companies Inc | 0.00% | 211,076 | $493,918 | $327,168 | -$166,750 | -33.76% | |
| Squarepoint Ops Llc | 0.00% | 191,402 | $447,881 | $296,673 | -$151,208 | -33.76% | |
| Bank Of America Corp | 0.00% | 188,437 | $440,942 | $292,077 | -$148,865 | -33.76% | |
| Op Asset Management Ltd | 0.00% | 206,802 | $438,420 | $320,543 | -$117,877 | -26.89% | |
| Nuveen, Llc | 0.00% | 177,201 | $414,650 | $274,662 | -$139,988 | -33.76% | |
| Gsa Capital Partners Llp | 0.03% | 174,044 | $407,000 | $269,768 | -$137,232 | -33.72% | |
| Entrypoint Capital, Llc | 0.10% | 172,880 | $404,539 | $267,964 | -$136,575 | -33.76% | |
| Exoduspoint Capital Management, Lp | 0.00% | 172,615 | $403,919 | $267,553 | -$136,366 | -33.76% | |
| Ubs Group Ag | 0.00% | 165,372 | $386,970 | $256,327 | -$130,643 | -33.76% | |
| Invesco Ltd. | 0.00% | 162,669 | $380,646 | $252,137 | -$128,509 | -33.76% | |
| Winton Group Ltd | 0.01% | 149,404 | $349,605 | $231,576 | -$118,029 | -33.76% | |
| Qube Research & Technologies Ltd | 0.00% | 137,899 | $322,684 | $213,743 | -$108,941 | -33.76% | |
| Lsv Asset Management | 0.00% | 135,800 | $318,000 | $210,490 | -$107,510 | -33.81% | |
| Vanguard Global Advisers, Llc | 0.00% | 126,258 | $295,444 | $195,700 | -$99,744 | -33.76% | |
| Rhumbline Advisers | 0.00% | 126,186 | $295,269 | $195,588 | -$99,681 | -33.76% | |
| Alliancebernstein L.P. | 0.00% | 138,173 | $292,927 | $214,168 | -$78,759 | -26.89% |
Frequently asked questions about RBBN
Who are the largest institutional holders of RBBN?
The largest institutional holders of RBBN reported in the latest SEC Form 13F filings include Jpmorgan Chase & Co, Neuberger Berman Group Llc, Blackrock, Inc., Dimensional Fund Advisors Lp, and Royce & Associates Lp. InsiderSet ranks institutional holders by their latest reported RBBN position.
What is RBBN institutional ownership?
This page tracks RBBN positions reported by institutional investment managers through SEC Form 13F. RIBBON COMMUNICATIONS INC (RBBN) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own RBBN?
InsiderSet currently tracks 157 institutional managers reporting RBBN holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of RBBN shareholders.
How much RBBN stock do institutions own?
Institutional investment managers disclosed approximately $296.91M in RBBN holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was RBBN institutional ownership last updated?
The latest RBBN institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional RBBN holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its RBBN position after the reporting date.
Are institutions buying or selling RBBN?
Institutional buying and selling can be analyzed by comparing RBBN positions across consecutive 13F reporting periods. InsiderSet's RBBN Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View RBBN ownership changes.
How has RBBN institutional ownership changed over time?
InsiderSet tracks RBBN institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.