RIBBON COMMUNICATIONS INC (RBBN) Institutional Shareholders
RIBBON COMMUNICATIONS INC (RBBN) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $289.28M in RBBN holdings during the latest filing period.
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 $86.91M, representing an estimated loss of -24.77% 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
155
Total Reported Value
$289.28M
Largest Holder
Jpmorgan Chase & Co
Largest Position
$115.54M
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
102
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 | $86,911,703 | -$28,623,614 | -24.77% | |
| Neuberger Berman Group Llc | 0.03% | 18,311,073 | $38,674,757 | $30,579,492 | -$8,095,265 | -20.93% | |
| Blackrock, Inc. | 0.00% | 7,146,590 | $16,723,023 | $11,934,805 | -$4,788,218 | -28.63% | |
| Dimensional Fund Advisors Lp | 0.00% | 6,286,323 | $14,707,941 | $10,498,159 | -$4,209,782 | -28.62% | |
| Royce & Associates Lp | 0.10% | 5,090,927 | $11,912,769 | $8,501,848 | -$3,410,921 | -28.63% | |
| Vanguard Capital Management Llc | 0.00% | 3,925,626 | $9,185,965 | $6,555,795 | -$2,630,170 | -28.63% | |
| Vanguard Portfolio Management Llc | 0.00% | 3,513,067 | $8,220,577 | $5,866,822 | -$2,353,755 | -28.63% | |
| Paradigm Capital Management Inc/Ny | 0.19% | 3,036,398 | $7,105,171 | $5,070,785 | -$2,034,386 | -28.63% | |
| Geode Capital Management, Llc | 0.00% | 2,485,064 | $5,816,361 | $4,150,057 | -$1,666,304 | -28.65% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.01% | 2,213,134 | $5,178,733 | $3,695,934 | -$1,482,799 | -28.63% | |
| State Street Corp | 0.00% | 1,930,153 | $4,516,558 | $3,223,356 | -$1,293,202 | -28.63% | |
| D. E. Shaw & Co., Inc. | 0.00% | 1,790,375 | $4,189,477 | $2,989,926 | -$1,199,551 | -28.63% | |
| Acadian Asset Management Llc | 0.00% | 1,768,227 | $4,132,000 | $2,952,939 | -$1,179,061 | -28.53% | |
| Aqr Capital Management Llc | 0.00% | 1,409,795 | $3,298,921 | $2,354,358 | -$944,563 | -28.63% | |
| First Wilshire Securities Management Inc | 0.68% | 1,404,493 | $3,286,514 | $2,345,503 | -$941,011 | -28.63% | |
| Citadel Advisors Llc | 0.00% | 1,241,200 | $2,904,408 | $2,072,804 | -$831,604 | -28.63% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 1,215,230 | $2,843,638 | $2,029,434 | -$814,204 | -28.63% | |
| Marshall Wace, Llp | 0.00% | 814,132 | $1,905,067 | $1,359,600 | -$545,467 | -28.63% | |
| Charles Schwab Investment Management Inc | 0.00% | 800,159 | $1,872,372 | $1,336,266 | -$536,106 | -28.63% | |
| Northern Trust Corp | 0.00% | 749,823 | $1,754,585 | $1,252,204 | -$502,381 | -28.63% | |
| Millennium Management Llc | 0.00% | 698,458 | $1,634,392 | $1,166,425 | -$467,967 | -28.63% | |
| Vanguard Fiduciary Trust Co | 0.00% | 612,773 | $1,433,889 | $1,023,331 | -$410,558 | -28.63% | |
| Jacobs Levy Equity Management, Inc | 0.00% | 582,093 | $1,362,098 | $972,095 | -$390,003 | -28.63% | |
| Victory Capital Management Inc | 0.00% | 456,421 | $1,068,025 | $762,223 | -$305,802 | -28.63% | |
| Silverberg Bernstein Capital Management Llc | 0.38% | 418,823 | $980,046 | $699,434 | -$280,612 | -28.63% | |
| Goldman Sachs Group Inc | 0.00% | 415,430 | $972,106 | $693,768 | -$278,338 | -28.63% | |
| Russell Investments Group, Ltd. | 0.00% | 385,226 | $901,427 | $643,327 | -$258,100 | -28.63% | |
| Bank Of New York Mellon Corp | 0.00% | 379,800 | $888,731 | $634,266 | -$254,465 | -28.63% | |
| Morgan Stanley | 0.00% | 379,790 | $888,711 | $634,249 | -$254,462 | -28.63% | |
| Xtx Topco Ltd | 0.01% | 323,307 | $756,538 | $539,923 | -$216,615 | -28.63% | |
| Bnp Paribas Asset Management Holding S.A. | 0.00% | 303,599 | $710,422 | $507,010 | -$203,412 | -28.63% | |
| Pacific Ridge Capital Partners, Llc | 0.12% | 286,213 | $669,738 | $477,976 | -$191,762 | -28.63% | |
| Commonwealth Equity Services, Llc | 0.00% | 284,723 | $666,250 | $475,487 | -$190,763 | -28.63% | |
| Voya Investment Management Llc | 0.00% | 214,879 | $502,817 | $358,848 | -$143,969 | -28.63% | |
| American Century Companies Inc | 0.00% | 211,076 | $493,918 | $352,497 | -$141,421 | -28.63% | |
| Squarepoint Ops Llc | 0.00% | 191,402 | $447,881 | $319,641 | -$128,240 | -28.63% | |
| Bank Of America Corp | 0.00% | 188,437 | $440,942 | $314,690 | -$126,252 | -28.63% | |
| Nuveen, Llc | 0.00% | 177,201 | $414,650 | $295,926 | -$118,724 | -28.63% | |
| Gsa Capital Partners Llp | 0.03% | 174,044 | $407,000 | $290,653 | -$116,347 | -28.59% | |
| Entrypoint Capital, Llc | 0.10% | 172,880 | $404,539 | $288,710 | -$115,829 | -28.63% | |
| Exoduspoint Capital Management, Lp | 0.00% | 172,615 | $403,919 | $288,267 | -$115,652 | -28.63% | |
| Ubs Group Ag | 0.00% | 165,372 | $386,970 | $276,171 | -$110,799 | -28.63% | |
| Invesco Ltd. | 0.00% | 162,669 | $380,646 | $271,657 | -$108,989 | -28.63% | |
| Winton Group Ltd | 0.01% | 149,404 | $349,605 | $249,505 | -$100,100 | -28.63% | |
| Qube Research & Technologies Ltd | 0.00% | 137,899 | $322,684 | $230,291 | -$92,393 | -28.63% | |
| Lsv Asset Management | 0.00% | 135,800 | $318,000 | $226,786 | -$91,214 | -28.68% | |
| Vanguard Global Advisers, Llc | 0.00% | 126,258 | $295,444 | $210,851 | -$84,593 | -28.63% | |
| Rhumbline Advisers | 0.00% | 126,186 | $295,269 | $210,731 | -$84,538 | -28.63% | |
| Alliancebernstein L.P. | 0.00% | 138,173 | $292,927 | $230,749 | -$62,178 | -21.23% | |
| Dynamic Technology Lab Private Ltd | 0.05% | 104,862 | $245,000 | $175,120 | -$69,880 | -28.52% |
Frequently asked questions about RBBN
Who owns the most RBBN stock?
The largest holders of RBBN are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for RIBBON COMMUNICATIONS INC (RBBN).
Is RBBN widely held by superinvestors?
Many widely followed stocks like RBBN appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly RBBN is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.