Ribbon Communications Inc. (RBBN) — Institutional Holders, Q2 2026
161 institutional investment managers reported a RBBN position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $289.7M. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
RBBN in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
- Neuberger Berman GroupAdded · +949,085 sh+$2.2M
- CITADEL ADVISORSAdded · +666,211 sh+$1.6M
- BlackRockAdded · +422,583 sh+$988.8K
- ACADIAN ASSET MANAGEMENTAdded · +329,737 sh+$771.6K
- BNP Paribas Asset Management Holding S.A.New · +303,599 sh+$710.4K
Biggest sellers
- PARADIGM CAPITAL MANAGEMENTTrimmed · -4,999,937 sh-$11.7M
- GOLDMAN SACHS GROUPTrimmed · -329,315 sh-$770.6K
- VANGUARD CAPITAL MANAGEMENTTrimmed · -290,833 sh-$680.5K
- OP Asset Management LtdSold out · -206,802 sh-$483.9K
- Engineers Gate ManagerSold out · -139,962 sh-$327.5K
RBBN 13F holders ranked 1–100 of 161
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | JPMORGAN CHASE#1 · 52,042,936 sh | 52,042,936 | $115.5M | <0.01% | 0.0% |
| 2 | Neuberger Berman Group#2 · 18,311,073 sh | 18,311,073 | $38.7M | 0.03% | +5.5% |
| 3 | BlackRock#3 · 7,146,590 sh | 7,146,590 | $16.7M | <0.01% | +6.3% |
| 4 | DIMENSIONAL FUND ADVISORS#4 · 6,286,323 sh | 6,286,323 | $14.7M | <0.01% | -1.0% |
| 5 | ROYCE & ASSOCIATES#5 · 5,090,927 sh | 5,090,927 | $11.9M | 0.10% | +4.3% |
| 6 | VANGUARD CAPITAL MANAGEMENT#6 · 3,925,626 sh | 3,925,626 | $9.2M | <0.01% | -6.9% |
| 7 | VANGUARD PORTFOLIO MANAGEMENT#7 · 3,513,067 sh | 3,513,067 | $8.2M | <0.01% | +5.3% |
| 8 | PARADIGM CAPITAL MANAGEMENT#8 · 3,036,398 sh | 3,036,398 | $7.1M | 0.19% | -62.2% |
| 9 | GEODE CAPITAL MANAGEMENT#9 · 2,485,064 sh | 2,485,064 | $5.8M | <0.01% | +2.9% |
| 10 | Connor, Clark & Lunn Investment Management Ltd.#10 · 2,213,134 sh | 2,213,134 | $5.2M | <0.01% | +5.9% |
| 11 | STATE STREET#11 · 1,930,153 sh | 1,930,153 | $4.5M | <0.01% | +1.1% |
| 12 | D. E. Shaw#12 · 1,790,375 sh | 1,790,375 | $4.2M | <0.01% | +16.4% |
| 13 | ACADIAN ASSET MANAGEMENT#13 · 1,768,227 sh | 1,768,227 | $4.1M | <0.01% | +22.9% |
| 14 | AQR CAPITAL MANAGEMENT#14 · 1,409,795 sh | 1,409,795 | $3.3M | <0.01% | +12.1% |
| 15 | FIRST WILSHIRE SECURITIES MANAGEMENT#15 · 1,404,493 sh | 1,404,493 | $3.3M | 0.68% | -0.2% |
| 16 | CITADEL ADVISORS#16 · 1,241,200 sh | 1,241,200 | $2.9M | <0.01% | +115.9% |
| 17 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP#17 · 1,215,230 sh | 1,215,230 | $2.8M | <0.01% | -0.1% |
| 18 | MARSHALL WACE, LLP#18 · 814,132 sh | 814,132 | $1.9M | <0.01% | +5.8% |
| 19 | CHARLES SCHWAB INVESTMENT MANAGEMENT#19 · 800,159 sh | 800,159 | $1.9M | <0.01% | +13.0% |
| 20 | NORTHERN#20 · 749,823 sh | 749,823 | $1.8M | <0.01% | +6.2% |
| 21 | MILLENNIUM MANAGEMENT#21 · 698,458 sh | 698,458 | $1.6M | <0.01% | +42.2% |
| 22 | VANGUARD FIDUCIARY#22 · 612,773 sh | 612,773 | $1.4M | <0.01% | +4.3% |
| 23 | JACOBS LEVY EQUITY MANAGEMENT#23 · 582,093 sh | 582,093 | $1.4M | <0.01% | -15.1% |
| 24 | VICTORY CAPITAL MANAGEMENT#24 · 456,421 sh | 456,421 | $1.1M | <0.01% | +8.1% |
| 25 | Silverberg Bernstein Capital Management#25 · 418,823 sh | 418,823 | $980.0K | — | -4.4% |
| 26 | GOLDMAN SACHS GROUP#26 · 415,430 sh | 415,430 | $972.1K | <0.01% | -44.2% |
| 27 | Russell Investments Group, Ltd.#27 · 385,226 sh | 385,226 | $901.4K | <0.01% | +9.5% |
| 28 | Bank of New York Mellon#28 · 379,800 sh | 379,800 | $888.7K | <0.01% | +0.6% |
| 29 | MORGAN STANLEY#29 · 379,790 sh | 379,790 | $888.7K | 0.00% | -10.3% |
| 30 | XTX Topco Ltd#30 · 323,307 sh | 323,307 | $756.5K | <0.01% | +100.9% |
| 31 | BNP Paribas Asset Management Holding S.A.#31 · 303,599 sh | 303,599 | $710.4K | <0.01% | New |
| 32 | Pacific Ridge Capital Partners#32 · 286,213 sh | 286,213 | $669.7K | 0.12% | +16.3% |
| 33 | COMMONWEALTH EQUITY SERVICES#33 · 284,723 sh | 284,723 | $666.3K | <0.01% | 0.0% |
| 34 | VOYA INVESTMENT MANAGEMENT#34 · 214,879 sh | 214,879 | $502.8K | <0.01% | +3.5% |
| 35 | AMERICAN CENTURY COMPANIES#35 · 211,076 sh | 211,076 | $493.9K | <0.01% | -0.6% |
| 36 | Squarepoint Ops#36 · 191,402 sh | 191,402 | $447.9K | <0.01% | New |
| 37 | BANK OF AMERICA#37 · 188,437 sh | 188,437 | $440.9K | 0.00% | -9.5% |
| 38 | Nuveen#38 · 177,201 sh | 177,201 | $414.6K | <0.01% | 0.0% |
| 39 | GSA CAPITAL PARTNERS LLP#39 · 174,044 sh | 174,044 | $407.0K | 0.03% | -40.5% |
| 40 | EntryPoint Capital#40 · 172,880 sh | 172,880 | $404.5K | 0.10% | +23.2% |
| 41 | ExodusPoint Capital Management#41 · 172,615 sh | 172,615 | $403.9K | <0.01% | -12.3% |
| 42 | UBS Group AG#42 · 165,372 sh | 165,372 | $387.0K | 0.00% | -14.2% |
| 43 | Invesco Ltd.#43 · 162,669 sh | 162,669 | $380.6K | 0.00% | -10.5% |
| 44 | WINTON GROUP Ltd#44 · 149,404 sh | 149,404 | $349.6K | 0.01% | +198.1% |
| 45 | Qube Research & Technologies Ltd#45 · 137,899 sh | 137,899 | $322.7K | <0.01% | New |
| 46 | LSV ASSET MANAGEMENT#46 · 135,800 sh | 135,800 | $318.0K | <0.01% | 0.0% |
| 47 | Vanguard Global Advisers#47 · 126,258 sh | 126,258 | $295.4K | <0.01% | 0.0% |
| 48 | RHUMBLINE ADVISERS#48 · 126,186 sh | 126,186 | $295.3K | <0.01% | -1.7% |
| 49 | ALLIANCEBERNSTEIN L.P.#49 · 138,173 sh | 138,173 | $292.9K | <0.01% | +15.0% |
| 50 | Dynamic Technology Lab Private Ltd#50 · 104,862 sh | 104,862 | $245.0K | 0.05% | +76.3% |
| 51 | AMERIPRISE FINANCIAL#51 · 103,387 sh | 103,387 | $241.9K | 0.00% | -3.8% |
| 52 | TWO SIGMA INVESTMENTS#52 · 102,187 sh | 102,187 | $239.1K | <0.01% | New |
| 53 | Creative Planning#53 · 100,626 sh | 100,626 | $235.5K | <0.01% | +55.1% |
| 54 | BARCLAYS PLC#54 · 94,499 sh | 94,499 | $221.1K | 0.00% | -7.2% |
| 55 | BRIDGEWAY CAPITAL MANAGEMENT#55 · 94,418 sh | 94,418 | $220.9K | <0.01% | +7.0% |
| 56 | Empowered Funds#56 · 94,418 sh | 94,418 | $220.9K | <0.01% | +7.0% |
| 57 | FRANKLIN RESOURCES#57 · 92,548 sh | 92,548 | $216.6K | 0.00% | -14.9% |
| 58 | Hillsdale Investment Management#58 · 91,013 sh | 91,013 | $213.0K | <0.01% | New |
| 59 | CITIGROUP#59 · 87,907 sh | 87,907 | $205.7K | <0.01% | +140.4% |
| 60 | PRICE T ROWE ASSOCIATES#60 · 85,744 sh | 85,744 | $201.0K | 0.00% | +22.8% |
| 61 | PRUDENTIAL FINANCIAL#61 · 82,938 sh | 82,938 | $194.1K | <0.01% | +466.6% |
| 62 | DEUTSCHE BANK AG\#62 · 81,935 sh | 81,935 | $191.7K | <0.01% | +222.8% |
| 63 | WELLS FARGO & COMPANY#63 · 81,508 sh | 81,508 | $190.7K | 0.00% | +117.7% |
| 64 | SEI INVESTMENTS#64 · 78,348 sh | 78,348 | $183.3K | <0.01% | -4.1% |
| 65 | SIMPLEX TRADING#65 · 73,875 sh | 73,875 | $172.9K | <0.01% | New |
| 66 | HighMark Wealth Management#66 · 69,000 sh | 69,000 | $161.5K | 0.05% | New |
| 67 | PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO#67 · 60,645 sh | 60,645 | $141.9K | <0.01% | 0.0% |
| 68 | Virtu Financial#68 · 57,900 sh | 57,900 | $135.0K | <0.01% | +125.2% |
| 69 | MetLife Investment Management#69 · 53,013 sh | 53,013 | $124.0K | <0.01% | +34.3% |
| 70 | PRELUDE CAPITAL MANAGEMENT#70 · 52,138 sh | 52,138 | $122.0K | <0.01% | +6.3% |
| 71 | Vident Advisory#71 · 50,192 sh | 50,192 | $117.4K | <0.01% | 0.0% |
| 72 | SUSQUEHANNA INTERNATIONAL GROUP, LLP#72 · 47,175 sh | 47,175 | $110.4K | 0.00% | -9.7% |
| 73 | SUSQUEHANNA FUNDAMENTAL INVESTMENTS#73 · 46,661 sh | 46,661 | $109.2K | <0.01% | -14.4% |
| 74 | Mariner#74 · 43,328 sh | 43,328 | $101.3K | <0.01% | +87.6% |
| 75 | MIRAE ASSET GLOBAL ETFS Ltd.#75 · 43,168 sh | 43,168 | $101.0K | <0.01% | -3.3% |
| 76 | Assenagon Asset Management S.A.#76 · 37,927 sh | 37,927 | $88.7K | — | 0.0% |
| 77 | STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM#77 · 37,543 sh | 37,543 | $87.9K | <0.01% | 0.0% |
| 78 | SG Americas Securities#78 · 34,798 sh | 34,798 | $81.0K | 0.00% | +8.2% |
| 79 | Focus Partners Wealth#79 · 32,726 sh | 32,726 | $76.6K | <0.01% | +4.2% |
| 80 | Polymer Capital Management (US)#80 · 28,355 sh | 28,355 | $66.4K | <0.01% | -11.0% |
| 81 | ENVESTNET ASSET MANAGEMENT#81 · 27,693 sh | 27,693 | $64.8K | 0.00% | +4.6% |
| 82 | HSBC PLC#82 · 26,991 sh | 26,991 | $62.5K | 0.00% | New |
| 83 | Brevan Howard Capital Management#83 · 26,154 sh | 26,154 | $61.2K | <0.01% | New |
| 84 | Abacus Wealth Partners#84 · 26,091 sh | 26,091 | $61.1K | <0.01% | 0.0% |
| 85 | MANUFACTURERS LIFE INSURANCE COMPANY, THE#85 · 25,567 sh | 25,567 | $59.8K | 0.00% | -7.7% |
| 86 | State of Alaska, Department of Revenue#86 · 25,390 sh | 25,390 | $59.0K | — | 0.0% |
| 87 | Essex Financial Services#87 · 24,810 sh | 24,810 | $58.1K | <0.01% | +0.6% |
| 88 | Police & Firemen's Retirement System of New Jersey#88 · 24,692 sh | 24,692 | $57.8K | <0.01% | 0.0% |
| 89 | Susquehanna Portfolio Strategies#89 · 24,339 sh | 24,339 | $57.0K | <0.01% | -73.9% |
| 90 | Global Retirement Partners#90 · 24,301 sh | 24,301 | $56.9K | <0.01% | — |
| 91 | NEW YORK STATE COMMON RETIREMENT FUND#91 · 22,549 sh | 22,549 | $52.8K | <0.01% | 0.0% |
| 92 | MACKENZIE FINANCIAL#92 · 22,362 sh | 22,362 | $52.3K | <0.01% | New |
| 93 | JANE STREET GROUP#93 · 21,881 sh | 21,881 | $51.2K | 0.00% | New |
| 94 | JONES FINANCIAL COMPANIES LLLP#94 · 22,484 sh | 22,484 | $49.5K | 0.00% | +17.6% |
| 95 | INTECH INVESTMENT MANAGEMENT#95 · 20,740 sh | 20,740 | $48.5K | <0.01% | -5.5% |
| 96 | IEQ CAPITAL#96 · 20,436 sh | 20,436 | $47.8K | <0.01% | +44.6% |
| 97 | VISTA INVESTMENT PARTNERS#97 · 20,400 sh | 20,400 | $47.7K | — | 0.0% |
| 98 | WEALTH ENHANCEMENT ADVISORY SERVICES#98 · 20,262 sh | 20,262 | $47.0K | — | +49.5% |
| 99 | LPL Financial#99 · 18,294 sh | 18,294 | $42.8K | 0.00% | +17.3% |
| 100 | IRONWOOD INVESTMENT MANAGEMENT#100 · 18,030 sh | 18,030 | $42.2K | 0.01% | -0.2% |
Funds that sold out of RBBN in Q2 2026 (12)
Held RBBN at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| OP Asset Management Ltd206,802 sh | 206,802 | $438.4K |
| Engineers Gate Manager139,962 sh | 139,962 | $296.7K |
| Herald Investment Management Ltd100,000 sh | 100,000 | $212.0K |
| State of Wyoming54,933 sh | 54,933 | $116.5K |
| Schonfeld Strategic Advisors21,784 sh | 21,784 | $46.2K |
| SEVEN MILE ADVISORY15,976 sh | 15,976 | $33.9K |
| NINE MASTS CAPITAL Ltd14,377 sh | 14,377 | $30.5K |
| Y-Intercept (Hong Kong) Ltd12,356 sh | 12,356 | $26.2K |
| MAI Capital Management641 sh | 641 | $1.4K |
| Root Financial Partners164 sh | 164 | $348.00 |
| Wealth Preservation Advisors50 sh | 50 | $106.00 |
| Kilter Group1 sh | 1 | $3.00 |
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.