RBBN · Ribbon Communications Inc.
Market Cap
$355.86M
Shares
178.82M
Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.
Holders: 161
Total Value: $300,685,777
Total Shares: 128,498,241
Showing 1–100
of 164 holdings by value
· page 1 of 2
Institutional Ownership Trend
26 quarters
Holder Concentration
Across 161 13F filers · Δ vs Mar 31, 2026Top Holder
40.5%
+0.3 pts
Top 5
69.2%
−0.8 pts
Top 10
81.0%
−2.0 pts
HHI
1,957
Moderately concentrated+22
Quarterly Activity
vs Mar 31, 2026
New
24
Increased
64
Decreased
41
Sold Out
13
Unchanged
32
Holder count:
+11
Institutional value:
+9.6%
Shares held:
-0.7%
Top Buyers
vs Mar 31, 2026| Institution | Added | Now Holds | Open |
|---|---|---|---|
| Mega NEUBERGER BERMAN GROUP LLC | +949,085 | 18,311,073 | |
| Mega CITADEL ADVISORS LLC | +676,111 | 1,268,900 | |
| Mega BlackRock, Inc. | +422,583 | 7,146,590 | |
| Large ACADIAN ASSET MANAGEMENT LLC | +329,737 | 1,768,227 | |
| Mega D. E. Shaw & Co., Inc. | +251,903 | 1,790,375 |
Top Sellers
vs Mar 31, 2026| Institution | Sold | Now Holds | Open |
|---|---|---|---|
| Mid PARADIGM CAPITAL MANAGEMENT INC/NY | −4,999,937 | 3,036,398 | |
| Mega GOLDMAN SACHS GROUP INC | −329,315 | 415,430 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | −290,833 | 3,925,626 | |
| Mid GSA CAPITAL PARTNERS LLP | −118,712 | 174,044 | |
| Large JACOBS LEVY EQUITY MANAGEMENT, INC | −103,217 | 582,093 |
Top New Positions
vs Mar 31, 2026| Institution | Acquired | Value (USD) | Open |
|---|---|---|---|
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 303,599 | $710,421 | |
| Large Squarepoint Ops LLC | 191,402 | $447,880 | |
| Mega Qube Research & Technologies Ltd | 137,899 | $322,683 | |
| Mega TWO SIGMA INVESTMENTS, LP | 102,187 | $239,117 | |
| Mid Hillsdale Investment Management Inc. | 91,013 | $212,970 |
Top Sold-Out Positions
vs Mar 31, 2026| Institution | Previously Held | Last Value (USD) | Open |
|---|---|---|---|
| Mid OP Asset Management Ltd | 206,802 | $438,420 | |
| Mid Engineers Gate Manager LP | 139,962 | $296,719 | |
| Small HERALD INVESTMENT MANAGEMENT Ltd | 100,000 | $212,000 | |
| Small State of Wyoming | 54,933 | $116,457 | |
| Large Schonfeld Strategic Advisors LLC | 21,784 | $46,182 |
| Holder | Value (USD) | % of 13F | Shares | Type | Filed | Open |
|---|---|---|---|---|---|---|
| Mega JPMORGAN CHASE & CO | $121,780,468 | 40.50% | 52,042,936 | Shares | 2026-08-12 | |
| Mega NEUBERGER BERMAN GROUP LLC | $42,847,910 | 14.25% | 18,311,073 | Shares | 2026-08-13 | |
| Mega BlackRock, Inc. | $16,723,015 | 5.56% | 7,146,590 | Shares | 2026-08-07 | |
| Mega DIMENSIONAL FUND ADVISORS LP | $14,709,995 | 4.89% | 6,286,323 | Shares | 2026-08-11 | |
| Large ROYCE & ASSOCIATES LP | $11,912,769 | 3.96% | 5,090,927 | Shares | 2026-08-14 | |
| Mega VANGUARD CAPITAL MANAGEMENT LLC | $9,185,964 | 3.06% | 3,925,626 | Shares | 2026-08-13 | |
| Mega VANGUARD PORTFOLIO MANAGEMENT LLC | $8,220,576 | 2.73% | 3,513,067 | Shares | 2026-08-13 | |
| Mid PARADIGM CAPITAL MANAGEMENT INC/NY | $7,105,171 | 2.36% | 3,036,398 | Shares | 2026-08-13 | |
| Mega GEODE CAPITAL MANAGEMENT, LLC | $5,815,049 | 1.93% | 2,485,064 | Shares | 2026-08-12 | |
| Large Connor, Clark & Lunn Investment Management Ltd. | $5,178,733 | 1.72% | 2,213,134 | Shares | 2026-08-13 | |
| Mega STATE STREET CORP | $4,516,558 | 1.50% | 1,930,153 | Shares | 2026-08-07 | |
| Mega D. E. Shaw & Co., Inc. | $4,189,477 | 1.39% | 1,790,375 | Shares | 2026-08-14 | |
| Large ACADIAN ASSET MANAGEMENT LLC | $4,137,651 | 1.38% | 1,768,227 | Shares | 2026-08-13 | |
| Mega AQR CAPITAL MANAGEMENT LLC | $3,298,917 | 1.10% | 1,409,795 | Shares | 2026-08-14 | |
| Small FIRST WILSHIRE SECURITIES MANAGEMENT INC Broker-Dealer | $3,286,513 | 1.09% | 1,404,493 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $2,904,407 | 0.97% | 1,241,200 | Shares | 2026-09-02 | |
| Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $2,843,638 | 0.95% | 1,215,230 | Shares | 2026-08-13 | |
| Large MARSHALL WACE, LLP | $1,905,068 | 0.63% | 814,132 | Shares | 2026-08-13 | |
| Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $1,872,372 | 0.62% | 800,159 | Shares | 2026-08-14 | |
| Mega NORTHERN TRUST CORP Bank | $1,754,585 | 0.58% | 749,823 | Shares | 2026-08-13 | |
| Mega MILLENNIUM MANAGEMENT LLC | $1,634,391 | 0.54% | 698,458 | Shares | 2026-08-14 | |
| Mega VANGUARD FIDUCIARY TRUST CO Bank | $1,433,888 | 0.48% | 612,773 | Shares | 2026-08-13 | |
| Large JACOBS LEVY EQUITY MANAGEMENT, INC | $1,362,097 | 0.45% | 582,093 | Shares | 2026-08-14 | |
| Mega VICTORY CAPITAL MANAGEMENT INC | $1,068,025 | 0.36% | 456,421 | Shares | 2026-08-07 | |
| Small Silverberg Bernstein Capital Management LLC | $980,045 | 0.33% | 418,823 | Shares | 2026-07-07 | |
| Mega GOLDMAN SACHS GROUP INC | $972,104 | 0.32% | 415,430 | Shares | 2026-08-14 | |
| Mega Russell Investments Group, Ltd. | $901,425 | 0.30% | 385,226 | Shares | 2026-08-06 | |
| Mega Bank of New York Mellon Corp Bank | $888,731 | 0.30% | 379,800 | Shares | 2026-08-06 | |
| Mega MORGAN STANLEY | $888,705 | 0.30% | 379,790 | Shares | 2026-08-13 | |
| Mid XTX Topco Ltd | $756,538 | 0.25% | 323,307 | Shares | 2026-08-14 | |
| Large BNP PARIBAS ASSET MANAGEMENT Holding S.A. | $710,421 | 0.24% | 303,599 | Shares | 2026-08-13 | |
| Small Pacific Ridge Capital Partners, LLC | $669,738 | 0.22% | 286,213 | Shares | 2026-08-12 | |
| Large COMMONWEALTH EQUITY SERVICES, LLC | $666,251 | 0.22% | 284,723 | Shares | 2026-07-29 | |
| Large VOYA INVESTMENT MANAGEMENT LLC | $502,816 | 0.17% | 214,879 | Shares | 2026-08-12 | |
| Mega AMERICAN CENTURY COMPANIES INC | $493,917 | 0.16% | 211,076 | Shares | 2026-08-12 | |
| Large Squarepoint Ops LLC | $447,880 | 0.15% | 191,402 | Shares | 2026-08-14 | |
| Mega BANK OF AMERICA CORP /DE/ Bank | $440,942 | 0.15% | 188,437 | Shares | 2026-08-14 | |
| Mega Nuveen, LLC | $414,650 | 0.14% | 177,201 | Shares | 2026-08-11 | |
| Mid GSA CAPITAL PARTNERS LLP | $407,262 | 0.14% | 174,044 | Shares | 2026-08-06 | |
| Small EntryPoint Capital, LLC | $404,539 | 0.13% | 172,880 | Shares | 2026-08-13 | |
| Large ExodusPoint Capital Management, LP | $403,919 | 0.13% | 172,615 | Shares | 2026-08-14 | |
| Mega UBS Group AG | $386,970 | 0.13% | 165,372 | Shares | 2026-08-13 | |
| Mega Invesco Ltd. | $380,644 | 0.13% | 162,669 | Shares | 2026-08-14 | |
| Mid WINTON GROUP Ltd | $349,605 | 0.12% | 149,404 | Shares | 2026-08-07 | |
| Mega UBS Group AG | $331,110 | 0.11% | 141,500 | Call | 2026-08-13 | |
| Mega ALLIANCEBERNSTEIN L.P. | $323,324 | 0.11% | 138,173 | Shares | 2026-08-14 | |
| Mega Qube Research & Technologies Ltd | $322,683 | 0.11% | 137,899 | Shares | 2026-08-14 | |
| Large LSV ASSET MANAGEMENT | $317,772 | 0.11% | 135,800 | Shares | 2026-08-06 | |
| Mega Vanguard Global Advisers, LLC | $295,443 | 0.10% | 126,258 | Shares | 2026-08-13 | |
| Mega RHUMBLINE ADVISERS | $295,275 | 0.10% | 126,186 | Shares | 2026-08-12 | |
| Small Dynamic Technology Lab Private Ltd | $245,377 | 0.08% | 104,862 | Shares | 2026-08-13 | |
| Mega AMERIPRISE FINANCIAL INC | $241,924 | 0.08% | 103,387 | Shares | 2026-08-14 | |
| Mega TWO SIGMA INVESTMENTS, LP | $239,117 | 0.08% | 102,187 | Shares | 2026-08-14 | |
| Large Creative Planning | $235,464 | 0.08% | 100,626 | Shares | 2026-08-13 | |
| Mega BARCLAYS PLC | $221,127 | 0.07% | 94,499 | Shares | 2026-08-14 | |
| Large Empowered Funds, LLC | $220,938 | 0.07% | 94,418 | Shares | 2026-08-17 | |
| Mid BRIDGEWAY CAPITAL MANAGEMENT, LLC | $220,938 | 0.07% | 94,418 | Shares | 2026-08-14 | |
| Mega FRANKLIN RESOURCES INC | $216,561 | 0.07% | 92,548 | Shares | 2026-08-13 | |
| Mid Hillsdale Investment Management Inc. | $212,970 | 0.07% | 91,013 | Shares | 2026-08-12 | |
| Mega CITIGROUP INC | $205,701 | 0.07% | 87,907 | Shares | 2026-08-03 | |
| Mega PRICE T ROWE ASSOCIATES INC /MD/ | $200,640 | 0.07% | 85,744 | Shares | 2026-08-14 | |
| Large PRUDENTIAL FINANCIAL INC | $194,074 | 0.06% | 82,938 | Shares | 2026-08-12 | |
| Mega DEUTSCHE BANK AG\ Bank | $191,727 | 0.06% | 81,935 | Shares | 2026-08-07 | |
| Mega WELLS FARGO & COMPANY/MN | $190,727 | 0.06% | 81,508 | Shares | 2026-08-14 | |
| Large SEI INVESTMENTS CO | $183,334 | 0.06% | 78,348 | Shares | 2026-08-14 | |
| Mid SIMPLEX TRADING, LLC | $172,867 | 0.06% | 73,875 | Shares | 2026-08-12 | |
| Small HighMark Wealth Management LLC | $161,460 | 0.05% | 69,000 | Shares | 2026-08-12 | |
| Large PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO Pension | $141,909 | 0.05% | 60,645 | Shares | 2026-08-17 | |
| Mid Virtu Financial LLC | $135,486 | 0.05% | 57,900 | Shares | 2026-08-13 | |
| Large MetLife Investment Management, LLC | $124,050 | 0.04% | 53,013 | Shares | 2026-08-14 | |
| Mid PRELUDE CAPITAL MANAGEMENT, LLC | $122,002 | 0.04% | 52,138 | Shares | 2026-08-14 | |
| Large Vident Advisory, LLC | $117,449 | 0.04% | 50,192 | Shares | 2026-08-12 | |
| Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP | $110,389 | 0.04% | 47,175 | Shares | 2026-08-14 | |
| Mid SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC | $109,186 | 0.04% | 46,661 | Shares | 2026-08-14 | |
| Large Mariner, LLC | $101,387 | 0.03% | 43,328 | Shares | 2026-08-13 | |
| Large MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. Mutual Fund | $101,013 | 0.03% | 43,168 | Shares | 2026-08-14 | |
| Large Assenagon Asset Management S.A. | $88,749 | 0.03% | 37,927 | Shares | 2026-08-21 | |
| Large STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM Pension | $87,850 | 0.03% | 37,543 | Shares | 2026-08-10 | |
| Micro Worth Venture Partners, LLC Venture Capital | $81,900 | 0.03% | 35,000 | Shares | 2026-08-10 | |
| Mega SG Americas Securities, LLC Broker-Dealer | $81,427 | 0.03% | 34,798 | Shares | 2026-08-07 | |
| Large Focus Partners Wealth | $76,578 | 0.03% | 32,726 | Shares | 2026-08-12 | |
| Small Polymer Capital Management (US) LLC | $66,350 | 0.02% | 28,355 | Shares | 2026-08-14 | |
| Mega CITADEL ADVISORS LLC | $64,818 | 0.02% | 27,700 | Call | 2026-09-02 | |
| Mega ENVESTNET ASSET MANAGEMENT INC | $64,801 | 0.02% | 27,693 | Shares | 2026-08-03 | |
| Mega HSBC HOLDINGS PLC | $63,158 | 0.02% | 26,991 | Shares | 2026-08-14 | |
| Mid Brevan Howard Capital Management LP | $61,200 | 0.02% | 26,154 | Shares | 2026-08-14 | |
| Small Abacus Wealth Partners, LLC | $61,052 | 0.02% | 26,091 | Shares | 2026-07-22 | |
| Mega MANUFACTURERS LIFE INSURANCE COMPANY, THE Insurance | $59,826 | 0.02% | 25,567 | Shares | 2026-08-14 | |
| Mid State of Alaska, Department of Revenue | $59,412 | 0.02% | 25,390 | Shares | 2026-07-20 | |
| Mid Essex Financial Services, Inc. | $58,055 | 0.02% | 24,810 | Shares | 2026-08-10 | |
| Large Police & Firemen's Retirement System of New Jersey Pension | $57,779 | 0.02% | 24,692 | Shares | 2026-07-23 | |
| Mid Susquehanna Portfolio Strategies, LLC | $56,953 | 0.02% | 24,339 | Shares | 2026-08-14 | |
| Mid Global Retirement Partners, LLC Pension | $56,864 | 0.02% | 24,301 | Shares | 2026-08-06 | |
| Large NEW YORK STATE COMMON RETIREMENT FUND Pension | $52,764 | 0.02% | 22,549 | Shares | 2026-07-29 | |
| Large JONES FINANCIAL COMPANIES LLLP | $52,612 | 0.02% | 22,484 | Shares | 2026-08-14 | |
| Large MACKENZIE FINANCIAL CORP | $52,327 | 0.02% | 22,362 | Shares | 2026-08-13 | |
| Mega JANE STREET GROUP, LLC | $51,201 | 0.02% | 21,881 | Shares | 2026-08-14 | |
| Large INTECH INVESTMENT MANAGEMENT LLC | $48,531 | 0.02% | 20,740 | Shares | 2026-08-10 | |
| Large IEQ CAPITAL, LLC | $47,820 | 0.02% | 20,436 | Shares | 2026-08-11 | |
| Small VISTA INVESTMENT PARTNERS LLC | $47,736 | 0.02% | 20,400 | Shares | 2026-07-09 |
Key facts
CIK
1708055
CUSIP
762544104
13F (30d)
112 filings
112 filers
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Investor relations