RBBN Ribbon Communications Inc.
Ribbon Communications Inc. (RBBN) Institutional Ownership
What the institutions did with RBBN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| JPMORGAN CHASE & CO | 52.0M | 40.6% |
| NEUBERGER BERMAN GROUP LLC | 18.3M | 14.3% |
| BlackRock, Inc. | 7.1M | 5.6% |
| DIMENSIONAL FUND ADVISORS LP | 6.3M | 4.9% |
| ROYCE & ASSOCIATES LP | 5.1M | 4.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.9M | 3.1% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 3.5M | 2.7% |
| PARADIGM CAPITAL MANAGEMENT INC/NY | 3.0M | 2.4% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.5M | 1.9% |
| Connor, Clark & Lunn Investment Management Ltd. | 2.2M | 1.7% |
| STATE STREET CORP | 1.9M | 1.5% |
| D. E. Shaw & Co., Inc. | 1.8M | 1.4% |
| ACADIAN ASSET MANAGEMENT LLC | 1.8M | 1.4% |
| AQR CAPITAL MANAGEMENT LLC | 1.4M | 1.1% |
| FIRST WILSHIRE SECURITIES MANAGEMENT INC | 1.4M | 1.1% |
| CITADEL ADVISORS LLC | 1.2M | 1.0% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.2M | 0.9% |
| MARSHALL WACE, LLP | 814.1K | 0.6% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 800.2K | 0.6% |
| NORTHERN TRUST CORP | 749.8K | 0.6% |
| MILLENNIUM MANAGEMENT LLC | 698.5K | 0.5% |
| VANGUARD FIDUCIARY TRUST CO | 612.8K | 0.5% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 582.1K | 0.5% |
| VICTORY CAPITAL MANAGEMENT INC | 456.4K | 0.4% |
| Silverberg Bernstein Capital Management LLC | 418.8K | 0.3% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| PARADIGM CAPITAL MANAGEMENT INC/NY | Reduced | 8.0M | 3.0M | -5.0M |
| NEUBERGER BERMAN GROUP LLC | Increased | 17.4M | 18.3M | +949.1K |
| CITADEL ADVISORS LLC | Increased | 575.0K | 1.2M | +666.2K |
| BlackRock, Inc. | Increased | 6.7M | 7.1M | +422.6K |
| ACADIAN ASSET MANAGEMENT LLC | Increased | 1.4M | 1.8M | +329.7K |
| GOLDMAN SACHS GROUP INC | Reduced | 744.7K | 415.4K | -329.3K |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | New | 0 | 303.6K | +303.6K |
| VANGUARD CAPITAL MANAGEMENT LLC | Reduced | 4.2M | 3.9M | -290.8K |
| D. E. Shaw & Co., Inc. | Increased | 1.5M | 1.8M | +251.9K |
| ROYCE & ASSOCIATES LP | Increased | 4.9M | 5.1M | +211.2K |
| MILLENNIUM MANAGEMENT LLC | Increased | 491.3K | 698.5K | +207.1K |
| OP Asset Management Ltd | Sold Out | 206.8K | 0 | -206.8K |
| Squarepoint Ops LLC | New | 0 | 191.4K | +191.4K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Increased | 3.3M | 3.5M | +177.4K |
| XTX Topco Ltd | Increased | 160.9K | 323.3K | +162.4K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 1.3M | 1.4M | +152.4K |
| Engineers Gate Manager LP | Sold Out | 140.0K | 0 | -140.0K |
| Qube Research & Technologies Ltd | New | 0 | 137.9K | +137.9K |
| Connor, Clark & Lunn Investment Management Ltd. | Increased | 2.1M | 2.2M | +123.4K |
| GSA CAPITAL PARTNERS LLP | Reduced | 292.8K | 174.0K | -118.7K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Reduced | 685.3K | 582.1K | -103.2K |
| TWO SIGMA INVESTMENTS, LP | New | 0 | 102.2K | +102.2K |
| HERALD INVESTMENT MANAGEMENT Ltd | Sold Out | 100.0K | 0 | -100.0K |
| WINTON GROUP Ltd | Increased | 50.1K | 149.4K | +99.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Increased | 708.2K | 800.2K | +92.0K |
| Hillsdale Investment Management Inc. | New | 0 | 91.0K | +91.0K |
| SIMPLEX TRADING, LLC | New | 0 | 73.9K | +73.9K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 2.4M | 2.5M | +70.5K |
| HighMark Wealth Management LLC | New | 0 | 69.0K | +69.0K |
| Susquehanna Portfolio Strategies, LLC | Reduced | 93.2K | 24.3K | -68.9K |
| PRUDENTIAL FINANCIAL INC | Increased | 14.6K | 82.9K | +68.3K |
| DIMENSIONAL FUND ADVISORS LP | Reduced | 6.4M | 6.3M | -64.8K |
| DEUTSCHE BANK AG\ | Increased | 25.4K | 81.9K | +56.6K |
| State of Wyoming | Sold Out | 54.9K | 0 | -54.9K |
| CITIGROUP INC | Increased | 36.6K | 87.9K | +51.3K |
| Dynamic Technology Lab Private Ltd | Increased | 59.5K | 104.9K | +45.4K |
| MARSHALL WACE, LLP | Increased | 769.8K | 814.1K | +44.3K |
| WELLS FARGO & COMPANY/MN | Increased | 37.4K | 81.5K | +44.1K |
| NORTHERN TRUST CORP | Increased | 705.9K | 749.8K | +44.0K |
| MORGAN STANLEY | Reduced | 423.5K | 379.8K | -43.7K |
| Pacific Ridge Capital Partners, LLC | Increased | 246.2K | 286.2K | +40.0K |
| Assenagon Asset Management S.A. | Increased | 37.9K | 75.9K | +37.9K |
| Creative Planning | Increased | 64.9K | 100.6K | +35.7K |
| Worth Venture Partners, LLC | New | 0 | 35.0K | +35.0K |
| VICTORY CAPITAL MANAGEMENT INC | Increased | 422.4K | 456.4K | +34.1K |
| Russell Investments Group, Ltd. | Increased | 351.9K | 385.2K | +33.4K |
| EntryPoint Capital, LLC | Increased | 140.3K | 172.9K | +32.6K |
| Virtu Financial LLC | Increased | 25.7K | 57.9K | +32.2K |
| UBS Group AG | Reduced | 192.9K | 165.4K | -27.5K |
| HSBC HOLDINGS PLC | New | 0 | 27.0K | +27.0K |
| Brevan Howard Capital Management LP | New | 0 | 26.2K | +26.2K |
| VANGUARD FIDUCIARY TRUST CO | Increased | 587.4K | 612.8K | +25.3K |
| ExodusPoint Capital Management, LP | Reduced | 196.9K | 172.6K | -24.3K |
| MACKENZIE FINANCIAL CORP | New | 0 | 22.4K | +22.4K |
| JANE STREET GROUP, LLC | New | 0 | 21.9K | +21.9K |
| Schonfeld Strategic Advisors LLC | Sold Out | 21.8K | 0 | -21.8K |
| Mariner, LLC | Increased | 23.1K | 43.3K | +20.2K |
| STATE STREET CORP | Increased | 1.9M | 1.9M | +20.1K |
| BANK OF AMERICA CORP /DE/ | Reduced | 208.2K | 188.4K | -19.8K |
| Silverberg Bernstein Capital Management LLC | Reduced | 438.1K | 418.8K | -19.3K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.