RIBBON COMMUNICATIONS INC (RBBN) Institutional Ownership Changes & 13F Activity
RIBBON COMMUNICATIONS INC (RBBN). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings (Q4 2025). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include D. E. Shaw & Co., Inc., Northern Trust Corp, Aqr Capital Management Llc, State Of Wisconsin Investment Board, and Exoduspoint Capital Management, Lp.
| Institution | Type | Change in shares | Change Position % | Shares | Reported stock balance | Portfolio quarter | Filing date |
|---|---|---|---|---|---|---|---|
| Jmn Financial Llc | Buy | +12,475 | — | 12,475 | $35.93K | Q4 2025 | May 15, 2026 |
| Dgs Capital Management, Llc | Buy | +12,475 | — | 12,475 | $35.93K | Q4 2025 | Feb 24, 2026 |
| Newedge Advisors, Llc | Buy | +22,179 | — | 22,179 | $63.88K | Q4 2025 | Feb 18, 2026 |
| Mackenzie Financial Corp | Buy | +10,652 | — | 10,652 | $31.36K | Q4 2025 | Feb 18, 2026 |
| D. E. Shaw & Co., Inc. | Buy | +979,841 | — | 979,841 | $2.82M | Q4 2025 | Feb 17, 2026 |
| Northern Trust Corp | Buy | +922,554 | — | 922,554 | $2.66M | Q4 2025 | Feb 17, 2026 |
| Aqr Capital Management Llc | Buy | +491,471 | — | 491,471 | $1.42M | Q4 2025 | Feb 17, 2026 |
| State Of Wisconsin Investment Board | Buy | +310,366 | — | 310,366 | $893.85K | Q4 2025 | Feb 17, 2026 |
| Exoduspoint Capital Management, Lp | Buy | +198,191 | — | 198,191 | $570.79K | Q4 2025 | Feb 17, 2026 |
| Bank Of America Corp | Buy | +147,689 | — | 147,689 | $425.35K | Q4 2025 | Feb 17, 2026 |
| Ameriprise Financial Inc | Buy | +128,975 | — | 128,975 | $371.45K | Q4 2025 | Feb 17, 2026 |
| Alliancebernstein L.P. | Buy | +119,250 | — | 119,250 | $343.44K | Q4 2025 | Feb 17, 2026 |
| Susquehanna Portfolio Strategies, Llc | Buy | +109,892 | — | 109,892 | $316.49K | Q4 2025 | Feb 17, 2026 |
| Xtx Topco Ltd | Buy | +102,885 | — | 102,885 | $296.31K | Q4 2025 | Feb 17, 2026 |
| California State Teachers Retirement System | Buy | +88,452 | — | 88,452 | $254.74K | Q4 2025 | Feb 17, 2026 |
| Russell Investments Group, Ltd. | Buy | +87,532 | — | 87,532 | $252.09K | Q4 2025 | Feb 17, 2026 |
| Price T Rowe Associates Inc | Buy | +69,822 | — | 69,822 | $202.00K | Q4 2025 | Feb 17, 2026 |
| Public Employees Retirement System Of Ohio | Buy | +60,645 | — | 60,645 | $174.66K | Q4 2025 | Feb 17, 2026 |
| Engineers Gate Manager Lp | Buy | +55,480 | — | 55,480 | $159.78K | Q4 2025 | Feb 17, 2026 |
| Susquehanna Fundamental Investments, Llc | Buy | +54,537 | — | 54,537 | $157.07K | Q4 2025 | Feb 17, 2026 |
| Millennium Management Llc | Buy | +54,306 | — | 54,306 | $156.40K | Q4 2025 | Feb 17, 2026 |
| Citadel Advisors Llc | Buy | +53,903 | — | 53,903 | $155.24K | Q4 2025 | Feb 17, 2026 |
| Qube Research & Technologies Ltd | Buy | +44,058 | — | 44,058 | $126.89K | Q4 2025 | Feb 17, 2026 |
| Mirae Asset Global Etfs Holdings Ltd. | Buy | +43,577 | — | 43,577 | $125.50K | Q4 2025 | Feb 17, 2026 |
| Prelude Capital Management, Llc | Buy | +40,738 | — | 40,738 | $117.33K | Q4 2025 | Feb 17, 2026 |
| Janus Henderson Group Plc | Buy | +35,625 | — | 35,625 | $102.78K | Q4 2025 | Feb 17, 2026 |
| Two Sigma Securities, Llc | Buy | +30,746 | — | 30,746 | $88.55K | Q4 2025 | Feb 17, 2026 |
| Rpo Llc | Buy | +22,208 | — | 22,208 | $63.96K | Q4 2025 | Feb 17, 2026 |
| Brevan Howard Capital Management Lp | Buy | +18,219 | — | 18,219 | $52.47K | Q4 2025 | Feb 17, 2026 |
| Amundi | Buy | +17,768 | — | 17,768 | $51.17K | Q4 2025 | Feb 17, 2026 |
Frequently asked questions about RBBN activity
Which institutional owners are buying RBBN?
Institutional owners buying RBBN include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.
What does "buy" mean in RBBN activity?
"Buy" means an investor increased their reported position in RBBN compared to the prior reporting period. This reflects growing exposure to RIBBON COMMUNICATIONS INC (RBBN) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).
Is institutional interest in RBBN increasing?
Institutional interest in RBBN can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.
Related RBBN Institutional Insights
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- RBBN Insider Trading & SEC Form 4 Activity
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