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.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Jmn Financial LlcBuy+12,475—12,475$35.93KQ4 2025May 15, 2026
Dgs Capital Management, LlcBuy+12,475—12,475$35.93KQ4 2025Feb 24, 2026
Newedge Advisors, LlcBuy+22,179—22,179$63.88KQ4 2025Feb 18, 2026
Mackenzie Financial CorpBuy+10,652—10,652$31.36KQ4 2025Feb 18, 2026
D. E. Shaw & Co., Inc.Buy+979,841—979,841$2.82MQ4 2025Feb 17, 2026
Northern Trust CorpBuy+922,554—922,554$2.66MQ4 2025Feb 17, 2026
Aqr Capital Management LlcBuy+491,471—491,471$1.42MQ4 2025Feb 17, 2026
State Of Wisconsin Investment BoardBuy+310,366—310,366$893.85KQ4 2025Feb 17, 2026
Exoduspoint Capital Management, LpBuy+198,191—198,191$570.79KQ4 2025Feb 17, 2026
Bank Of America CorpBuy+147,689—147,689$425.35KQ4 2025Feb 17, 2026
Ameriprise Financial IncBuy+128,975—128,975$371.45KQ4 2025Feb 17, 2026
Alliancebernstein L.P.Buy+119,250—119,250$343.44KQ4 2025Feb 17, 2026
Susquehanna Portfolio Strategies, LlcBuy+109,892—109,892$316.49KQ4 2025Feb 17, 2026
Xtx Topco LtdBuy+102,885—102,885$296.31KQ4 2025Feb 17, 2026
California State Teachers Retirement SystemBuy+88,452—88,452$254.74KQ4 2025Feb 17, 2026
Russell Investments Group, Ltd.Buy+87,532—87,532$252.09KQ4 2025Feb 17, 2026
Price T Rowe Associates IncBuy+69,822—69,822$202.00KQ4 2025Feb 17, 2026
Public Employees Retirement System Of OhioBuy+60,645—60,645$174.66KQ4 2025Feb 17, 2026
Engineers Gate Manager LpBuy+55,480—55,480$159.78KQ4 2025Feb 17, 2026
Susquehanna Fundamental Investments, LlcBuy+54,537—54,537$157.07KQ4 2025Feb 17, 2026
Millennium Management LlcBuy+54,306—54,306$156.40KQ4 2025Feb 17, 2026
Citadel Advisors LlcBuy+53,903—53,903$155.24KQ4 2025Feb 17, 2026
Qube Research & Technologies LtdBuy+44,058—44,058$126.89KQ4 2025Feb 17, 2026
Mirae Asset Global Etfs Holdings Ltd.Buy+43,577—43,577$125.50KQ4 2025Feb 17, 2026
Prelude Capital Management, LlcBuy+40,738—40,738$117.33KQ4 2025Feb 17, 2026
Janus Henderson Group PlcBuy+35,625—35,625$102.78KQ4 2025Feb 17, 2026
Two Sigma Securities, LlcBuy+30,746—30,746$88.55KQ4 2025Feb 17, 2026
Rpo LlcBuy+22,208—22,208$63.96KQ4 2025Feb 17, 2026
Brevan Howard Capital Management LpBuy+18,219—18,219$52.47KQ4 2025Feb 17, 2026
AmundiBuy+17,768—17,768$51.17KQ4 2025Feb 17, 2026
Showing 30 of 145

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.