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Disclosery

RBBN RIBBON COMMUNICATIONS INC

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COMMON STOCK (common), issuer CIK 1708055

150 managers (153 13F filers) reported a position in RBBN shares at 2025-09-30, 129,870,001 shares in all. 24 filers opened a position and 16 filers sold out during the quarter.

Managers
150
13F filers
153
New
24
Added
50
Reduced
44
Sold out
16
Shares held by filers
129,870,001

Shares held by filers adds up every 13F filer's report, so a share reported by a parent and by its subsidiary counts twice (H9). Managers counts each filer group once.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

No Form 4 transaction on this security in the data.

13F holders, Q3 2025

Filers in the available 13F reports with a share position at 2025-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

HolderSharesValue% of portfolioChangeSource
JPMORGAN CHASE & COin group JPMORGAN CHASE & CO52,037,577$198M0.01%013F-HR/ATimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC18,254,045$64.5M0.05%-207,91513F-HRTimelineGroup
PARADIGM CAPITAL MANAGEMENT INC/NY8,749,200$33.2M1.44%+1,00013F-HRTimeline
BlackRock, Inc.in group BlackRock, Inc.7,698,805$29.3M<0.01%-40,03013F-HRTimelineGroup
VANGUARD GROUP INCin group VANGUARD GROUP INC7,691,070$29.2M<0.01%+166,68313F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP6,545,535$24.9M0.01%-19,63113F-HRTimelineGroup
ROYCE & ASSOCIATES LP4,305,470$16.4M0.16%+633,03513F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,310,451$8.78M<0.01%+7,19513F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,094,513$7.96M<0.01%+1,69413F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…1,865,169$7.09M0.02%+389,11613F-HRTimeline
FIRST WILSHIRE SECURITIES MANAGEMENT INC1,305,358$4.96M1.32%-25,84213F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…1,033,914$3.93M0.01%+8,00013F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP998,111$3.79M<0.01%-82813F-HRTimelineGroup
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …964,446$3.66M<0.01%+481,27613F-HRTimelineGroup
HERALD INVESTMENT MANAGEMENT Ltd912,869$3.47M0.46%013F-HRTimeline
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co769,487$2.92M<0.01%+3,28913F-HRTimelineGroup
FRANKLIN RESOURCES INCin group Franklin Resources597,663$2.27M<0.01%-493,13513F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.588,892$2.24M<0.01%+172,20513F-HRTimelineGroup
Cinctive Capital Management LP524,067$1.99M0.1%new13F-HRTimeline
MORGAN STANLEYin group MORGAN STANLEY504,684$1.92M<0.01%+247,71813F-HR/ATimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC471,201$1.79M0.01%+39,10413F-HRTimeline
Silverberg Bernstein Capital Management…427,979$1.63M0.99%+35,40013F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC424,159$1.61M<0.01%+181,44813F-HRTimelineGroup
UBS Group AGgroup of 2 filers holding379,874$1.44M-259,869Timeline
VICTORY CAPITAL MANAGEMENT INC354,626$1.35M<0.01%-136,55113F-HRTimeline
RAYMOND JAMES FINANCIAL INCin group RAYMOND JAMES FINANCIAL INC348,802$1.33M<0.01%+16013F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP346,095$1.32M<0.01%new13F-HRTimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp335,751$1.28M<0.01%+7,61213F-HRTimelineGroup
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…330,187$1.25M<0.01%+126,96313F-HRTimelineGroup
WHITE PINE CAPITAL LLC300,785$1.14M0.33%-118,17213F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC285,744$1.09M<0.01%-4,53213F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD278,489$1.06M<0.01%+2,58613F-HRTimeline
TIAAgroup of 2 filers holding273,480$1.04M-11,041Timeline
AXA Investment Managers S.A.269,401$1.02M<0.01%13F-HRTimeline
Pacific Ridge Capital Partners, LLC235,329$894K0.2%013F-HRTimeline
GSA CAPITAL PARTNERS LLP216,283$822K0.07%+6,17313F-HRTimeline
LAZARD ASSET MANAGEMENT LLCin group LAZARD ASSET MANAGEMENT LLC208,956$794K<0.01%new13F-HRTimelineGroup
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC208,102$791K<0.01%+24,05513F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC200,820$763K<0.01%+128,42413F-HRTimelineGroup
Swiss National Bank185,474$705K<0.01%013F-HRTimeline
Invesco Ltd.in group Invesco Ltd.172,866$657K<0.01%+3,47113F-HRTimelineGroup
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC169,107$643K<0.01%-55,99313F-HRTimelineGroup
RHUMBLINE ADVISERS161,815$615K<0.01%-14,77713F-HRTimeline
Penn Capital Management Company, LLC160,129$608K0.05%+40,31413F-HRTimeline
BARCLAYS PLCin group BARCLAYS PLC154,771$588K<0.01%-45,27813F-HR/ATimelineGroup
XTX Topco Ltdin group XTX Topco Ltd150,358$571K0.03%+92,36313F-HRTimelineGroup
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC146,942$558K<0.01%-18,51613F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding139,507$530K-18,454Timeline
LSV ASSET MANAGEMENT135,800$516K<0.01%new13F-HRTimeline
Squarepoint Ops LLCin group Squarepoint Ops LLC127,152$483K<0.01%new13F-HRTimelineGroup
ALLIANCEBERNSTEIN L.P.119,317$453K<0.01%+6,00013F-HRTimeline
Legal & General Group Plcin group Legal & General Group Plc102,056$388K<0.01%013F-HRTimelineGroup
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC100,064$380K<0.01%-48,64613F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO96,272$366K<0.01%+1,51713F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/90,486$344K<0.01%-14,14813F-HR/ATimelineGroup
CALIFORNIA STATE TEACHERS RETIREMENT SY…88,525$336K<0.01%-98113F-HRTimeline
POLEN CAPITAL MANAGEMENT LLC87,246$332K<0.01%-42,94213F-HRTimeline
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\81,288$309K<0.01%+9,88513F-HRTimelineGroup
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN77,642$295K<0.01%+11,88713F-HRTimelineGroup
BAILARD, INC.72,200$274K0.01%+8,60013F-HRTimeline
Dynamic Technology Lab Private Ltd70,044$266K0.05%new13F-HRTimeline
Round Rock Advisors LLC74,240$256K0.04%new13F-HRTimeline
PRICE T ROWE ASSOCIATES INC /MD/60,719$231K<0.01%+58013F-HRTimeline
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC55,554$211K<0.01%new13F-HRTimelineGroup
MetLife Investment Management, LLCin group MetLife Investment Management…53,988$205K<0.01%-2,68813F-HRTimelineGroup
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…50,945$194K<0.01%013F-HRTimeline
Assenagon Asset Management S.A.50,643$192K<0.01%-19,48013F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…47,307$180K<0.01%013F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…44,714$170K<0.01%-7,87613F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC41,629$158K<0.01%-22,53113F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC39,727$151K<0.01%-39,92713F-HRTimeline
RENAISSANCE TECHNOLOGIES LLC38,800$147K<0.01%+11,30013F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…37,543$143K<0.01%013F-HRTimeline
JANUS HENDERSON GROUP PLCin group Janus Henderson35,625$136K<0.01%013F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth35,090$133K<0.01%-49513F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC34,592$131K<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …34,032$129K<0.01%-2,81013F-HRTimelineGroup
PRELUDE CAPITAL MANAGEMENT, LLC32,838$125K0.01%+9,10013F-HRTimeline
EntryPoint Capital, LLC32,323$123K0.05%new13F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP31,000$118K<0.01%+10,18913F-HRTimelineGroup
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC29,054$110K<0.01%-83813F-HRTimelineGroup
ARIZONA STATE RETIREMENT SYSTEM28,696$109K<0.01%+49713F-HRTimeline
CITIGROUP INCin group CITIGROUP INC26,672$101K<0.01%-24,42413F-HRTimelineGroup
Trilogy Capital Inc.24,850$94.4K<0.01%new13F-HRTimeline
HighTower Advisors, LLC24,828$94.3K<0.01%-31913F-HRTimeline
Police & Firemen's Retirement System of…24,692$93.8K<0.01%+3,45313F-HRTimeline
Essex Financial Services, Inc.in group Essex Financial Services, Inc.24,505$93.1K0.01%+42913F-HRTimelineGroup
HSBC HOLDINGS PLCin group HSBC HOLDINGS PLC23,528$88K<0.01%-9,07113F-HRTimelineGroup
Creative Planningin group Creative Planning22,945$87.2K<0.01%-1,67613F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND22,549$85.7K<0.01%013F-HRTimeline
MQS Management LLC21,308$81K0.05%new13F-HRTimeline
SG Americas Securities, LLC20,496$78K<0.01%new13F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC20,483$77.8K<0.01%-61,45413F-HRTimeline
VISTA INVESTMENT PARTNERS LLC20,400$77.5K0.02%013F-HRTimeline
SIMPLEX TRADING, LLC19,942$75K<0.01%+6213F-HRTimeline
IRONWOOD INVESTMENT MANAGEMENT LLC18,402$69.9K0.03%-24313F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS18,294$69.5K<0.01%+9,66213F-HRTimelineGroup
NewEdge Advisors, LLC17,883$68K<0.01%new13F-HRTimeline
STRS OHIO17,600$66.9K<0.01%013F-HRTimeline
ProShare Advisors LLC16,067$61.1K<0.01%-3,16913F-HRTimeline
KLP KAPITALFORVALTNING AS15,500$58.9K<0.01%013F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…15,499$58.9K<0.01%new13F-HRTimelineGroup
Vestmark Advisory Solutions, Inc.15,069$57.3K<0.01%new13F-HRTimeline
Empowered Funds, LLC14,502$55.1K<0.01%new13F-HRTimeline
First Bank & Trust13,725$52.2K0.01%013F-HRTimeline
LPL Financial LLC13,264$50.4K<0.01%+2,22313F-HRTimeline
NewEdge Wealth, LLC15,069$48.5K<0.01%013F-HRTimeline
TEACHER RETIREMENT SYSTEM OF TEXAS12,441$47.3K<0.01%-59,58113F-HRTimeline
PRUDENTIAL FINANCIAL INCin group PRUDENTIAL FINANCIAL INC11,711$44.5K<0.01%013F-HRTimelineGroup
Ballentine Partners, LLC11,076$42.1K<0.01%013F-HRTimeline
Schonfeld Strategic Advisors LLC10,826$41.1K<0.01%new13F-HRTimeline
Keel Point, LLC10,721$40.7K<0.01%-38113F-HRTimeline
GRIMES & Co WEALTH MANAGEMENT, LLC10,030$38.1K<0.01%013F-HRTimeline
Fortis Advisors, LLC10,000$38K0.02%013F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,663$32.9K<0.01%013F-HRTimelineGroup
State of Alaska, Department of Revenue7,759$29K<0.01%new13F-HRTimeline
Sterling Capital Management LLC6,472$24.6K<0.01%+4,01913F-HRTimeline
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…6,194$23.5K<0.01%new13F-HRTimelineGroup
FMR LLCin group FMR LLC4,890$18.6K<0.01%-70113F-HRTimelineGroup
Farther Finance Advisors, LLC4,544$17.3K<0.01%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…4,307$16.4K<0.01%-5,71813F-HRTimelineGroup
Arax Advisory Partners4,054$15.4K<0.01%new13F-HRTimeline
CWM, LLCin group CWM, LLC3,938$15K<0.01%+41313F-HRTimelineGroup
COMERICA BANK3,741$14.2K<0.01%-82213F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co3,680$14K<0.01%013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,216$12K<0.01%-8,10213F-HRTimelineGroup
AMALGAMATED BANK3,119$12K<0.01%013F-HRTimeline
Allworth Financial LP2,957$11.2K<0.01%+4413F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …2,545$10K<0.01%+18313F-HRTimelineGroup
US BANCORP \DE\in group US BANCORP \DE\2,158$8.2K<0.01%-1,49313F-HRTimelineGroup
Medallion Wealth Advisors, LLC1,920$7.3K<0.01%013F-HRTimeline
Community Bank, N.A.1,400$5.31K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,036$3.94K<0.01%013F-HRTimelineGroup
Optiver Holding B.V.in group Optiver Holding B.V.662$2.52K<0.01%new13F-HRTimelineGroup
ROTHSCHILD INVESTMENT LLC420$1.6K<0.01%013F-HRTimeline
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.281$1.07K<0.01%013F-HRTimelineGroup
Essential Partners LLC274$1.04K<0.01%+113F-HRTimeline
True Wealth Design, LLC256$973<0.01%+5713F-HRTimeline
IFP Advisors, Inc233$885<0.01%+19013F-HR/ATimeline
MARYLAND CAPITAL ADVISORS INC.200$760<0.01%013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC166$631<0.01%013F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…165$627<0.01%-4813F-HRTimelineGroup
SIGNATUREFD, LLC147$559<0.01%+7413F-HRTimeline
Larson Financial Group LLC102$388<0.01%013F-HRTimeline
CoreCap Advisors, LLC80$304<0.01%013F-HRTimeline
TFC Financial Management, Inc.12$46<0.01%013F-HRTimeline
GAMMA Investing LLC10$38<0.01%013F-HRTimeline
Arlington Trust Co LLCin group Arlington Trust Co LLC6$23<0.01%013F-HRTimelineGroup
Clearstead Advisors, LLC5$19<0.01%new13F-HRTimeline
SBI Securities Co., Ltd.3$11<0.01%-49713F-HRTimeline