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Disclosery

RBBN RIBBON COMMUNICATIONS INC

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COMMON STOCK (common), issuer CIK 1708055

151 managers (153 13F filers) reported a position in RBBN shares at 2025-12-31, 129,650,494 shares in all. 23 filers opened a position and 24 filers sold out during the quarter.

Managers
151
13F filers
153
New
23
Added
56
Reduced
51
Sold out
24
Shares held by filers
129,650,494

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, Q4 2025

Filers in the available 13F reports with a share position at 2025-12-31, 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$150M0.01%013F-HRTimelineGroup
NEUBERGER BERMAN GROUP LLCin group NEUBERGER BERMAN GROUP LLC17,431,102$46M0.03%-822,94313F-HRTimelineGroup
PARADIGM CAPITAL MANAGEMENT INC/NY8,323,298$24M1.01%-425,90213F-HRTimeline
VANGUARD GROUP INCin group VANGUARD GROUP INC7,833,009$22.6M<0.01%+141,93913F-HRTimelineGroup
BlackRock, Inc.in group BlackRock, Inc.7,665,925$22.1M<0.01%-32,88013F-HRTimelineGroup
DIMENSIONAL FUND ADVISORS LPin group DIMENSIONAL FUND ADVISORS LP6,475,125$18.6M<0.01%-70,41013F-HRTimelineGroup
ROYCE & ASSOCIATES LP4,614,741$13.3M0.13%+309,27113F-HRTimeline
GEODE CAPITAL MANAGEMENT, LLCin group GEODE CAPITAL MANAGEMENT, LLC2,302,573$6.63M<0.01%-7,87813F-HRTimelineGroup
STATE STREET CORPin group STATE STREET CORP2,099,793$6.05M<0.01%+5,28013F-HRTimelineGroup
Connor, Clark & Lunn Investment Managem…1,995,845$5.75M0.02%+130,67613F-HRTimeline
FIRST WILSHIRE SECURITIES MANAGEMENT INC1,267,586$3.65M0.92%-37,77213F-HRTimeline
ARROWSTREET CAPITAL, LIMITED PARTNERSHIPin group ARROWSTREET CAPITAL, LIMITED …1,029,716$2.97M<0.01%+65,27013F-HRTimelineGroup
D. E. Shaw & Co., Inc.in group D. E. Shaw & Co., Inc.979,841$2.82M<0.01%+390,94913F-HRTimelineGroup
NORTHERN TRUST CORPin group NORTHERN TRUST CORP922,554$2.66M<0.01%-75,55713F-HRTimelineGroup
JACOBS LEVY EQUITY MANAGEMENT, INC890,168$2.56M0.01%+418,96713F-HRTimeline
First Eagle Investment Management, LLCin group First Eagle Investment Manage…862,528$2.48M<0.01%-171,38613F-HRTimelineGroup
HERALD INVESTMENT MANAGEMENT Ltd800,000$2.3M0.3%-112,86913F-HRTimeline
GOLDMAN SACHS GROUP INCin group GOLDMAN SACHS GROUP INC787,493$2.27M<0.01%+363,33413F-HR/ATimelineGroup
CHARLES SCHWAB INVESTMENT MANAGEMENT INCin group Charles Schwab Trust Co769,074$2.21M<0.01%-41313F-HRTimelineGroup
ACADIAN ASSET MANAGEMENT LLCin group ACADIAN ASSET MANAGEMENT LLC761,165$2.19M<0.01%+726,57313F-HRTimelineGroup
KENNEDY CAPITAL MANAGEMENT LLC710,703$2.05M0.04%new13F-HRTimeline
AQR CAPITAL MANAGEMENT LLCin group AQR CAPITAL MANAGEMENT LLC491,471$1.42M<0.01%+322,36413F-HRTimelineGroup
Silverberg Bernstein Capital Management…436,023$1.26M0.73%+8,04413F-HRTimeline
UBS Group AGgroup of 2 filers holding403,994$1.16M+24,120Timeline
MORGAN STANLEYin group MORGAN STANLEY392,391$1.13M<0.01%-112,29313F-HR/ATimelineGroup
Bank of New York Mellon Corpin group Bank of New York Mellon Corp389,994$1.12M<0.01%+54,24313F-HRTimelineGroup
JANE STREET GROUP, LLCin group JANE STREET GROUP, LLC379,465$1.09M<0.01%+178,64513F-HRTimelineGroup
VICTORY CAPITAL MANAGEMENT INC349,543$1.01M<0.01%-5,08313F-HRTimeline
STATE OF WISCONSIN INVESTMENT BOARD310,366$894K<0.01%+31,87713F-HRTimeline
GSA CAPITAL PARTNERS LLP287,583$828K0.07%+71,30013F-HRTimeline
COMMONWEALTH EQUITY SERVICES, LLC284,744$820K<0.01%-1,00013F-HRTimeline
Pacific Ridge Capital Partners, LLC246,129$709K0.16%+10,80013F-HRTimeline
AMERICAN CENTURY COMPANIES INCin group AMERICAN CENTURY COMPANIES INC213,946$616K<0.01%+5,84413F-HRTimelineGroup
BARCLAYS PLCin group BARCLAYS PLC202,461$583K<0.01%+47,69013F-HRTimelineGroup
ExodusPoint Capital Management, LP198,191$571K0.01%new13F-HRTimeline
Swiss National Bank185,474$534K<0.01%013F-HRTimeline
Nuveen, LLCin group TIAA176,235$508K<0.01%-97,24513F-HRTimelineGroup
MARSHALL WACE, LLPin group MARSHALL WACE, LLP173,702$500K<0.01%-172,39313F-HRTimelineGroup
Invesco Ltd.in group Invesco Ltd.168,915$486K<0.01%-3,95113F-HRTimelineGroup
SUSQUEHANNA INTERNATIONAL GROUP, LLPgroup of 3 filers holding164,429$474K+24,922Timeline
VOYA INVESTMENT MANAGEMENT LLCin group VOYA INVESTMENT MANAGEMENT LLC149,560$431K<0.01%+2,61813F-HRTimelineGroup
BANK OF AMERICA CORP /DE/in group BANK OF AMERICA CORP /DE/147,689$425K<0.01%+57,20313F-HRTimelineGroup
SEI INVESTMENTS COin group SEI INVESTMENTS CO140,047$403K<0.01%+43,77513F-HRTimelineGroup
LSV ASSET MANAGEMENT135,800$391K<0.01%013F-HRTimeline
AMERIPRISE FINANCIAL INCin group AMERIPRISE FINANCIAL INC128,975$371K<0.01%+28,91113F-HRTimelineGroup
RHUMBLINE ADVISERS128,287$369K<0.01%-33,52813F-HRTimeline
EntryPoint Capital, LLC124,573$359K0.14%+92,25013F-HRTimeline
ALLIANCEBERNSTEIN L.P.119,250$343K<0.01%-6713F-HRTimeline
WELLS FARGO & COMPANY/MNin group WELLS FARGO & COMPANY/MN110,798$319K<0.01%+33,15613F-HRTimelineGroup
XTX Topco Ltdin group XTX Topco Ltd102,885$296K0.01%-47,47313F-HRTimelineGroup
Legal & General Group Plcin group Legal & General Group Plc94,343$272K<0.01%-7,71313F-HRTimelineGroup
Dynamic Technology Lab Private Ltd91,026$262K0.06%+20,98213F-HRTimeline
CALIFORNIA STATE TEACHERS RETIREMENT SY…88,452$255K<0.01%-7313F-HRTimeline
Russell Investments Group, Ltd.in group Russell Investments Group, Lt…87,532$252K<0.01%-242,65513F-HRTimelineGroup
DEUTSCHE BANK AG\in group DEUTSCHE BANK AG\85,667$247K<0.01%+4,37913F-HRTimelineGroup
BAILARD, INC.74,800$215K<0.01%+2,60013F-HRTimeline
FRANKLIN RESOURCES INCin group Franklin Resources71,204$205K<0.01%-526,45913F-HRTimelineGroup
PRICE T ROWE ASSOCIATES INC /MD/69,822$202K<0.01%+9,10313F-HRTimeline
Trilogy Capital Inc.65,360$188K0.01%+40,51013F-HRTimeline
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF O…60,645$175K<0.01%+9,70013F-HRTimeline
OXFORD ASSET MANAGEMENT LLP55,568$160K0.06%new13F-HRTimelineThe filing omitted confidential holdings, a later amendment may add them.
Engineers Gate Manager LP55,480$160K<0.01%new13F-HRTimeline
MILLENNIUM MANAGEMENT LLCin group MILLENNIUM MANAGEMENT LLC54,306$156K<0.01%new13F-HRTimelineGroup
CITADEL ADVISORS LLCin group CITADEL ADVISORS LLC53,903$155K<0.01%-1,65113F-HRTimelineGroup
LOS ANGELES CAPITAL MANAGEMENT LLC42,367$142K<0.01%+73813F-HRTimeline
Zurcher Kantonalbank (Zurich Cantonalba…47,307$136K<0.01%013F-HRTimeline
Qube Research & Technologies Ltd44,058$127K<0.01%new13F-HRTimeline
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.in group Mirae Asset Global Investment…43,577$126K<0.01%-1,13713F-HRTimelineGroup
SG Americas Securities, LLC41,537$120K<0.01%+21,04113F-HRTimeline
PRELUDE CAPITAL MANAGEMENT, LLC40,738$117K0.01%+7,90013F-HRTimeline
BNP PARIBAS ASSET MANAGEMENT Holding S.…in group BNP PARIBAS ASSET MANAGEMENT …40,666$117K<0.01%+38,12113F-HRTimelineGroup
Verition Fund Management LLC40,496$117K<0.01%new13F-HRTimeline
Assenagon Asset Management S.A.40,355$116K<0.01%-10,28813F-HRTimeline
STATE BOARD OF ADMINISTRATION OF FLORID…37,543$108K<0.01%013F-HRTimeline
MetLife Investment Management, LLCin group MetLife Investment Management…37,319$107K<0.01%-16,66913F-HRTimelineGroup
JANUS HENDERSON GROUP PLCin group Janus Henderson35,625$103K<0.01%013F-HRTimelineGroup
Focus Partners Wealthin group Focus Partners Wealth35,100$101K<0.01%+1013F-HRTimelineGroup
CITIGROUP INCin group CITIGROUP INC33,340$96K<0.01%+6,66813F-HRTimelineGroup
WINTON GROUP Ltdin group WINTON GROUP Ltd33,095$95.3K<0.01%new13F-HRTimelineGroup
MANUFACTURERS LIFE INSURANCE COMPANY, T…in group MANUFACTURERS LIFE INSURANCE …31,286$90.1K<0.01%-2,74613F-HRTimelineGroup
TWO SIGMA SECURITIES, LLC30,746$88.5K0.01%new13F-HRTimeline
Global Retirement Partners, LLC29,778$85.8K<0.01%new13F-HRTimeline
ARIZONA STATE RETIREMENT SYSTEM27,369$78.8K<0.01%-1,32713F-HRTimeline
INTECH INVESTMENT MANAGEMENT LLC27,087$78K<0.01%-12,64013F-HRTimeline
ENVESTNET ASSET MANAGEMENT INCin group ENVESTNET ASSET MANAGEMENT INC26,714$76.9K<0.01%-2,34013F-HRTimelineGroup
State of Alaska, Department of Revenue25,390$72K<0.01%+17,63113F-HRTimeline
Police & Firemen's Retirement System of…24,692$71.1K<0.01%013F-HRTimeline
Essex Financial Services, Inc.in group Essex Financial Services, Inc.24,518$70.6K<0.01%+1313F-HRTimelineGroup
NEW YORK STATE COMMON RETIREMENT FUND22,549$64.9K<0.01%013F-HRTimeline
RPO LLC22,208$64K0.07%new13F-HRTimeline
NewEdge Advisors, LLC22,179$63.9K<0.01%+4,29613F-HRTimeline
KLP KAPITALFORVALTNING AS20,800$59.9K<0.01%+5,30013F-HRTimeline
VISTA INVESTMENT PARTNERS LLC20,400$58.8K0.02%013F-HRTimeline
BNP PARIBAS FINANCIAL MARKETSin group BNP PARIBAS FINANCIAL MARKETS19,708$56.8K<0.01%+1,41413F-HRTimelineGroup
IRONWOOD INVESTMENT MANAGEMENT LLC18,350$52.8K0.02%-5213F-HRTimeline
Brevan Howard Capital Management LPin group Brevan Howard Capital Managem…18,219$52.5K<0.01%+2,72013F-HRTimelineGroup
Amundiin group Amundi17,768$51.2K<0.01%new13F-HRTimelineGroup
STRS OHIO17,600$50.7K<0.01%013F-HRTimeline
JONES FINANCIAL COMPANIES LLLPin group JONES FINANCIAL COMPANIES LLLP17,268$49.7K<0.01%new13F-HRTimelineGroup
ProShare Advisors LLC17,143$49.4K<0.01%+1,07613F-HRTimeline
TWO SIGMA INVESTMENTS, LPin group TWO SIGMA INVESTMENTS, LP16,984$48.9K<0.01%-14,01613F-HRTimelineGroup
SHERBROOKE PARK ADVISERS LLC15,656$45.1K0.12%new13F-HRTimeline
Tower Research Capital LLC (TRC)in group Tower Research Capital LLC (T…14,787$42.6K<0.01%+10,48013F-HRTimelineGroup
LPL Financial LLC13,912$40.1K<0.01%+64813F-HRTimeline
WHITE PINE CAPITAL LLC13,335$38.4K0.01%-287,45013F-HRTimeline
FMR LLCin group FMR LLC13,273$38.2K<0.01%+8,38313F-HRTimelineGroup
nVerses Capital, LLC12,987$37.4K0.08%new13F-HRTimeline
DGS Capital Management, LLCin group DGS Capital Management, LLC12,475$35.9K0.01%new13F-HRTimelineGroup
JMN Financial LLC12,475$35.9K0.04%13F-HRTimeline
BOOTHBAY FUND MANAGEMENT, LLC11,104$32K<0.01%-9,37913F-HRTimeline
MACKENZIE FINANCIAL CORP10,652$31.4K<0.01%new13F-HRTimeline
Keel Point, LLC10,721$30.9K<0.01%013F-HRTimeline
Indivisible Partners10,257$29.5K<0.01%13F-HRTimeline
GRIMES & Co WEALTH MANAGEMENT, LLC10,030$28.9K<0.01%013F-HRTimeline
Fortis Advisors, LLC10,000$28.8K0.02%013F-HRTimeline
Kathmere Capital Management, LLC10,000$28.8K<0.01%new13F-HRTimeline
Ameritas Investment Partners, Inc.in group Ameritas Investment Partners,…8,663$24.9K<0.01%013F-HRTimelineGroup
OSAIC HOLDINGS, INC.in group OSAIC HOLDINGS, INC.7,577$21.8K<0.01%+7,29613F-HRTimelineGroup
Rockefeller Capital Management L.P.in group Rockefeller Capital Managemen…6,408$18.5K<0.01%+21413F-HR/ATimelineGroup
Sterling Capital Management LLC5,407$15.6K<0.01%-1,06513F-HRTimeline
COMERICA BANK4,792$13.8K<0.01%+1,05113F-HRTimeline
Farther Finance Advisors, LLC4,522$13K<0.01%-2213F-HRTimeline
CANADA LIFE ASSURANCE Coin group CANADA LIFE ASSURANCE Co3,680$11K<0.01%013F-HRTimelineGroup
ROYAL BANK OF CANADAin group ROYAL BANK OF CANADA3,114$9K<0.01%-10213F-HRTimelineGroup
Allworth Financial LP3,005$8.65K<0.01%+4813F-HRTimeline
AMALGAMATED BANK2,947$8K<0.01%-17213F-HRTimeline
SIMPLEX TRADING, LLC2,586$7.45K<0.01%-17,35613F-HRTimeline
US BANCORP \DE\in group US BANCORP \DE\2,085$6K<0.01%-7313F-HRTimelineGroup
CWM, LLCin group CWM, LLC2,194$6K<0.01%-1,74413F-HRTimelineGroup
Medallion Wealth Advisors, LLC1,920$5.53K<0.01%013F-HRTimeline
CIBC Private Wealth Group LLCin group CIBC Bancorp USA Inc.1,697$4.89K<0.01%new13F-HRTimelineGroup
Community Bank, N.A.1,400$4.02K<0.01%013F-HRTimeline
PNC Financial Services Group, Inc.in group PNC Financial Services Group,…1,063$3.06K<0.01%+2713F-HRTimelineGroup
Colonial Trust Advisorsin group Colonial Trust Advisors1,000$2.88K<0.01%new13F-HRTimelineGroup
Arax Advisory Partners718$2.07K<0.01%-3,33613F-HRTimeline
Parallel Advisors, LLC207$596<0.01%new13F-HRTimeline
Larson Financial Group LLC171$492<0.01%+6913F-HRTimeline
ROTHSCHILD INVESTMENT LLC170$490<0.01%-25013F-HRTimeline
QUADRANT CAPITAL GROUP LLC168$484<0.01%new13F-HRTimeline
IFP Advisors, Inc163$469<0.01%-7013F-HRTimeline
NISA INVESTMENT ADVISORS, LLC157$452<0.01%-913F-HRTimeline
CoreCap Advisors, LLC80$230<0.01%013F-HRTimeline
MAI Capital Management78$225<0.01%new13F-HRTimeline
GAMMA Investing LLC52$150<0.01%+4213F-HRTimeline
SIGNATUREFD, LLC38$109<0.01%-10913F-HRTimeline
Essential Partners LLC13$37<0.01%-26113F-HRTimeline
TFC Financial Management, Inc.12$35<0.01%013F-HRTimeline
SBI Securities Co., Ltd.9$26<0.01%+613F-HRTimeline
Arlington Trust Co LLCin group Arlington Trust Co LLC6$17<0.01%013F-HRTimelineGroup
True Wealth Design, LLC3$9<0.01%-25313F-HRTimeline
EverSource Wealth Advisors, LLCin group EverSource Wealth Advisors, L…2$6<0.01%-16313F-HRTimelineGroup