RBBN · Ribbon Communications Inc. · Shareholders & Ownership

$1.40 +0.01 (+0.72%) At close · Oct 23

Russell 2000 member Rebalance outlook locked

Market Cap

$248.56M

178.82M

Volume · Oct 23 778.35K Avg daily vol (3M) 1M

Every disclosed holder of RBBN in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.

How the holder list picks a filing →

Who Owns RBBN

13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions

Holder group	Holders	Shares	% Out	Summed
Institutional (13F)	163	128,454,392	71.83%	Yes
Insiders (Forms 3, 4, 5)	12	7,092,882	3.97%	Yes
13D/G-only blocks	0	0	0.00%	Yes
Remaining	—	43,276,078	24.20%	Rest
Registered funds (N-PORT, not summed)	159	31,675,996	17.71%	No

Shares outstanding: 178,823,352, the issuer's latest cover-page count restated onto today's split basis.

13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.

Holders of RBBN

One row per holder Every filing By ultimate parent

All 13F Funds Insiders 13D/G Non-US

#	Holder	Shares	% Out	Change	As of	Notes
1	JPMORGAN CHASE & CO 13F CIK 19617 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	52,042,936	29.10%	-100	Jun 30, 2026	carried, not yet filed for the newest quarter
1.1	JPMORGAN CHASE & CO Insider CIK 19617 · Apr 9, 2025 10% Owner, issuer-wide, not summed	52,036,572	29.10%	+441,645	Apr 9, 2025	10% Owner, issuer-wide, not summed
2	NEUBERGER BERMAN GROUP LLC 13F CIK 1465109 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	18,311,073	10.24%	+949,085	Jun 30, 2026	carried, not yet filed for the newest quarter
2.1	Neuberger Intrinsic Value Fund Fund S000028676 · Registered fund · May 31, 2026 NEUBERGER BERMAN EQUITY FUNDS, not summed	4,179,246	2.34%	-3,207	May 31, 2026	NEUBERGER BERMAN EQUITY FUNDS, not summed
3	BlackRock, Inc. 13F CIK 2012383 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	7,146,590	4.00%	+422,583	Jun 30, 2026	carried, not yet filed for the newest quarter
3.1	iShares Russell 2000 ETF Fund S000004344 · Registered fund · Jun 30, 2026 iShares Trust, not summed	2,442,459	1.37%	+136,397	Jun 30, 2026	iShares Trust, not summed
3.2	iShares Russell 2000 Value ETF Fund S000004342 · Registered fund · Jun 30, 2026 iShares Trust, not summed	888,234	0.50%	+74,116	Jun 30, 2026	iShares Trust, not summed
3.3	iShares Micro-Cap ETF Fund S000004439 · Registered fund · Jun 30, 2026 iShares Trust, not summed	315,539	0.18%	+78,840	Jun 30, 2026	iShares Trust, not summed
3.4	iShares Core S&P Total U.S. Stock Market ETF Fund S000004317 · Registered fund · Jun 30, 2026 iShares Trust, not summed	204,117	0.11%	+4,896	Jun 30, 2026	iShares Trust, not summed
3.5	Master Small Cap Index Series Fund S000002716 · Registered fund · Jun 30, 2026 Quantitative Master Series LLC, not summed	156,409	0.09%	0	Jun 30, 2026	Quantitative Master Series LLC, not summed
4	DIMENSIONAL FUND ADVISORS LP 13F CIK 354204 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	6,286,323	3.52%	-64,787	Jun 30, 2026	carried, not yet filed for the newest quarter
4.1	U.S. SMALL CAP VALUE PORTFOLIO Fund S000000987 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	1,256,777	0.70%	+263,135	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
4.2	U.S. SMALL CAP PORTFOLIO Fund S000000971 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	777,218	0.43%	+76,163	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
4.3	Dimensional US Small Cap Value ETF Fund S000075151 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	620,402	0.35%	+233,765	Jul 31, 2026	Dimensional ETF Trust, not summed
4.4	Dimensional U.S. Small Cap ETF Fund S000070906 · Registered fund · Jul 31, 2026 Dimensional ETF Trust, not summed	555,980	0.31%	-9,325	Jul 31, 2026	Dimensional ETF Trust, not summed
4.5	U.S. MICRO CAP PORTFOLIO Fund S000000948 · Registered fund · Jul 31, 2026 DFA INVESTMENT DIMENSIONS GROUP INC, not summed	537,371	0.30%	+87,205	Jul 31, 2026	DFA INVESTMENT DIMENSIONS GROUP INC, not summed
5	ROYCE & ASSOCIATES LP 13F CIK 906304 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	5,090,927	2.85%	+211,186	Jun 30, 2026	carried, not yet filed for the newest quarter
5.1	Royce Small-Cap Opportunity Fund Fund S000009512 · Registered fund · Jun 30, 2026 ROYCE FUND, not summed	1,516,867	0.85%	-229,686	Jun 30, 2026	ROYCE FUND, not summed
5.2	Royce Micro-Cap Fund Fund S000009506 · Registered fund · Jun 30, 2026 ROYCE FUND, not summed	519,069	0.29%	+81,598	Jun 30, 2026	ROYCE FUND, not summed
5.3	Royce Capital Fund - Micro-Cap Portfolio Fund S000009496 · Registered fund · Jun 30, 2026 ROYCE CAPITAL FUND, not summed	172,101	0.10%	+34,476	Jun 30, 2026	ROYCE CAPITAL FUND, not summed
6	VANGUARD CAPITAL MANAGEMENT LLC 13F CIK 2100119 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,925,626	2.20%	-290,833	Jun 30, 2026	carried, not yet filed for the newest quarter
7	VANGUARD PORTFOLIO MANAGEMENT LLC 13F CIK 2100121 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,513,067	1.96%	+177,402	Jun 30, 2026	carried, not yet filed for the newest quarter
8	PARADIGM CAPITAL MANAGEMENT INC/NY 13F CIK 1037792 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	3,036,398	1.70%	-4,999,937	Jun 30, 2026	carried, not yet filed for the newest quarter
9	McClelland Bruce William Insider CIK 1424201 · May 15, 2026 Director, President & CEO, issuer-wide	2,909,454	1.63%	+1,393,290	May 15, 2026	Director, President & CEO, issuer-wide
10	VANGUARD TOTAL STOCK MARKET INDEX FUND Fund S000002848 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	2,800,400	1.57%	-267,900	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
11	VANGUARD INFORMATION TECHNOLOGY INDEX FUND Fund S000004452 · Registered fund · May 31, 2026 VANGUARD WORLD FUND, not summed	2,492,416	1.39%	+50,364	May 31, 2026	VANGUARD WORLD FUND, not summed
12	GEODE CAPITAL MANAGEMENT, LLC 13F CIK 1214717 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,485,064	1.39%	+70,504	Jun 30, 2026	carried, not yet filed for the newest quarter
13	Connor, Clark & Lunn Investment Management Ltd. 13F CIK 1596800 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	2,213,134	1.24%	+123,412	Jun 30, 2026	carried, not yet filed for the newest quarter
14	STATE STREET CORP 13F CIK 93751 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	1,930,153	1.08%	+20,126	Jun 30, 2026	carried, not yet filed for the newest quarter
14.1	STATE STREET SMALL/MID CAP EQUITY INDEX PORTFOLIO Fund S000050332 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	33,700	0.02%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
14.2	State Street Total Return V.I.S. Fund Fund S000001637 · Registered fund · Jun 30, 2026 STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed	2,228	0.00%	0	Jun 30, 2026	STATE STREET VARIABLE INSURANCE SERIES FUNDS INC, not summed
14.3	State Street Balanced Index Fund Fund S000082802 · Registered fund · Jun 30, 2026 STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed	775	0.00%	0	Jun 30, 2026	STATE STREET INSTITUTIONAL INVESTMENT TRUST, not summed
15	D. E. Shaw & Co., Inc. 13F CIK 1009207 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,790,375	1.00%	+251,903	Jun 30, 2026	carried, not yet filed for the newest quarter
16	ACADIAN ASSET MANAGEMENT LLC 13F CIK 916542 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	1,768,227	0.99%	+329,737	Jun 30, 2026	carried, not yet filed for the newest quarter
17	AQR CAPITAL MANAGEMENT LLC 13F CIK 1167557 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,409,795	0.79%	+152,448	Jun 30, 2026	carried, not yet filed for the newest quarter
17.1	AQR Small Cap Multi-Style Fund Fund S000040064 · Registered fund · Jun 30, 2026 AQR Funds, not summed	41,943	0.02%	—	Jun 30, 2026	AQR Funds, not summed
18	FIRST WILSHIRE SECURITIES MANAGEMENT INC 13F CIK 732847 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,404,493	0.79%	-2,685	Jun 30, 2026	carried, not yet filed for the newest quarter
19	CITADEL ADVISORS LLC 13F CIK 1423053 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,241,200	0.69%	+666,211	Jun 30, 2026	carried, not yet filed for the newest quarter
20	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 13F CIK 1164508 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	1,215,230	0.68%	-1,646	Jun 30, 2026	carried, not yet filed for the newest quarter
21	ROYCE MICRO-CAP TRUST, INC. Fund · Registered fund · Jun 30, 2026 ROYCE MICRO-CAP TRUST, INC., not summed	1,172,279	0.66%	—	Jun 30, 2026	ROYCE MICRO-CAP TRUST, INC., not summed
21.1	Guggenheim Active Allocation Fund Fund · Registered fund · May 29, 2026 Guggenheim Active Allocation Fund, not summed	419	0.00%	—	May 29, 2026	Guggenheim Active Allocation Fund, not summed
22	VANGUARD EXTENDED MARKET INDEX FUND Fund S000002841 · Registered fund · Jun 30, 2026 VANGUARD INDEX FUNDS, not summed	1,030,468	0.58%	+23,955	Jun 30, 2026	VANGUARD INDEX FUNDS, not summed
23	Column Small Cap Select Fund Fund S000082920 · Registered fund · Aug 31, 2026 Trust for Professional Managers, not summed	892,993	0.50%	0	Aug 31, 2026	Trust for Professional Managers, not summed
24	GRAYSON BRUNS H Insider CIK 1204899 · Oct 15, 2026 Director, issuer-wide	859,446	0.48%	+19,176	Oct 15, 2026	Director, issuer-wide
25	MARSHALL WACE, LLP 13F CIK 1318757 · Exempt reporting adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	814,132	0.46%	+44,345	Jun 30, 2026	carried, not yet filed for the newest quarter
26	CHARLES SCHWAB INVESTMENT MANAGEMENT INC 13F CIK 884546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	800,159	0.45%	+91,996	Jun 30, 2026	carried, not yet filed for the newest quarter
26.1	Schwab U.S. Small-Cap ETF Fund S000026636 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	441,040	0.25%	-6,976	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
26.2	Schwab Small-Cap Index Fund Fund S000005912 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	227,701	0.13%	+21,040	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
26.3	Schwab Total Stock Market Index Fund Fund S000005913 · Registered fund · Jul 31, 2026 SCHWAB CAPITAL TRUST, not summed	78,320	0.04%	+40,065	Jul 31, 2026	SCHWAB CAPITAL TRUST, not summed
26.4	Schwab U.S. Broad Market ETF Fund S000026631 · Registered fund · May 31, 2026 SCHWAB STRATEGIC TRUST, not summed	52,315	0.03%	+479	May 31, 2026	SCHWAB STRATEGIC TRUST, not summed
27	NORTHERN TRUST CORP 13F CIK 73124 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	749,823	0.42%	+43,965	Jun 30, 2026	carried, not yet filed for the newest quarter
27.1	Small Cap Index Fund Fund S000001245 · Registered fund · Jun 30, 2026 Northern Funds, not summed	43,541	0.02%	+5,610	Jun 30, 2026	Northern Funds, not summed
27.2	Small Cap Core Fund Fund S000001244 · Registered fund · Jun 30, 2026 Northern Funds, not summed	3,698	0.00%	0	Jun 30, 2026	Northern Funds, not summed
28	MILLENNIUM MANAGEMENT LLC 13F CIK 1273087 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	698,458	0.39%	+207,138	Jun 30, 2026	carried, not yet filed for the newest quarter
29	VANGUARD FIDUCIARY TRUST CO 13F CIK 933478 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	612,773	0.34%	+25,344	Jun 30, 2026	carried, not yet filed for the newest quarter
30	Bucci Sam Insider CIK 1824854 · May 15, 2026 EVP & COO, issuer-wide	599,271	0.34%	+150,460	May 15, 2026	EVP & COO, issuer-wide
31	JACOBS LEVY EQUITY MANAGEMENT, INC 13F CIK 884414 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	582,093	0.33%	-103,217	Jun 30, 2026	carried, not yet filed for the newest quarter
32	Marmurek Eric S Insider CIK 1720721 · Oct 15, 2026 SVP, Deputy CFO and CAO, issuer-wide	566,450	0.32%	+22,744	Oct 15, 2026	SVP, Deputy CFO and CAO, issuer-wide
33	VANGUARD RUSSELL 2000 INDEX FUND Fund S000030003 · Registered fund · May 31, 2026 VANGUARD SCOTTSDALE FUNDS, not summed	482,936	0.27%	+19,870	May 31, 2026	VANGUARD SCOTTSDALE FUNDS, not summed
34	Macken Patrick W Insider CIK 1641965 · May 15, 2026 EVP, CLO & Secretary, issuer-wide	482,146	0.27%	+138,600	May 15, 2026	EVP, CLO & Secretary, issuer-wide
35	VICTORY CAPITAL MANAGEMENT INC 13F CIK 1040188 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	456,421	0.26%	+34,070	Jun 30, 2026	carried, not yet filed for the newest quarter
35.1	Victory Integrity Discovery Fund Fund S000046401 · Registered fund · Jun 30, 2026 Victory Portfolios, not summed	247,500	0.14%	+28,345	Jun 30, 2026	Victory Portfolios, not summed
35.2	Victory Extended Market Index Fund Fund S000012941 · Registered fund · Jul 31, 2026 Victory Portfolios III, not summed	16,421	0.01%	+75	Jul 31, 2026	Victory Portfolios III, not summed
36	SHANI SHAUL Insider CIK 939974 · Oct 15, 2026 Director, issuer-wide	438,553	0.25%	+200,835	Oct 15, 2026	Director, issuer-wide
37	GOLDMAN SACHS GROUP INC 13F CIK 886982 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	415,430	0.23%	-329,315	Jun 30, 2026	carried, not yet filed for the newest quarter
37.1	Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF Fund S000048296 · Registered fund · May 31, 2026 Goldman Sachs ETF Trust, not summed	118,668	0.07%	+1,578	May 31, 2026	Goldman Sachs ETF Trust, not summed
37.2	Goldman Sachs Absolute Return Tracker Fund Fund S000020314 · Registered fund · Jun 30, 2026 GOLDMAN SACHS TRUST, not summed	4,244	0.00%	-2,687	Jun 30, 2026	GOLDMAN SACHS TRUST, not summed
38	Silverberg Bernstein Capital Management LLC 13F CIK 2007880 · Registered investment adviser · Sep 30, 2026	412,223	0.23%	-6,600	Sep 30, 2026
39	INFANTE BEATRIZ V Insider CIK 1193369 · Jun 16, 2026 Director, issuer-wide	385,724	0.22%	+42,500	Jun 16, 2026	Director, issuer-wide
40	Russell Investments Group, Ltd. 13F CIK 1692234 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	385,226	0.22%	+33,353	Jun 30, 2026	carried, not yet filed for the newest quarter
40.1	U.S. Small Cap Equity Fund Fund S000001586 · Registered fund · Jul 31, 2026 RUSSELL INVESTMENT CO, not summed	11,000	0.01%	-2,382	Jul 31, 2026	RUSSELL INVESTMENT CO, not summed
41	Bank of New York Mellon Corp 13F CIK 1390777 · Bank · Jun 30, 2026 carried, not yet filed for the newest quarter	379,800	0.21%	+2,436	Jun 30, 2026	carried, not yet filed for the newest quarter
42	MORGAN STANLEY 13F CIK 895421 · Holding company · Jun 30, 2026 carried, not yet filed for the newest quarter	379,790	0.21%	-43,675	Jun 30, 2026	carried, not yet filed for the newest quarter
42.1	E*TRADE No Fee Total Market Index Fund Fund S000090722 · Registered fund · Jul 31, 2026 E Trade Trust, not summed	99	0.00%	0	Jul 31, 2026	E Trade Trust, not summed
43	VANGUARD STRATEGIC SMALL-CAP EQUITY FUND Fund S000012432 · Registered fund · Jun 30, 2026 VANGUARD HORIZON FUNDS, not summed	363,828	0.20%	0	Jun 30, 2026	VANGUARD HORIZON FUNDS, not summed
44	Morgan Stanley Pathway Small-Mid Cap Equity ETF Fund S000088120 · Registered fund · May 31, 2026 MORGAN STANLEY PATHWAY FUNDS, not summed	342,976	0.19%	-17,562	May 31, 2026	MORGAN STANLEY PATHWAY FUNDS, not summed
45	XTX Topco Ltd 13F CIK 1828301 · Unknown · Jun 30, 2026 carried, not yet filed for the newest quarter	323,307	0.18%	+162,365	Jun 30, 2026	carried, not yet filed for the newest quarter
46	BNP PARIBAS ASSET MANAGEMENT Holding S.A. 13F CIK 1520354 · Non-US institution · Jun 30, 2026 carried, not yet filed for the newest quarter	303,599	0.17%	+303,599	Jun 30, 2026	carried, not yet filed for the newest quarter
47	Pacific Ridge Capital Partners, LLC 13F CIK 1591546 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	286,213	0.16%	+40,037	Jun 30, 2026	carried, not yet filed for the newest quarter
48	COMMONWEALTH EQUITY SERVICES, LLC 13F CIK 312272 · Registered investment adviser · Jun 30, 2026 carried, not yet filed for the newest quarter	284,723	0.16%	0	Jun 30, 2026	carried, not yet filed for the newest quarter
49	EWING R STEWART JR Insider CIK 1202822 · Jun 16, 2026 Director, issuer-wide	239,891	0.13%	+42,500	Jun 16, 2026	Director, issuer-wide
50	Tamone Tanya Insider CIK 1815375 · Jun 16, 2026 Director, issuer-wide	223,300	0.12%	+42,500	Jun 16, 2026	Director, issuer-wide

20 more nested rows are not shown here; Every filing lists them all.

Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.

Showing 1–50 of 254 holders

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Key facts CIK 1708055 CUSIP 762544104 13F (30d) 21 filings 21 filers Visit website Investor relations