Who owns RBBNWhat RBBN owns — n/a

Who owns Ribbon Communications Inc.?

Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from SEC filings.

Institutional ownership of RBBN from SEC Form 13F filings across 118 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.

As of the 2026-06-30 reporting period, 118 institutions disclosed 109.9M shares of Ribbon Communications Inc. worth $242.2M — about 62% of shares outstanding; the largest disclosed holder is JPMORGAN CHASE & CO. Source: SEC Form 13F filings, parsed by EvidInvest.

118

13F holders

$242.2M

value, 2026 filers

62%

of shares outstanding (109.9M sh)

new positions (2026 filers)

Top institutional holders

ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of RBBN's shares outstanding

#	Manager	Shares	Value	% of fund	% of co.	Δ shares QoQ
1	JPMORGAN CHASE & CO	52.0M	$115.5M	0.0%	29.4%	0.0%
2	NEUBERGER BERMAN GROUP LLC	18.3M	$38.7M	0.0%	10.3%	+5.5%
3	BlackRock, Inc.	7.1M	$16.7M	0.0%	4%	+6.3%
4	VANGUARD CAPITAL MANAGEMENT LLC	3.9M	$9.2M	0.0%	2.2%	-53.4%
5	VANGUARD PORTFOLIO MANAGEMENT LLC	3.5M	$8.2M	0.0%	2%	+5.3%
6	PARADIGM CAPITAL MANAGEMENT INC/NY	3.0M	$7.1M	0.2%	1.7%	-62.2%
7	GEODE CAPITAL MANAGEMENT, LLC	2.5M	$5.8M	0.0%	1.4%	+2.9%
8	Connor, Clark & Lunn Investment Management Ltd.	2.2M	$5.2M	0.0%	1.2%	+5.9%
9	D. E. Shaw & Co., Inc.	1.8M	$4.2M	0.0%	1%	+16.4%
10	ACADIAN ASSET MANAGEMENT LLC	1.8M	$4,132	0.0%	1%	+22.9%
11	CITADEL ADVISORS LLC	1.2M	$2.9M	0.0%	0.7%	+115.9%
12	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1.2M	$2.8M	0.0%	0.7%	-0.1%
13	MARSHALL WACE, LLP	814,132	$1.9M	0.0%	0.5%	+5.8%
14	Sixth Street Partners Management Company, L.P.NEW	800,159	$1.9M	0.3%	0.5%	new
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	800,159	$1.9M	0.0%	0.5%	+13.0%
16	NORTHERN TRUST CORP	749,823	$1.8M	0.0%	0.4%	+6.2%
17	MILLENNIUM MANAGEMENT LLC	698,458	$1.6M	0.0%	0.4%	+42.2%
18	VANGUARD FIDUCIARY TRUST CO	612,773	$1.4M	0.0%	0.3%	+4.3%
19	VICTORY CAPITAL MANAGEMENT INC	456,421	$1.1M	0.0%	0.3%	+8.1%
20	GOLDMAN SACHS GROUP INC	415,430	$972,106	0.0%	0.2%	-44.2%
21	Russell Investments Group, Ltd.	385,226	$901,427	0.0%	0.2%	+9.5%
22	Bank of New York Mellon Corp	379,800	$888,731	0.0%	0.2%	+0.6%
23	MORGAN STANLEY	379,790	$888,711	0.0%	0.2%	-10.3%
24	BNP PARIBAS ASSET MANAGEMENT Holding S.A.NEW	303,599	$710,422	0.0%	0.2%	new
25	COMMONWEALTH EQUITY SERVICES, LLC	284,723	$666,250	0.0%	0.2%	0.0%

Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.