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 company filings.

Institutional ownership of RBBN from SEC Form 13F filings across 160 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, 160 institutions disclosed 128.3M shares of Ribbon Communications Inc. worth $289.8M — about 72.4% of shares outstanding; the largest disclosed holder is JPMORGAN CHASE & CO. Source: SEC Form 13F filings, parsed by EvidInvest.

160

13F holders

$289.8M

value, 2026 filers

72.4%

of shares outstanding (128.3M 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	DIMENSIONAL FUND ADVISORS LP	6.3M	$14.7M	0.0%	3.5%	-1.0%
5	ROYCE & ASSOCIATES LP	5.1M	$11.9M	0.1%	2.9%	+4.3%
6	VANGUARD CAPITAL MANAGEMENT LLC	3.9M	$9.2M	0.0%	2.2%	-6.9%
7	VANGUARD PORTFOLIO MANAGEMENT LLC	3.5M	$8.2M	0.0%	2%	+5.3%
8	PARADIGM CAPITAL MANAGEMENT INC/NY	3.0M	$7.1M	0.2%	1.7%	-62.2%
9	GEODE CAPITAL MANAGEMENT, LLC	2.5M	$5.8M	0.0%	1.4%	+2.9%
10	Connor, Clark & Lunn Investment Management Ltd.	2.2M	$5.2M	0.0%	1.2%	+5.9%
11	STATE STREET CORP	1.9M	$4.5M	0.0%	1.1%	+1.1%
12	D. E. Shaw & Co., Inc.	1.8M	$4.2M	0.0%	1%	+16.4%
13	ACADIAN ASSET MANAGEMENT LLC	1.8M	$4.1M	0.0%	1%	+22.9%
14	AQR CAPITAL MANAGEMENT LLC	1.4M	$3.3M	0.0%	0.8%	+12.1%
15	FIRST WILSHIRE SECURITIES MANAGEMENT INC	1.4M	$3.3M	0.7%	0.8%	-0.2%
16	CITADEL ADVISORS LLC	1.2M	$2.9M	0.0%	0.7%	+115.9%
17	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	1.2M	$2.8M	0.0%	0.7%	-0.1%
18	MARSHALL WACE, LLP	814,132	$1.9M	0.0%	0.5%	+5.8%
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	800,159	$1.9M	0.0%	0.5%	+13.0%
20	NORTHERN TRUST CORP	749,823	$1.8M	0.0%	0.4%	+6.2%
21	MILLENNIUM MANAGEMENT LLC	698,458	$1.6M	0.0%	0.4%	+42.2%
22	VANGUARD FIDUCIARY TRUST CO	612,773	$1.4M	0.0%	0.3%	+4.3%
23	JACOBS LEVY EQUITY MANAGEMENT, INC	582,093	$1.4M	0.0%	0.3%	-15.1%
24	VICTORY CAPITAL MANAGEMENT INC	456,421	$1.1M	0.0%	0.3%	+8.1%
25	Silverberg Bernstein Capital Management LLC	418,823	$980,046	0.4%	0.2%	-4.4%

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.