Ribbon Communications Inc.

RBBN • NASDAQ

Ribbon Communications Inc. is a telecommunications services company in the communication services sector on NASDAQ, led by Dan Redington, with a market cap of $526.3M. As of Q3 2025, 72% of shares are held by 150 institutional investors, with JPMORGAN CHASE & CO as the largest holder at 29.39%.

Executive Vice President, Global SalesDan Redington

Market Cap$526.3M

Telecommunications Services

Communication Services

Employees3.1K

Websiteribboncommunications.com

Country

United States of America

Overview

Overview of institutional ownership in RBBN as of Q3 2025 with a market cap of $672.9M

All Institutions

Institutions: 150
Value Held: $487.6M
Shares Held: 129.6M
Avg Position: $3.3M
Median Position: $132.4K

Hedge Funds

Hedge Funds: 13
Value Held: $10.2M
Shares Held: 2.7M
Avg Position: $783.5K
Median Position: $211.1K

Ownership Breakdown

Institutional (non-HF)

70.95%

$477.4M

Hedge Funds

1.51%

$10.2M

Retail & Other

27.54%

$185.3M

Based on market cap of $672.9M as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in RBBN as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
JPMORGAN CHASE & CO Institution	Jamie Dimon CEO	$197.7M 0.01% of portfolio	29.39% 52.0M shares	≤ Q2 2013 Held for 12y 5m+	$1.56T
N Neuberger Berman Group LLC Institution	-	$64.5M 0.05% of portfolio	10.31% 18.3M shares	Q2 2015 Held for 10y 5m	$136.94B
PARADIGM CAPITAL MANAGEMENT INC/NY Long Only Manager	Candace King Weir CEO	$33.2M 1.44% of portfolio	4.94% 8.7M shares	≤ Q2 2013 Held for 12y 5m+	$2.3B
B BlackRock, Inc. Institution	-	$29.3M 0.00% of portfolio	4.35% 7.7M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
VANGUARD GROUP INC Institution	Salim Ramji CEO	$29.2M 0.00% of portfolio	4.34% 7.7M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
DIMENSIONAL FUND ADVISORS LP Long Only Manager	David Paul Butler CEO	$24.9M 0.01% of portfolio	3.70% 6.5M shares	≤ Q2 2013 Held for 12y 5m+	$466.32B
R ROYCE & ASSOCIATES LLC Institution	-	$16.4M 0.16% of portfolio	2.43% 4.3M shares	Q1 2023 Held for 2y 8m	$10.0B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$8.8M 0.00% of portfolio	1.30% 2.3M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$8.0M 0.00% of portfolio	1.18% 2.1M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	John Wyatt Ricketts President	$7.1M 0.02% of portfolio	1.05% 1.9M shares	Q2 2022 Held for 3y 5m	$31.7B

Net Capital Flow

Institutional buying and selling activity for RBBN in Q3 2025

Traded: +$5.5M
Buyers: 74
Sellers: 59
Total Bought: +$18.0M
Total Sold: −$12.6M
Avg Position: $2.9M

Biggest Buyers

Institution	Net Bought	Current Position
R ROYCE & ASSOCIATES LLC Institution	+$2.4M +633.0K shares	$16.4M 4.3M shares
Cinctive Capital Management LP Hedge Fund•Multi-Strategy	+$2.0M +524.1K shares	$2.0M 524.1K shares
ARROWSTREET CAPITAL LIMITED PARTNERSHIP Hedge Fund•Quant	+$1.8M +481.3K shares	$3.7M 964.4K shares
Connor, Clark & Lunn Investment Management Ltd. Long Only Manager	+$1.5M +389.1K shares	$7.1M 1.9M shares
Marshall Wace LLP Institution	+$1.3M +346.1K shares	$1.3M 346.1K shares
MORGAN STANLEY RIA/Wealth	+$941.3K +247.7K shares	$1.9M 504.7K shares
LAZARD ASSET MANAGEMENT LLC Long Only Manager	+$794.0K +209.0K shares	$794.0K 209.0K shares
GOLDMAN SACHS GROUP INC Institution	+$689.5K +181.4K shares	$1.6M 424.2K shares
D D. E. Shaw & Co., Inc. Institution	+$654.4K +172.2K shares	$2.2M 588.9K shares
VANGUARD GROUP INC Institution	+$633.4K +166.7K shares	$29.2M 7.7M shares

Biggest Sellers

Institution	Net Sold	Current Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$3.3M −830.1K shares	Sold Off 0 shares
FRANKLIN RESOURCES INC Institution	−$1.9M −493.1K shares	$2.3M 597.7K shares
N Neuberger Berman Group LLC Institution	−$735.0K −207.9K shares	$64.5M 18.3M shares
UBS GLOBAL ASSET MANAGEMENT AMERICAS INC Long Only Manager	−$579.4K −152.5K shares	$829.9K 218.4K shares
O OPTIONS SOLUTIONS, LLC Hedge Fund•Sector	−$523.4K −130.2K shares	Sold Off 0 shares
VICTORY CAPITAL MANAGEMENT INC Long Only Manager	−$518.9K −136.6K shares	$1.3M 354.6K shares
Verition Fund Management LLC Hedge Fund•Multi-Strategy	−$466.9K −116.4K shares	Sold Off 0 shares
WHITE PINE CAPITAL LLC RIA/Wealth	−$449.1K −118.2K shares	$1.1M 300.8K shares
UBS Group AG Institution	−$408.1K −107.4K shares	$613.7K 161.5K shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	−$400.8K −105.5K shares	$42.6K 11.2K shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited RBBN in Q3 2025

New Positions: 12
New Value: $3.2M
Exited Positions: 16
Exited Value: $5.3M

New Positions

Institution	Position Value
Cinctive Capital Management LP Hedge Fund•Multi-Strategy	$2.0M 524.1K shares
L LSV ASSET MANAGEMENT Long Only Manager	$516.0K 135.8K shares
Round Rock Advisors, LLC RIA/Wealth	$256.1K 74.2K shares
E EntryPoint Capital, LLC Hedge Fund•Long/Short	$122.8K 32.3K shares
Trilogy Capital Inc. RIA/Wealth	$94.4K 24.9K shares
Goss Wealth Management LLC RIA/Wealth	$68.0K 17.9K shares
Empowered Funds, LLC ETF Provider	$55.1K 14.5K shares
Schonfeld Strategic Advisors LLC Hedge Fund•Multi-Strategy	$41.1K 10.8K shares
S State of Alaska, Department of Revenue Institution	$29.5K 7.8K shares
Farther Finance Advisors, LLC RIA/Wealth	$17.3K 4.5K shares

Exited Positions

Institution	Previous Position
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$3.3M 830.1K shares
O OPTIONS SOLUTIONS, LLC Hedge Fund•Sector	$523.4K 130.2K shares
Verition Fund Management LLC Hedge Fund•Multi-Strategy	$466.9K 116.4K shares
Worth Venture Partners, LLC Fund of Funds	$222.8K 55.6K shares
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$186.4K 46.5K shares
A AXA Institution	$147.4K 36.8K shares
P Polymer Capital Management LLC Hedge Fund•Multi-Strategy	$69.8K 17.4K shares
J Jump Financial, LLC Institution	$67.3K 16.8K shares
T TIAA TRUST, NATIONAL ASSOCIATION Institution	$60.2K 15.0K shares
Almanack Investment Partners, LLC. RIA/Wealth	$58.3K 14.6K shares

Options Activity

Institutions with the largest Call and Put options positions in RBBN as of Q3 2025

Call Positions: 2
Call Value: $604.2K
Put Positions: 0
Put Value: -

Call Positions

Institution	Position Value
UBS Group AG Institution	$537.3K 1.4K contracts
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$66.9K 176.0 contracts

Put Positions

Institution	Position Value
No put positions found

Most Committed Institutions

Institutions with RBBN as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
PARADIGM CAPITAL MANAGEMENT INC/NY Long Only Manager	Candace King Weir CEO	1.44% $33.2M	4.94% 8.7M shares	≤ Q2 2013 Held for 12y 5m+	$2.3B
FIRST WILSHIRE SECURITIES MANAGEMENT INC RIA/Wealth	Howard Haoming Lu CEO	1.32% $5.0M	0.74% 1.3M shares	Q4 2021 Held for 3y 11m	$375.8M
S Silverberg Bernstein Capital Management LLC RIA/Wealth	Irwin Warren Silverberg Managing Partner	1.00% $1.6M	0.24% 428.0K shares	Q4 2023 Held for 1y 11m	$163.4M
H Herald Investment Management Ltd Institution	-	0.47% $3.5M	0.52% 912.9K shares	Q2 2019 Held for 6y 5m	$745.8M
WHITE PINE CAPITAL LLC RIA/Wealth	Michael Scott Wallace President	0.33% $1.1M	0.17% 300.8K shares	Q4 2022 Held for 2y 11m	$349.2M
Pacific Ridge Capital Partners, LLC Long Only Manager	Mark Daniel Cooper President	0.19% $894.3K	0.13% 235.3K shares	Q4 2017 Held for 7y 11m	$460.6M
R ROYCE & ASSOCIATES LLC Institution	-	0.16% $16.4M	2.43% 4.3M shares	Q1 2023 Held for 2y 8m	$10.0B
Cinctive Capital Management LP Hedge Fund•Multi-Strategy	Lawrence Joseph Sapanski Founder	0.10% $2.0M	0.30% 524.1K shares	Q3 2025 Held for 2 months	$2.0B
GSA CAPITAL PARTNERS LLP Hedge Fund•Quant	David Khabie-Zeitoune CEO	0.07% $821.9K	0.12% 216.3K shares	Q3 2021 Held for 4y 2m	$1.1B
E EntryPoint Capital, LLC Hedge Fund•Long/Short	Lawrence Edward Leibowitz CEO	0.05% $122.8K	0.02% 32.3K shares	Q3 2025 Held for 2 months	$258.4M

Hedge Fund Spotlight

Discover hedge funds investing in RBBN

AQR CAPITAL MANAGEMENT LLC

Hedge Fund • Multi-Strategy

Portfolio ManagerDavid Gary Kabiller

Portfolio Value: $156.17B
Positions: 3,453
Last Reported: Q3 2025

Sector Allocation

Position in Ribbon Communications Inc.

Market Value: $642.6K
Shares Held: 169.1K
Portfolio Weight: 0.00%
Owned Since: 2025-Q1

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