Ribbon Communications Inc.

RBBNNASDAQ

$1.70-0.07 (-3.95% today)

Legend

Insider buy

Insider sell

Congress buy

Congress sell

Hedge Funds
bought vs soldGreener markers show more buyers; redder markers show more sellers.

Company share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size.

Insider buy
Insider sell
Congress buy
Congress sell
Hedge Funds bought vs sold

Share activityNet buybacksNo changeNet dilution

Marker size reflects transaction size. Greener fund markers mean more buyers.

Insider Buy
Insider Sell
Congress Buy
Congress Sell
Hedge funds bought vs sold
BuybackNo changeNet dilution

Ribbon Communications Inc. price and activity chart data

Showing the 1Y range: Oct 6, 2025 to Oct 5, 2026. Price (-55.7%). 0 insider or congressional trades plotted in this window as 0 markers; nearby trades of the same kind are grouped.

Transactions plotted on the price chart
Date	Category	Person	Role	Action	Amount	Change in holding

Largest institutional holders

13F · Q2 2026

Fund	% of company held	Value	% of portfolio	Quarterly activity
JPMorgan Chase & Co	29.11%	$116M	0.01%	Not reported
Neuberger Berman Group LLC	10.24%	$38.7M	0.03%	Not reported
BlackRock, Inc.	4.00%	$16.7M	0.00%	Not reported
Dimensional Fund Advisors LP	3.52%	$14.7M	0.00%	Not reported
Royce & Associates LP	2.85%	$11.9M	0.10%	Not reported
Vanguard Capital Management LLC	2.20%	$9.19M	0.00%	Not reported
Vanguard Portfolio Management LLC	1.97%	$8.22M	0.00%	Not reported
Paradigm Capital Management Inc	1.70%	$7.11M	0.19%	Reduce 62.22%
Geode Capital Management, LLC	1.39%	$5.82M	0.00%	Not reported
State Street Corp	1.08%	$4.52M	0.00%	Not reported
D. E. Shaw & Co., Inc.	1.00%	$4.19M	0.00%	Not reported
Acadian Asset Management LLC	0.99%	$4.13M	0.00%	Not reported
AQR Capital Management LLC	0.79%	$3.3M	0.00%	Not reported
First Wilshire Securities Management Inc	0.79%	$3.29M	0.68%	Reduce 0.19%
Citadel Advisors LLC	0.69%	$2.9M	0.00%	Not reported
Arrowstreet Capital, Limited Partnership	0.68%	$2.84M	0.00%	Not reported
Marshall Wace, LLP	0.46%	$1.91M	0.00%	Not reported
Charles Schwab Investment Management Inc	0.45%	$1.87M	0.00%	Not reported
Northern Trust Corp	0.42%	$1.75M	0.00%	Not reported
Millennium Management LLC	0.39%	$1.63M	0.00%	Not reported
Vanguard Fiduciary Trust Co	0.34%	$1.43M	0.00%	Not reported
Jacobs Levy Equity Management, Inc	0.33%	$1.36M	0.00%	Not reported
Victory Capital Management Inc	0.26%	$1.07M	0.00%	Not reported
Silverberg Bernstein Capital Management LLC	0.23%	$980K	0.38%	Reduce 4.41%
Goldman Sachs Group Inc	0.23%	$972K	0.00%	Not reported
Russell Investments Group, Ltd.	0.22%	$901K	0.00%	Not reported
Bank of New York Mellon Corp	0.21%	$889K	0.00%	Not reported
Morgan Stanley	0.21%	$889K	0.00%	Not reported
XTX Topco Ltd	0.18%	$757K	0.01%	Not reported
BNP PARIBAS ASSET MANAGEMENT Holding S.A.	0.17%	$710K	0.00%	Not reported
Pacific Ridge Capital Partners, LLC	0.16%	$670K	0.12%	Add 16.26%
Commonwealth Equity Services, LLC	0.16%	$666K	0.00%	Not reported
Voya Investment Management LLC	0.12%	$503K	0.00%	Not reported
American Century Companies Inc	0.12%	$494K	0.00%	Not reported
Squarepoint Ops LLC	0.11%	$448K	0.00%	Not reported
Bank of America Corp	0.11%	$441K	0.00%	Not reported
Nuveen, LLC	0.10%	$415K	0.00%	Not reported
Gsa Capital Partners LLP	0.10%	$407K	0.03%	Not reported
EntryPoint Capital, LLC	0.10%	$405K	0.10%	Add 23.22%
ExodusPoint Capital Management, LP	0.10%	$404K	0.00%	Not reported
UBS Group AG	0.09%	$387K	0.00%	Not reported
Invesco Ltd.	0.09%	$381K	0.00%	Not reported
WINTON GROUP Ltd	0.08%	$350K	0.01%	Not reported
Alliancebernstein L.P.	0.08%	$293K	0.00%	Not reported
Qube Research & Technologies Ltd	0.08%	$323K	0.00%	Not reported
LSV Asset Management	0.08%	$318K	0.00%	Not reported
Vanguard Global Advisers, LLC	0.07%	$295K	0.00%	Not reported
Rhumbline Advisers	0.07%	$295K	0.00%	Not reported
Dynamic Technology Lab Private Ltd	0.06%	$245K	0.05%	Not reported
Ameriprise Financial Inc	0.06%	$242K	0.00%	Not reported

50 of 152 holders

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