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$RBBN
$1.63 +$0.23 (16.43%) Close

Ownership

13F as of Q2 2026 · 179.2M shares outstanding

Who owns RBBN?

By type of holder
Institutions 71.5% Insiders 28.5% Everyone else 0.0%
Concentration Top 10 holders own 58.5%
Jpmorgan Chase & Co 29.1% · Neuberger Berman Group LLC 10.2%
Institutional ownership
71.5%
-0.6 pts vs last qtr
Institutional holders
157
+7 vs last qtr
Net shares bought
−1.1M
by institutions in Q2 2026
New / sold out
23 / 16
positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026
  • Neuberger Berman Group LLC +949.1K
  • Citadel Advisors LLC +666.2K

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Biggest sellers in Q2 2026
  • Paradigm Capital Management Inc/ny −5.0M
  • Goldman Sachs Group Inc −329.3K

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Who is planning to sell?

No insider has filed a notice of proposed sale (Form 144) for Ribbon Communications Inc. in the last 12 months.

Is your stake being diluted?

Diluted share count, FY2016–FY2025
+264.1%
+15.44% a year
Each share's claim on the business
−72.5%
shrank without buying or selling a share
Spent on buybacks vs paid in stock
$23.1M vs $178M
over 10 fiscal years
Diluted shares, split-adjusted
47.9M114.8M181.6M2016: 49.4M shares'162017: 58.8M shares'172018: 103.9M shares'182019: 109.7M shares'192020: 144.7M shares'202021: 147.6M shares'212022: 156.7M shares'222023: 170.4M shares'232024: 174.0M shares'242025: 179.8M shares'25
Buybacks Stock-based comp
$0$12.8M$25.7M2016 buybacks: $9.5M2016 stock comp: $19.8M'162017 buybacks: $02017 stock comp: $25.7M'172018 buybacks: $02018 stock comp: $11.1M'182019 buybacks: $4.5M2019 stock comp: $12.6M'192020 buybacks: $02020 stock comp: $13.9M'202021 buybacks: $02021 stock comp: $19.4M'212022 buybacks: $02022 stock comp: $18.7M'222023 buybacks: $02023 stock comp: $21.8M'232024 buybacks: $02024 stock comp: $16.1M'242025 buybacks: $9.0M2025 stock comp: $19.4M'25

How patient are the owners?

Institutional shares by how long they've been held
5+ years85% 3–5 years7% 1–3 years2% Under 1 year6%
Quarterly turnover
4.9%
of institutional shares changed hands
Top 10 managers, median time held
5 years

Super Investors

Investment managers reporting RBBN on Form 13F
JC
Jpmorgan Chase & Co
Shares
52.0M
% of company
29.05%
Change vs last qtr
−100 (−0.0%)
Held since
≤2021
NB
Neuberger Berman Group LLC
Shares
18.3M
% of company
10.22%
Change vs last qtr
+949.1K (+5.5%)
Held since
≤2021

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Institutional Funds

Mutual funds and ETFs reporting RBBN on Form N-PORT; together they hold 18.1% of the company
NI
Neuberger Intrinsic Value Fund
Neuberger Berman Equity Funds
Position value
$8.32M
% of company
2.33%
% of the fund
0.58%
As of
August 31, 2026
VI
Vanguard Information Technology Index Fund
Vanguard World Fund
Position value
$7.68M
% of company
1.39%
% of the fund
0.00%
As of
May 31, 2026

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Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G
MB
McClelland Bruce William
Insider
Shares
2.9M
% of company
1.62%
Change vs last qtr
—
Held since
—
GB
Grayson Bruns H
Insider
Shares
859.4K
% of company
0.48%
Change vs last qtr
—
Held since
—

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