Ribbon Communications RBBN Institutional Ownership

NASDAQ RBBN

$1.36 -0.05 (-3.55%)

At close: Oct 21, 2026 · 4:00 PM EDT

Institutions by Trading Activity

161 Institutions

Increased 88 54.7%

Unchanged 32 19.9%

Reduced 41 25.5%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

71.77%

▼-1.81 pp QoQ

Shares Held by Institutions

128.31Mn

of 178.77Mn outstanding

▼-0.73% QoQ

Shares Outstanding

178.77Mn

50.46Mn held outside 13F filers

Institutional Investors

161

filed 13F for Jun 2026

▲+11 vs prior quarter

Net Shares Added (QoQ)

-944.85K

distributed since last quarter

Value of Holdings

$180.92Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Updated Oct 11, 2026

Ribbon Communications Inc. (NASDAQ:RBBN) counted 161 institutional investors among its 13F-reported shareholders for the quarter ended June 30, 2026.

These investors held 71.77% of outstanding shares in Q2 2026, down from 73.58% the quarter before.
Total holdings of RBBN shares fell 0.73% from Q1 2026, and the holder count rose 11.81% from Q2 2025.
Among the 161 holders of Ribbon Communications, 88 added to their positions, 41 reduced their stakes and 32 left their positions unchanged.
The aggregate institutional position in Ribbon Communications was 128.31Mn shares at the end of Q2 2026, down 944.85K from the prior quarter and up 446.02K from a year earlier.
JPMorgan Chase & Co was the top holder of Ribbon Communications as of June 30, 2026, with 52.04Mn shares, or 29.11% of shares outstanding.
Among holders that already owned Ribbon Communications, the biggest buyers in Q2 2026 were Neuberger Berman Group LLC (+949.09K shares), Citadel Advisors LLC (+666.21K shares), BlackRock, Inc. (+422.58K shares), Acadian Asset Management LLC (+329.74K shares) and D. E. Shaw & Co., Inc. (+251.9K shares).
Holders that trimmed the most shares of Ribbon Communications in Q2 2026 while keeping a position were Paradigm Capital Management Inc (-5Mn shares), Goldman Sachs Group Inc (-329.31K shares), Vanguard Capital Management LLC (-290.83K shares), GSA Capital Partners LLP (-118.71K shares) and Jacobs Levy Equity Management, Inc (-103.22K shares).
According to Business Quant data, the leading holders of RBBN for Q2 2026 were JPMorgan Chase & Co (52.04Mn shares), Neuberger Berman Group LLC (18.31Mn shares), BlackRock, Inc. (7.15Mn shares), Dimensional Fund Advisors LP (6.29Mn shares), Royce & Associates LP (5.09Mn shares), Vanguard Capital Management LLC (3.93Mn shares), Vanguard Portfolio Management LLC (3.51Mn shares), Paradigm Capital Management Inc (3.04Mn shares), Geode Capital Management, LLC (2.49Mn shares) and Connor, Clark & Lunn Investment Management Ltd. (2.21Mn shares).

Form 13F Holdings

161 Institutional Holders

Report period 30 Jun, 2026

Total shares held 128.31Mn

Of outstanding 71.77%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	Jpmorgan Chase & Co	0000019617	52,042,936	29.11%	▼100	0.00%	$115.54Mn
2	Neuberger Berman Group LLC	0001465109	18,311,073	10.24%	▲949,085	+5.47%	$38.67Mn
3	BlackRock, Inc.	0002012383	7,146,590	4.00%	▲422,583	+6.28%	$16.72Mn
4	DIMENSIONAL FUND ADVISORS LP	0000354204	6,286,323	3.52%	▼64,787	-1.02%	$14.71Mn
5	ROYCE & ASSOCIATES LP	0000906304	5,090,927	2.85%	▲211,186	+4.33%	$11.91Mn
6	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	3,925,626	2.20%	▼290,833	-6.90%	$9.19Mn
7	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	3,513,067	1.97%	▲177,402	+5.32%	$8.22Mn
8	PARADIGM CAPITAL MANAGEMENT INC/NY	0001037792	3,036,398	1.70%	▼4,999,937	-62.22%	$7.11Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,485,064	1.39%	▲70,504	+2.92%	$5.82Mn
10	Connor, Clark & Lunn Investment Management Ltd.	0001596800	2,213,134	1.24%	▲123,412	+5.91%	$5.18Mn
11	State Street Corp	0000093751	1,930,153	1.08%	▲20,126	+1.05%	$4.52Mn
12	D. E. Shaw & Co., Inc.	0001009207	1,790,375	1.00%	▲251,903	+16.37%	$4.19Mn
13	ACADIAN ASSET MANAGEMENT LLC	0000916542	1,768,227	0.99%	▲329,737	+22.92%	$4.13K
14	AQR CAPITAL MANAGEMENT LLC	0001167557	1,409,795	0.79%	▲152,448	+12.12%	$3.30Mn
15	FIRST WILSHIRE SECURITIES MANAGEMENT INC	0000732847	1,404,493	0.79%	▼2,685	-0.19%	$3.29Mn
16	CITADEL ADVISORS LLC	0001423053	1,241,200	0.69%	▲666,211	+115.87%	$2.90Mn
17	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	0001164508	1,215,230	0.68%	▼1,646	-0.14%	$2.84Mn
18	MARSHALL WACE, LLP	0001318757	814,132	0.46%	▲44,345	+5.76%	$1.91Mn
19	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	800,159	0.45%	▲91,996	+12.99%	$1.87Mn
20	Northern Trust Corp	0000073124	749,823	0.42%	▲43,965	+6.23%	$1.75Mn

Showing 1 to 20 of 161 holders