Company · Ownership research

Ribbon Communications Inc. RBBN

CIK 0001708055 · CUSIP 762544104

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 762544104 (RBBN), not CUSIP 762544904 (RBBN), and does not merge CUSIPs.

This page lists the top 20 of 130 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	JPMORGAN CHASE & CO CIK 19617 · Amended · View history	$171.20M 52,037,727 shares	0.01%	-70(0.00%)Reduced	SEC filing ↗ Dec 26, 2024	▾
02	NEUBERGER BERMAN GROUP LLC CIK 1465109 · Amended · View history	$76.49M 17,779,818 shares	0.06%	-1.71M(-8.80%)Reduced	SEC filing ↗ Nov 14, 2024	▾
03	PARADIGM CAPITAL MANAGEMENT INC/NY CIK 1037792 · View history	$34.70M 10,546,400 shares	1.58%	+420.00K(+4.10%)Added	SEC filing ↗ Aug 14, 2024	▾
04	BlackRock Inc. CIK 1364742 · View history	$24.29M 7,383,934 shares	0.00%	+186.33K(+2.60%)Added	SEC filing ↗ Aug 13, 2024	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$23.07M 7,011,522 shares	0.00%	+78.69K(+1.10%)Added	SEC filing ↗ Aug 13, 2024	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$19.01M 5,779,416 shares	0.00%	+270.97K(+4.90%)Added	SEC filing ↗ Aug 9, 2024	▾
07	ROYCE & ASSOCIATES LP CIK 906304 · View history	$7.07M 2,149,760 shares	0.07%	+134.31K(+6.70%)Added	SEC filing ↗ Aug 13, 2024	▾
08	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$6.82M 2,073,367 shares	0.00%	+32.57K(+1.60%)Added	SEC filing ↗ Aug 9, 2024	▾
09	STATE STREET CORP CIK 93751 · View history	$6.22M 1,890,751 shares	0.00%	+5.53K(+0.30%)Added	SEC filing ↗ Aug 14, 2024	▾
10	FRANKLIN RESOURCES INC CIK 38777 · View history	$6.00M 1,822,902 shares	0.00%	+121.93K(+7.20%)Added	SEC filing ↗ Aug 14, 2024	▾
11	HERALD INVESTMENT MANAGEMENT Ltd CIK 1512022 · View history	$4.63M 1,415,869 shares	0.76%	0(0.00%)Unchanged	SEC filing ↗ Aug 9, 2024	▾
12	FIRST WILSHIRE SECURITIES MANAGEMENT INC CIK 732847 · View history	$3.85M 1,169,685 shares	1.18%	-4.67K(-0.40%)Reduced	SEC filing ↗ Aug 14, 2024	▾
13	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$2.50M 760,223 shares	0.01%	-45.31K(-5.60%)Reduced	SEC filing ↗ Aug 14, 2024	▾
14	NORTHERN TRUST CORP CIK 73124 · View history	$2.48M 753,750 shares	0.00%	-8.83K(-1.20%)Reduced	SEC filing ↗ Aug 14, 2024	▾
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history	$2.46M 748,908 shares	0.00%	+54.59K(+7.90%)Added	SEC filing ↗ Aug 12, 2024	▾
16	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$2.39M 725,273 shares	0.00%	-83.98K(-10.40%)Reduced	SEC filing ↗ Aug 14, 2024	▾
17	BRANDES INVESTMENT PARTNERS, LP CIK 1015079 · View history	$2.38M 753,003 shares	0.03%	-177.78K(-19.10%)Reduced	SEC filing ↗ Aug 19, 2024	▾
18	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$1.53M 463,531 shares	0.00%	+101.47K(+28.00%)Added	SEC filing ↗ Aug 14, 2024	▾
19	Bank of New York Mellon Corp CIK 1390777 · View history	$1.43M 434,204 shares	0.00%	+31.64K(+7.90%)Added	SEC filing ↗ Jul 25, 2024	▾
20	FEDERATED HERMES, INC. CIK 1056288 · View history	$1.42M 432,205 shares	0.00%	0(0.00%)Unchanged	SEC filing ↗ Aug 8, 2024	▾

Showing 20 / 130 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

130

Cancelled or null records excluded

Disclosed shares

123,718,401

Not deduplicated across managers

Disclosed value

$424.90M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Ribbon Communications Inc. · Q2 2024

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.