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 133 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	$166.52M 52,037,797 shares	0.01%	+441.87K(+0.90%)Added	SEC filing ↗ Dec 26, 2024	▾
02	NEUBERGER BERMAN GROUP LLC CIK 1465109 · Amended · View history	$62.36M 19,486,809 shares	0.05%	+1.05M(+5.70%)Added	SEC filing ↗ Nov 14, 2024	▾
03	PARADIGM CAPITAL MANAGEMENT INC/NY CIK 1037792 · View history	$32.40M 10,126,400 shares	1.55%	+1.07M(+11.90%)Added	SEC filing ↗ May 15, 2024	▾
04	BlackRock Inc. CIK 1364742 · View history	$23.03M 7,197,606 shares	0.00%	-362.69K(-4.80%)Reduced	SEC filing ↗ May 10, 2024	▾
05	VANGUARD GROUP INC CIK 102909 · View history	$22.19M 6,932,828 shares	0.00%	-50.38K(-0.70%)Reduced	SEC filing ↗ May 10, 2024	▾
06	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$17.63M 5,508,444 shares	0.00%	+352.88K(+6.80%)Added	SEC filing ↗ May 10, 2024	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$6.53M 2,040,793 shares	0.00%	+34.10K(+1.70%)Added	SEC filing ↗ May 13, 2024	▾
08	ROYCE & ASSOCIATES LP CIK 906304 · View history	$6.45M 2,015,453 shares	0.06%	+171.01K(+9.30%)Added	SEC filing ↗ May 13, 2024	▾
09	STATE STREET CORP CIK 93751 · View history	$6.03M 1,885,225 shares	0.00%	+127.76K(+7.30%)Added	SEC filing ↗ May 15, 2024	▾
10	FRANKLIN RESOURCES INC CIK 38777 · View history	$5.44M 1,700,971 shares	0.00%	+1.70MNew	SEC filing ↗ May 13, 2024	▾
11	HERALD INVESTMENT MANAGEMENT Ltd CIK 1512022 · View history	$4.53M 1,415,869 shares	0.73%	0(0.00%)Unchanged	SEC filing ↗ May 13, 2024	▾
12	FIRST WILSHIRE SECURITIES MANAGEMENT INC CIK 732847 · View history	$3.76M 1,174,355 shares	1.10%	-4.99K(-0.40%)Reduced	SEC filing ↗ May 15, 2024	▾
13	BRANDES INVESTMENT PARTNERS, LP CIK 1015079 · View history	$2.98M 930,779 shares	0.04%	+289.83K(+45.20%)Added	SEC filing ↗ May 15, 2024	▾
14	ARROWSTREET CAPITAL, LIMITED PARTNERSHIP CIK 1164508 · View history	$2.59M 809,253 shares	0.00%	+184.90K(+29.60%)Added	SEC filing ↗ May 15, 2024	▾
15	JACOBS LEVY EQUITY MANAGEMENT, INC CIK 884414 · View history	$2.58M 805,531 shares	0.01%	-45.24K(-5.30%)Reduced	SEC filing ↗ May 15, 2024	▾
16	NORTHERN TRUST CORP CIK 73124 · View history	$2.44M 762,579 shares	0.00%	-99.80K(-11.60%)Reduced	SEC filing ↗ May 14, 2024	▾
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · View history	$2.22M 694,314 shares	0.00%	+4.05K(+0.60%)Added	SEC filing ↗ May 9, 2024	▾
18	FEDERATED HERMES, INC. CIK 1056288 · View history	$1.38M 432,205 shares	0.00%	+6.58K(+1.50%)Added	SEC filing ↗ May 14, 2024	▾
19	Nuveen Asset Management, LLC CIK 1521019 · View history	$1.35M 421,448 shares	0.00%	-45.52K(-9.70%)Reduced	SEC filing ↗ May 13, 2024	▾
20	Bank of New York Mellon Corp CIK 1390777 · View history	$1.29M 402,560 shares	0.00%	-17.19K(-4.10%)Reduced	SEC filing ↗ Apr 25, 2024	▾

Showing 20 / 133 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

133

Cancelled or null records excluded

Disclosed shares

124,279,261

Not deduplicated across managers

Disclosed value

$397.69M

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. · Q1 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.