Company · Ownership research

RAMBUS INC RMBS

CIK 0000917273 · CUSIP 750917106

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 750917106 (RMBS), not CUSIP 750917956 (RMBS), CUSIP 750917906 (RMBS), CUSIP 84860W102 (RMBS), and does not merge CUSIPs.

This page lists the top 20 of 417 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	BlackRock, Inc. CIK 2012383 · View history	$737.10M 14,236,566 shares	0.02%	+97.50K(+0.70%)Added	SEC filing ↗ May 2, 2025	▾
02	VANGUARD GROUP INC CIK 102909 · View history	$644.21M 12,442,412 shares	0.01%	-152.57K(-1.20%)Reduced	SEC filing ↗ May 9, 2025	▾
03	PRICE T ROWE ASSOCIATES INC /MD/ CIK 80255 · View history	$452.87M 8,746,856 shares	0.06%	+3.30M(+60.50%)Added	SEC filing ↗ May 14, 2025	▾
04	STATE STREET CORP CIK 93751 · View history	$237.16M 4,580,557 shares	0.01%	-156.86K(-3.30%)Reduced	SEC filing ↗ May 15, 2025	▾
05	Invesco Ltd. CIK 914208 · View history	$234.65M 4,532,026 shares	0.04%	-467.72K(-9.40%)Reduced	SEC filing ↗ May 12, 2025	▾
06	JPMORGAN CHASE & CO CIK 19617 · View history	$188.84M 3,647,406 shares	0.01%	-536.96K(-12.80%)Reduced	SEC filing ↗ May 12, 2025	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$137.34M 2,651,947 shares	0.01%	+74.76K(+2.90%)Added	SEC filing ↗ May 13, 2025	▾
08	NORGES BANK CIK 1374170 · Amended · View history	$104.05M 2,009,726 shares	0.01%	+224.48K(+12.60%)Added	SEC filing ↗ May 13, 2025	▾
09	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$96.74M 1,868,434 shares	0.02%	+134.25K(+7.70%)Added	SEC filing ↗ May 13, 2025	▾
10	Bank of New York Mellon Corp CIK 1390777 · View history	$92.38M 1,784,251 shares	0.02%	-311.72K(-14.90%)Reduced	SEC filing ↗ Apr 29, 2025	▾
11	Swedbank AB CIK 946431 · View history	$88.02M 1,700,000 shares	0.12%	0(0.00%)Unchanged	SEC filing ↗ Apr 14, 2025	▾
12	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$73.75M 1,424,365 shares	0.05%	+248.01K(+21.10%)Added	SEC filing ↗ May 13, 2025	▾
13	NORTHERN TRUST CORP CIK 73124 · View history	$73.55M 1,420,613 shares	0.01%	-42.73K(-2.90%)Reduced	SEC filing ↗ May 13, 2025	▾
14	NEUBERGER BERMAN GROUP LLC CIK 1465109 · View history	$66.66M 1,282,168 shares	0.06%	-376.20K(-22.70%)Reduced	SEC filing ↗ May 13, 2025	▾
15	CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history	$65.05M 1,256,346 shares	0.01%	+6.60K(+0.50%)Added	SEC filing ↗ Sep 15, 2025	▾
16	WESTWOOD HOLDINGS GROUP INC CIK 1165002 · View history	$63.80M 1,232,210 shares	0.48%	+104.36K(+9.30%)Added	SEC filing ↗ May 9, 2025	▾
17	CONGRESS ASSET MANAGEMENT CO /MA CIK 897378 · View history	$62.11M 1,199,564 shares	0.46%	+333.54K(+38.50%)Added	SEC filing ↗ Apr 11, 2025	▾
18	WELLINGTON MANAGEMENT GROUP LLP CIK 902219 · View history	$61.82M 1,194,046 shares	0.01%	-54.40K(-4.40%)Reduced	SEC filing ↗ May 13, 2025	▾
19	EdgePoint Investment Group Inc. CIK 1481669 · View history	$60.54M 1,169,194 shares	0.49%	+1.17MNew	SEC filing ↗ May 15, 2025	▾
20	VOYA INVESTMENT MANAGEMENT LLC CIK 1068837 · Amended · View history	$57.42M 1,109,115 shares	0.06%	-15.33K(-1.40%)Reduced	SEC filing ↗ Jun 18, 2025	▾

Showing 20 / 417 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

417

Cancelled or null records excluded

Disclosed shares

98,420,711

Not deduplicated across managers

Disclosed value

$5.13B

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.

RAMBUS INC · Q1 2025

Explore all 417 reporting institutions.

This page includes 20 of 417 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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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.