Who owns Rambus Inc.?
Institutional ownership of RMBS from SEC Form 13F filings across 396 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
396
13F holders
$10.32B
value, 2026 filers
77.1%
of shares outstanding (83.6M sh)
80
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30· % of fund = share of the manager's own book · % of co. = share of RMBS's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 14.0M | $1.85B | 0.0% | 12.9% | -14.4% |
| 2 | FMR LLC | 10.5M | $1.39B | 0.1% | 9.6% | +215.2% |
| 3 | Invesco Ltd. | 6.6M | $880.4M | 0.1% | 6.1% | +2.1% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1M | $805.5M | 0.0% | 5.6% | -8.7% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 4.9M | $647.0M | 0.0% | 4.5% | -49.5% |
| 6 | PRICE T ROWE ASSOCIATES INC /MD/ | 3.3M | $442,624 | 0.0% | 3.1% | -1.2% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 2.3M | $305.1M | 0.0% | 2.1% | -26.5% |
| 8 | JPMORGAN CHASE & CO | 2.1M | $261.0M | 0.0% | 1.9% | +14.4% |
| 9 | Swedbank AB | 1.6M | $218.6M | 0.2% | 1.5% | +5.3% |
| 10 | NORGES BANKNEW | 1.5M | $203.4M | 0.0% | 1.4% | new |
| 11 | MORGAN STANLEY | 1.4M | $191.7M | 0.0% | 1.3% | +19.0% |
| 12 | NEUBERGER BERMAN GROUP LLC | 1.3M | $173.4M | 0.1% | 1.2% | +0.7% |
| 13 | BANK OF AMERICA CORP /DE/ | 1.2M | $161.8M | 0.0% | 1.1% | -10.5% |
| 14 | Sixth Street Partners Management Company, L.P.NEW | 1.1M | $147.2M | 25.4% | 1% | new |
| 15 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1M | $147.2M | 0.0% | 1% | -16.4% |
| 16 | GOLDMAN SACHS GROUP INC | 960,878 | $127.5M | 0.0% | 0.9% | +4.2% |
| 17 | BESSEMER GROUP INC | 958,929 | $127,290 | 0.2% | 0.9% | -7.8% |
| 18 | NORTHERN TRUST CORP | 949,113 | $126.0M | 0.0% | 0.9% | -28.9% |
| 19 | Bank of New York Mellon Corp | 828,233 | $109.9M | 0.0% | 0.8% | +6.2% |
| 20 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 797,195 | $105.8M | 0.1% | 0.7% | +678.5% |
| 21 | D. E. Shaw & Co., Inc. | 739,701 | $98.2M | 0.0% | 0.7% | +5676.7% |
| 22 | Fisher Asset Management, LLC | 705,847 | $93.7M | 0.0% | 0.7% | -4.4% |
| 23 | VANGUARD FIDUCIARY TRUST CO | 699,213 | $92.8M | 0.0% | 0.6% | -6.8% |
| 24 | BARCLAYS PLC | 645,970 | $85.7M | 0.0% | 0.6% | -41.0% |
| 25 | RAYMOND JAMES FINANCIAL INC | 603,874 | $80.2M | 0.0% | 0.6% | -23.7% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.