Who owns RAMBUS INC?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of RMBS from SEC Form 13F filings across 617 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.
As of the 2026-06-30 reporting period, 617 institutions disclosed 100.5M shares of RAMBUS INC worth $13.28B — about 92.7% of shares outstanding; the largest disclosed holder is BlackRock, Inc.. Source: SEC Form 13F filings, parsed by EvidInvest.
617
13F holders
$13.28B
value, 2026 filers
92.7%
of shares outstanding (100.5M sh)
143
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% | +1.0% |
| 6 | STATE STREET CORP | 3.9M | $519.5M | 0.0% | 3.6% | -10.5% |
| 7 | PRICE T ROWE ASSOCIATES INC /MD/ | 3.3M | $442.6M | 0.0% | 3.1% | -1.2% |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | 2.3M | $305.1M | 0.0% | 2.1% | -26.5% |
| 9 | JPMORGAN CHASE & CO | 2.1M | $261.0M | 0.0% | 1.9% | +14.4% |
| 10 | DIMENSIONAL FUND ADVISORS LP | 1.7M | $228.2M | 0.0% | 1.6% | -4.2% |
| 11 | Swedbank AB | 1.6M | $218.6M | 0.2% | 1.5% | +5.3% |
| 12 | NORGES BANKNEW | 1.5M | $203.4M | 0.0% | 1.4% | new |
| 13 | MORGAN STANLEY | 1.4M | $191.7M | 0.0% | 1.3% | +19.0% |
| 14 | NEUBERGER BERMAN GROUP LLC | 1.3M | $173.4M | 0.1% | 1.2% | +0.7% |
| 15 | BANK OF AMERICA CORP /DE/ | 1.2M | $161.8M | 0.0% | 1.1% | -10.5% |
| 16 | AQR CAPITAL MANAGEMENT LLC | 1.2M | $152.5M | 0.1% | 1.1% | -3.2% |
| 17 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1M | $147.2M | 0.0% | 1% | -16.4% |
| 18 | EdgePoint Investment Group Inc. | 1.1M | $144.2M | 1.1% | 1% | -44.2% |
| 19 | Rafferty Asset Management, LLC | 984,388 | $130.7M | 0.3% | 0.9% | +32.0% |
| 20 | GOLDMAN SACHS GROUP INC | 960,878 | $127.5M | 0.0% | 0.9% | +4.2% |
| 21 | BESSEMER GROUP INC | 958,929 | $127.3M | 0.2% | 0.9% | -7.8% |
| 22 | NORTHERN TRUST CORP | 949,113 | $126.0M | 0.0% | 0.9% | -28.9% |
| 23 | Bank of New York Mellon Corp | 828,233 | $109.9M | 0.0% | 0.8% | +6.2% |
| 24 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 797,195 | $105.8M | 0.1% | 0.7% | +678.5% |
| 25 | CONGRESS ASSET MANAGEMENT CO | 777,993 | $103.3M | 0.6% | 0.7% | -39.0% |
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.