RMBS Rambus, Inc.
Rambus, Inc. (RMBS) Institutional Ownership
What the institutions did with RMBS last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 16.6M | 14.2% |
| BlackRock, Inc. | 14.0M | 11.9% |
| FMR LLC | 10.5M | 8.9% |
| Invesco Ltd. | 6.6M | 5.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.1M | 5.2% |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.9M | 4.2% |
| STATE STREET CORP | 3.9M | 3.3% |
| PRICE T ROWE ASSOCIATES INC /MD/ | 3.3M | 2.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3M | 2.0% |
| JPMORGAN CHASE & CO | 2.1M | 1.8% |
| DIMENSIONAL FUND ADVISORS LP | 1.7M | 1.5% |
| Swedbank AB | 1.6M | 1.4% |
| NORGES BANK | 1.5M | 1.3% |
| MORGAN STANLEY | 1.4M | 1.2% |
| NEUBERGER BERMAN GROUP LLC | 1.3M | 1.1% |
| BANK OF AMERICA CORP /DE/ | 1.2M | 1.0% |
| AQR CAPITAL MANAGEMENT LLC | 1.2M | 1.0% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.1M | 0.9% |
| EdgePoint Investment Group Inc. | 1.1M | 0.9% |
| Rafferty Asset Management, LLC | 984.4K | 0.8% |
| GOLDMAN SACHS GROUP INC | 960.9K | 0.8% |
| BESSEMER GROUP INC | 958.9K | 0.8% |
| NORTHERN TRUST CORP | 949.1K | 0.8% |
| Bank of New York Mellon Corp | 828.2K | 0.7% |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | 797.2K | 0.7% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 124.2K | 16.6M | +16.5M |
| FMR LLC | Increased | 3.3M | 10.5M | +7.1M |
| T. Rowe Price Investment Management, Inc. | Sold Out | 2.4M | 0 | -2.4M |
| BlackRock, Inc. | Reduced | 16.3M | 14.0M | -2.3M |
| EdgePoint Investment Group Inc. | Reduced | 1.9M | 1.1M | -861.5K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 3.1M | 2.3M | -826.8K |
| Hood River Capital Management LLC | Sold Out | 727.5K | 0 | -727.5K |
| D. E. Shaw & Co., Inc. | Increased | 12.8K | 739.7K | +726.9K |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Increased | 102.4K | 797.2K | +694.8K |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 765.8K | 99.8K | -666.0K |
| AMERIPRISE FINANCIAL INC | Reduced | 975.2K | 321.2K | -654.0K |
| UBS Group AG | Reduced | 956.4K | 373.6K | -582.8K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 6.6M | 6.1M | -575.8K |
| CONGRESS ASSET MANAGEMENT CO | Reduced | 1.3M | 778.0K | -498.0K |
| CITIGROUP INC | Reduced | 1.0M | 532.4K | -475.1K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 85.8K | 555.9K | +470.1K |
| STATE STREET CORP | Reduced | 4.4M | 3.9M | -458.5K |
| BARCLAYS PLC | Reduced | 1.1M | 646.0K | -449.7K |
| WELLINGTON MANAGEMENT GROUP LLP | Reduced | 856.6K | 418.5K | -438.1K |
| HRT FINANCIAL LP | New | 0 | 430.2K | +430.2K |
| PANAGORA ASSET MANAGEMENT INC | Reduced | 436.4K | 10.2K | -426.2K |
| Nuveen, LLC | Reduced | 892.3K | 496.4K | -395.9K |
| NORTHERN TRUST CORP | Reduced | 1.3M | 949.1K | -385.0K |
| CITADEL ADVISORS LLC | Increased | 16.5K | 400.2K | +383.7K |
| WESTFIELD CAPITAL MANAGEMENT CO LP | Increased | 14.4K | 385.8K | +371.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.