Rambus Ownership | Who Owns Rambus?
Rambus Ownership Summary
Rambus is owned by 61.41% institutional investors, 0.82% insiders, and 37.78% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 15.13% of RMBS shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 3.36% of its assets in Rambus shares.
RMBS Ownership Benchmark
| Type | Name | % Inst | % Insiders | % Retail |
|---|---|---|---|---|
| Stock | Rambus | 61.41% | 0.82% | 37.78% |
| Sector | Technology Stocks | 36.93% | 14.89% | 48.18% |
| Idea | Semiconductor Stocks List | 48.16% | 6.95% | 44.89% |
Institutional Shareholders
Top Institutional Shareholders by Total Shares
| Holder | Shares | % Holding | Value |
|---|---|---|---|
| Blackrock funding, inc. /de | 16.31M | 15.13% | $1.40B |
| Blackrock | 15.79M | 14.60% | $927.60M |
| Vanguard group | 12.29M | 11.41% | $1.13B |
| Invesco | 6.50M | 6.03% | $559.11M |
| State street | 4.37M | 4.06% | $376.26M |
| Price t rowe associates inc /md/ | 3.38M | 3.13% | $290.50M |
| Fmr | 3.32M | 3.08% | $285.49M |
| Geode capital management | 3.12M | 2.90% | $268.84M |
| T. rowe price investment management | 2.39M | 2.22% | $205.70M |
| Edgepoint investment group | 1.95M | 1.81% | $167.56M |
Top Institutional Shareholders by % of Total Assets
| Holder | Shares | % Assets | Value |
|---|---|---|---|
| Shannon river fund management | 333.82K | 5.48% | $28.72M |
| Deepwater asset management | 58.04K | 3.16% | $4.99M |
| Ai-squared management | 49.58K | 3.10% | $4.27M |
| Aspetuck financial management | 38.17K | 2.25% | $3.28M |
| Alight capital management lp | 100.00K | 2.06% | $8.60M |
| Amj financial wealth management | 76.33K | 1.55% | $6.57M |
| Ranger investment management | 224.37K | 1.40% | $19.30M |
| Edgepoint investment group | 1.95M | 1.34% | $167.56M |
| Emerald advisers | 493.24K | 1.34% | $42.43M |
| Oberweis asset management inc/ | 526.32K | 1.34% | $45.28M |
Top Buyers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Invesco | 6.50M | 0.09% | 2.35M |
| Fmr | 3.32M | 0.01% | 1.73M |
| T. rowe price investment management | 2.39M | 0.14% | 1.70M |
| Norges bank | 1.70M | 0.02% | 1.70M |
| Bessemer group | 1.04M | 0.14% | 946.18K |
Top Sellers
| Holder | Shares | % Assets | Change |
|---|---|---|---|
| Price t rowe associates inc /md/ | 3.38M | 0.03% | -2.01M |
| Alliancebernstein | 267.19K | 0.01% | -1.63M |
| Driehaus capital management | 173.95K | 0.11% | -780.21K |
| Park west asset management | - | - | -660.00K |
| Analog century management lp | - | - | -631.34K |
New Positions
| Holder | Shares | % Assets | Change | Value |
|---|---|---|---|---|
| Norges bank | 1.70M | 0.02% | 1.70M | $156.36M |
| Vanguard fiduciary trust | 749.88K | 0.02% | 749.88K | $64.51M |
| Pointstate capital lp | 701.31K | 0.76% | 701.31K | $60.33M |
| Clearbridge investments | 583.27K | 0.04% | 583.27K | $50.18M |
| Champlain investment partners | 357.22K | 0.39% | 357.22K | $30.73M |
Sold Out
| Holder | Change |
|---|---|
| Tfc financial management | -1.00 |
| Toronto dominion bank | -1.00 |
| Td private client wealth | -1.00 |
| Quaker wealth management | -1.00 |
| Ross\johnson & associates | -1.00 |
Institutional Ownership Trends
| Date | Holdings | Change % | Shares | Change % | Ownership | Change % | Increased Position | Change % | Decreased Position | Change % |
|---|---|---|---|---|---|---|---|---|---|---|
| Mar 31, 2026 | 431 | -24.39% | 66,161,078 | -33.73% | 61 | 0.72% | 199 | -31.14% | 159 | -19.70% |
| Dec 31, 2025 | 438 | -19.04% | 72,833,268 | -26.27% | 67 | 0.80% | 210 | -30.00% | 161 | - |
| Sep 30, 2025 | 521 | 12.53% | 98,420,241 | 4.68% | 91 | 1.20% | 289 | 6.64% | 155 | 19.23% |
| Jun 30, 2025 | 464 | 9.43% | 96,964,608 | 0.64% | 90 | 1.12% | 273 | 17.17% | 129 | -0.77% |
| Mar 31, 2025 | 419 | 2.20% | 94,490,759 | -0.48% | 88 | 1.12% | 229 | 13.93% | 131 | -12.08% |
Top Mutual Funds Shareholders
| Holder | Shares | % Holding | Change |
|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.64M | 3.36% | -1.82K |
| Vanguard US Total Market Shares ETF | 3.41M | 3.19% | 2.52K |
| Vanguard Total Stock Mkt Idx Inv | 3.44M | 3.18% | 8.39K |
| Invesco Small Cap Value A | 2.79M | 2.58% | 252.36K |
| iShares Russell 2000 ETF | 2.55M | 2.35% | 21.48K |
| Vanguard Small Cap Index | 2.48M | 2.30% | -5.25K |
| Invesco Value Opportunities A | 2.14M | 1.98% | 284.92K |
| iShares Semiconductor ETF | 2.01M | 1.86% | 20.19K |
| Swedbank Robur Technology A | 1.40M | 1.29% | - |
| Vanguard Information Technology ETF | 1.40M | 1.29% | -198.96K |
Recent Insider Transactions
| Date | Name | Role | Activity | Value |
|---|---|---|---|---|
| Jun 03, 2026 | Sayiner Necip | - | Sell | $850.75K |
| Jun 02, 2026 | Higashi Emiko | - | Sell | $815.00K |
| Jun 02, 2026 | Higashi Emiko | - | Sell | $790.00K |
| Jun 01, 2026 | STANG ERIC B | - | Sell | $730.00K |
| May 26, 2026 | Higashi Emiko | - | Sell | $787.85K |
Insider Transactions Trends
| Date | Buy | Sell |
|---|---|---|
| 2026 Q2 | - | 15 |
| 2026 Q1 | - | 12 |
| 2025 Q4 | - | 5 |
| 2025 Q3 | - | 8 |
| 2025 Q2 | - | 9 |
RMBS Ownership FAQ
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