BLACKROCK
Rank #1
15.0%
- Shares
- 16.31M
- Change
- +30.12K
- Change %
- +18.00%
- Filing
- Mar 31, 2026
Increased
Methodology published · Market data, model notes, and corrections process are public · Data policy · Corrections policy
NASDAQ · TECHNOLOGY · Holders
Rambus Inc (RMBS) Institutional Ownership & Insider Trading History
Top RMBS institutional shareholders, filing changes, and Form 4 insider activity with filters for buys, sales, option exercises, gifts, and tax withholding.
Section freshness
Price Jun 15, 8:39 AM EDT · Statements Mar 30, 8:00 PM EDT
Source timingDetailsHide
Data freshness
Prices update fastest. Fundamentals, analyst data, and news update on their own schedules, so check these timestamps before comparing signals.
Price time means the latest available trade or regular-market close. Other times show when that section was checked or published.
PriceLive
Last traded •
Source: Market data provider
Fundamentalsevery 1 day
Provider checked •
Source: Market data provider
Analystevery 1 day
Provider checked •
Source: Market data provider
Newsevery 4 hr
Latest item •
Source: Market data provider
Ownership read
RMBS insider sentiment: Net selling.
BLACKROCK is the largest loaded institutional holder. 87 sale rows and 0 purchase rows are visible in the loaded Form 4 history. Use the filters below to separate real buying and selling from option exercises, gifts, awards, and tax withholding.
Insider flow
RMBS
Purchases—
Sales882.72K
Directional bars ignore awards, gifts, conversions, and tax withholding rows.
Top holder
16.31M
BLACKROCK
Insider stance
Net selling
$76.28M sold / — bought
Latest filing
Jun 3, 2026
Most recent holder or insider filing date
Rows loaded
240
120 holder / 120 insider
- Holder rows
- 120
- Market data source
- Latest filing
- Jun 3, 2026
- Most recent holder or insider filing date
- Increased / initiated
- 67
- 52 decreased in loaded rows
- Insider rows
- 120
- Market data source
Top 120 institutional holders
Rambus Inc (RMBS) institutional ownership
Ranked by reported share count, with position changes and latest filing dates where ownership data supplies them.
VANGUARD GROUP INC
Rank #2
11.3%
- Shares
- 12.29M
- Change
- -410.84K
- Change %
- -3.23%
- Filing
- Dec 31, 2025
Decreased
VANGUARD PORTFOLIO MANAGEMENT LLC
Rank #3
6.12%
- Shares
- 6.64M
- Change
- +6.64M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
INVESCO LTD.
Rank #4
5.98%
- Shares
- 6.50M
- Change
- +2.35M
- Change %
- +56.65%
- Filing
- Mar 31, 2026
Increased
VANGUARD CAPITAL MANAGEMENT LLC
Rank #5
4.44%
- Shares
- 4.83M
- Change
- +4.83M
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
STATE STREET CORP
Rank #6
4.03%
- Shares
- 4.37M
- Change
- +122.05K
- Change %
- +2.87%
- Filing
- Mar 31, 2026
Increased
PRICE T ROWE ASSOCIATES INC
Rank #7
3.11%
- Shares
- 3.38M
- Change
- -2.01M
- Change %
- -37.30%
- Filing
- Mar 31, 2026
Decreased
FMR LLC
Rank #8
3.06%
- Shares
- 3.32M
- Change
- +1.73M
- Change %
- +1.09%
- Filing
- Mar 31, 2026
Increased
GEODE CAPITAL MANAGEMENT
Rank #9
2.88%
- Shares
- 3.12M
- Change
- +281.78K
- Change %
- +9.91%
- Filing
- Mar 31, 2026
Increased
T. ROWE PRICE INVESTMENT MANAGEMENT
Rank #10
2.20%
- Shares
- 2.39M
- Change
- +1.70M
- Change %
- +2.48%
- Filing
- Mar 31, 2026
Increased
EDGEPOINT INVESTMENT GROUP INC.
Rank #11
1.79%
- Shares
- 1.95M
- Change
- +541.06K
- Change %
- +38.46%
- Filing
- Mar 31, 2026
Increased
JPMORGAN CHASE & CO
Rank #12
1.69%
- Shares
- 1.84M
- Change
- -228.84K
- Change %
- -11.08%
- Filing
- Mar 31, 2026
Decreased
DIMENSIONAL FUND ADVISORS LP
Rank #13
1.65%
- Shares
- 1.80M
- Change
- -98.23K
- Change %
- -5.19%
- Filing
- Mar 31, 2026
Decreased
NORGES BANK
Rank #14
1.57%
- Shares
- 1.70M
- Change
- -270.77K
- Change %
- -13.73%
- Filing
- Dec 31, 2025
Decreased
SWEDBANK AB
Rank #15
1.44%
- Shares
- 1.56M
- Change
- +200.00K
- Change %
- +14.67%
- Filing
- Mar 31, 2026
Increased
BANK OF AMERICA CORP
Rank #16
1.25%
- Shares
- 1.36M
- Change
- +111.93K
- Change %
- +8.96%
- Filing
- Mar 31, 2026
Increased
NORTHERN TRUST CORP
Rank #17
1.23%
- Shares
- 1.33M
- Change
- +18.54K
- Change %
- +1.41%
- Filing
- Mar 31, 2026
Increased
CHARLES SCHWAB INVESTMENT MANAGEMENT INC
Rank #18
1.22%
- Shares
- 1.33M
- Change
- -1.29K
- Change %
- -10.00%
- Filing
- Mar 31, 2026
Decreased
NEUBERGER BERMAN GROUP LLC
Rank #19
1.20%
- Shares
- 1.30M
- Change
- -3.78K
- Change %
- -29.00%
- Filing
- Mar 31, 2026
Decreased
CONGRESS ASSET MANAGEMENT CO
Rank #20
1.17%
- Shares
- 1.28M
- Change
- -134.64K
- Change %
- -9.54%
- Filing
- Mar 31, 2026
Decreased
AQR CAPITAL MANAGEMENT LLC
Rank #21
1.15%
- Shares
- 1.25M
- Change
- +539.33K
- Change %
- +75.84%
- Filing
- Mar 31, 2026
Increased
MORGAN STANLEY
Rank #22
1.12%
- Shares
- 1.21M
- Change
- +328.11K
- Change %
- +37.07%
- Filing
- Mar 31, 2026
Increased
BARCLAYS PLC
Rank #23
1.01%
- Shares
- 1.10M
- Change
- +72.72K
- Change %
- +7.11%
- Filing
- Mar 31, 2026
Increased
BESSEMER GROUP INC
Rank #24
0.96%
- Shares
- 1.04M
- Change
- +946.18K
- Change %
- +10.09%
- Filing
- Mar 31, 2026
Increased
CITIGROUP INC
Rank #25
0.93%
- Shares
- 1.01M
- Change
- +505.01K
- Change %
- +1.00%
- Filing
- Mar 31, 2026
Increased
AMERIPRISE FINANCIAL INC
Rank #26
0.90%
- Shares
- 975.21K
- Change
- +408.53K
- Change %
- +72.09%
- Filing
- Mar 31, 2026
Increased
UBS GROUP AG
Rank #27
0.88%
- Shares
- 956.39K
- Change
- +500.72K
- Change %
- +1.10%
- Filing
- Mar 31, 2026
Increased
GOLDMAN SACHS GROUP INC
Rank #28
0.85%
- Shares
- 922.11K
- Change
- -272.29K
- Change %
- -22.80%
- Filing
- Mar 31, 2026
Decreased
NUVEEN
Rank #29
0.82%
- Shares
- 892.34K
- Change
- -209.75K
- Change %
- -19.03%
- Filing
- Mar 31, 2026
Decreased
WELLINGTON MANAGEMENT GROUP LLP
Rank #30
0.79%
- Shares
- 856.60K
- Change
- -77.34K
- Change %
- -8.28%
- Filing
- Mar 31, 2026
Decreased
RAYMOND JAMES FINANCIAL INC
Rank #31
0.73%
- Shares
- 790.98K
- Change
- -141.30K
- Change %
- -15.16%
- Filing
- Mar 31, 2026
Decreased
BANK OF NEW YORK MELLON CORP
Rank #32
0.72%
- Shares
- 779.88K
- Change
- -314.28K
- Change %
- -28.72%
- Filing
- Mar 31, 2026
Decreased
VOYA INVESTMENT MANAGEMENT LLC
Rank #33
0.71%
- Shares
- 765.78K
- Change
- +41.58K
- Change %
- +5.74%
- Filing
- Mar 31, 2026
Increased
VANGUARD FIDUCIARY TRUST CO
Rank #34
0.69%
- Shares
- 749.88K
- Change
- +749.88K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
RAFFERTY ASSET MANAGEMENT
Rank #35
0.69%
- Shares
- 745.52K
- Change
- -190.26K
- Change %
- -20.33%
- Filing
- Mar 31, 2026
Decreased
FISHER ASSET MANAGEMENT
Rank #36
0.68%
- Shares
- 738.36K
- Change
- +221.08K
- Change %
- +42.74%
- Filing
- Mar 31, 2026
Increased
HOOD RIVER CAPITAL MANAGEMENT LLC
Rank #37
0.67%
- Shares
- 727.49K
- Change
- +18.65K
- Change %
- +2.63%
- Filing
- Mar 31, 2026
Increased
POINTSTATE CAPITAL LP
Rank #38
0.65%
- Shares
- 701.31K
- Change
- +701.31K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
LOOMIS SAYLES & CO L P
Rank #39
0.61%
- Shares
- 659.84K
- Change
- -40.50K
- Change %
- -5.78%
- Filing
- Mar 31, 2026
Decreased
CLEARBRIDGE INVESTMENTS
Rank #40
0.54%
- Shares
- 583.27K
- Change
- +583.27K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
OBERWEIS ASSET MANAGEMENT INC
Rank #41
0.48%
- Shares
- 526.32K
- Change
- +64.22K
- Change %
- +13.90%
- Filing
- Mar 31, 2026
Increased
EMERALD ADVISERS
Rank #42
0.45%
- Shares
- 493.24K
- Change
- -133.75K
- Change %
- -21.33%
- Filing
- Mar 31, 2026
Decreased
CAISSE DE DEPOT ET PLACEMENT DU QUEBEC
Rank #43
0.41%
- Shares
- 448.60K
- Change
- +1.29K
- Change %
- +29.00%
- Filing
- Mar 31, 2026
Increased
PANAGORA ASSET MANAGEMENT INC
Rank #44
0.40%
- Shares
- 436.43K
- Change
- +1.73K
- Change %
- +40.00%
- Filing
- Mar 31, 2026
Increased
SCHWARTZ INVESTMENT COUNSEL INC
Rank #45
0.39%
- Shares
- 420.34K
- Change
- +240.00K
- Change %
- +1.33%
- Filing
- Mar 31, 2026
Increased
STEPHENS INVESTMENT MANAGEMENT GROUP LLC
Rank #46
0.38%
- Shares
- 407.78K
- Change
- +214.08K
- Change %
- +1.11%
- Filing
- Mar 31, 2026
Increased
LORD
Rank #47
0.36%
- Shares
- 387.12K
- Change
- -151.91K
- Change %
- -28.18%
- Filing
- Mar 31, 2026
Decreased
PRINCIPAL FINANCIAL GROUP INC
Rank #48
0.34%
- Shares
- 373.54K
- Change
- -38.18K
- Change %
- -9.27%
- Filing
- Mar 31, 2026
Decreased
WESTWOOD HOLDINGS GROUP INC
Rank #49
0.34%
- Shares
- 369.15K
- Change
- +84.08K
- Change %
- +29.49%
- Filing
- Mar 31, 2026
Increased
JANUS HENDERSON GROUP PLC
Rank #50
0.33%
- Shares
- 358.89K
- Change
- -20.62K
- Change %
- -5.43%
- Filing
- Mar 31, 2026
Decreased
CHAMPLAIN INVESTMENT PARTNERS
Rank #51
0.33%
- Shares
- 357.22K
- Change
- +357.22K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
SEI INVESTMENTS CO
Rank #52
0.31%
- Shares
- 339.93K
- Change
- -46.81K
- Change %
- -12.11%
- Filing
- Mar 31, 2026
Decreased
SHANNON RIVER FUND MANAGEMENT LLC
Rank #53
0.31%
- Shares
- 333.82K
- Change
- +333.82K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
NOMURA INVESTMENT MANAGEMENT BUSINESS TRUST
Rank #54
0.30%
- Shares
- 326.94K
- Change
- +110.07K
- Change %
- +50.76%
- Filing
- Mar 31, 2026
Increased
FRANKLIN RESOURCES INC
Rank #55
0.30%
- Shares
- 323.36K
- Change
- -162.44K
- Change %
- -33.44%
- Filing
- Mar 31, 2026
Decreased
RHUMBLINE ADVISERS
Rank #56
0.29%
- Shares
- 319.58K
- Change
- +4.97K
- Change %
- +1.58%
- Filing
- Mar 31, 2026
Increased
TIMESSQUARE CAPITAL MANAGEMENT
Rank #57
0.29%
- Shares
- 312.36K
- Change
- +312.36K
- Change %
- —
- Filing
- Mar 31, 2026
Initiated
EMERALD MUTUAL FUND ADVISERS TRUST
Rank #58
0.28%
- Shares
- 307.25K
- Change
- -83.97K
- Change %
- -21.46%
- Filing
- Mar 31, 2026
Decreased
FIRST TRUST ADVISORS LP
Rank #59
0.28%
- Shares
- 307.24K
- Change
- +7.09K
- Change %
- +2.36%
- Filing
- Mar 31, 2026
Increased
GRANAHAN INVESTMENT MANAGEMENT
Rank #60
0.26%
- Shares
- 280.25K
- Change
- +14.73K
- Change %
- +5.55%
- Filing
- Mar 31, 2026
Increased
ALLIANCEBERNSTEIN L.P.
Rank #61
0.25%
- Shares
- 267.19K
- Change
- -1.63M
- Change %
- -85.94%
- Filing
- Mar 31, 2026
Decreased
BNP PARIBAS FINANCIAL MARKETS
Rank #62
0.24%
- Shares
- 264.40K
- Change
- +17.90K
- Change %
- +7.26%
- Filing
- Mar 31, 2026
Increased
ARROWMARK COLORADO HOLDINGS LLC
Rank #63
0.24%
- Shares
- 261.72K
- Change
- -10.29K
- Change %
- -3.78%
- Filing
- Mar 31, 2026
Decreased
UBS AM
Rank #64
0.22%
- Shares
- 240.61K
- Change
- -3.74K
- Change %
- -1.53%
- Filing
- Mar 31, 2026
Decreased
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM
Rank #65
0.21%
- Shares
- 227.27K
- Change
- +31.06K
- Change %
- +15.83%
- Filing
- Mar 31, 2026
Increased
RANGER INVESTMENT MANAGEMENT
Rank #66
0.21%
- Shares
- 224.37K
- Change
- +128.88K
- Change %
- +1.35%
- Filing
- Mar 31, 2026
Increased
FEDERATED HERMES
Rank #67
0.20%
- Shares
- 215.40K
- Change
- +86.04K
- Change %
- +66.51%
- Filing
- Mar 31, 2026
Increased
SWISS NATIONAL BANK
Rank #68
0.20%
- Shares
- 213.00K
- Change
- +800
- Change %
- +38.00%
- Filing
- Mar 31, 2026
Increased
OSAIC HOLDINGS
Rank #69
0.18%
- Shares
- 199.73K
- Change
- -17.35K
- Change %
- -7.99%
- Filing
- Mar 31, 2026
Decreased
CANADA PENSION PLAN INVESTMENT BOARD
Rank #70
0.18%
- Shares
- 199.45K
- Change
- -267.15K
- Change %
- -57.26%
- Filing
- Mar 31, 2026
Decreased
CW ADVISORS
Rank #71
0.18%
- Shares
- 191.22K
- Change
- +8.57K
- Change %
- +4.69%
- Filing
- Jun 30, 2025
Increased
GLENMEDE INVESTMENT MANAGEMENT
Rank #72
0.17%
- Shares
- 188.19K
- Change
- -109.25K
- Change %
- -36.73%
- Filing
- Sep 30, 2025
Decreased
VICTORY CAPITAL MANAGEMENT INC
Rank #73
0.17%
- Shares
- 183.00K
- Change
- +116.01K
- Change %
- +1.73%
- Filing
- Mar 31, 2026
Increased
HIGHTOWER ADVISORS
Rank #74
0.17%
- Shares
- 181.60K
- Change
- +24.13K
- Change %
- +15.32%
- Filing
- Mar 31, 2026
Increased
DRIEHAUS CAPITAL MANAGEMENT LLC
Rank #75
0.16%
- Shares
- 173.95K
- Change
- -780.21K
- Change %
- -81.77%
- Filing
- Mar 31, 2026
Decreased
WCM INVESTMENT MANAGEMENT
Rank #76
0.15%
- Shares
- 165.02K
- Change
- -7.35K
- Change %
- -4.26%
- Filing
- Mar 31, 2026
Decreased
THRIVENT FINANCIAL FOR LUTHERANS
Rank #77
0.15%
- Shares
- 162.06K
- Change
- +67.56K
- Change %
- +71.50%
- Filing
- Mar 31, 2026
Increased
GLENMEDE TRUST CO NA
Rank #78
0.15%
- Shares
- 159.13K
- Change
- -13.40K
- Change %
- -7.77%
- Filing
- Mar 31, 2026
Decreased
LEGAL & GENERAL GROUP PLC
Rank #79
0.15%
- Shares
- 158.70K
- Change
- -18.89K
- Change %
- -10.64%
- Filing
- Mar 31, 2026
Decreased
SEGALL BRYANT & HAMILL
Rank #80
0.14%
- Shares
- 157.45K
- Change
- +49.02K
- Change %
- +45.21%
- Filing
- Mar 31, 2026
Increased
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 15.0% | 16.31M | +30.12K Increased | +18.00% | Mar 31, 2026 | |
| 2 | 11.3% | 12.29M | -410.84K Decreased | -3.23% | Dec 31, 2025 | |
| 3 | 6.12% | 6.64M | +6.64M Initiated | — | Mar 31, 2026 | |
| 4 | 5.98% | 6.50M | +2.35M Increased | +56.65% | Mar 31, 2026 | |
| 5 | 4.44% | 4.83M | +4.83M Initiated | — | Mar 31, 2026 | |
| 6 | 4.03% | 4.37M | +122.05K Increased | +2.87% | Mar 31, 2026 | |
| 7 | 3.11% | 3.38M | -2.01M Decreased | -37.30% | Mar 31, 2026 | |
| 8 | 3.06% | 3.32M | +1.73M Increased | +1.09% | Mar 31, 2026 | |
| 9 | 2.88% | 3.12M | +281.78K Increased | +9.91% | Mar 31, 2026 | |
| 10 | 2.20% | 2.39M | +1.70M Increased | +2.48% | Mar 31, 2026 | |
| 11 | EDGEPOINT INVESTMENT GROUP INC. | 1.79% | 1.95M | +541.06K Increased | +38.46% | Mar 31, 2026 |
| 12 | 1.69% | 1.84M | -228.84K Decreased | -11.08% | Mar 31, 2026 | |
| 13 | 1.65% | 1.80M | -98.23K Decreased | -5.19% | Mar 31, 2026 | |
| 14 | 1.57% | 1.70M | -270.77K Decreased | -13.73% | Dec 31, 2025 | |
| 15 | SWEDBANK AB | 1.44% | 1.56M | +200.00K Increased | +14.67% | Mar 31, 2026 |
| 16 | 1.25% | 1.36M | +111.93K Increased | +8.96% | Mar 31, 2026 | |
| 17 | 1.23% | 1.33M | +18.54K Increased | +1.41% | Mar 31, 2026 | |
| 18 | 1.22% | 1.33M | -1.29K Decreased | -10.00% | Mar 31, 2026 | |
| 19 | NEUBERGER BERMAN GROUP LLC | 1.20% | 1.30M | -3.78K Decreased | -29.00% | Mar 31, 2026 |
| 20 | CONGRESS ASSET MANAGEMENT CO | 1.17% | 1.28M | -134.64K Decreased | -9.54% | Mar 31, 2026 |
| 21 | AQR CAPITAL MANAGEMENT LLC | 1.15% | 1.25M | +539.33K Increased | +75.84% | Mar 31, 2026 |
| 22 | 1.12% | 1.21M | +328.11K Increased | +37.07% | Mar 31, 2026 | |
| 23 | BARCLAYS PLC | 1.01% | 1.10M | +72.72K Increased | +7.11% | Mar 31, 2026 |
| 24 | BESSEMER GROUP INC | 0.96% | 1.04M | +946.18K Increased | +10.09% | Mar 31, 2026 |
| 25 | CITIGROUP INC | 0.93% | 1.01M | +505.01K Increased | +1.00% | Mar 31, 2026 |
| 26 | AMERIPRISE FINANCIAL INC | 0.90% | 975.21K | +408.53K Increased | +72.09% | Mar 31, 2026 |
| 27 | 0.88% | 956.39K | +500.72K Increased | +1.10% | Mar 31, 2026 | |
| 28 | 0.85% | 922.11K | -272.29K Decreased | -22.80% | Mar 31, 2026 | |
| 29 | NUVEEN | 0.82% | 892.34K | -209.75K Decreased | -19.03% | Mar 31, 2026 |
| 30 | 0.79% | 856.60K | -77.34K Decreased | -8.28% | Mar 31, 2026 | |
| 31 | RAYMOND JAMES FINANCIAL INC | 0.73% | 790.98K | -141.30K Decreased | -15.16% | Mar 31, 2026 |
| 32 | BANK OF NEW YORK MELLON CORP | 0.72% | 779.88K | -314.28K Decreased | -28.72% | Mar 31, 2026 |
| 33 | VOYA INVESTMENT MANAGEMENT LLC | 0.71% | 765.78K | +41.58K Increased | +5.74% | Mar 31, 2026 |
| 34 | 0.69% | 749.88K | +749.88K Initiated | — | Mar 31, 2026 | |
| 35 | RAFFERTY ASSET MANAGEMENT | 0.69% | 745.52K | -190.26K Decreased | -20.33% | Mar 31, 2026 |
| 36 | FISHER ASSET MANAGEMENT | 0.68% | 738.36K | +221.08K Increased | +42.74% | Mar 31, 2026 |
| 37 | HOOD RIVER CAPITAL MANAGEMENT LLC | 0.67% | 727.49K | +18.65K Increased | +2.63% | Mar 31, 2026 |
| 38 | POINTSTATE CAPITAL LP | 0.65% | 701.31K | +701.31K Initiated | — | Mar 31, 2026 |
| 39 | LOOMIS SAYLES & CO L P | 0.61% | 659.84K | -40.50K Decreased | -5.78% | Mar 31, 2026 |
| 40 | CLEARBRIDGE INVESTMENTS | 0.54% | 583.27K | +583.27K Initiated | — | Mar 31, 2026 |
| 41 | OBERWEIS ASSET MANAGEMENT INC | 0.48% | 526.32K | +64.22K Increased | +13.90% | Mar 31, 2026 |
| 42 | EMERALD ADVISERS | 0.45% | 493.24K | -133.75K Decreased | -21.33% | Mar 31, 2026 |
| 43 | CAISSE DE DEPOT ET PLACEMENT DU QUEBEC | 0.41% | 448.60K | +1.29K Increased | +29.00% | Mar 31, 2026 |
| 44 | PANAGORA ASSET MANAGEMENT INC | 0.40% | 436.43K | +1.73K Increased | +40.00% | Mar 31, 2026 |
| 45 | SCHWARTZ INVESTMENT COUNSEL INC | 0.39% | 420.34K | +240.00K Increased | +1.33% | Mar 31, 2026 |
| 46 | STEPHENS INVESTMENT MANAGEMENT GROUP LLC | 0.38% | 407.78K | +214.08K Increased | +1.11% | Mar 31, 2026 |
| 47 | LORD | 0.36% | 387.12K | -151.91K Decreased | -28.18% | Mar 31, 2026 |
| 48 | PRINCIPAL FINANCIAL GROUP INC | 0.34% | 373.54K | -38.18K Decreased | -9.27% | Mar 31, 2026 |
| 49 | WESTWOOD HOLDINGS GROUP INC | 0.34% | 369.15K | +84.08K Increased | +29.49% | Mar 31, 2026 |
| 50 | JANUS HENDERSON GROUP PLC | 0.33% | 358.89K | -20.62K Decreased | -5.43% | Mar 31, 2026 |
| 51 | CHAMPLAIN INVESTMENT PARTNERS | 0.33% | 357.22K | +357.22K Initiated | — | Mar 31, 2026 |
| 52 | SEI INVESTMENTS CO | 0.31% | 339.93K | -46.81K Decreased | -12.11% | Mar 31, 2026 |
| 53 | SHANNON RIVER FUND MANAGEMENT LLC | 0.31% | 333.82K | +333.82K Initiated | — | Mar 31, 2026 |
| 54 | NOMURA INVESTMENT MANAGEMENT BUSINESS TRUST | 0.30% | 326.94K | +110.07K Increased | +50.76% | Mar 31, 2026 |
| 55 | 0.30% | 323.36K | -162.44K Decreased | -33.44% | Mar 31, 2026 | |
| 56 | RHUMBLINE ADVISERS | 0.29% | 319.58K | +4.97K Increased | +1.58% | Mar 31, 2026 |
| 57 | TIMESSQUARE CAPITAL MANAGEMENT | 0.29% | 312.36K | +312.36K Initiated | — | Mar 31, 2026 |
| 58 | EMERALD MUTUAL FUND ADVISERS TRUST | 0.28% | 307.25K | -83.97K Decreased | -21.46% | Mar 31, 2026 |
| 59 | FIRST TRUST ADVISORS LP | 0.28% | 307.24K | +7.09K Increased | +2.36% | Mar 31, 2026 |
| 60 | GRANAHAN INVESTMENT MANAGEMENT | 0.26% | 280.25K | +14.73K Increased | +5.55% | Mar 31, 2026 |
| 61 | 0.25% | 267.19K | -1.63M Decreased | -85.94% | Mar 31, 2026 | |
| 62 | BNP PARIBAS FINANCIAL MARKETS | 0.24% | 264.40K | +17.90K Increased | +7.26% | Mar 31, 2026 |
| 63 | ARROWMARK COLORADO HOLDINGS LLC | 0.24% | 261.72K | -10.29K Decreased | -3.78% | Mar 31, 2026 |
| 64 | 0.22% | 240.61K | -3.74K Decreased | -1.53% | Mar 31, 2026 | |
| 65 | CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM | 0.21% | 227.27K | +31.06K Increased | +15.83% | Mar 31, 2026 |
| 66 | RANGER INVESTMENT MANAGEMENT | 0.21% | 224.37K | +128.88K Increased | +1.35% | Mar 31, 2026 |
| 67 | FEDERATED HERMES | 0.20% | 215.40K | +86.04K Increased | +66.51% | Mar 31, 2026 |
| 68 | SWISS NATIONAL BANK | 0.20% | 213.00K | +800 Increased | +38.00% | Mar 31, 2026 |
| 69 | OSAIC HOLDINGS | 0.18% | 199.73K | -17.35K Decreased | -7.99% | Mar 31, 2026 |
| 70 | CANADA PENSION PLAN INVESTMENT BOARD | 0.18% | 199.45K | -267.15K Decreased | -57.26% | Mar 31, 2026 |
| 71 | CW ADVISORS | 0.18% | 191.22K | +8.57K Increased | +4.69% | Jun 30, 2025 |
| 72 | GLENMEDE INVESTMENT MANAGEMENT | 0.17% | 188.19K | -109.25K Decreased | -36.73% | Sep 30, 2025 |
| 73 | VICTORY CAPITAL MANAGEMENT INC | 0.17% | 183.00K | +116.01K Increased | +1.73% | Mar 31, 2026 |
| 74 | HIGHTOWER ADVISORS | 0.17% | 181.60K | +24.13K Increased | +15.32% | Mar 31, 2026 |
| 75 | DRIEHAUS CAPITAL MANAGEMENT LLC | 0.16% | 173.95K | -780.21K Decreased | -81.77% | Mar 31, 2026 |
| 76 | WCM INVESTMENT MANAGEMENT | 0.15% | 165.02K | -7.35K Decreased | -4.26% | Mar 31, 2026 |
| 77 | THRIVENT FINANCIAL FOR LUTHERANS | 0.15% | 162.06K | +67.56K Increased | +71.50% | Mar 31, 2026 |
| 78 | GLENMEDE TRUST CO NA | 0.15% | 159.13K | -13.40K Decreased | -7.77% | Mar 31, 2026 |
| 79 | 0.15% | 158.70K | -18.89K Decreased | -10.64% | Mar 31, 2026 | |
| 80 | SEGALL BRYANT & HAMILL | 0.14% | 157.45K | +49.02K Increased | +45.21% | Mar 31, 2026 |
Showing 80 of 120 matching institutional rows.Load more institutions
Recent insider transactions
Rambus Inc (RMBS) Form 4 filings
Action codes are translated so open-market buys and sales are separate from awards, gifts, conversions, and tax withholding.
SAYINER, NECIP
Director
- Shares
- 5.00K
- % company
- <0.01%
- Price
- $170.15
- Value
- $850,750
Filed Jun 3, 2026
HIGASHI, EMIKO
Director
- Shares
- 5.00K
- % company
- <0.01%
- Price
- $158.00
- Value
- $790,000
Filed Jun 2, 2026
HIGASHI, EMIKO
Director
- Shares
- 5.00K
- % company
- <0.01%
- Price
- $163.00
- Value
- $815,000
Filed Jun 2, 2026
STANG, ERIC B
Director
- Shares
- 5.00K
- % company
- <0.01%
- Price
- $146.00
- Value
- $730,000
Filed Jun 1, 2026
FAN, XIANZHI SEAN
EVP, COO
- Shares
- 37.81K
- % company
- 0.03%
- Price
- $151.69
- Value
- $5,735,991
Filed May 26, 2026
HIGASHI, EMIKO
Director
- Shares
- 5.00K
- % company
- <0.01%
- Price
- $157.57
- Value
- $787,851
Filed May 26, 2026
FAN, XIANZHI SEAN
EVP, COO
- Shares
- 100
- % company
- <0.01%
- Price
- $152.35
- Value
- $15,235
Filed May 26, 2026
SHINN, JOHN
SVP, General Counsel
- Shares
- 1.00K
- % company
- <0.01%
- Price
- $143.63
- Value
- $143,630
Filed May 22, 2026
SAYINER, NECIP
Director
- Shares
- 9.82K
- % company
- <0.01%
- Price
- $130.18
- Value
- $1,278,888
Filed May 8, 2026
LAUB, STEVEN
Director
- Shares
- 1.50K
- % company
- <0.01%
- Price
- $125.52
- Value
- $188,279
Filed May 7, 2026
GAGNEJA, SUMEET
SVP, CFO
- Shares
- 14.52K
- % company
- 0.01%
- Price
- No cash value
- Value
- No cash value
Filed May 1, 2026
GAGNEJA, SUMEET
SVP, CFO
- Shares
- 26.80K
- % company
- 0.02%
- Price
- No cash value
- Value
- No cash value
Filed May 1, 2026
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | SAYINER, NECIP Director | <0.01% | Sale to issuer | 5.00K | $170.15 | $850,750 | Jun 3, 2026 |
| 2 | HIGASHI, EMIKO Director | <0.01% | Sale to issuer | 5.00K | $158.00 | $790,000 | Jun 2, 2026 |
| 3 | HIGASHI, EMIKO Director | <0.01% | Sale to issuer | 5.00K | $163.00 | $815,000 | Jun 2, 2026 |
| 4 | STANG, ERIC B Director | <0.01% | Sale to issuer | 5.00K | $146.00 | $730,000 | Jun 1, 2026 |
| 5 | FAN, XIANZHI SEAN EVP, COO | 0.03% | Sale to issuer | 37.81K | $151.69 | $5,735,991 | May 26, 2026 |
| 6 | HIGASHI, EMIKO Director | <0.01% | Sale to issuer | 5.00K | $157.57 | $787,851 | May 26, 2026 |
| 7 | FAN, XIANZHI SEAN EVP, COO | <0.01% | Sale to issuer | 100 | $152.35 | $15,235 | May 26, 2026 |
| 8 | SHINN, JOHN SVP, General Counsel | <0.01% | Sale to issuer | 1.00K | $143.63 | $143,630 | May 22, 2026 |
| 9 | SAYINER, NECIP Director | <0.01% | Sale to issuer | 9.82K | $130.18 | $1,278,888 | May 8, 2026 |
| 10 | LAUB, STEVEN Director | <0.01% | Sale to issuer | 1.50K | $125.52 | $188,279 | May 7, 2026 |
| 11 | GAGNEJA, SUMEET SVP, CFO | 0.01% | Award / grant | 14.52K | No cash value | No cash value | May 1, 2026 |
| 12 | GAGNEJA, SUMEET SVP, CFO | 0.02% | Award / grant | 26.80K | No cash value | No cash value | May 1, 2026 |
Showing 12 of 120 matching Form 4 rows. Percent of company uses current shares outstanding when available.Load more insiders
Frequently asked
Common questions.
Who are the largest RMBS shareholders?
BLACKROCK is the largest institutional holder in the loaded RMBS ownership dataset, with 16.31 million shares, or about 15.01% of shares outstanding. The table ranks additional institutions by reported share count.
What is institutional ownership of RMBS?
The current TECHi snapshot has 120 loaded institutional rows for Rambus Inc. 67 rows are marked increased or initiated, while 52 rows are marked decreased, with the latest holder filing dated Mar 31, 2026.
Where can I see Rambus Inc insider transactions?
The insider transaction table currently shows 120 loaded Form 4 rows for RMBS, with the latest insider filing dated Jun 3, 2026. It separates purchases, sales, option exercises, awards, gifts, and tax withholding so administrative transactions are not confused with open-market trades.
Are RMBS insiders buying or selling?
The loaded RMBS Form 4 rows currently read Net selling: 87 sale rows and 0 purchase rows. Awards, gifts, conversions, and tax withholding are shown separately because they do not carry the same signal as open-market buying or selling.
Who is the most active RMBS insider in the loaded filings?
SERAPHIN, LUC is the most active insider by absolute share movement in the loaded RMBS rows, with 779,643 shares moving across the visible filing history. Review the action labels before treating that activity as buying or selling.