Rambus Inc (RMBS) Ownership

43.13 ↓3.03 (-6.55%)
As of December 31, 1969, 7:00pm EST.

Institutional Ownership

BlackRock Inc is the biggest individual institutional holder of Rambus Inc (RMBS), owning a total of 14.1 million shares. Combined, the top 38 institutional holders of RMBS own 88.87% of the company with a total of 95.5 million shares.

In the latest ownership report on December 31st 2024, the top 38 institutional holders increased their combined ownership of RMBS by 3.6 million shares. 11 institutions bought 8,597,821 total additional shares and increased their ownership by an average of 61.05%. However 10 institutions sold 4,980,220 total shares and decreased their ownership by an average of 10.61%.

Overall this is a positive sign as the number of shares owned by the top 20 institutional holders of Rambus increased by a net total of 3,617,601 in the latest quarter.

Institution Ownership Chart

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Latest Institutional Ownership Changes

OwnerPercent OwnedPercent ChangeShares OwnedShare ChangeDate Reported
BlackRock Inc13.159%3.256%14,139,062445,8782024-12-31
Vanguard Group Inc11.722%0.252%12,594,97931,6452024-12-31
T. Rowe Price Associates, Inc.5.072%442.752%5,449,1284,445,1462024-12-31
Amvescap Plc.4.653%72.061%4,999,7482,093,9532024-12-31
State Street Corp4.409%-1.696%4,737,415-81,7102024-12-31
JPMorgan Chase & Co3.894%-49.162%4,184,370-4,046,4202024-12-31
Geode Capital Management, LLC2.399%-1.685%2,577,185-44,1572024-12-31
Bank of New York Mellon Corp1.951%-3.108%2,095,974-67,2252024-12-31
NORGES BANK1.662%38.764%1,785,242498,7102024-12-31
Dimensional Fund Advisors, Inc.1.614%-1.536%1,734,188-27,0602024-12-31
Swedbank AB1.582%-2.467%1,700,000-43,0002024-12-31
Neuberger Berman Group LLC1.543%-5.088%1,658,364-88,8992024-12-31
Northern Trust Corp1.362%13.222%1,463,338170,8842024-12-31
Westfield Capital Management Company, L.P.1.293%54.011%1,389,538487,3022024-12-31
Charles Schwab Investment Management Inc1.163%0.463%1,249,7465,7612024-12-31
Wellington Management Company LLP1.162%-14.416%1,248,445-210,2862024-12-31
American Century Companies Inc1.095%6.759%1,176,35274,4782024-12-31
Westwood Holdings Group Inc1.050%-21.123%1,127,854-302,0422024-12-31
ING Investment Management LLC1.047%-5.815%1,124,441-69,4212024-12-31
Nuveen Asset Management, LLC0.991%12.237%1,064,700116,0792024-12-31
Goldman Sachs Group Inc0.984%27.774%1,048,840227,9852024-12-31

Top Institutions

OwnerPercent OwnedPercent ChangeShares OwnedShare ChangeDate Reported
BlackRock Inc13.159%3.256%14,139,062445,8782024-12-31
Vanguard Group Inc11.722%0.252%12,594,97931,6452024-12-31
T. Rowe Price Associates, Inc.5.072%442.752%5,449,1284,445,1462024-12-31
Amvescap Plc.4.653%72.061%4,999,7482,093,9532024-12-31
State Street Corp4.409%-1.696%4,737,415-81,7102024-12-31
State Street Corporation4.120%4.330%4,436,516184,1302024-03-31
JPMorgan Chase & Co3.894%-49.162%4,184,370-4,046,4202024-12-31
Geode Capital Management, LLC2.399%-1.685%2,577,185-44,1572024-12-31
Lord, Abbett & Co LLC2.302%64.325%2,499,638978,4842023-12-31
Hood River Capital Management LLC2.032%5.710%2,165,548116,9762024-06-30
Bank of New York Mellon Corp1.951%-3.108%2,095,974-67,2252024-12-31
Whale Rock Capital Management LLC1.754%146.816%1,885,1371,121,3552023-09-30
NORGES BANK1.662%38.764%1,785,242498,7102024-12-31
Dimensional Fund Advisors, Inc.1.614%-1.536%1,734,188-27,0602024-12-31
Swedbank AB1.582%-2.467%1,700,000-43,0002024-12-31
Neuberger Berman Group LLC1.543%-5.088%1,658,364-88,8992024-12-31
Ameriprise Financial Inc1.517%12.013%1,633,098175,1492024-03-31
Morgan Stanley - Brokerage Accounts1.493%-3.733%1,590,777-61,6872024-09-30
Polar Capital Holdings PLC1.392%6.867%1,511,52197,1272023-12-31
Northern Trust Corp1.362%13.222%1,463,338170,8842024-12-31
Vaughan Nelson Scarbrgh & Mccullough LP1.373%32.300%1,462,932357,1602024-09-30
Westfield Capital Management Company, L.P.1.293%54.011%1,389,538487,3022024-12-31
Loomis, Sayles & Company LP1.169%-10.886%1,269,321-155,0602023-12-31
Assenagon Asset Management SA1.189%339.301%1,266,780978,4172024-09-30
Charles Schwab Investment Management Inc1.163%0.463%1,249,7465,7612024-12-31
Wellington Management Company LLP1.162%-14.416%1,248,445-210,2862024-12-31
American Century Companies Inc1.095%6.759%1,176,35274,4782024-12-31
Silvercrest Asset Management Group LLC1.068%-3.043%1,165,340-36,5722023-03-31
Acadian Asset Management LLC1.060%0.000%1,154,0391,154,0392022-09-30
Westwood Holdings Group Inc1.050%-21.123%1,127,854-302,0422024-12-31
ING Investment Management LLC1.047%-5.815%1,124,441-69,4212024-12-31
CapTrust Financial Advisors1.028%-12.993%1,095,394-163,5822024-06-30
D. E. Shaw & Co LP0.981%-12.500%1,070,599-152,9482023-03-31
Nuveen Asset Management, LLC0.991%12.237%1,064,700116,0792024-12-31
Goldman Sachs Group Inc0.984%27.774%1,048,840227,9852024-12-31
Principal Financial Group Inc0.861%41.562%939,302275,7742023-06-30
Millennium Management LLC0.879%2,413.810%936,596899,3382024-09-30
Shannon River Fund Management LLC0.847%16.461%910,556128,7012022-06-30

Mutual Fund Ownership

Sapphire Star Capital Small Cap Growth is the biggest individual fund holder of Rambus Inc (RMBS), owning a total of 9.1 million shares. Combined, the top 56 mutual fund holders of RMBS own 80.65% of the company with a total of 86.9 million shares.

In the latest ownership report on February 28th 2025, the top 56 fund holders increased their combined ownership of RMBS by 186 thousand shares. 5 funds bought 27,692 total additional shares and increased their ownership by an average of 0.34%. However 4 funds sold 214,088 total shares and decreased their ownership by an average of 2.71%.

Overall this is a negative sign as the number of shares owned by the top 20 mutual funds holding Rambus decreased by a net total of -186,396 in the latest report.

Mutual Funds Chart

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Latest Mutual Fund Ownership Changes

OwnerPercent OwnedPercent ChangeShares OwnedShare ChangeDate Reported
iShares Core S&P Mid-Cap ETF3.225%0.075%3,465,1942,5992025-02-28
Vanguard Total Stock Mkt Idx Inv3.121%0.307%3,352,84210,2752025-02-28
iShares Russell 2000 ETF2.564%-1.163%2,755,156-32,4122025-02-28
Vanguard Small Cap Index2.533%0.083%2,721,0252,2512025-02-28
Vanguard Information Technology ETF1.621%-8.975%1,741,939-171,7462025-02-28
Vanguard Institutional Extnd Mkt Idx Tr1.506%0.271%1,618,5734,3702025-02-28
Vanguard Small Cap Growth Index Inv1.422%-0.573%1,528,016-8,8072025-02-28
Swedbank Robur Technology A1.396%0.000%1,500,00002025-02-28
iShares Russell 2000 Growth ETF0.885%-0.118%951,227-1,1232025-02-28
SPDR® S&P MIDCAP 400 ETF Trust0.801%0.961%861,0038,1972025-02-28

Top Mutual Funds

OwnerPercent OwnedPercent ChangeShares OwnedShare ChangeDate Reported
Sapphire Star Capital Small Cap Growth8.382%1,563,590.000%9,147,5779,146,9922023-06-30
iShares Core S&P Small-Cap ETF6.758%-0.089%7,265,835-6,4922023-11-30
iShares Core S&P Mid-Cap ETF3.225%0.075%3,465,1942,5992025-02-28
Vanguard Total Stock Mkt Idx Inv3.121%0.307%3,352,84210,2752025-02-28
Vanguard Instl Ttl Stck Mkt Idx Tr3.090%1.881%3,321,47261,3332023-03-31
T. Rowe Price Integrated US SmCapGrEq2.577%280.446%2,769,1242,041,2622024-12-31
iShares Russell 2000 ETF2.564%-1.163%2,755,156-32,4122025-02-28
Invesco Small Cap Value A2.561%0.000%2,751,21602025-01-31
Vanguard Small Cap Index2.533%0.083%2,721,0252,2512025-02-28
iShares Semiconductor ETF1.645%-0.302%1,771,582-5,3722024-08-30
Invesco Value Opportunities A1.628%0.000%1,749,70002025-01-31
Vanguard Information Technology ETF1.621%-8.975%1,741,939-171,7462025-02-28
Vanguard Institutional Extnd Mkt Idx Tr1.506%0.271%1,618,5734,3702025-02-28
T. Rowe Price US Mid-Cap Value Equity1.481%0.000%1,590,7521,590,7522024-12-31
T. Rowe Price Mid-Cap Value1.479%-0.074%1,589,576-1,1762025-01-31
Vanguard Small Cap Growth Index Inv1.422%-0.573%1,528,016-8,8072025-02-28
Swedbank Robur Technology A1.396%0.000%1,500,00002025-02-28
Vanguard Extended Market Index Investor1.361%0.413%1,485,5786,1122023-08-31
T. Rowe Price Integrated US Sm Gr Eq1.289%0.000%1,384,56202025-01-31
Neuberger Berman Intrinsic Value Instl1.242%0.000%1,335,06102022-12-31
Vanguard Explorer Inv1.221%2,500.090%1,314,5821,264,0232024-06-30
JPMorgan Mid Cap Growth I1.140%0.000%1,224,94602025-01-31
JPM US Mid Cap Growth-Composite1.140%-0.540%1,224,946-6,6512024-12-31
Hood River Small-Cap Growth Instl1.067%14.639%1,136,944145,1852024-06-30
Columbia Seligman Tech & Info A1.025%0.000%1,119,00002023-08-31
iShares S&P Small-Cap 600 Growth ETF1.033%0.000%1,110,21602023-11-30
Fidelity Small Cap Index1.000%-2.650%1,074,015-29,2372024-12-31
Fidelity® Small Cap Index0.978%2.809%1,051,85328,7432023-10-31
Vanguard Small Cap Value Index Inv0.896%-0.324%978,150-3,1802023-08-31
JPM US Technology A (dist) USD0.902%-1.144%971,258-11,2402024-07-31
Polar Capital Global Tech Inc0.890%-13.085%965,794-145,4002024-01-31
Direxion Daily Semicondct Bull 3X ETF0.893%0.047%961,1964522024-08-29
iShares Russell 2000 Growth ETF0.885%-0.118%951,227-1,1232025-02-28
SPDR® Portfolio S&P 600 Sm Cap ETF0.845%-0.186%908,304-1,6922023-11-30
Vanguard Tax-Managed Small Cap Adm0.813%0.000%873,78402023-11-30
SPDR® S&P MIDCAP 400 ETF Trust0.801%0.961%861,0038,1972025-02-28
T. Rowe Price U.S. Mid-Cap Val Eq Tr-Z0.790%0.000%849,048849,0482024-12-31
Lord Abbett & Co. Growth Equity- SA0.778%0.000%845,088845,0882023-12-31
Lord Abbett Growth Leaders I0.775%-0.455%841,240-3,8482024-01-31
JPM US Mid Cap Growth-MA0.776%163.357%833,789517,1892023-09-30
Lord Abbett Developing Growth A0.767%-1.254%832,823-10,5782024-01-31
Hartford MidCap Y0.755%-2.448%812,421-20,3852024-08-31
Westwood Quality SmallCap Fund Inst0.735%-5.613%790,226-46,9972022-09-30
Neuberger Berman Intrinsic Value I0.709%0.000%773,44102023-07-31
Loomis Sayles Small Cap Growth Instl0.705%0.000%766,97002023-05-31
Columbia Seligman Technology Growth0.709%-31.850%762,600-356,4002023-09-30
Columbia Small Cap Growth Inst0.703%0.000%755,65702023-11-30
Westwood Mgt SmallCap Value0.703%-9.762%755,492-81,7312022-09-30
iShares S&P Mid-Cap 400 Growth ETF0.696%0.636%750,4984,7392024-05-30
American Century U.S. Small Cap Growth0.693%0.000%738,89502024-09-30
American Century Small Cap Growth Inv0.693%0.000%738,89502024-09-30
JPMorgan Small Cap Growth A0.692%-0.723%737,635-5,3732024-11-30
SPDR® S&P Semiconductor ETF0.688%0.000%733,13402024-12-31
DFA US Micro Cap I0.648%0.000%705,71002023-01-31
Invesco Discovery A0.642%31.287%690,162164,4732023-12-31
DFA US Small Cap I0.581%0.000%632,27902023-02-28

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