RAMBUS INC (RMBS) — Institutional Holders, Q2 2026

624 institutional investment managers reported a RMBS position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $13.3B. Every filer is listed below, ranked by position value, 100 per page; this page shows ranks 1 to 100. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.

← RMBS stock profile

RMBS in Q2 2026: what funds did

Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.

New positions

135

Added to

188

Trimmed

229

Sold out

Biggest buyers

FMRAdded · +7,141,577 sh+$948.0M
D. E. ShawAdded · +726,896 sh+$96.5M
MANUFACTURERS LIFE INSURANCE COMPANY, THEAdded · +694,792 sh+$92.2M
SUSQUEHANNA INTERNATIONAL GROUP, LLPAdded · +470,111 sh+$62.4M
HRT FINANCIALNew · +423,352 sh+$56.2M

Biggest sellers

T. Rowe Price Investment ManagementSold out · -2,391,020 sh-$317.4M
BlackRockTrimmed · -2,340,829 sh-$310.7M
EdgePoint Investment GroupTrimmed · -861,529 sh-$114.4M
GEODE CAPITAL MANAGEMENTTrimmed · -826,835 sh-$109.8M
Hood River Capital ManagementSold out · -727,494 sh-$96.6M

RMBS 13F holders ranked 1–100 of 624

Institutional investors reporting a position in RAMBUS INC on SEC Form 13F-HR for Q2 2026, ranked by reported value.
#	Institution	Shares	Value	% of portfolio	QoQShares vs Q1 2026
1	BlackRock#1 · 13,964,477 sh	13,964,477	$1.9B	0.03%	-14.4%
2	FMR#2 · 10,460,026 sh	10,460,026	$1.4B	0.06%	+215.2%
3	Invesco Ltd.#3 · 6,632,458 sh	6,632,458	$880.4M	0.07%	+2.1%
4	VANGUARD PORTFOLIO MANAGEMENT#4 · 6,068,516 sh	6,068,516	$805.5M	0.04%	-8.7%
5	VANGUARD CAPITAL MANAGEMENT#5 · 4,874,385 sh	4,874,385	$647.0M	0.01%	+1.0%
6	STATE STREET#6 · 3,915,113 sh	3,915,113	$519.5M	0.02%	-10.5%
7	PRICE T ROWE ASSOCIATES#7 · 3,334,512 sh	3,334,512	$442.6M	0.04%	-1.2%
8	GEODE CAPITAL MANAGEMENT#8 · 2,297,660 sh	2,297,660	$305.1M	0.02%	-26.5%
9	JPMORGAN CHASE#9 · 2,101,418 sh	2,101,418	$261.0M	0.01%	+14.4%
10	DIMENSIONAL FUND ADVISORS#10 · 1,719,400 sh	1,719,400	$228.2M	0.04%	-4.2%
11	Swedbank AB#11 · 1,646,500 sh	1,646,500	$218.6M	0.19%	+5.3%
12	NORGES BANK#12 · 1,532,622 sh	1,532,622	$203.4M	0.02%	—
13	MORGAN STANLEY#13 · 1,444,281 sh	1,444,281	$191.7M	0.01%	+19.0%
14	Neuberger Berman Group#14 · 1,311,777 sh	1,311,777	$173.4M	0.12%	+0.7%
15	BANK OF AMERICA#15 · 1,218,726 sh	1,218,726	$161.8M	0.01%	-10.5%
16	AQR CAPITAL MANAGEMENT#16 · 1,211,009 sh	1,211,009	$152.5M	0.05%	-3.2%
17	CHARLES SCHWAB INVESTMENT MANAGEMENT#17 · 1,109,132 sh	1,109,132	$147.2M	0.02%	-16.4%
18	EdgePoint Investment Group#18 · 1,086,213 sh	1,086,213	$144.2M	1.09%	-44.2%
19	Rafferty Asset Management#19 · 984,388 sh	984,388	$130.7M	0.30%	+32.0%
20	GOLDMAN SACHS GROUP#20 · 960,878 sh	960,878	$127.5M	0.01%	+4.2%
21	BESSEMER GROUP#21 · 958,929 sh	958,929	$127.3M	0.17%	-7.8%
22	NORTHERN#22 · 949,113 sh	949,113	$126.0M	0.01%	-28.9%
23	Bank of New York Mellon#23 · 828,233 sh	828,233	$109.9M	0.02%	+6.2%
24	MANUFACTURERS LIFE INSURANCE COMPANY, THE#24 · 797,195 sh	797,195	$105.8M	0.08%	+678.5%
25	CONGRESS ASSET MANAGEMENT#25 · 777,993 sh	777,993	$103.3M	—	-39.0%
26	PointState Capital#26 · 764,172 sh	764,172	$101.4M	1.30%	+9.0%
27	D. E. Shaw#27 · 739,701 sh	739,701	$98.2M	0.05%	+5676.7%
28	Fisher Asset Management#28 · 705,847 sh	705,847	$93.7M	0.03%	-4.4%
29	VANGUARD FIDUCIARY#29 · 699,213 sh	699,213	$92.8M	0.02%	-6.8%
30	BARCLAYS PLC#30 · 645,970 sh	645,970	$85.7M	0.02%	-41.0%
31	RAYMOND JAMES FINANCIAL#31 · 603,874 sh	603,874	$80.2M	0.02%	-23.7%
32	Clearbridge Investments#32 · 589,641 sh	589,641	$78.3M	0.06%	+1.1%
33	SUSQUEHANNA INTERNATIONAL GROUP, LLP#33 · 555,935 sh	555,935	$73.8M	<0.01%	+547.8%
34	CITIGROUP#34 · 532,402 sh	532,402	$70.7M	0.02%	-47.2%
35	OBERWEIS ASSET MANAGEMENT#35 · 527,016 sh	527,016	$70.0M	1.45%	+0.1%
36	Nuveen#36 · 496,422 sh	496,422	$65.9M	0.02%	-44.4%
37	MILLENNIUM MANAGEMENT#37 · 472,818 sh	472,818	$62.8M	0.02%	+234.6%
38	LOOMIS SAYLES & L P#38 · 470,934 sh	470,934	$62.5M	0.08%	-28.6%
39	PRINCIPAL FINANCIAL GROUP#39 · 429,951 sh	429,951	$57.1M	0.03%	+15.1%
40	HRT FINANCIAL#40 · 430,152 sh	430,152	$56.2M	0.14%	New
41	WELLINGTON MANAGEMENT GROUP LLP#41 · 418,533 sh	418,533	$55.6M	<0.01%	-51.1%
42	Stephens Investment Management Group#42 · 409,436 sh	409,436	$54.3M	0.58%	+0.4%
43	Nykredit A/S#43 · 406,702 sh	406,702	$54.0M	0.17%	—
44	CITADEL ADVISORS#44 · 400,151 sh	400,151	$53.1M	<0.01%	+2325.9%
45	WESTFIELD CAPITAL MANAGEMENT#45 · 385,811 sh	385,811	$51.2M	0.17%	+2572.6%
46	UBS Group AG#46 · 373,590 sh	373,590	$49.6M	<0.01%	-60.9%
47	Maple Rock Capital Partners#47 · 342,600 sh	342,600	$45.5M	0.89%	New
48	CANADA PENSION PLAN INVESTMENT BOARD#48 · 330,648 sh	330,648	$43.9M	0.02%	+65.8%
49	AMERIPRISE FINANCIAL#49 · 321,195 sh	321,195	$42.6M	<0.01%	-67.1%
50	Champlain Investment Partners#50 · 299,368 sh	299,368	$39.7M	1.02%	-16.2%
51	RHUMBLINE ADVISERS#51 · 296,916 sh	296,916	$39.4M	0.03%	-7.1%
52	Shannon River Fund Management#52 · 291,713 sh	291,713	$38.7M	3.46%	-12.6%
53	UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME#53 · 289,022 sh	289,022	$38.4M	<0.01%	+20.1%
54	Jupiter Topco#54 · 288,553 sh	288,553	$38.3M	0.02%	—
55	CAISSE DE DEPOT ET PLACEMENT DU QUEBEC#55 · 282,580 sh	282,580	$37.5M	0.05%	-37.0%
56	NOMURA ASSET MANAGEMENT INTERNATIONAL#56 · 271,982 sh	271,982	$36.1M	0.05%	-16.8%
57	TimesSquare Capital Management#57 · 267,705 sh	267,705	$35.5M	0.52%	-14.3%
58	SEI INVESTMENTS#58 · 261,830 sh	261,830	$34.8M	0.03%	-23.0%
59	WESTWOOD GROUP#59 · 260,065 sh	260,065	$34.5M	0.26%	-29.6%
60	FIRST ADVISORS#60 · 258,308 sh	258,308	$34.3M	0.02%	-15.9%
61	GILDER GAGNON HOWE#61 · 257,434 sh	257,434	$34.2M	0.35%	New
62	EMERALD ADVISERS#62 · 252,693 sh	252,693	$33.5M	0.79%	-48.8%
63	MACKENZIE FINANCIAL#63 · 242,194 sh	242,194	$32.1M	0.03%	+351.1%
64	CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM#64 · 230,004 sh	230,004	$30.5M	0.02%	+1.2%
65	TWO SIGMA INVESTMENTS#65 · 222,921 sh	222,921	$29.6M	0.02%	+188.0%
66	BNP PARIBAS FINANCIAL MARKETS#66 · 220,814 sh	220,814	$29.3M	0.01%	-16.5%
67	Swiss National Bank#67 · 217,000 sh	217,000	$28.8M	0.02%	+1.9%
68	Allianz Asset Management GmbH#68 · 243,202 sh	243,202	$28.2M	0.03%	+172.9%
69	VICTORY CAPITAL MANAGEMENT#69 · 208,063 sh	208,063	$27.6M	0.02%	+13.7%
70	WILLIAM BLAIR INVESTMENT MANAGEMENT#70 · 200,116 sh	200,116	$26.6M	0.08%	New
71	Toroso Investments#71 · 180,833 sh	180,833	$24.0M	0.04%	+44.3%
72	Ranger Investment Management, L.P.#72 · 176,692 sh	176,692	$23.5M	1.48%	-21.2%
73	Duquesne Family Office#73 · 173,000 sh	173,000	$23.0M	0.44%	New
74	ROYAL BANK OF CANADA#74 · 169,479 sh	169,479	$22.5M	<0.01%	+473.7%
75	VAN ECK ASSOCIATES#75 · 167,993 sh	167,993	$22.3M	0.01%	+15.7%
76	Russell Investments Group, Ltd.#76 · 162,179 sh	162,179	$21.5M	0.02%	+24.9%
77	SEGALL BRYANT & HAMILL#77 · 160,293 sh	160,293	$21.3M	0.25%	New
78	LORD, ABBETT#78 · 158,260 sh	158,260	$21.0M	0.06%	-59.1%
79	TUDOR INVESTMENT ET AL#79 · 157,155 sh	157,155	$20.9M	0.03%	New
80	Mirae Asset Global Investments , Ltd.#80 · 154,872 sh	154,872	$20.6M	0.03%	+15.3%
81	Legal & General Group Plc#81 · 153,857 sh	153,857	$20.4M	<0.01%	-3.1%
82	Handelsbanken Fonder AB#82 · 150,857 sh	150,857	$20.0M	0.06%	+28.1%
83	LOS ANGELES CAPITAL MANAGEMENT#83 · 150,204 sh	150,204	$19.9M	0.07%	+1052.9%
84	DRIEHAUS CAPITAL MANAGEMENT#84 · 144,875 sh	144,875	$19.2M	0.11%	-16.7%
85	Retirement Systems of Alabama#85 · 141,345 sh	141,345	$18.8M	0.06%	+7.1%
86	EMERALD MUTUAL FUND ADVISERS#86 · 139,275 sh	139,275	$18.5M	0.65%	-54.7%
87	OSAIC#87 · 137,170 sh	137,170	$18.2M	0.02%	-31.3%
88	HighTower Advisors#88 · 132,484 sh	132,484	$17.6M	0.02%	-27.0%
89	THRIVENT FINANCIAL FOR LUTHERANS#89 · 129,787 sh	129,787	$17.2M	0.03%	-19.9%
90	WCM INVESTMENT MANAGEMENT#90 · 130,986 sh	130,986	$16.2M	0.03%	-20.6%
91	MUTUAL OF AMERICA CAPITAL MANAGEMENT#91 · 121,491 sh	121,491	$16.1M	—	-8.4%
92	Creative Planning#92 · 120,191 sh	120,191	$16.0M	<0.01%	+17.5%
93	ASSETMARK#93 · 119,875 sh	119,875	$15.9M	—	-18.8%
94	VANGUARD ASSET MANAGEMENT, Ltd#94 · 103,541 sh	103,541	$13.7M	<0.01%	+6.5%
95	DF DENT#95 · 102,771 sh	102,771	$13.6M	0.26%	+0.9%
96	NOMURA#96 · 101,062 sh	101,062	$13.4M	0.02%	New
97	ALLIANCEBERNSTEIN L.P.#97 · 155,136 sh	155,136	$13.3M	<0.01%	-41.9%
98	SCHWARTZ INVESTMENT COUNSEL#98 · 100,000 sh	100,000	$13.3M	—	-76.2%
99	VOYA INVESTMENT MANAGEMENT#99 · 99,762 sh	99,762	$13.2M	0.01%	-87.0%
100	NORDEA INVESTMENT MANAGEMENT AB#100 · 104,479 sh	104,479	$13.1M	0.01%	-3.3%

Funds that sold out of RMBS in Q2 2026 (67)

Held RMBS at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.

Institutions that held RMBS in Q1 2026 and reported no position in Q2 2026.
Institution	Shares sold	Value in Q1 2026
T. Rowe Price Investment Management2,391,020 sh	2,391,020	$205.7M
Hood River Capital Management727,494 sh	727,494	$62.6M
STEADFAST CAPITAL MANAGEMENT153,250 sh	153,250	$13.2M
TD ASSET MANAGEMENT120,282 sh	120,282	$10.3M
Tairen Capital Ltd120,000 sh	120,000	$10.3M
OSTERWEIS CAPITAL MANAGEMENT84,930 sh	84,930	$7.3M
FRED ALGER MANAGEMENT66,862 sh	66,862	$5.8M
Munro Partners64,395 sh	64,395	$5.5M
THORNBURG INVESTMENT MANAGEMENT58,106 sh	58,106	$5.0M
Holocene Advisors49,604 sh	49,604	$4.3M
AI-Squared Management Ltd49,578 sh	49,578	$4.3M
MOODY ALDRICH PARTNERS37,335 sh	37,335	$3.2M
Future Fund34,386 sh	34,386	$3.0M
South Dakota Investment Council28,613 sh	28,613	$2.5M
Element Squared23,567 sh	23,567	$2.0M
Capstone Capital Management Ltd23,326 sh	23,326	$2.0M
COOKSON PEIRCE17,328 sh	17,328	$1.5M
WESBANCO BANK14,300 sh	14,300	$1.2M
Sunstone Asset Management, L.P.11,746 sh	11,746	$1.0M
Aurora Investment Counsel10,883 sh	10,883	$936.3K
BAILARD9,375 sh	9,375	$806.5K
TWO SIGMA SECURITIES8,849 sh	8,849	$761.3K
Inspire Advisors7,383 sh	7,383	$635.1K
CHOREO6,578 sh	6,578	$565.9K
Monolith Management Ltd6,200 sh	6,200	$533.4K
China Universal Asset Management , Ltd.6,000 sh	6,000	$516.2K
Systematic Alpha Investments5,300 sh	5,300	$456.0K
QVT Financial4,648 sh	4,648	$399.9K
Qsemble Capital Management4,529 sh	4,529	$389.6K
Savvy Advisors4,308 sh	4,308	$370.6K
Ground Swell Capital3,613 sh	3,613	$310.8K
Blackstone3,314 sh	3,314	$285.1K
FOCUSED ALPHA3,269 sh	3,269	$281.2K
BAMCO3,111 sh	3,111	$267.6K
WINTON GROUP Ltd3,051 sh	3,051	$262.5K
CHASE INVESTMENT COUNSEL3,018 sh	3,018	$259.0K
Centiva Capital2,995 sh	2,995	$257.7K
Abacus Wealth Partners2,898 sh	2,898	$249.3K
MIRABELLA FINANCIAL SERVICES LLP2,485 sh	2,485	$213.8K
Financiere des Professionnels - Fonds d,investissement2,299 sh	2,299	$197.8K
Stonehage Fleming Financial Services Ltd1,634 sh	1,634	$140.6K
Byrne Asset Management1,237 sh	1,237	$106.4K
Kemnay Advisory Services730 sh	730	$62.8K
Advisory Services Network665 sh	665	$57.2K
Bayforest Capital Ltd632 sh	632	$54.4K
Western Wealth Management509 sh	509	$43.8K
Optiver Holding B.V.480 sh	480	$41.3K
Steward Partners Investment Advisory411 sh	411	$35.4K
GROUP ONE TRADING, L.P.372 sh	372	$32.0K
UNIVERSITY OF TEXAS/TEXAS AM INVESTMENT MANAGEMENT308 sh	308	$26.5K
Tradewinds Capital Management296 sh	296	$25.5K
Wall Street Financial Group268 sh	268	$23.1K
Root Financial Partners247 sh	247	$21.2K
Innovative Asset Advisors Group126 sh	126	$10.8K
GLOBEFLEX CAPITAL L P101 sh	101	$8.7K
Global Asset Management100 sh	100	$8.6K
Crews Bank59 sh	59	$5.1K
Legacy Wealth Managment56 sh	56	$4.8K
Raleigh Capital Management21 sh	21	$1.8K
TWIN PEAKS WEALTH ADVISORS19 sh	19	$1.6K
CENTRAL17 sh	17	$1.5K
CULLEN/FROST BANKERS13 sh	13	$1.1K
Operose Advisors11 sh	11	$946.00
Rachor Investment Advisory Services9 sh	9	$775.00
Vermillion Wealth Management6 sh	6	$516.00
Intentional Wealth Strategies5 sh	5	$430.00
CURIO WEALTH3 sh	3	$258.00

Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.