Rambus RMBS Institutional Ownership

NASDAQ RMBS

$86.97 +1.62 (+1.90%)

At close: Sep 11, 2026 · 4:00 PM EDT

Institutions by Trading Activity

616 Institutions

Increased 325 52.8%

Unchanged 63 10.2%

Reduced 228 37.0%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

93.64%

▼-1.49 pp QoQ

Shares Held by Institutions

101.53Mn

of 108.43Mn outstanding

▲+3.85% QoQ

Shares Outstanding

108.43Mn

6.90Mn held outside 13F filers

Institutional Investors

616

filed 13F for Jun 2026

▲+63 vs prior quarter

Net Shares Added (QoQ)

+3.76Mn

accumulated since last quarter

Value of Holdings

$8.83Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Rambus Inc (NASDAQ:RMBS) appears in 616 institutional 13F filings for the quarter ending June 2026.

They owned 93.6% of outstanding stock in June 2026, down from 95.1% the prior quarter.
They increased total shares held in Rambus by 3.85% from the prior quarter, while the number of investors in RMBS increased 34.5% year over year.
Among the 616 funds, 325 bought more Rambus shares, 228 sold down, and 63 held their ground.
Combined, these investors held 101.53Mn shares in RMBS for June 2026, up by 3.76Mn shares quarter on quarter, and down 509.73K shares year over year.
BlackRock, Inc. is the top holder of Rambus as of June 30, 2026, with 13.96Mn shares representing 12.88% of outstanding stock.
The biggest buyers of Rambus for the quarter ending June 2026 included FMR LLC (7.14Mn), NORGES BANK (1.53Mn), Sixth Street Partners Management Company, L.P. (1.11Mn), D. E. Shaw & Co., Inc. (726.9K), MANUFACTURERS LIFE INSURANCE COMPANY, THE (694.79K).
Leading sellers of Rambus shares for the quarter ending June 2026 were BlackRock, Inc. (2.34Mn), EdgePoint Investment Group Inc. (861.53K), GEODE CAPITAL MANAGEMENT, LLC (826.84K), VOYA INVESTMENT MANAGEMENT LLC (666.02K), Ameriprise Financial Inc (654.01K).
Rambus's 10 largest shareholders as of June 2026 include BlackRock, Inc. (13.96Mn), FMR LLC (10.46Mn), Invesco Ltd. (6.63Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (6.07Mn), VANGUARD CAPITAL MANAGEMENT LLC (4.87Mn), State Street Corp (3.92Mn), PRICE T ROWE ASSOCIATES INC /MD/ (3.33Mn), GEODE CAPITAL MANAGEMENT, LLC (2.3Mn), Jpmorgan Chase & Co (2.1Mn), DIMENSIONAL FUND ADVISORS LP (1.72Mn) per Business Quant data.

Form 13F Holdings

616 Institutional Holders

Report period 30 Jun, 2026

Total shares held 101.53Mn

Of outstanding 93.64%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	13,964,477	12.88%	▼2,340,829	-14.36%	$1.85Bn
2	FMR LLC	0000315066	10,460,026	9.65%	▲7,141,577	+215.21%	$1.39Bn
3	Invesco Ltd.	0000914208	6,632,458	6.12%	▲133,410	+2.05%	$880.39Mn
4	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	6,068,516	5.60%	▼575,804	-8.67%	$805.53Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	4,874,385	4.50%	▲46,531	+0.96%	$647.03Mn
6	State Street Corp	0000093751	3,915,113	3.61%	▼458,504	-10.48%	$519.50Mn
7	PRICE T ROWE ASSOCIATES INC /MD/	0000080255	3,334,512	3.08%	▼42,177	-1.25%	$442.62K
8	GEODE CAPITAL MANAGEMENT, LLC	0001214717	2,297,660	2.12%	▼826,835	-26.46%	$305.06Mn
9	Jpmorgan Chase & Co	0000019617	2,101,418	1.94%	▲264,918	+14.43%	$260.99Mn
10	DIMENSIONAL FUND ADVISORS LP	0000354204	1,719,400	1.59%	▼75,895	-4.23%	$228.19Mn
11	Swedbank AB	0000946431	1,646,500	1.52%	▲83,500	+5.34%	$218.56Mn
12	NORGES BANK	0001374170	1,532,622	1.41%	▲1,532,622	0.00%	$203.44Mn
13	Morgan Stanley	0000895421	1,444,281	1.33%	▲231,084	+19.05%	$191.71Mn
14	Neuberger Berman Group LLC	0001465109	1,311,777	1.21%	▲9,608	+0.74%	$173.45Mn
15	Bank Of America Corp /De/	0000070858	1,218,726	1.12%	▼142,844	-10.49%	$161.77Mn
16	AQR CAPITAL MANAGEMENT LLC	0001167557	1,211,009	1.12%	▼39,447	-3.15%	$152.48Mn
17	CHARLES SCHWAB INVESTMENT MANAGEMENT INC	0000884546	1,109,132	1.02%	▼217,270	-16.38%	$147.23Mn
17	Sixth Street Partners Management Company, L.P.	0001812095	1,109,132	1.02%	▲1,109,132	0.00%	$147.23Mn
18	EdgePoint Investment Group Inc.	0001481669	1,086,213	1.00%	▼861,529	-44.23%	$144.18Mn
19	Rafferty Asset Management, LLC	0001389426	984,388	0.91%	▲238,869	+32.04%	$130.67Mn

Showing 1 to 20 of 616 holders