RMBS

RAMBUS INC
USCUSIP 750917106
Institutional Owners
206
+24 QoQ
13F Value Held
$2.3B
Insider Net · 180d
-$2.5M
0↑ 2↓
Recent Filings
2
Smart-money sentimentBearish
BearishBullish
13F funds (latest Q)60 adding · 36 trimming
Insider net (180d)−$2.5M
Price history not yet available for RMBS.

Top institutional holders

206 13F filers
#FundPosition valueSharesLast moveAs of
1VANGUARD PORTFOLIO MANAGEMENT LLC
$571.6M
6.64MNewQ1 2026
2VANGUARD CAPITAL MANAGEMENT LLC
$415.3M
4.83MNewQ1 2026
3STATE STREET CORP
$376.3M
4.37MAddedQ1 2026
4EdgePoint Investment Group Inc.
$167.6M
1.95MAddedQ1 2026
5VANGUARD FIDUCIARY TRUST CO
$64.5M
749.9KNewQ1 2026
6Rafferty Asset Management, LLC
$64.1M
745.5KReducedQ1 2026
7Hood River Capital Management LLC
$62.6M
727.5KAddedQ1 2026
8OBERWEIS ASSET MANAGEMENT INC/
$45.3M
526.3KAddedQ1 2026
9EMERALD ADVISERS, LLC
$42.4M
493.2KReducedQ1 2026
10PANAGORA ASSET MANAGEMENT INC
$37.5M
436.4KAddedQ1 2026
11SCHWARTZ INVESTMENT COUNSEL INC
$36.2M
420.3KAddedQ1 2026
12Stephens Investment Management Group LLC
$35.1M
407.8KAddedQ1 2026
13WESTWOOD HOLDINGS GROUP INC
$31.8M
369.1KAddedQ1 2026
14Champlain Investment Partners, LLC
$30.7M
357.2KNewQ1 2026
15EMERALD MUTUAL FUND ADVISERS TRUST
$26.4M
307.2KReducedQ1 2026
16Granahan Investment Management, LLC
$24.1M
280.2KAddedQ1 2026
17ArrowMark Colorado Holdings LLC
$22.5M
261.7KReducedQ1 2026
18SEGALL BRYANT & HAMILL, LLC
$13.5M
157.4KNewQ1 2026
19STEADFAST CAPITAL MANAGEMENT LP
$13.2M
153.3KNewQ1 2026
20ASSETMARK, INC
$12.7M
147.6KAddedQ1 2026
21Tidal Investments LLC
$10.1M
117.0KAddedQ1 2026
22INTECH INVESTMENT MANAGEMENT LLC
$9.8M
114.4KReducedQ1 2026
23MetLife Investment Management, LLC
$9.4M
109.8KReducedQ1 2026
24RENAISSANCE GROUP LLC
$9.1M
105.8KReducedQ1 2026
25DF DENT & CO INC
$8.8M
101.9KNewQ1 2026

Fund activity — latest quarter

Opened (NEW)
21
funds
Added
39
funds
Reduced
36
funds
Exited
0
funds

Insider activity (Form 4)

Full insider page →
Buys · 180d
$0
0 insiders
Sells · 180d
$2.5M
2 insiders
Net
-$2.5M
3 P/S txns
Signal
Net Selling
open-market
DateInsiderRoleActionSharesValue
Jun 3, 2026Sayiner NecipDirectorSell (S)5.0K$851K
Jun 2, 2026Higashi EmikoDirectorSell (S)5.0K$815K
Jun 2, 2026Higashi EmikoDirectorSell (S)5.0K$790K

Institutional ownership over time

198 funds+196 since Q2 2022
099198Q2 2022Q1 2023Q4 2023Q3 2024Q2 2025Q1 2026
funds holding aggregate valuelatest $1.7B

Funds that own RMBS also own

CompanyCo-held byCombined value
Nvidia Corp. (US)NVDA190 funds$279.5B
Microsoft CorporationMSFT190 funds$190.5B
Amazon.com, Inc.AMZN188 funds$139.0B
Meta Platforms, Inc.META186 funds$83.6B
Visa Inc. Class AV186 funds$41.5B
Apple, Inc.AAPL185 funds$242.7B
GOOGLE INCGOOGL185 funds$115.4B
Broadcom LtdAVGO184 funds$99.2B
Lilly Eli & CoLLY184 funds$52.0B
Tjx Cos IncTJX184 funds$14.4B
Walmart, Inc.WMT183 funds$36.9B
Servicenow Inc ComNOW182 funds$9.8B

Ranked by how many of RMBS's institutional holders also hold each name — a cross-fund conviction signal. Via the MCP server (ticker.co_held).

Recent filings

2 shown

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for RMBS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes. Every panel above is one call to the Arkolith API & MCP server.