Across its top 20 institutional holders, RMBS's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 5/100, avg. turnover score 20/100).

Quarterly Activity

Recent Activity

+$5.6B

Total Buy Value

$3.6B

Total Sell Value

New buy73

Trim207

Add187

Sold out76

260

Net Buyers

283

Net Sellers

Smart Money Convergence

RMBS does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.

13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.

AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/RMBS

Insider Trading (Form 4)

Form 144 Pre-Sale Notices

Filings (90d)

$851K

Total Est. Value

5K shares

Planned Shares

Last Filed 2026-06-03

Filer	Title/Relationship	Filing Date	Planned Shares	Est. Value
Sayiner Necip	Officer	2026-06-03	5K shares	$851K

Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。

Beneficial Ownership (13D/13G)

No Schedule 13D/13G filings for this ticker

Material Events (8-K)

No Form 8-K filings for this ticker

CUSIP

750917106

FAQ

Who are the top institutional investors holding RAMBUS INC (RMBS)?

Major stakeholders currently include BlackRock, Inc. ($1.4B), Vanguard Portfolio Management LLC ($571.6M), Invesco Ltd. ($559.1M). Based on the latest 13F filings, there are a total of 552 tracked investment funds and institutions maintaining positions in RMBS.

What is the overall institutional sentiment toward RMBS recently?

Institutional sentiment appears Bearish (Net Selling). During the most recent reporting quarter, the stock experienced a net outflow of $384.4M, driven by 260 managers accumulating shares while 283 reduced their exposure.

Which institutions have been selling or reducing their RMBS positions?

In the latest period, 207 funds trimmed their holdings, and 76 managers completely exited their positions. The aggregate reported sell value was $3.6B.

Are there any notable investors adding RMBS to their portfolios?

Yes, buying activity remains notable. 73 institutions opened new positions in {ticker}, and 187 existing holders added to their shares. The total reported buy value for the quarter amounted to $5.6B.