Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

Rambus Inc Del (RMBS)

548 + Investors. Track Smart Money conviction in RMBS. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↑ +3
Streak
8Q ▲
Buyers last Q
48%

Smart Money Signals — RMBS

Based on 551 hedge funds · latest filing: 2026 Q1 · updated quarterly

📈

Buying streak — 8 quarters in a row

last 6Q
For 8 consecutive quarters, more hedge funds added RMBS than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
🏔️

At the ownership peak (100% of max)

100% of all-time peak
551 hedge funds hold RMBS right now — the highest count in 3.0 years. When ownership is this concentrated, any bad news can trigger a chain reaction: one big fund sells, others follow. This is a classic 'crowded trade' — high popularity doesn't equal safety.
🚀

Fast accumulation — +36% more funds vs a year ago

fund count last 6Q
+145 new funds entered over the past year (+36% YoY). That's a rapid rush of institutional money. Fast accumulation often signals a major thesis — but it also means the stock could fall quickly if that thesis breaks.
🟠

More sellers than buyers — 48% buying

268 buying290 selling
Last quarter: 290 funds reduced or exited vs 268 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.
⚠️

Fewer new buyers each quarter (-16 vs last Q)

new funds entering per quarter
Funds opening this position for the first time: 88 → 124 → 101 → 85. Each quarter fewer new institutions are entering. This usually means most funds that wanted in are already in — the stock is well-known but the pool of potential new buyers is shrinking.
🔒

49% of holders stayed for 2+ years

■ 49% conviction (2yr+) ■ 25% medium ■ 25% new
272 out of 551 hedge funds have held RMBS for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
➡️

Steady discovery — ~85 new funds/quarter

80 → 88 → 124 → 101 → 85 new funds/Q
New funds entering each quarter: 88 → 124 → 101 → 85. Consistent flow of new institutional buyers without clear acceleration or slowdown.
🏛️

Veteran-anchored — 58% veterans vs 32% newcomers

■ 58% veterans ■ 11% 1-2yr ■ 32% new
Entry-cohort mix of 564 holders: 325 (58%) are 2+ year veterans, 61 entered 1–2 years ago, and 178 (32%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.
🏆

Elite ownership — 43% AUM from top-100 funds

43% from top-100 AUM funds
63 of 550 holders are among the 100 largest funds by AUM, controlling 43% of total institutional value in RMBS. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.
4.1
out of 10
Moderate Exit Risk
Exit risk score 4.1/10 — some crowding factors present, but no critical concentration. Watch ownership trend over the next 1–2 quarters for direction.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — RMBS

In 2026 Q1, 268 hedge funds were net buyers of RMBS (85 opened a new position, 183 added to an existing one), while 290 reduced or exited (208 trimmed, 82 sold completely) — a 48% buyer ratio, indicating roughly balanced activity. This marks 8 consecutive quarters of net institutional buying — a persistent conviction signal. 43% of total institutional value in RMBS is held by top-100 AUM funds, reflecting elite-tier ownership quality. Net fund flow last quarter: +3 funds (more new holders than closures). Total institutional holders: 551.

Hedge Fund Ownership: RMBS

How many hedge funds hold RMBS — quarterly history vs. share price
Quarterly hedge fund ownership of RMBS vs. share price

Market Analysis: RMBS

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: RMBS

-- --

Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Is It Too Late to Buy Rambus Inc Del (RMBS) Based on Hedge Fund 13F Filings?

Signal Freshness measures how much RMBS has moved relative to its sector benchmark (XLK) since the 2026 Q1 13F filing. A stock that has barely outrun its sector is still a relatively fresh entry point — the fund's thesis has not yet been priced in by the broader market.

Since Quarter End March 31, 2026 · 77d ago
RMBS
+64.0%
XLK
+43.5%

RMBS outperformed XLK by +20.5% since March 31, 2026.

Since 13F Filing Date May 15, 2026 · 32d ago
RMBS
+11.1%
XLK
+8.2%

Since the filing became public, RMBS outperformed XLK by +2.9% .

Interpretation: The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference. Learn more →

Smart Money Signal ?
Broad Consensus, Selective Conviction

Many quality funds hold this stock, but top-tier positions remain relatively small.

40 top-rated funds 5 high-conviction
Consensus
7.0
/ 10
breadth
×
Elite
3.7
/ 10
conviction
Hedge Fund Positioning: RMBS
548 + Investors

Track Smart Money conviction in RMBS. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2026 Q1) Prior (2025 Q4) Change
Funds Holding 548 548 -
13F Shares 101M 100M 1.07%
Total Value $7.95B $8.71B -8.71%
New Positions 84 101 -17
Increased Positions 181 190 -9
Closed Positions 84 64 +20
Reduced Positions 204 191 +13
Total Calls 7 11 -36.36%
Total Puts 7 8 -12.5%
PUT/CALL Ratio 1.0 0.73 Neutral

Statistics: RMBS

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Short % of Float --

Financial Highlights

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Institutional Holders (2026 Q1)

548 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in RMBS. Verified SEC 13F-HR filings.

QUARTER:
Top 25 RMBS holders by conviction (% of portfolio weight) — 2026 Q1 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 Shannon River Fund Management LLC 5.48% 333,817 $28.7M
2 Deepwater Asset Management, LLC 3.16% 58,036 $5.0M
3 AI-Squared Management Ltd 3.10% 49,578 $4.3M
4 Aspetuck Financial Management LLC 2.25% 38,175 $3.3M
5 Alight Capital Management LP 2.06% 100,000 $8.6M
6 Capstone Capital Management Ltd 2.02% 23,326 $2.0M
7 AMJ Financial Wealth Management 1.55% 76,330 $6.6M
8 Ranger Investment Management, L.P. 1.40% 224,365 $19.3M
9 EdgePoint Investment Group Inc. 1.34% 1,947,742 $167.6M
10 Emerald Advisers, LLC 1.34% 493,236 $42.4M
11 Oberweis Asset Management Inc/ 1.34% 526,316 $45.3M
12 Schwartz Investment Counsel Inc 1.28% 420,337 $36.2M
13 Emerald Mutual Fund Advisers Trust 1.28% 307,248 $26.4M
14 Sunstone Asset Management, L.P. 1.19% 11,746 $1.0M
15 Granahan Investment Management, LLC 1.17% 280,246 $24.1M
16 Element Squared LLC 1.14% 23,567 $2.0M
17 Tairen Capital Ltd 1.12% 120,000 $10.3M
18 Future Fund LLC 1.04% 34,386 $3.0M
19 Investors Towarzystwo Funduszy Inwestycyjnych Spolka Akcyjna 0.91% 25,700 $2.2M
20 Gould Capital, LLC 0.82% 15,760 $1.4M
21 KERR FINANCIAL PLANNING Corp 0.81% 6,050 $661K
22 Congress Asset Management Co 0.79% 1,275,978 $109.8M
23 PointState Capital LP 0.76% 701,307 $60.3M
24 Hood River Capital Management LLC 0.63% 727,494 $62.6M
25 Ground Swell Capital, LLC 0.61% 3,613 $311K
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — Rambus Inc Del (RMBS)

What does the Smart Money Trend signal show for RMBS?

Buying streak — 8 quarters in a row: For 8 consecutive quarters, more hedge funds added RMBS than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.

What is the institutional breadth score for RMBS?

More sellers than buyers — 48% buying: Last quarter: 290 funds reduced or exited vs 268 that bought or added. When more than half of active funds are selling, it's a caution flag — especially if the stock price hasn't moved down yet.

What is the fund quality score for RMBS holders?

Elite ownership — 43% AUM from top-100 funds: 63 of 550 holders are among the 100 largest funds by AUM, controlling 43% of total institutional value in RMBS. When the biggest players dominate the cap table, it signifies deep institutional support — since mega-funds deploy the most rigorous due diligence and capital.

How long have hedge funds held RMBS?

49% of holders stayed for 2+ years: 272 out of 551 hedge funds have held RMBS for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Is it too late to buy Rambus Inc Del (RMBS) following the 2026 Q1 hedge fund 13F filings?

As of today, RMBS has moved +11.1% since the 2026 Q1 13F filing date (May 15, 2026), compared to +8.2% for the XLK sector ETF — an outperformance of +2.9%. Since the quarter end (March 31, 2026), RMBS has gained +64.0% vs +43.5% for XLK. The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.

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