RMBS — RAMBUS INC DEL COM

Ownership history in CAPITAL FUND MANAGEMENT S.A.  ·  69 quarters on record

AI Ownership Summary

CAPITAL FUND MANAGEMENT S.A. reported RAMBUS INC DEL COM (RMBS) in 69 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 0.04% in 2024 Q3. The latest visible filing shows RMBS at 0.00% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this RMBS ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was CAPITAL FUND MANAGEMENT S.A.'s position in RAMBUS INC DEL COM, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q4

RMBS was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.04% in 2024 Q3

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2023 Q4 to 2025 Q4

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

RMBS stock page CAPITAL FUND MANAGEMENT S.A. fund profile CAPITAL FUND MANAGEMENT S.A. full holdings
How CAPITAL FUND MANAGEMENT S.A. held RMBS — position size vs. price
% of Fund (quarterly)    RMBS price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 21 quarters  ▾
Quarter Action Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 11,400 -2,700 -19.1% 0.00% $1.0M 2026-02-14 (Est.) $101.95
2025 Q3 REDUCED 14,100 -15,271 -52.0% 0.00% $1.5M 2025-11-13 $92.37
2025 Q3 ADDED 29,371 +3,655 +14.2% 0.01% $3.1M 2025-11-13 $92.37
2025 Q2 REDUCED 25,716 -55,595 -68.4% 0.00% $1.6M 2025-08-13 $76.79
2025 Q1 ADDED 81,311 +69,411 +583.3% 0.01% $4.2M 2025-05-14 $57.65
2025 Q1 REDUCED 11,900 -235,093 -95.2% 0.00% $616K 2025-05-14 $57.65
2024 Q4 ADDED 246,993 +219,893 +811.4% 0.03% $13.1M 2025-02-13 $62.60
2024 Q4 ADDED 27,100 +12,200 +81.9% 0.00% $1.4M 2025-02-13 $62.60
2024 Q4 REDUCED 14,900 -3,600 -19.5% 0.00% $788K 2025-02-13 $62.60
2024 Q3 REDUCED 18,500 -303,851 -94.3% 0.00% $781K 2024-11-13 $54.32
2024 Q3 ADDED 322,351 +283,051 +720.2% 0.04% $13.6M 2024-11-13 $54.32
2024 Q3 REDUCED 39,300 -163,928 -80.7% 0.00% $1.7M 2024-11-13 $54.32
2024 Q2 ADDED 203,228 +188,028 +1237.0% 0.04% $11.9M 2024-08-13 $43.95
2024 Q2 REDUCED 15,200 -27,700 -64.6% 0.00% $893K 2024-08-13 $43.95
2024 Q2 ADDED 42,900 +30,000 +232.6% 0.01% $2.5M 2024-08-13 $43.95
2024 Q1 REDUCED 12,900 -35,100 -73.1% 0.00% $797K 2024-05-15 $59.52
2024 Q1 REDUCED 48,000 -53,032 -52.5% 0.01% $3.0M 2024-05-15 $59.52
2024 Q1 REDUCED 101,032 -18,768 -15.7% 0.02% $6.2M 2024-05-15 $59.52
2023 Q4 REDUCED 119,800 -24,896 -17.2% 0.02% $8.2M 2024-02-14 $57.02
2023 Q4 ADDED 144,696 +25,496 +21.4% 0.03% $9.9M 2024-02-14 $57.02
2023 Q4 ADDED 119,200 +50,400 +73.3% 0.02% $8.1M 2024-02-14 $57.02
48 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding RMBS

As of 2026 Q1 — sorted by position size

CONGRESS ASSET MANAGEMENT CO 3Y 7Y 0.79% TEALWOOD ASSET MANAGEMENT INC 3Y 7Y 0.74% MOODY ALDRICH PARTNERS LLC 3Y 7Y 0.58% Yorktown Management & Research Co Inc 3Y 7Y 0.5% WINCAP FINANCIAL LLC 0.38% M.E. ALLISON & CO., INC. 0.34% CAMPBELL NEWMAN ASSET MANAGEMENT INC 3Y 7Y 0.29% BNC WEALTH MANAGEMENT, LLC 3Y 0.24% Linden Thomas Advisory Services, LLC 3Y 0.22% Sanchez Gaunt Capital Management, LLC 0.18%

FAQ About CAPITAL FUND MANAGEMENT S.A. and RMBS

These are the practical questions this page is built to answer before you even open the full history table.

How long has CAPITAL FUND MANAGEMENT S.A. reported owning RMBS?

CAPITAL FUND MANAGEMENT S.A. reported RMBS across 21 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported RMBS position in CAPITAL FUND MANAGEMENT S.A.'s portfolio?

The largest reported portfolio weight for RMBS was 0.04% in 2024 Q3.

What is the latest reported RMBS position on this page?

The most recent filing on this page is 2025 Q4, when CAPITAL FUND MANAGEMENT S.A. reported 11,400 shares, equal to 0.00% of portfolio, with an estimated market value of $1.0M.

What does the chart on this RMBS ownership page compare?

The chart compares CAPITAL FUND MANAGEMENT S.A.'s quarterly RMBS portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

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