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Ken Griffin's Rambus Inc. (RMBS) position

Yes: as of Q1 2026, Ken Griffin holds 16K shares of RMBS worth $1.4M (0.0% of the disclosed portfolio). Held since at least Q1 2021; that opening coverage snapshot is not counted as a purchase.
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Current value
$1.4M
Shares held
16K
% of portfolio
0.0%
Est. average buy price (i)
$80.03
Quarter-end price
$86.03

Estimated trade prices

Average price in quarters with purchases
$57.28
Average prices in quarters with sales
  • Q1 2026: $99.79 (153K shares sold)
  • Q3 2025: $77.09 (84K shares sold)
  • Q1 2025: $58.74 (94K shares sold)
  • Q4 2024: $50.98 (73K shares sold)
  • Q1 2024: $63.29 (28K shares sold)
  • Q1 2022: $27.68 (4K shares sold)

RMBS price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$20$50$100$150$20020222023202420252026New position of 31K shares · Q4 2021. Average closing price $25.43 · Price range $21.80–$29.6831KsharespurchasedSold 4K shares (11.7%) · Q1 2022. Average closing price $27.68 · Price range $23.76–$33.604KsharessoldNew position of 41K shares · Q4 2022. Average closing price $33.82 · Price range $25.85–$38.7041KsharespurchasedNew position of 11K shares · Q2 2023. Average closing price $55.06 · Price range $44.34–$66.5211KsharespurchasedAdded 127K shares (over 1,000%) · Q3 2023. Average closing price $56.74 · Price range $49.28–$64.89127KsharespurchasedAdded 3K shares (2.2%) · Q4 2023. Average closing price $62.29 · Price range $48.23–$69.993KsharespurchasedSold 28K shares (20.0%) · Q1 2024. Average closing price $63.29 · Price range $53.62–$73.9928KsharessoldNew position of 185K shares · Q3 2024. Average closing price $48.47 · Price range $37.86–$66.26185KsharespurchasedSold 73K shares (39.3%) · Q4 2024. Average closing price $50.98 · Price range $40.13–$59.1473KsharessoldSold 94K shares (83.8%) · Q1 2025. Average closing price $58.74 · Price range $51.55–$68.5994KsharessoldAdded 134K shares (734.1%) · Q2 2025. Average closing price $53.58 · Price range $42.90–$64.02134KsharespurchasedSold 84K shares (54.9%) · Q3 2025. Average closing price $77.09 · Price range $62.85–$107.3884KsharessoldAdded 101K shares (147.3%) · Q4 2025. Average closing price $98.41 · Price range $87.28–$113.61101KsharespurchasedSold 153K shares (90.3%) · Q1 2026. Average closing price $99.79 · Price range $79.73–$125.93153Ksharessold
Average closing price · filing quarter
$99.79
Price range · filing quarter
$79.73 – $125.93
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −153K −$15M −90.3% 16K May 15, 2026
Q4 2025 Added +101K +$10.0M +147.3% 170K Feb 17, 2026
Q3 2025 Reduced −84K −$6.5M −54.9% 69K Nov 14, 2025
Q2 2025 Added +134K +$7.2M +734.1% 152K Aug 14, 2025
Q1 2025 Reduced −94K −$5.5M −83.8% 18K May 15, 2025
Q4 2024 Reduced −73K −$3.7M −39.3% 112K Feb 14, 2025
Q3 2024 New +185K +$9.0M – 185K Nov 14, 2024
Q1 2024 Reduced −28K −$1.8M −20.0% 113K May 15, 2024
Q4 2023 Added +3K +$187K +2.2% 141K Feb 14, 2024
Q3 2023 Added +127K +$7.2M +1,125.0% 138K Nov 14, 2023
Q2 2023 New +11K +$619K – 11K Aug 14, 2023
Q4 2022 New +41K +$1.4M – 41K Feb 14, 2023
Q1 2022 Reduced −4K −$102K −11.7% 28K May 16, 2022
Q4 2021 New +31K +$799K – 31K Feb 14, 2022
Q1 2021 First covered – – – 151K May 21, 2021
Data through Q1 2026 · filed May 15, 2026
15 grouped rows from 15 quarters

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Common questions

Does Ken Griffin own RMBS?

Yes. As of Q1 2026, Ken Griffin disclosed 16K shares of RMBS, worth $1.4M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy RMBS?

Ken Griffin held RMBS since at least Q1 2021, when this filing coverage begins; the opening snapshot is not a disclosed purchase. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell RMBS?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in RMBS. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of RMBS does Ken Griffin own?

Ken Griffin disclosed 16K shares of RMBS as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for RMBS?

Ken Griffin's estimated average buy price for RMBS is $80.03, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.