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Jim Simons's Arm Holdings plc American Depositary Shares (ARM) position

Yes: as of Q1 2026, Jim Simons holds 17K shares of ARM worth $2.6M (0.0% of the disclosed portfolio). Last quarter the position was reduced by 96.4%. First disclosed Q1 2024.
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Current value
$2.6M
Shares held
17K
% of portfolio
0.0%
Est. average buy price (i)
$138.14
Quarter-end price
$151.28

Estimated trade prices

Average price in quarters with purchases
$124.98
Average prices in quarters with sales
  • Q1 2026: $121.40 (457K shares sold)
  • Q4 2025: $145.40 (22K shares sold)
  • Q2 2024: $124.33 (26K shares sold)

ARM price vs Simons's position

Dates
$40$200$400$600202420252026New position of 700K shares · Q1 2024. Average closing price $105.98 · Price range $67.05–$148.97700KsharespurchasedSold 26K shares (3.8%) · Q2 2024. Average closing price $124.33 · Price range $87.19–$174.1326KsharessoldAdded 396K shares (58.8%) · Q3 2024. Average closing price $142.09 · Price range $107.09–$186.46396KsharespurchasedNew position of 20K shares · Q1 2025. Average closing price $139.45 · Price range $106.79–$179.9320KsharespurchasedAdded 167K shares (856.9%) · Q2 2025. Average closing price $124.06 · Price range $85.82–$165.46167KsharespurchasedAdded 309K shares (165.5%) · Q3 2025. Average closing price $145.68 · Price range $131.16–$164.37309KsharespurchasedSold 22K shares (4.4%) · Q4 2025. Average closing price $145.40 · Price range $109.31–$178.6222KsharessoldSold 457K shares (96.4%) · Q1 2026. Average closing price $121.40 · Price range $104.55–$157.07457Ksharessold
Average closing price · filing quarter
$121.40
Price range · filing quarter
$104.55 – $157.07

Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Reduced −457K −$55M −96.4% 17K May 14, 2026
Q4 2025 Reduced −22K −$3.2M −4.4% 474K Feb 12, 2026
Q3 2025 Added +309K +$45M +165.5% 495K Nov 13, 2025
Q2 2025 Added +167K +$21M +856.9% 187K Aug 13, 2025
Q1 2025 New +20K +$2.7M 20K May 14, 2025
Q3 2024 Added +396K +$56M +58.8% 1.1M Nov 13, 2024
Q2 2024 Reduced −26K −$3.3M −3.8% 674K Aug 9, 2024
Q1 2024 New +700K +$74M 700K May 13, 2024
Data through Q1 2026 · filed May 14, 2026
8 grouped rows from 8 quarters

More Simons positions

Common questions

Does Jim Simons own ARM?

Yes. As of Q1 2026, Jim Simons disclosed 17K shares of ARM, worth $2.6M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Jim Simons buy ARM?

Jim Simons first disclosed a ARM position in Q1 2024; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Jim Simons sell ARM?

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

How many shares of ARM does Jim Simons own?

Jim Simons disclosed 17K shares of ARM as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Jim Simons pay for ARM?

Jim Simons's estimated average buy price for ARM is $138.14, 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.